Mo sulfide / ti carbide layered hydrogel-based moisture power generation fabric, preparation method and application

Abstract

The application discloses a kind of based on molybdenum sulfide / titanium carbide layered hydrogel moisture power generation fabric, preparation method and application.Layered coating process is used, water-absorbing end is constructed by introducing sulfonic acid group and hygroscopic lithium ion in hydrogel matrix on cotton fabric, and rich oxygen-containing functional group promotes the capture of atmospheric water molecules;Water evaporation end is constructed with 1T phase molybdenum sulfide and titanium carbide nanosheet van der waals heterojunction, the existence of built-in water gradient and proton gradient promotes the rapid transmission of electric charge, so as to be conducive to the generation of excellent electric output performance, fabric can spontaneously absorb moisture in the air to generate continuous power output.The application constructs molybdenum sulfide / titanium carbide & sulfonic acid group layered hydrogel moisture induction power generation fabric with unique dry-wet interface and oxygen-containing functional group distribution, realizes the collection and utilization of environmental humidity energy, and has wide application prospect and potential in the field of flexible wear, energy conversion and health monitoring, with excellent moisture power generation and sensing performance.

Description

TECHNICAL FIELD

[0001] The application relates to a preparation method of a layered molybdenum sulfide / titanium carbide hydrogel-based moisture power generation fabric and application thereof in intelligent wear, flexible sensing and energy technology, and belongs to the technical field of material preparation and application. BACKGROUND

[0002] A large amount of moisture in the ambient air is a kind of neglected huge water and energy, which is driven to generate energy through the interface between water and active materials, so as to meet the increasing energy demand of intelligent wearable devices and alleviate the crisis of excessive consumption of fossil energy (see document: Nature 2020 , 578, 550). Wearable moisture power generators taking textiles as energy conversion media can effectively collect clean energy from the human body or the environment, which has attracted extensive attention of the scientific and engineering communities in the field of self-powered wearables (see document: Science. 2020 , 368, 1091). However, the practical application of the previous moisture power generation system has been hindered by its unsustainable power generation and low power density output, which is difficult to meet the actual demand of wearable electronics and engineering application constitutes a major challenge (see document: Nat. Nanotechnol. 2021 , 16, 811). Notably, the textile-based moisture power generator exhibits excellent flexibility and adaptability, while the unique porous structure and micro-nano level channel provide effective absorption of water molecules and rapid ion / electron transmission, which provides an effective way for the practical application of self-powered flexible wet electric devices (see document: Joule 2023 , 7, 935).

[0003] Textile materials have the advantages of light weight, excellent flexibility, air permeability and high adaptability to complex deformation, and thus have significant attraction in the manufacture of wearable electronic products such as personal health care and realization of human-computer interaction. Intelligent textiles / electronic textiles constructed by integrating functional materials with traditional textiles have attracted high attention in the fields of human health monitoring, flexible sensing and energy conversion. Through the structural design of functional materials, the optimization of interface structure and the construction of built-in electric field in the device, a textile type generator with continuous moisture collection and power output is designed, which is crucial for the engineering development and application of self-powered electronic textiles. SUMMARY

[0004] The present application aims at the deficiencies of the existing wet power generation device, such as rigidity, non-sustainability, low electric output performance, complex process design conditions, and the need for liquid water droplets to trigger power generation, and is difficult to meet the application requirements in self-powered wearable devices, and provides a textile type humidity induced power generation device capable of self-adsorbing environmental humidity for power generation, a preparation method and application.

[0005] The technical solution for achieving the object of the present application is to provide a molybdenum sulfide / titanium carbide layered hydrogel humidity power generation fabric, which uses fabric as a base material, pours metal phase molybdenum sulfide / titanium carbide nanosheets as a dry end, and pours a hydrogel rich in sulfonic acid groups and hydroxyl groups as a wet end, to build a dry-wet gradient and an oxygen-containing functional group gradient.

[0006] The preparation method of the molybdenum sulfide / titanium carbide layered hydrogel humidity power generation fabric according to the present application comprises the following steps:

[0007] (1) Ammonium molybdate tetrahydrate and thiourea with a mass ratio of 1:2.0-1:3.0 are prepared into a precursor solution with a concentration of 5-10 g / L, and are stirred vigorously for 30-60 min, and then are subjected to hydrothermal reaction at a temperature of 180-220 DEG C for 15-20 h, and after the reaction solution is cooled, is subjected to ultrasonic cleaning and drying to obtain metal phase molybdenum sulfide nanosheets; a mixed solution of lithium fluoride and hydrochloric acid with a volume concentration of 5-10 % is prepared, and titanium carbide aluminum with a mass concentration of 1-5 % is added to the mixed solution, and the reaction is carried out at a temperature of 35-55 DEG C for 12-36 h, and the product is sequentially subjected to ultrasonic treatment with ethanol and water for 60-120 min, and then is subjected to centrifugal treatment at 3000-4000 rpm to obtain a titanium carbide nanosheet dispersion solution; metal phase molybdenum sulfide nanosheets are added to the titanium carbide nanosheet dispersion solution at a molar ratio of molybdenum sulfide to titanium carbide of 1:2.0-1:4.0, and are treated under ultrasonic conditions at a power of 1200-1500 W for 2-4 h to obtain a molybdenum sulfide / titanium carbide dispersion solution;

[0008] (2) Polyvinyl alcohol and acrylamide monomers with a mass ratio of 1:5-1:15 are added to deionized water to prepare a mixed solution with a concentration of 10-30 g / L, and the mixed solution is continuously stirred in a water bath at 85-95 DEG C for 30-60 min, and after being cooled to room temperature, lithium chloride and 2-acrylamide-2-methylpropanesulfonic acid with a concentration of 2-5 g / L in the reaction system, and polyvinylbenzenesulfonic acid with a concentration of 20-60 mg / L in the reaction system are added, and the stirring is continuously carried out for 30-90 min, and then ammonium persulfate and N-N-methylenebisacrylamide with a concentration of 1-5 g / L in the reaction system are added, and finally a sulfonic acid group hydrogel solution is obtained;

[0009] (3) The alkali-treated cotton fabric is cut into long strips, and the loading amount of the molybdenum sulfide / titanium carbide nanosheet and the sulfonic acid-based hydrogel on the fabric is 0.25-0.75 mL / cm 2 The molybdenum sulfide / titanium carbide nanosheet dispersion solution obtained in step (1) and the sulfonic acid-based hydrogel solution obtained in step (2) are loaded on both ends of the cotton fabric by a layered coating process, and then heat polymerization is performed at a temperature of 30-90 DEG C for 1-3 h to obtain a layered hydrogel moisture power generation fabric with asymmetric distribution of dry-wet interfaces and oxygen-containing functional groups.

[0010] The application of the layered hydrogel moisture power generation fabric based on molybdenum sulfide / titanium carbide according to the application integrates the fabric with an electrode material to construct a moisture power generation device, spontaneously adsorbs moisture in the environment for power generation, and generates a continuous power output of 0.6 V or more.

[0011] The moisture power generation device according to the application is used as a flexible sensing material for breath monitoring.

[0012] The application constructs a layered hydrogel moisture power generation fabric with a heterogeneous structure having obvious moisture absorption difference on a cotton fabric substrate by a simple layered coating method. The oxygen-rich sulfonic acid group and the hydroxyl group integrated in the hydrogel matrix at one end of the cotton fabric as a water adsorption layer promote the capture of atmospheric water molecules, provide a guarantee for efficient adsorption and transmission of water, and thus facilitate the generation of continuous power output performance. The two-dimensional nanosheet structure of molybdenum sulfide / titanium carbide van der Waals heterojunction integrated at the other end of the cotton fabric as a water evaporation layer provides abundant nanofluid channels formed by the stacking of nanosheets, thus facilitating the directional migration of a large number of protons dissociated by oxygen-containing functional groups induced by water, and the existence of the built-in proton gradient and water gradient promotes the generation of high power output performance. In summary, the prepared molybdenum sulfide / titanium carbide layered hydrogel moisture power generation fabric has a unique dry-wet interface and a heterogeneous structure of oxygen-containing functional groups, realizes the collection and utilization of environmental moisture energy and generates a continuous power output, and can be further applied in the fields of energy conversion and flexible sensing.

[0013] The principle on which the present application is based is: a layered hydrogel moisture power generation fabric with dry side molybdenum sulfide / titanium carbide and wet side sulfonic acid-based hydrogel is constructed by means of layered coating. The construction of dry-wet interface and asymmetric oxygen-containing functional group distribution, the oxygen-rich functional group and moisture-absorbing lithium ion on the wet side of the sulfonic acid-based hydrogel can spontaneously capture moisture in the air, form an internal water gradient and transmit to the dry side molybdenum sulfide / titanium carbide end, the formation of the double electric layer of the molybdenum sulfide / titanium carbide nanosheet stack surface promotes the rapid migration of electric charges, and a large number of protons are dissociated from the oxygen-containing functional groups under the induction of moisture, the asymmetric oxygen-containing functional group distribution on both ends and the construction of proton concentration difference promote the directional migration of protons, thereby facilitating the formation of high potential difference and generating high voltage and current output, realizing the collection and conversion of environmental moisture energy.

[0014] Compared with the prior art, the present application has the following beneficial effects:

[0015] 1. The present application constructs a layered hydrogel moisture power generation fabric with the function of collecting and converting environmental moisture energy by means of layered coating, the construction of dry-wet interface and asymmetric oxygen-containing functional group distribution in the fabric promotes the capture of environmental moisture; at the same time, the nanofluid channel formed by the nanosheet stack promotes the rapid flow of water and the migration of electrons, realizing the conversion of moisture energy to electrical energy, and further integrating with a mask and the like can realize the monitoring of human respiration.

[0016] 2. The technical scheme of the present application has the characteristics of simple preparation process and high yield, which is beneficial to the engineering production and the application in the field of intelligent electronic textiles. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 The layered hydrogel moisture power generation fabric prepared in Example 1 of the present application and the scanning electron microscope (SEM) comparison chart of the molybdenum sulfide / titanium carbide end and the sulfonic acid-based hydrogel end;

[0018] Figure 2 The X-ray diffraction (XRD) comparison chart of the molybdenum sulfide / titanium carbide end and the sulfonic acid-based hydrogel end of the layered hydrogel moisture power generation fabric prepared in Example 1 of the present application before and after preparation;

[0019] Figure 3 The Fourier infrared spectrum (FT-IR) comparison chart of the molybdenum sulfide / titanium carbide end and the sulfonic acid-based hydrogel end of the layered hydrogel moisture power generation fabric prepared in Example 1 of the present application;

[0020] Figure 4 The water contact angle comparison chart of the molybdenum sulfide / titanium carbide end and the sulfonic acid-based hydrogel end of the layered hydrogel moisture power generation fabric prepared in Example 1 of the present application;

[0021] Figure 5Preparation of layered hydrogel moisture power generation fabric of molybdenum sulfide / titanium carbide end and sulfonic acid group hydrogel end for the present application embodiment 1, test of moisture power generation performance of layered hydrogel fabric;

[0022] Figure 6 Preparation of layered hydrogel moisture power generation fabric of molybdenum sulfide / titanium carbide end and sulfonic acid group hydrogel end for the present application embodiment 1, test of moisture power generation performance of layered hydrogel fabric;

[0023] Figure 7 Preparation of layered hydrogel moisture power generation fabric of molybdenum sulfide / titanium carbide end and sulfonic acid group hydrogel end for the present application embodiment 1, test of moisture power generation performance of layered hydrogel fabric. DETAILED DESCRIPTION

[0024] The technical solutions of the present application will be further described through the following drawings and examples. Example 1

[0025] Accurately weigh 0.30 g of ammonium molybdate tetrahydrate and 0.68 g of thiourea into 60 mL of deionized water, and form a molybdenum sulfide precursor solution after stirring vigorously for 30 min, then transfer to a 100 mL polytetrafluoroethylene reaction kettle, and hydrothermally react at a temperature of 180℃ for 20 h, then cool, ultrasonic clean and dry to obtain metal phase molybdenum sulfide nanosheet powder; accurately weigh 1.5 g of carbon titanium aluminum into 30 mL of a mixed solution of lithium fluoride and hydrochloric acid, and stir at a temperature of 35℃ for 12 h, then ultrasonic treat the product with ethanol and water for 60 min, and centrifuge at 3000 rpm to obtain a carbon titanium nanosheet dispersion solution; then, add 0.1 g of molybdenum sulfide nanosheet into 10 mL of the carbon titanium nanosheet dispersion solution, and treat in a 1200 W high-power ultrasonic wave for 2 h to obtain a molybdenum sulfide / carbon titanium dispersion solution.

[0026] Add 1.5 g of polyvinyl alcohol into a beaker containing 50 mL of deionized water, continuously stir in a 95℃ water bath for 30 min, then add 10 g of acrylamide monomer, stir and cool to room temperature, then continue to add 0.1 g of lithium chloride, 0.1 g of 2-acrylamide-2-methylpropanesulfonic acid and 10 mL of polyvinylbenzenesulfonic acid solution, and continue to stir for 30 min, then add 0.15 g of ammonium persulfate and N-N-methylene bisacrylamide to obtain a sulfonic acid group hydrogel solution;

[0027] Cut the alkali treated cotton fabric into a size of 4×1 cm 2The long strip-shaped fabric is coated with a drop dispenser to apply 0.15 mL of the molybdenum sulfide / titanium carbide dispersion and the sulfonic acid-based hydrogel solution to both sides of the fabric, respectively, by layer-by-layer coating. The material can penetrate the fabric and wrap around the fiber surface under the wicking action of the fabric. The coating operation is repeated 3 times, and the fabric is heat polymerized at 60 ℃ for 2 h to obtain a layered hydrogel moisture power generation fabric with asymmetric distribution of dry-wet interfaces and oxygen-containing functional groups. The fabric is further connected with a carbon electrode to construct a moisture power generation device.

[0028] The test results show that, compared with the instantaneous voltage of 32.4 mV of the molybdenum sulfide / titanium carbide fabric and the voltage of 0.35 V of the sulfonic acid-based hydrogel fabric, the layered hydrogel moisture power generation fabric with asymmetric distribution of dry-wet interfaces and oxygen-containing functional groups achieves an excellent voltage output of 0.6 V. Meanwhile, the molybdenum sulfide / titanium carbide end has excellent light-heat conversion performance, and the surface temperature can rise to 62.8 ℃ under the irradiation of 1 standard solar intensity, so that the output current is enhanced from 3.59 μA to 14.3 μA. Further, the excellent moisture sensing performance of the fabric integrated with the mask can realize real-time monitoring of human respiration.

[0029] Referring to the accompanying drawings Figure 1 Figs. 1 to 4 are SEM images of the layered hydrogel moisture power generation fabric prepared in the embodiment and the molybdenum sulfide / titanium carbide end and the sulfonic acid-based hydrogel end of the fabric, respectively. As can be seen, the molybdenum sulfide / titanium carbide nanosheets and the sulfonic acid-based hydrogel are successfully loaded on the fiber surface of the cotton fabric by layer-by-layer coating.

[0030] Referring to the accompanying drawings Figure 2 Figs. 5 and 6 are XRD comparison charts of the molybdenum sulfide / titanium carbide end and the sulfonic acid-based hydrogel end of the layered hydrogel moisture power generation fabric prepared in the embodiment before and after preparation. The results confirm that the molybdenum sulfide / titanium carbide and the sulfonic acid-based hydrogel are successfully loaded on the cotton fabric by layer-by-layer coating.

[0031] Referring to the accompanying drawings Figure 3 Figs. 7 and 8 are FT-IR comparison charts of the molybdenum sulfide / titanium carbide end and the sulfonic acid-based hydrogel end of the layered hydrogel moisture power generation fabric prepared in the embodiment. The presence of less -OH group and -F group in the molybdenum sulfide / titanium carbide end makes its hydrophilicity relatively poor. The rich -OH group and -SO3H group in the sulfonic acid-based hydrogel end make it have excellent hydrophilicity, thereby constructing the differential hydrophilicity of the hydrogel fabric at both ends.

[0032] Referring to the accompanying drawings Figure 4The water contact angle of the layered hydrogel moisture power generation fabric prepared in this embodiment is compared between the molybdenum sulfide / titanium carbide end and the sulfonic acid group hydrogel end. The water contact angle of the molybdenum sulfide / titanium carbide end is 60° when the water droplet contacts for 25 s. The water contact angle of the sulfonic acid group hydrogel end is 24° when the water droplet contacts for 1 s. The obvious difference in moisture absorption between the two ends of the layered hydrogel fabric forms an internal water gradient, thereby promoting the directional transport of moisture.

[0033] Referring to the accompanying drawings Figure 5 The moisture power generation performance of the layered hydrogel moisture power generation fabric prepared in this embodiment is tested between the molybdenum sulfide / titanium carbide end and the sulfonic acid group hydrogel end. (a) The graph shows the wet electric voltage output of the molybdenum sulfide / titanium carbide fabric, which has a voltage output of 32.4 mV. (b) The graph shows the wet electric voltage output of the sulfonic acid group hydrogel fabric, which has a voltage output of 0.35 V. (c) The graph shows the wet electric voltage output of the molybdenum sulfide / titanium carbide & sulfonic acid group layered hydrogel moisture power generation fabric. (d) The graph shows the wet electric current output of the molybdenum sulfide / titanium carbide & sulfonic acid group layered hydrogel moisture power generation fabric. The layered hydrogel moisture power generation fabric with a dry-wet interface and an asymmetric distribution of oxygen-containing functional groups achieves excellent voltage output of 0.6 V.

[0034] Referring to the accompanying drawings Figure 6 The absorption spectrum of the layered hydrogel moisture power generation fabric prepared in this embodiment is tested between the molybdenum sulfide / titanium carbide end and the sulfonic acid group hydrogel end, and the light synergistic enhancement of the moisture power generation performance is tested. (a) The graph shows the light absorption performance of the molybdenum sulfide / titanium carbide end and the sulfonic acid group hydrogel end in the 200-2500 nm wavelength range. The molybdenum sulfide / titanium carbide end has excellent light absorption performance and has application potential for light-heat conversion. (b) The graph shows the photothermal test of the molybdenum sulfide / titanium carbide end. The surface temperature can rise to 62.8 ℃ under the irradiation of 1 standard solar intensity. (c) The graph shows the wet electric voltage of the layered hydrogel fabric under simulated sunlight irradiation. As the surface temperature of the molybdenum sulfide / titanium carbide end increases, the voltage increases from 0.611 V to 0.613 V. (d) The graph shows the wet electric current of the layered hydrogel fabric under simulated sunlight irradiation. As the surface temperature of the molybdenum sulfide / titanium carbide end increases, the current increases from 3.59 μA to 14.3 μA, which confirms the potential of synergistic enhancement of the moisture power generation performance by sunlight.

[0035] Referring to the accompanying drawings Figure 7 The self-powered breath sensing performance of the layered hydrogel moisture power generation fabric prepared in this embodiment is tested. It is confirmed that the moisture power generation fabric has good responsiveness to human respiratory moisture, and can be further applied to real-time monitoring of human respiratory conditions, thereby showing broad application prospects in flexible moisture sensing. Example 2

[0036] Accurately weigh 0.45 g of ammonium molybdate tetrahydrate and 0.105 g of thiourea into 60 mL of deionized water, and after stirring vigorously for 45 min, a molybdenum sulfide precursor solution is formed, which is transferred to a 100 mL polytetrafluoroethylene reactor, and then hydrothermally reacted at a temperature of 220°C for 15 h. After cooling, the metal phase molybdenum sulfide nanosheet powder is obtained by ultrasonic cleaning and drying; accurately weigh 2.5 g of carbon titanium aluminum into 50 mL of a mixed solution of lithium fluoride and hydrochloric acid, and stir at a temperature of 45°C for 15 h. The product is ultrasonically treated with ethanol and water for 90 min, and then centrifuged at 4000 rpm to obtain a carbon titanium nanosheet dispersion solution; then, 0.3 g of molybdenum sulfide nanosheets is added to 15 mL of the carbon titanium nanosheet dispersion solution, and treated in a high-power ultrasonic wave at 1200 W for 4 h to obtain a molybdenum sulfide / carbon titanium dispersion solution.

[0037] Add 1.0 g of polyvinyl alcohol to a beaker containing 50 mL of deionized water, and continuously stir in a 90°C water bath for 45 min. Then add 8 g of acrylamide monomer, stir and cool to room temperature, then add 0.15 g of lithium chloride, 0.15 g of 2-acrylamide-2-methylpropanesulfonic acid, and 8 mL of polyvinylbenzenesulfonic acid solution, and continue to stir for 45 min. Then add 0.08 g of ammonium persulfate and N-N-methylene bisacrylamide to obtain a sulfonic acid-based hydrogel solution.

[0038] The alkali-treated cotton fabric is cut into a size of 4×1 cm 2 of a long strip, and 1.0 mL of the molybdenum sulfide / carbon titanium dispersion solution and the sulfonic acid-based hydrogel solution are respectively poured on both ends of the cotton fabric by layer-by-layer coating, and then heat polymerized at a temperature of 80°C for 1 h to obtain a layered hydrogel moisture power generation fabric with dry-wet interface and asymmetric distribution of oxygen-containing functional groups. Further connected with a carbon electrode to construct a moisture power generation device. Example 3

[0039] Accurately weigh 0.38 g of ammonium molybdate tetrahydrate and 0.75 g of thiourea into 60 mL of deionized water, and after stirring vigorously for 60 min, a molybdenum sulfide precursor solution is formed, which is transferred to a 100 mL polytetrafluoroethylene reactor, and then hydrothermally reacted at a temperature of 200 ℃ for 18 h. After cooling, the metal phase molybdenum sulfide nanosheet powder is obtained by ultrasonic cleaning and drying; accurately weigh 2.0 g of aluminum titanium carbide into 40 mL of a mixed solution of lithium fluoride and hydrochloric acid, and stir at a temperature of 40 ℃ for 24 h. The product is ultrasonically treated with ethanol and water for 60 min, respectively, and then centrifuged at 3500 rpm to obtain a titanium carbide nanosheet dispersion solution; then, 0.2 g of molybdenum sulfide nanosheets is added to 10 mL of the titanium carbide nanosheet dispersion solution, and treated in a high-power ultrasonic wave at 1200 W for 2.5 h to obtain a molybdenum sulfide / titanium carbide dispersion solution.

[0040] Add 2.0 g of polyvinyl alcohol to a beaker containing 50 mL of deionized water, and continuously stir in a water bath at 85 ℃ for 60 min. Then, add 15 g of acrylamide monomer, and after stirring and cooling to room temperature, continue to add 0.2 g of lithium chloride, 0.2 g of 2-acrylamido-2-methylpropanesulfonic acid, and 12 mL of polyvinylbenzenesulfonic acid solution, and continue to stir for 60 min. Then, add 0.2 g of ammonium persulfate and N-N-methylenebisacrylamide to obtain a sulfonic acid-based hydrogel solution;

[0041] The alkali-treated cotton fabric is cut into a size of 4×1 cm 2 of a long strip, and 1.2 mL of the molybdenum sulfide / titanium carbide dispersion solution and the sulfonic acid-based hydrogel solution are respectively poured on both ends of the cotton fabric by layer-by-layer coating, and then heat polymerized at a temperature of 50 ℃ for 3 h to obtain a layered hydrogel moisture power generation fabric with dry-wet interfaces and asymmetric distribution of oxygen-containing functional groups. Further, the layered hydrogel moisture power generation fabric is connected with a carbon electrode to construct a moisture power generation device.

Claims

1. A layered hydrogel based on molybdenum sulfide / titanium carbide for a moisture power generation fabric, characterized by: The following preparation method is used to prepare: (1) The ammonium molybdate tetrahydrate and thiourea with a mass ratio of 1:2.0-1:3.0 are prepared into a precursor solution with a concentration of 5-10 g / L, and are stirred vigorously for 30-60 min, and then are subjected to hydrothermal reaction at a temperature of 180-220 ℃ for 15-20 h. After the reaction solution is cooled, it is subjected to ultrasonic cleaning and drying to obtain metal-phase molybdenum sulfide nanosheets. A mixed solution of lithium fluoride and hydrochloric acid with a volume concentration of 5-10% is prepared, and titanium carbide aluminide with a mass concentration of 1-5% is added to the mixed solution, and the reaction is carried out at a temperature of 35-55 ℃ for 12-36 h. The product is sequentially subjected to ultrasonic treatment with ethanol and water for 60-120 min, and then is subjected to centrifugal treatment at 3000-4000 rpm to obtain a titanium carbide nanosheet dispersion solution. The metal-phase molybdenum sulfide nanosheets are added to the titanium carbide nanosheet dispersion solution at a molar ratio of molybdenum sulfide to titanium carbide of 1:2.0-1:4.0, and are treated under ultrasonic waves with a power of 1200-1500 W for 2-4 h to obtain a molybdenum sulfide / titanium carbide dispersion solution; (2) The polyvinyl alcohol and acrylamide monomers are added to deionized water at a mass ratio of 1:5-1:15 to prepare a mixed solution with a concentration of 10-30 g / L, and the mixed solution is continuously stirred in a water bath at 85-95 ℃ for 30-60 min. After being cooled to room temperature, lithium chloride and 2-acrylamide-2-methylpropanesulfonic acid with a concentration of 2-5 g / L in the reaction system are added, and polyvinylbenzenesulfonic acid with a concentration of 20-60 mg / L in the reaction system is added. After continuous stirring for 30-90 min, ammonium persulfate and N-N-methylenebisacrylamide with a concentration of 1-5 g / L in the reaction system are added, and finally a sulfonic acid-based hydrogel solution is obtained; (3) The alkali-treated cotton fabric is cut into long strips, and the loading amount of the molybdenum sulfide / titanium carbide nanosheet and the sulfonic acid-based hydrogel on the fabric is 0.25-0.75 mL / cm 2 The molybdenum sulfide / titanium carbide nanosheet dispersion solution obtained in step (1) and the sulfonic acid-based hydrogel solution obtained in step (2) are loaded on both ends of the cotton fabric by a layered coating process, and then heat polymerization is performed at a temperature of 30-90 ℃ for 1-3 h to obtain a layered hydrogel moisture power generation fabric with dry-wet interfaces and asymmetric distribution of oxygen-containing functional groups.

2. A method for preparing a layered hydrogel-based molybdenum sulfide / titanium carbide moisture power generation fabric, characterized by The following steps are included: (1) The ammonium molybdate tetrahydrate and thiourea with a mass ratio of 1:2.0-1:3.0 are prepared into a precursor solution with a concentration of 5-10 g / L, and are stirred vigorously for 30-60 min, and then are subjected to hydrothermal reaction at a temperature of 180-220 ℃ for 15-20 h. After the reaction solution is cooled, it is subjected to ultrasonic cleaning and drying to obtain metal-phase molybdenum sulfide nanosheets. A mixed solution of lithium fluoride and hydrochloric acid with a volume concentration of 5-10% is prepared, and titanium carbide aluminide with a mass concentration of 1-5% is added to the mixed solution, and the reaction is carried out at a temperature of 35-55 ℃ for 12-36 h. The product is sequentially subjected to ultrasonic treatment with ethanol and water for 60-120 min, and then is subjected to centrifugal treatment at 3000-4000 rpm to obtain a titanium carbide nanosheet dispersion solution. The metal-phase molybdenum sulfide nanosheets are added to the titanium carbide nanosheet dispersion solution at a molar ratio of molybdenum sulfide to titanium carbide of 1:2.0-1:4.0, and are treated under ultrasonic waves with a power of 1200-1500 W for 2-4 h to obtain a molybdenum sulfide / titanium carbide dispersion solution; (2) according to the mass ratio of polyvinyl alcohol and acrylamide monomer is 1:5~1:15 into deionized water, configuration concentration is 10~30 g / L mixed solution, in 85~95 ℃ water bath pot continues to stir 30~60 min, after cooling to room temperature, add in the reaction system concentration is 2~5 g / L lithium chloride and 2-acrylamide-2-methylpropane sulfonic acid, and in the reaction system concentration is 20~60 mg / L polyvinyl benzene sulfonic acid, continues to stir 30~90 min, then add in the reaction system concentration is 1~5 g / L of persulfate amine and N-N-methylene double acrylamide, finally get sulfonic acid based hydrogel solution; (3) The alkali-treated cotton fabric is cut into long strips, and the loading amount of the molybdenum sulfide / titanium carbide nanosheet and the sulfonic acid-based hydrogel on the fabric is 0.25-0.75 mL / cm 2 The molybdenum sulfide / titanium carbide nanosheet dispersion solution obtained in step (1) and the sulfonic acid-based hydrogel solution obtained in step (2) are loaded on both ends of the cotton fabric by a layered coating process, and then heat polymerization is performed at a temperature of 30-90 ℃ for 1-3 h to obtain a layered hydrogel moisture power generation fabric with dry-wet interfaces and asymmetric distribution of oxygen-containing functional groups.

3. Use of a layered molybdenum sulfide / titanium carbide hydrogel-based fabric for generating electricity from humidity according to claim 1, characterized in that: It is integrated with electrode material to build a humidity power generation device, spontaneously adsorbs humidity in the environment for power generation, and generates a continuous power output of 0.6 V or more.

4. Use of a layered hydrogel based on molybdenum sulfide / titanium carbide for a humidity-powered textile according to claim 3, characterized in that: The humidity power generation device is used as a flexible sensing material for breath monitoring.

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