A reactor for photocatalytic production of hydrogen

Abstract

This invention provides a reactor for photocatalytic hydrogen production, comprising a radiation lamp and a catalytic component; the radiation lamp is capable of radiating non-natural light with λ≥420nm or is a standard spectrum solar radiation lamp; the catalytic component is loaded with Ti3C2T. x / CdS catalyst material, the Ti3C2T x / CdS catalyst materials include nano-CdS and Ti3C2T x Materials, nano-CdS in nanoparticle form with Ti3C2T x Material composite; the Ti3C2T x / Ti3C2T in CdS catalyst material x The weight ratio of the material to nano-CdS is 100; the light from the radiant lamp can irradiate Ti3C2T. x This invention addresses the problems of low efficiency and high cost in biomass photocatalytic hydrogen production using CdS catalyst materials.

Description

Technical Field

[0001] This invention relates to the field of energy equipment, and more specifically to a reactor for photocatalytic hydrogen production. Background Technology

[0002] A biomass photocatalytic hydrogen production reactor is a device that uses a photocatalyst to catalytically decompose biomass or catalytically reduce water from biomass under light conditions to produce hydrogen. This reactor combines photocatalysis and biomass conversion technologies, offering advantages such as high efficiency, environmental friendliness, and sustainability.

[0003] The photocatalytic hydrogen production catalysts used in existing reactors include CdS, CdS-Ru, and MXene-CdS. However, CdS has a high electron-hole recombination rate and low hydrogen production efficiency when used as a catalyst; CdS-Ru catalyst has high cost and low hydrogen production efficiency; MXene-CdS catalyst also has the problems of high cost and low hydrogen production efficiency. Summary of the Invention

[0004] The purpose of this invention is to provide a reactor for photocatalytic hydrogen production, so as to solve the problems of low efficiency and high cost of biomass photocatalytic hydrogen production in the prior art.

[0005] This invention is achieved through the following technical solution:

[0006] A reactor for photocatalytic hydrogen production, comprising a radiation lamp and a catalytic component; the radiation lamp is capable of radiating non-natural light with λ≥420nm or is a standard spectrum solar radiation lamp.

[0007] The catalytic component is loaded with Ti3C2T. x / CdS catalyst material, the Ti3C2T x / CdS catalyst materials include nano-CdS and Ti3C2T x Materials, nano-CdS in nanoparticle form with Ti3C2T x Material composite; the Ti3C2T x / Ti3C2T in CdS catalyst material x The weight ratio of the material to nano-CdS is 100; the light from the radiant lamp can irradiate Ti3C2T. x / CdS catalyst material.

[0008] Preferably, the Ti3C2T x The preparation method of / CdS catalyst material includes the following steps:

[0009] Ti3C2T was added to a nano-CdS suspension under stirring conditions. xThe dispersion liquid is stirred to obtain a mixed suspension; the mixed suspension is stabilized at 155-165℃ for 36-48h; after cooling, solid-liquid separation is performed and the solid precipitate is collected to obtain Ti3C2T x / CdS material.

[0010] Further, the preparation method of the nano-CdS suspension liquid comprises:

[0011] After mixing the Na2S aqueous solution and the Cd(NO3)2 aqueous solution, the mixture is stirred to react for 36-48h to obtain the CdS suspension liquid.

[0012] The CdS suspension liquid is stabilized at 155-165℃ for 36-48h to obtain the nano-CdS suspension liquid.

[0013] Preferably, the reactor for photocatalytic preparation of hydrogen further comprises a quartz reaction container, a hydrogen gas collection assembly, a feeding mechanism and a sealing assembly of the quartz reaction container; the feeding mechanism is connected with a feeding port of the quartz reaction container, and the quartz reaction container is in gas communication with the hydrogen gas collection assembly; the radiation lamp and the catalytic assembly are both arranged in the quartz reaction container.

[0014] Preferably, the quartz reaction container is in a cylindrical or cylindrical-like shape, and the catalytic assembly comprises a cylindrical carrier plate, and the Ti3C2T x / CdS catalyst material is loaded on the inner circumferential surface of the cylindrical carrier plate.

[0015] The quartz reaction container comprises a first circumferential side wall, a second circumferential side wall and a bottom wall which are integrally connected; the second circumferential side wall is coaxially arranged in the first circumferential side wall, and the first circumferential side wall, the second circumferential side wall and the bottom wall enclose an annular columnar solution space, and the second circumferential side wall and the bottom wall enclose a cylindrical space; the radiation lamp is arranged in the cylindrical space in the second circumferential side wall.

[0016] The cylindrical carrier plate is located in the annular columnar solution space and is coaxially arranged with the first circumferential side wall.

[0017] Further, the cylindrical carrier plate is arranged close to the first circumferential side wall of the quartz reaction container.

[0018] Further, the cylindrical carrier plate is in close contact with the inner side of the first circumferential side wall of the quartz reaction container.

[0019] Further, the cylindrical carrier plate is composed of 4-12 coaxial circular arc plates, and each circular arc plate is connected with a rotating shaft at the bottom, the rotating shaft is slidably arranged on a sliding rail which radiates outward from the central axis of the quartz reaction container, and the sliding rail is arranged on the bottom wall of the quartz reaction container.

[0020] Further, the quartz reaction container is provided with a water inlet pipe and a water outlet pipe, a stirring mechanism is arranged in the annular columnar solution space of the quartz reaction container, and the hydrogen gas collecting assembly comprises a gas buffer tank, a gas compression pump and a hydrogen tank which are in gas circuit communication with each other.

[0021] Further, the photocatalytic hydrogen production reactor further comprises a control system for controlling the radiation lamp, the stirring mechanism and the gas compression pump through a circuit or a network.

[0022] Compared with the prior art, the photocatalytic hydrogen production reactor has the following beneficial effects:

[0023] The photocatalytic hydrogen production reactor comprises a radiation lamp and a catalyst assembly, and the catalyst assembly is loaded with a Ti3C2T x / CdS catalyst material. x The Ti3C2T x / CdS catalyst material comprises nano-CdS and Ti3C2T x After the nano-CdS and the Ti3C2T x The mass ratio of the Ti3C2T

[0024] Further, the cylindrical bearing plate is arranged close to the first circumferential side wall of the quartz reaction container, so that light hardly escapes during the photocatalytic radiation reaction process, and the loss caused by light reflection is reduced, which is beneficial to saving light energy.

[0025] Further, the cylindrical bearing plate is composed of 4-12 coaxial circular arc plates and can be slid to the second circumferential side wall of the quartz reaction container, at this time, the catalyst material surface of the circular arc plate faces outward by rotating the rotating shaft, so that the photocatalytic hydrogen production can be carried out by accepting sunlight under the condition that the radiation lamp is turned off, and solar energy is utilized to save energy. Therefore, the reactor can utilize the radiation lamp to carry out the photocatalytic reaction to produce hydrogen, realize the utilization of biomass energy, and also utilize sunlight to carry out the catalytic reaction to save energy. BRIEF DESCRIPTION OF DRAWINGS

[0026] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed to be used in the embodiments or the prior art description will be briefly introduced. Obviously, the drawings in the following description are some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0027] Figure 1 Structure diagram of a reactor for photocatalytic preparation of hydrogen gas according to an embodiment of the present application.

[0028] Figure 2 Structure diagram of a quartz reaction container of a reactor for photocatalytic preparation of hydrogen gas according to an embodiment of the present application.

[0029] Figure 3 Top view of a quartz reaction container of a reactor for photocatalytic preparation of hydrogen gas according to an embodiment of the present application along A-A section.

[0030] In the figure, 1 is a quartz reaction container, 2 is a radiation lamp, 3 is a control system, 4 is a feeding mechanism, 5 is a gas buffer tank, 6 is a gas compression pump, 7 is a hydrogen tank, 8 is a fixing frame, 9 is a water inlet pipe, 10 is a first circumferential side wall, 11 is a second circumferential side wall, 12 is a slide rail, 13 is a cylindrical bearing plate, and 15 is an annular columnar solution space. DETAILED DESCRIPTION

[0031] The present application is described in more detail by the following specific examples. Other advantages and effects of the present application can be easily understood by those skilled in the art from this disclosure. The present application can also be implemented or applied by different specific embodiments, and the details in the present specification can be modified or changed based on different views and applications without departing from the spirit of the present application.

[0032] It should be noted that the process equipment or devices not specifically mentioned in the following examples are all conventional equipment or devices in the art.

[0033] It should be noted that the terms "comprising" and "having" and any variations thereof are intended to cover a non-exclusive inclusion. In addition, it should be noted that the terms "first", "second", and the like in the description and claims of this application are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the use of data in this application is not limited to the specific order in which it is presented herein. The terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like, as well as derivatives thereof, mean relative positions for purposes of illustration and description and are not intended to limit the scope of the application to any particular orientation or configuration unless otherwise specified and limited by the claims. In addition, the terms "mounting", "connected", "connecting" should be interpreted broadly, for example, can be fixed connection, can also be detachable connection; can be direct connection, can also be indirect connection through intermediate medium; can be internal connection of two elements.

[0034] As shown in Figure 1 The photocatalytic hydrogen production reactor according to an embodiment of the application comprises a radiation lamp 2 and a catalytic assembly; the radiation lamp 2 can radiate non-natural light with λ≥420nm or the radiation lamp 2 is a standard spectrum sunlight simulation radiation lamp.

[0035] The catalytic assembly is loaded with Ti3C2T x / CdS catalyst material; the Ti3C2T x / CdS catalyst material comprises nano-CdS and Ti3C2T x material; the nano-CdS is in the form of nanoparticles covering the surface of the Ti3C2T x material; the Ti3C2T x / CdS material; the weight ratio of the Ti3C2T x / CdS to the nano-CdS is (0.8-0.9):100.

[0036] The light of the radiation lamp 2 can irradiate the Ti3C2T x / CdS catalyst material.

[0037] The preparation method of the Ti3C2T x / CdS catalyst material comprises the following steps:

[0038] (1) preparing nano-CdS, comprising the steps of: (I) mixing Na2S aqueous solution with Cd(NO3)2 aqueous solution, and stirring to react for 36-48 hours to obtain CdS suspension, the molar ratio of Na2S to Cd(NO3)2 being 1:(0.95-1.1); (II) stabilizing the CdS suspension at 155-165℃ for 36-48 hours to obtain nano-CdS suspension;

[0039] (2) preparing Ti3C2T x NS dispersion liquid, comprising the steps of: (a) placing Ti3AlC2 powder in hydrofluoric acid, and heating and stirring to react for 18-24 hours at 35-40℃; (b) adding deionized water to repeatedly centrifuge to remove unreacted acid until the pH is more than 6, and collecting the precipitate after centrifugation; (c) adding deionized water to the precipitate collected in step (b), and ultrasonically delaminating the material under ice bath condition to obtain dark green liquid, and centrifuging to remove the precipitate and collect the supernatant as Ti3C2T x NS dispersion liquid;

[0040] (3) uniformly adding Ti3C2T x NS dispersion liquid to the nano-CdS suspension in the stirring process, and stirring for 36-48 hours to obtain mixed suspension; stabilizing the mixed suspension at 155-165℃ for 36-48 hours; and collecting the solid precipitate after solid-liquid separation as Ti3C2T x / CdS material after cooling.

[0041] As a specific embodiment of the present application, the preparation method of the Ti3C2T x / CdS catalyst material comprises the following steps:

[0042] (1) preparing nano-CdS, comprising the steps of: (I) dissolving 2.42g Na2S·9H2O and 3.08g Cd(NO3)2·4H2O in 50mL deionized water respectively to obtain Na2S aqueous solution and Cd(NO3)2 aqueous solution, mixing the Na2S aqueous solution with the Cd(NO3)2 aqueous solution, and stirring to react for 48 hours to obtain CdS suspension, the molar ratio of Na2S to Cd(NO3)2 being 1:1; (II) stabilizing the CdS suspension at 160℃ for 48 hours; (III) solid-liquid separating the suspension treated in step (II) to collect the precipitate to obtain nano-CdS.

[0043] (2) preparing Ti3C2T x(NSs) dispersion, comprising the following steps: (a) Add 40 mL HCl and 3.2 g LiF to a polytetrafluoroethylene beaker, mix thoroughly and stir for 5 min to generate volatile hydrofluoric acid, then slowly add 2 g Ti3AlC2 powder, seal, transfer to a 35°C oil bath and heat and stir for 24 h; (b) Transfer the sample to a 100 mL centrifuge tube, add deionized water and centrifuge repeatedly to remove unreacted acid until pH exceeds 6, retaining the mud-like precipitate at the bottom; (c) Add deionized water to the precipitate collected in step (b), and sonicate at 24°C with a power of 180 W and a frequency of 40 kHz for 15 min to separate the material into layers. Use an ice bath for cooling during sonication to avoid the experimental temperature rise caused by sonication, resulting in a dark green liquid. Centrifuge to remove the precipitate and collect the supernatant as Ti3C2T. x (NSs) dispersion, tested for Ti3C2T x Ti3C2T in (NSs) dispersion x The concentration was 6.5 mg / mL.

[0044] (3) Disperse nano-CdS in deionized water and stir at 27±2℃. During the stirring process, a certain amount of Ti3C2T is added uniformly. x (NSs) dispersion was stirred for 8 hours to obtain a mixed suspension; the mixed suspension was stabilized at 160℃ for 48 hours; after cooling, solid-liquid separation was performed to collect the solid precipitate as Ti3C2T. x / CdS materials; control of nano-CdS, Ti3C2T x The amount of (NSs) dispersion used makes Ti3C2T x / Ti3C2T in CdS material x The mass ratio of Ti3C2T to nano-CdS is 0.8:100. x / CdS material is denoted as CdTi-0.8.

[0045] Different Ti3C2T were prepared using the same method described above. x Catalyst materials with the following content: CdTi-0.1, CdTi-0.5, CdTi-0.6, CdTi-0.7, CdTi-0.9, CdTi-1.0, CdTi-1.5, CdTi-2.5, and CdTi-5.0.

[0046] An anaerobic environment was created by integrating a photocatalytic system and aerating with N2 for 30 minutes. Ti3C2T was then added to 100 mL of glucose solution (1.0 mg / mL). x Using 10 mg of CdS catalyst, the photocatalytic hydrogen production rate of different nanomaterial samples was determined under irradiation with a 300 W Hg lamp (λ≥420 nm) to evaluate the performance of nano-CdS and different nano-Ti3C2T catalysts. x Content Ti3C2Tx photocatalytic performance of Ti3C2T x The photocatalytic activity of the sample is nonlinearly increased with the increase of the loading amount, and shows a peak-shaped trend of first increasing and then decreasing. The photocatalytic activity of the nano-CdS is low, which is 1999 μmol·h -1 ·g -1 The photocatalytic activity of the Ti3C2T x containing nano-CdS (0.6wt%) material is obviously improved, and the photocatalytic hydrogen production activity of the CdTi-0.6 sample can reach 6716 μmol·h x ·g -1 ·g -1 The peak value of the photocatalytic activity of the Ti3C2T x / CdS material appears in the CdTi-0.8 sample with the Ti3C2T x loading amount of 0.8wt%, and the photocatalytic hydrogen production activity can reach 20427 μmol·h -1 ·g -1 , which is 10.22 times of the original CdS. Further increasing the Ti3C2T x loading amount (from 0.9wt% to 5.0wt%), the photocatalytic activity of the Ti3C2T x / CdS composite material is gradually decreased, and when the weight ratio of the Ti3C2T x to the nano-CdS is 0.9:100, the photocatalytic hydrogen production activity can reach 17457 μmol·h -1 ·g -1 .

[0047] The Ti3C2T x / CdS material in the application has the weight ratio of the Ti3C2T x to the nano-CdS of (0.8-0.9):100, and the XRD spectrum does not contain the (002) diffraction peak, and the Ti3C2T x / CdS material with the mass ratio has higher photocatalytic hydrogen production activity and lower material cost. The Ti3C2T x / CdS catalyst material is loaded on the catalytic assembly 13, and is matched with the radiation lamp 2 to form a photocatalytic hydrogen production reactor which can realize industrial production of hydrogen, and the raw material cost of the photocatalytic hydrogen production reactor is lower, and the hydrogen production efficiency is greater.

[0048] As a further preferred embodiment of the application, as Figure 1As shown, the photocatalytic hydrogen production reactor also includes a quartz reaction vessel 1, a hydrogen collection assembly, a feeding mechanism 4, and a sealing assembly for the quartz reaction vessel. The feeding mechanism 4 is connected to the inlet of the quartz reaction vessel 1, and the quartz reaction vessel 1 is connected to the gas path of the hydrogen collection assembly. The radiation lamp 2 and the catalytic assembly are both installed in the quartz reaction vessel 1.

[0049] The aforementioned photocatalytic hydrogen production reactor enables automated and continuous hydrogen production using biomass energy. Those skilled in the art can install suitable sealing components at the required locations based on the reaction conditions.

[0050] As a further preferred embodiment of the present invention, the quartz reaction vessel 1 is cylindrical or near-cylindrical, and the catalytic assembly includes a cylindrical support plate 13 and Ti3C2T x / CdS catalyst material is loaded on the inner circumferential surface of the cylindrical support plate 13.

[0051] like Figure 2 and Figure 3 As shown, the quartz reaction vessel 1 includes a first circumferential sidewall 10, a second circumferential sidewall 11, and a bottom wall integrally connected; the second circumferential sidewall 11 is coaxially disposed within the first circumferential sidewall 10, and the first circumferential sidewall 10, the second circumferential sidewall 11, and the bottom wall enclose an annular cylindrical solution space 15, and the second circumferential sidewall 11 and the bottom wall enclose a cylindrical space. A radiation lamp 2 is disposed within the cylindrical space within the second circumferential sidewall 11.

[0052] The cylindrical support plate 13 is located within the annular solution space 15 and is coaxially arranged with the first circumferential sidewall 10, and the cylindrical support plate 13 is arranged close to the first circumferential sidewall 10 of the quartz reaction vessel 1.

[0053] In the aforementioned photocatalytic hydrogen production reactor, the cylindrical support plate, i.e. the catalyst surface, is coaxially arranged with the side wall of the quartz reaction vessel, while the radiation lamp is located at the axial position. Furthermore, the cylindrical support plate is close to the first circumferential side wall of the quartz reaction vessel, which ensures that light is almost completely dispersed during the photocatalytic radiation reaction process and also reduces the loss caused by light reflection, thus saving light energy.

[0054] As a further preferred embodiment of the present invention, the cylindrical support plate 13 is completely fitted to the inner side of the first circumferential sidewall 10 of the quartz reaction vessel 1.

[0055] As a further preferred embodiment of the present invention, such as Figure 3 As shown, the cylindrical support plate 13 is composed of 4 to 12 coaxial arc plates. The bottom of each arc plate is connected to a rotating shaft. The rotating shaft is slidably mounted on a slide rail 12 that radiates outward from the central axis of the quartz reaction vessel 1. The slide rail 12 is mounted on the bottom wall of the quartz reaction vessel 1, and the rotating shaft can slide along the slide rail 12.

[0056] The reactor for photocatalytic preparation of hydrogen gas makes the catalytic surface of the cylindrical carrier plate rotate outward, and the cylindrical carrier plate is composed of 4-12 coaxial circular arc plates, which can be respectively slid to the second circumferential side wall of the quartz reaction container, at this time rotating the rotating shaft to make the circular arc plate load Ti3C2T x The catalytic surface of the / CdS catalyst material faces outward, so that hydrogen gas can be prepared by photocatalysis under the condition of closing the radiation lamp and receiving sunlight, using solar energy and saving energy.

[0057] As a further preferred embodiment of the present application, the quartz reaction container 1 is provided with a water inlet pipe 9 and a water outlet pipe, and a stirring mechanism is arranged in the annular columnar solution space 15 of the quartz reaction container.

[0058] As a further preferred embodiment of the present application, the hydrogen gas collecting assembly comprises a gas buffer tank 5, a gas compression pump 6 and a hydrogen tank 7 connected in sequence in the gas path. The gas buffer tank 5 is in gas path communication with the annular columnar solution space 15 of the quartz reaction container 1.

[0059] As a further preferred embodiment of the present application, the reactor for photocatalytic preparation of hydrogen gas further comprises a control system 3, which is used to control the radiation lamp 2, the quartz reaction container 1, the stirring mechanism and the gas compression pump 6 through a circuit or a network.

[0060] The reactor for photocatalytic preparation of hydrogen gas realizes automatic control of each component through the control system.

[0061] As a further preferred embodiment of the present application, the reactor for photocatalytic preparation of hydrogen gas further comprises a fixing frame 8, and the quartz reaction container 1 is fixed on the fixing frame 8.

[0062] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application and not to limit the protection scope of the present application. Although the present application has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present application can be modified or replaced by equivalents without departing from the essence and scope of the technical solutions of the present application.

Claims

1. A reactor for photocatalytic production of hydrogen, characterized in that, The reactor for photocatalytic preparation of hydrogen comprises a radiation lamp (2) and a catalytic assembly; the radiation lamp (2) can radiate non-natural light with λ≥420 nm or the radiation lamp (2) is a standard spectrum sunlight simulation radiation lamp; The catalytic component is loaded with Ti3C2T x / CdS catalyst material, the Ti3C2T x / CdS catalyst material comprises nano CdS and Ti3C2T x material, the nano CdS is compounded with Ti3C2T x material in nanoparticle form;The Ti3C2T x / CdS catalyst material in the Ti3C2T x material and nano CdS weight ratio is (0.8-0.9):100;The light of the radiation lamp (2) can be irradiated on the Ti3C2T x / CdS catalyst material; The photocatalytic hydrogen production reactor further comprises a quartz reaction container (1), a hydrogen gas collecting assembly, a feeding mechanism and a sealing assembly of the quartz reaction container; the feeding mechanism (4) is connected with a feeding port of the quartz reaction container (1), the quartz reaction container (1) is in gas communication with the hydrogen gas collecting assembly, the radiation lamp (2) and the catalytic assembly are arranged in the quartz reaction container (1), the quartz reaction container is in a cylindrical or cylindrical-like shape, the catalytic assembly comprises a cylindrical carrier plate (13), the Ti3C2T x / CdS catalyst material is loaded on an inner circumferential surface of the cylindrical carrier plate (13), the quartz reaction container (1) comprises a first circumferential side wall (10), a second circumferential side wall (11) and a bottom wall which are integrally connected, the second circumferential side wall (11) is coaxially arranged in the first circumferential side wall (10), the first circumferential side wall (10), the second circumferential side wall (11) and the bottom wall enclose an annular columnar solution space (15), the second circumferential side wall (11) and the bottom wall enclose a cylindrical space, the radiation lamp (2) is arranged in the cylindrical space in the second circumferential side wall (11), the cylindrical carrier plate (13) is coaxially arranged in the annular columnar solution space (15), the cylindrical carrier plate (13) is arranged close to the first circumferential side wall (10) of the quartz reaction container (1), the cylindrical carrier plate (13) is attached to the inner side of the first circumferential side wall (10) of the quartz reaction container (1), the cylindrical carrier plate (13) is composed of 4-12 coaxial arc plates, the bottom of each arc plate is connected with a rotating shaft, the rotating shaft is slidably arranged on a slide rail (12) which radiates outward from the central axis of the quartz reaction container (1), and the slide rail (12) is arranged on the bottom wall of the quartz reaction container (1). When the circular arc plate slides along the slide rail (12) to the second circumferential side wall of the quartz reaction container through the rotating shaft, rotating the rotating shaft can make the circular arc plate load Ti3C2T x The catalytic surface of the / CdS catalyst material faces outward to receive sunlight for photocatalytic preparation of hydrogen.

2. The reactor for photocatalytic production of hydrogen according to claim 1, characterized in that, The Ti3C2T x A method of preparing a / CdS catalyst material includes the steps of: Ti3C2T / CdS material was prepared by adding Ti3C2T dispersion liquid into the CdS suspension liquid under stirring condition x The mixed suspension liquid was obtained by stirring; the mixed suspension liquid was stabilized at 155-165℃ for 36-48h; after cooling, solid-liquid separation was carried out and the solid precipitate was collected, to obtain Ti3C2T / CdS material x / CdS material was prepared by adding Ti3C2T dispersion liquid into the CdS suspension liquid under stirring condition 3. The reactor for photocatalytic production of hydrogen according to claim 2, characterized in that, The preparation method of the nano CdS suspension liquid comprises: (I) mixing Na2S aqueous solution with Cd(NO3)2 aqueous solution and stirring for 36-48 h to obtain CdS suspension liquid; (II) stabilizing the CdS suspension liquid at 155-165 ℃ for 36-48 h to obtain nano CdS suspension liquid.

4. The reactor for photocatalytic production of hydrogen according to claim 1, characterized in that, The quartz reaction container (1) is provided with a water inlet pipe and a water outlet pipe, a stirring mechanism is arranged in the annular columnar solution space (15) of the quartz reaction container (1), and the hydrogen gas collecting assembly comprises a gas buffer tank (5), a gas compression pump (6) and a hydrogen tank (7) which are in gas connection with each other.

5. The reactor for photocatalytic production of hydrogen according to claim 4, characterized in that, The reactor for photocatalytic preparation of hydrogen further comprises a control system for controlling the radiation lamp (2), the stirring mechanism and the gas compression pump (6) through a circuit or a network.

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