Silane carbon dot / crystal hybrid material and preparation method and application thereof

Abstract

The application discloses a silane carbon dot / crystal hybrid material and a preparation method and application thereof, wherein the silane carbon dot / crystal hybrid material comprises 1,3,5-triethyl benzenetricarboxylate monocrystals and carbon dots adsorbed on the surface of the monocrystals; the particle size of the 1,3,5-triethyl benzenetricarboxylate monocrystals is micron grade or above; and the average particle size of the carbon dots is 3-15 nm. The silane carbon dot / crystal hybrid material is resonated under excitation of 265 nm ultraviolet laser, and generates super wideband laser, and the multi-color laser emission (tunable bandwidth is 285 nm) from ultraviolet light (315 nm) to visible light (600 nm) is realized by using a band-pass filter. Meanwhile, the hybrid material has continuous white light fluorescence under ultraviolet excitation, and has the characteristics of solid-state laser emission and fluorescence emission.

Description

Technical Field

[0001] This invention relates to the field of laser technology. More specifically, it relates to a silane carbon dot / crystal hybrid material, its preparation method, and its applications. Background Technology

[0002] In recent years, lasers have achieved unprecedented development in various fields such as signal communication, biomedicine, laser processing, and optical measurement. One of the key issues for different types of lasers is the laser gain medium. A rich variety of gain media, such as laser dyes, rare-earth materials, perovskites, and quantum dots, has brought tremendous diversity to this field. However, the narrow gain bandwidth of most gain media imposes limitations on color rendering, image display, continuous wave detection, and various other applications. Lasers with multiple wavelengths ranging from deep ultraviolet to red light are particularly advantageous in these areas.

[0003] As a branch of carbon-based nanomaterials and luminescent nanomaterials, carbon dots possess excellent luminescent properties, low cost, environmentally friendly raw materials, and high photothermal stability, making them excellent candidate materials for laser emission. Zhang et al. reported the first tunable laser based on carbon dots, whose wavelength can be tuned in the visible light range of approximately 490-550 nm. However, the tunable bandwidth (approximately 60 nm) is very limited. Furthermore, existing technologies have achieved panchromatic lasers covering the entire visible light range by using three CDs with blue, green, and red emission, but adjusting the proportion of white light emission by controlling the composition of different carbon dots is often difficult. This application proposes a one-step solvothermal reaction to prepare a white-light-emitting carbon dot crystal hybrid material without needing to adjust the ratio of different fluorescent components.

[0004] Furthermore, despite the significant advantages of carbon dots in various aspects, issues such as aggregation quenching, fluorescence instability caused by continuous long-term operation, and aggregation quenching caused by external environmental factors like moisture or oxygen remain obstacles to achieving solid-state fluorescence and laser emission, as well as further applying carbon dots in practice. Summary of the Invention

[0005] Based on the above facts, the purpose of this invention is to provide a silane carbon dot / crystal hybrid material, its preparation method, and its application. This silane carbon dot / crystal hybrid material forms a resonance under 265nm ultraviolet laser excitation and generates ultra-wideband laser. Using a bandpass filter, it realizes multicolor laser emission from ultraviolet light (315nm) to visible light (600nm) (tunable bandwidth of 285nm). At the same time, this hybrid material has continuous white fluorescence under ultraviolet excitation and has the characteristics of solid-state laser emission and fluorescence emission.

[0006] On one hand, the present invention provides a silane carbon dot / crystal hybrid material, characterized in that it comprises a single crystal of triethyl 1,3,5-phenyltricarboxylate and carbon dots adsorbed on the surface of the single crystal;

[0007] The particle size of the triethyl 1,3,5-phenyltricarboxylate single crystal is at or above the micrometer level;

[0008] The average particle size of the carbon dots is 3-15 nm, preferably 6-8 nm, and more preferably 7.6 nm.

[0009] Furthermore, the triethyl 1,3,5-phenyltricarboxylate single crystal is hexagonal.

[0010] Furthermore, the particle size of the triethyl 1,3,5-phenyltricarboxylate single crystal can be in the micrometer or centimeter range. Exemplary examples of triethyl 1,3,5-phenyltricarboxylate single crystals can have a particle size of 200 μm or more, 1 cm or more, etc.

[0011] Furthermore, the carbon dots are adsorbed onto the surface of a triethyl 1,3,5-phenyltricarboxylate single crystal by van der Waals forces.

[0012] Furthermore, the atomic ratio of the carbon dots to the triethyl 1,3,5-benzenetricarboxylate single crystal is 1:4-1:8, preferably 1:5-1:7, and more preferably 1:5-1:6.

[0013] Furthermore, the carbon dots are derived from silane and ethanol after solvothermal treatment.

[0014] Furthermore, the silane is selected from one or more of vinyltriethoxysilane, γ-aminopropyltriethoxysilane, γ-glycidoxypropyltrimethoxysilane, or N-(β-aminoethyl)-γ-aminopropylmethyldimethoxysilane.

[0015] Furthermore, the broadband laser of the silane carbon dot / crystal hybrid material, when excited by 265nm ultraviolet light, covers a range of 315-600nm.

[0016] Furthermore, the solid-state white light coverage of the silane carbon dot / crystal hybrid material is 180-320 nm, for example, the solid-state white light coverage is 330-650 nm.

[0017] In another aspect, the present invention provides a method for preparing the silane carbon dot / crystal hybrid material as described above, comprising the following steps:

[0018] Dissolve 1,3,5-benzenetricarboxylic acid in ethanol, then add silane and mix well to obtain a precursor solution.

[0019] The precursor solution was heated to react under dry conditions, and then cooled to room temperature after the reaction.

[0020] The solids in the collected product are washed and recrystallized using an alcohol solvent to obtain the silane carbon dot / crystal hybrid material.

[0021] This invention has discovered that carbon dot sources, such as aniline systems and citrate-urea systems, can affect the formation of triethyl 1,3,5-phenyltricarboxylate single crystals. Carbon dot sources derived from silanes and alcohols can ensure the formation of carbon dots simultaneously with the growth of triethyl 1,3,5-phenyltricarboxylate single crystals.

[0022] Furthermore, the size of the obtained silane carbon dot / crystal hybrid material can be controlled by adjusting the recrystallization time and temperature. Furthermore, the 1,3,5-benzenetricarboxylic acid is dissolved in ethanol using magnetic stirring.

[0023] Further, the amount of 1,3,5-benzenetricarboxylic acid used is 0.5-2g, the amount of ethanol used is 10-15ml, and the amount of silane used is 5-15ml. For example, the amount of silane used includes, but is not limited to, 5-10ml, 10-15ml, 5ml, 10ml, 15ml, etc. For example, the amount of ethanol used includes, but is not limited to, 10-12ml, 10ml, 15ml, etc. For example, the amount of 1,3,5-benzenetricarboxylic acid used includes, but is not limited to, 0.5-1g, 1-1.5g, 1-2g, 1.5-2g, 0.5-1.5g, 0.5g, 1g, 1.5g, or 2g, etc.

[0024] Furthermore, the reaction is carried out in a polytetrafluoroethylene-lined autoclave within a forced-air drying oven. The volume of the polytetrafluoroethylene-lined autoclave is preferably 30-120 ml.

[0025] Furthermore, the reaction temperature is 150-180℃, and the time is 10-16h. For example, the reaction temperature includes, but is not limited to, 150-160℃, 160-180℃, 160℃, 180℃, etc.

[0026] Furthermore, the washing process employs an alcohol solvent.

[0027] Furthermore, the alcohol solvent is selected from one or more of methanol, ethanol, propanol, and isopropanol.

[0028] Furthermore, the cooling time to room temperature is 0.125-0.75℃ / min. A faster cooling rate results in smaller crystals; a slower cooling rate results in larger crystals. For example, the cooling time to room temperature may include, but is not limited to, 0.25-0.75℃ / min, 0.25-0.5℃ / min, 0.25℃ / min, 0.75℃ / min, etc.

[0029] Furthermore, the cooling time to room temperature is 4-24 hours.

[0030] In another aspect, the present invention provides the application of the silane carbon dot / crystal hybrid material described above in broadband laser emission.

[0031] The beneficial effects of this invention are as follows:

[0032] The hybrid material provided by this invention achieves, for the first time, a laser emission wavelength range from near-ultraviolet (315 nm) to visible light (600 nm) for carbon dot-based materials. This range is significantly wider than previously reported. This ultra-wideband laser emission characteristic of the hybrid crystal holds promise for applications in multicolor laser displays, multi-level laser anti-counterfeiting, and other fields. Under ultraviolet excitation, the silane carbon dot / triethyl 1,3,5-phenyltricarboxylate hybrid crystal exhibits continuous white fluorescence emission. This property is significant for supercontinuum light sources and continuous wave detection. Furthermore, this hybrid material effectively prevents aggregation quenching, successfully realizing solid-state laser emission and fluorescence emission.

[0033] The hybrid material preparation method provided by this invention achieves in-situ hybridization of silane carbon dots and triethyl 1,3,5-phenyltricarboxylate organic crystals using a one-pot solvothermal method. This process simultaneously includes the formation of silane carbon dots, the formation of triethyl 1,3,5-phenyltricarboxylate crystals, and their in-situ hybridization. It is expected to become a general technique for designing novel optical hybrid materials and can be extended to other carbon dot or nanomaterials. Attached Figure Description

[0034] The specific embodiments of the present invention will be described in further detail below with reference to the accompanying drawings.

[0035] Figure 1 The image shows a scanning electron microscope (SEM) image of the silane carbon dots / triethyl 1,3,5-benzenetricarboxylate hybrid crystal prepared in Example 1.

[0036] Figure 2 The image shown is a transmission electron microscope (TEM) image of the silane carbon dots / triethyl 1,3,5-benzenetricarboxylate hybrid crystal prepared in Example 1.

[0037] Figure 3 The fluorescence spectra of the silane carbon dot / triethyl 1,3,5-benzenetricarboxylate hybrid crystal prepared in Example 1 are shown at different excitation wavelengths.

[0038] Figure 4 The laser spectra of the silane carbon dot / triethyl 1,3,5-benzenetricarboxylate hybrid crystal prepared in Example 1 are shown after different bandpass filters.

[0039] Figure 5The X-ray photoelectron spectra of the silane carbon dots / triethyl 1,3,5-benzenedric acid hybrid crystals, silane carbon dots, and triethyl 1,3,5-benzenedric acid prepared in Example 1 are shown.

[0040] Figure 6 The image shown is a scanning electron microscope (SEM) image of the silane carbon dots / triethyl 1,3,5-benzenetricarboxylate hybrid crystal prepared in Example 2.

[0041] Figure 7 Transmission electron microscope (TEM) images of the silane carbon dots prepared in Comparative Example 1 are shown (the inset is a high-magnification TEM image of the silane carbon dots prepared in Comparative Example 1). Detailed Implementation

[0042] To more clearly illustrate the present invention, the following description, in conjunction with preferred embodiments and accompanying drawings, further explains the invention. Similar components in the drawings are indicated by the same reference numerals. Those skilled in the art should understand that the specific description below is illustrative rather than restrictive and should not be construed as limiting the scope of protection of the present invention.

[0043] Example 1

[0044] A method for preparing a silane carbon dot / crystal hybrid material includes the following steps:

[0045] Step S1: Add 1g of 1,3,5-benzenetricarboxylic acid to 10ml of ethanol and dissolve it thoroughly on a magnetic stirrer. Add 10ml of vinyltriethoxysilane and stir to mix thoroughly.

[0046] Step S2: Transfer the precursor solution to an 80 ml polytetrafluoroethylene-lined autoclave, place it in a forced-air drying oven, maintain it at 180°C for 12 h under heating, and then cool it to room temperature at a cooling rate of 0.25°C / min.

[0047] Step S3: After opening the reaction vessel, remove the liquid, take out the solid, wash with ethanol, and dissolve it in the ethanol solution by heating. Then cool and recrystallize, with the cooling rate as in step S2, to obtain the silane carbon dot / crystal hybrid material.

[0048] Figure 1 and Figure 2 The images shown are scanning electron microscope (SEM) and transmission electron microscope (TEM) images of the silane carbon dots / triethyl 1,3,5-benzenetricarboxylate hybrid crystals prepared in Example 1. Figure 1 The crystal grain size is 220 μm, and it belongs to the hexagonal crystal system. Figure 2 As can be seen, carbon dots are uniformly distributed on the crystal, with the carbon dots circled in the middle. The average particle size of the carbon dots is 7.6 nm.

[0049] Figure 3The fluorescence spectrum of the silane carbon dot / triethyl 1,3,5-benzenetricarboxylate hybrid crystal prepared in Example 1 is shown. Figure 3 As can be seen from the data, the hybrid material has two emission centers, located at 410 nm and 520 nm, respectively, and the wavelength of the emission peak also increases with the increase of the excitation wavelength (excitation wavelength dependence).

[0050] Figure 4 The laser spectrum of the silane carbon dot / triethyl 1,3,5-benzenetricarboxylate hybrid crystal prepared in Example 1 is shown. Under 265 nm ultraviolet laser excitation, the hybrid crystal is sandwiched between an aluminum mirror and a Dirac mirror to generate laser emission, with an ultra-wide wavelength range covering 315-600 nm.

[0051] Figure 5 The X-ray photoelectron spectra of the silane carbon dots / triethyl 1,3,5-benzenedric acid hybrid crystal, silane carbon dots, and triethyl 1,3,5-benzenedric acid prepared in Example 1 are shown. The atomic percentage of Si in the silane carbon dots / triethyl 1,3,5-benzenedric acid hybrid crystal is 3.68%, and the atomic percentage of Si in the silane carbon dots is 21.67%. The calculated atomic ratio of carbon dots to triethyl 1,3,5-benzenedric acid single crystal is approximately 1:6.

[0052] Example 2

[0053] A method for preparing a silane carbon dot / crystal hybrid material includes the following steps:

[0054] Step S1: Add 1g of 1,3,5-benzenetricarboxylic acid to 10ml of ethanol and dissolve it thoroughly on a magnetic stirrer. Add 10ml of vinyltriethoxysilane and stir to mix thoroughly.

[0055] Step S2: Transfer the precursor solution to an 80 ml polytetrafluoroethylene-lined autoclave, place it in a forced-air drying oven, maintain it at 180°C under heating for 12 h, and then cool it to room temperature (about 4 h) at a cooling rate of 0.75°C / min.

[0056] Step S3: After opening the reaction vessel, remove the liquid, take out the solid, wash with ethanol, and dissolve it in the ethanol solution by heating. Then cool and recrystallize, with the cooling rate as in step S2, to obtain the silane carbon dot / crystal hybrid material.

[0057] Figure 6A scanning electron microscope (SEM) image of the silane carbon dot / triethyl 1,3,5-phenyltricarboxylate hybrid crystal prepared in Example 2 is shown. The image shows a size of 100 μm and an average carbon dot diameter of 8.4 nm. The silane carbon dot / triethyl 1,3,5-phenyltricarboxylate hybrid crystal prepared according to Example 2 exhibits a smaller size and needle-like ends. This is attributed to the faster cooling rate, resulting in an increased number of nuclei and reduced crystal growth.

[0058] The fluorescence emission spectrum of the silane carbon dot / triethyl 1,3,5-benzenetricarboxylate hybrid crystal did not show a blue shift compared to Example 1, and the coverage width did not change significantly.

[0059] Example 3

[0060] A method for preparing a silane carbon dot / crystal hybrid material includes the following steps:

[0061] Step S1: Add 1g of 1,3,5-benzenetricarboxylic acid to 10ml of ethanol and dissolve it thoroughly on a magnetic stirrer. Add 10ml of vinyltriethoxysilane and stir to mix thoroughly.

[0062] Step S2: Transfer the precursor solution to an 80 ml polytetrafluoroethylene-lined autoclave, place it in a forced-air drying oven, maintain it at 160°C under heating for 12 h, and then cool it to room temperature at a cooling rate of 0.25°C / min.

[0063] Step S3: After opening the reaction vessel, remove the liquid, take out the solid, wash with ethanol, and dissolve it in the ethanol solution by heating. Then cool and recrystallize, with the cooling rate as in step S2, to obtain the silane carbon dot / crystal hybrid material.

[0064] The fluorescence emission spectrum of the silane carbon dot / triethyl 1,3,5-benzenetricarboxylate hybrid crystal showed a blue shift of about 20 nm compared to Example 1, and the coverage width decreased to about 280 nm.

[0065] Example 4

[0066] A method for preparing a silane carbon dot / crystal hybrid material includes the following steps:

[0067] Step S1: Add 1g of 1,3,5-benzenetricarboxylic acid to 10ml of ethanol and dissolve it thoroughly on a magnetic stirrer. Add 5ml of vinyltriethoxysilane and stir to mix thoroughly.

[0068] Step S2: Transfer the precursor solution to an 80 ml polytetrafluoroethylene-lined autoclave, place it in a forced-air drying oven, maintain it at 180°C for 12 h under heating, and then cool it to room temperature at a cooling rate of 0.25°C / min.

[0069] Step S3: After opening the reaction vessel, remove the liquid, take out the solid, wash with ethanol, and dissolve it in the ethanol solution by heating. Then cool and recrystallize, with the cooling rate as in step S2, to obtain the silane carbon dot / crystal hybrid material.

[0070] The fluorescence emission spectrum of the silane carbon dot / triethyl 1,3,5-benzenetricarboxylate hybrid crystal prepared according to Example 3 showed a blue shift of about 15 nm compared to Example 1, and the coverage width decreased to 290 nm.

[0071] Example 5

[0072] A method for preparing a silane carbon dot / crystal hybrid material includes the following steps:

[0073] Step S1: Add 1g of 1,3,5-benzenetricarboxylic acid to 10ml of ethanol and dissolve it thoroughly on a magnetic stirrer. Add 10ml of vinyltriethoxysilane and stir to mix thoroughly.

[0074] Step S2: Transfer the precursor solution to an 80 ml polytetrafluoroethylene-lined autoclave, place it in a forced-air drying oven, maintain it at 180°C under heating for 16 h, and then cool it to room temperature at a cooling rate of 0.25°C / min.

[0075] Step S3: After opening the reaction vessel, remove the liquid, take out the solid, wash with ethanol, and dissolve it in the ethanol solution by heating. Then cool and recrystallize, with the cooling rate as in step S2, to obtain the silane carbon dot / crystal hybrid material.

[0076] The fluorescence emission spectrum of the silane carbon dot / triethyl 1,3,5-benzenetricarboxylate hybrid crystal prepared according to Example 3 is about 10 nm redder than that of Example 1, and the coverage width is reduced to 300 nm.

[0077] Example 6

[0078] A method for preparing a silane carbon dot / crystal hybrid material includes the following steps:

[0079] Step S1: Add 1g of 1,3,5-benzenetricarboxylic acid to 10ml of ethanol and dissolve it completely on a magnetic stirrer. Add 10ml of ethyl silicate and stir to mix thoroughly.

[0080] Step S2: Transfer the precursor solution to an 80 ml polytetrafluoroethylene-lined autoclave, place it in a forced-air drying oven, maintain it at 180°C for 12 h under heating, and then cool it to room temperature at a cooling rate of 0.25°C / min.

[0081] Step S3: After opening the reaction vessel, remove the liquid, take out the solid, wash with ethanol, and dissolve it in the ethanol solution by heating. Then cool and recrystallize, with the cooling rate as in step S2, to obtain the silane carbon dot / crystal hybrid material.

[0082] The fluorescence emission spectrum of the silane carbon dot / triethyl 1,3,5-benzenetricarboxylate hybrid crystal prepared according to Example 3 showed a blue shift of about 20 nm compared to Example 1, and the coverage width decreased to 180 nm.

[0083] Comparative Example 1

[0084] A method for preparing a silane carbon dot / crystal hybrid material includes the following steps:

[0085] Step S1: Dissolve and mix 10 ml of vinyltriethoxysilane and 10 ml of anhydrous ethanol thoroughly.

[0086] Step S2: Transfer the precursor solution to an 80ml polytetrafluoroethylene-lined autoclave, place it in a forced-air drying oven, maintain it at 180℃ for 12h under heating, and cool it to room temperature at a cooling rate of 0.25℃ / min.

[0087] Step S3: Take out the liquid, concentrate it by rotary evaporation, and purify it by column chromatography to obtain silane carbon dots.

[0088] Figure 7 The image shows a transmission electron microscope (TEM) image of the silane carbon dots prepared in Comparative Example 1, with the inset showing a high-magnification TEM image of the silane carbon dots prepared in Comparative Example 1. The images show that the product is uniformly dispersed and of uniform size, with its lattice fringes corresponding to the (1 0 0) crystal plane of graphite. It is also evident that no triethyl 1,3,5-phenyltricarboxylate crystals are formed in the product, and therefore solid-state fluorescence or laser emission cannot be achieved.

[0089] Comparative Example 2

[0090] A method for preparing a silane carbon dot / crystal hybrid material includes the following steps:

[0091] Step S1: Dissolve and mix 1g of 1,3,5-benzenetricarboxylic acid, 10ml of vinyltriethoxysilane, and 10ml of anhydrous ethanol thoroughly.

[0092] Step S2: Transfer the precursor solution to an 80 ml polytetrafluoroethylene-lined autoclave, place it in a forced-air drying oven, maintain it at 60°C for 12 h under heating, and then rapidly cool it to room temperature (about 4 h) at a cooling rate of 0.75°C / min.

[0093] Step S3: After opening the reactor, remove the liquid, take out the solid, wash with ethanol, and heat to dissolve in the ethanol solution. Cool and recrystallize, with the cooling rate as in step S2. Since the carbon dot formation temperature cannot be reached, carbon dot / crystal hybrid materials with fluorescence emission or laser emission cannot be formed.

[0094] Comparative Example 3

[0095] A method for preparing a silane carbon dot / crystal hybrid material includes the following steps:

[0096] Step S1: Mix 1g of 1,3,5-benzenetricarboxylic acid with 10ml of vinyltriethoxysilane thoroughly.

[0097] Step S2: Transfer the precursor solution to an 80 ml polytetrafluoroethylene-lined autoclave, place it in a forced-air drying oven, maintain it at 180°C under heating for 0.2 h, and then slowly cool it to room temperature (about 12 h).

[0098] Step S3: After opening the reaction vessel, remove the liquid, take out the solid, wash with ethanol solution, and dissolve it in ethanol solution by heating. Then cool and recrystallize, with the cooling rate as in step S2. The obtained product cannot form 1,3,5-triethyl 1,3,5-phenyltricarboxylate crystals and cannot achieve solid-state fluorescence or laser emission.

[0099] Comparative Example 4

[0100] A method for preparing a silane carbon dot / crystal hybrid material includes the following steps:

[0101] Step S1: Dissolve and mix 1g of citric acid, 10ml of vinyltriethoxysilane and 10ml of anhydrous ethanol thoroughly.

[0102] Step S2: Transfer the precursor solution to an 80 ml polytetrafluoroethylene-lined autoclave, place it in a forced-air drying oven, maintain it at 180°C under heating for 12 h, and then slowly cool it to room temperature (approximately 12 h).

[0103] Step S3: The liquid is removed, concentrated by rotary evaporation, and purified by column chromatography. The silane carbon dot product does not form triethyl 1,3,5-benzenetricarboxylate crystals and cannot achieve solid-state fluorescence or laser emission.

[0104] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the implementation of the present invention. For those skilled in the art, other variations or modifications can be made based on the above description. It is impossible to exhaustively list all the implementation methods here. All obvious variations or modifications derived from the technical solutions of the present invention are still within the protection scope of the present invention.

Claims

1. A silane carbon dot / crystal hybrid material, characterized in that, It includes a single crystal of triethyl 1,3,5-benzenetricarboxylate, and carbon dots adsorbed on the surface of the single crystal; The particle size of the triethyl 1,3,5-phenyltricarboxylate single crystal is at or above the micrometer level; The average particle size of the carbon dots is 3-15 nm. The preparation of the silane carbon dot / crystal hybrid material includes the following steps: Dissolve 1,3,5-benzenetricarboxylic acid in ethanol, then add silane and mix well to obtain a precursor solution. The precursor solution was heated to react under dry conditions, and then cooled to room temperature after the reaction. The solids in the collected product were washed and recrystallized using an alcohol solvent to obtain the silane carbon dot / crystal hybrid material. The amount of 1,3,5-benzenetricarboxylic acid used is 0.5-2 g, the amount of ethanol used is 10-15 ml, and the amount of silane used is 5-15 ml. The reaction is carried out at a temperature of 150-180℃ for a time of 10-16 h. The cooling rate to room temperature is 0.125-0.75 °C / min.

2. The silane carbon dot / crystal hybrid material of claim 1, wherein, The carbon dots are adsorbed onto the surface of triethyl 1,3,5-benzenetricarboxylate single crystals by van der Waals forces.

3. The silane carbon dot / crystal hybrid material according to claim 1, characterized in that, The atomic ratio of the carbon dots to the triethyl 1,3,5-benzenetricarboxylate single crystal is 1:4 to 1:

8.

4. The silane carbon dot / crystal hybrid material according to claim 1, characterized in that, The carbon dots are derived from silane and ethanol after solvent heat treatment; The silane is selected from one or more of vinyltriethoxysilane, γ-aminopropyltriethoxysilane, γ-glycidoxypropyltrimethoxysilane, or N-(β-aminoethyl)-γ-aminopropylmethyldimethoxysilane.

5. The silane carbon dot / crystal hybrid material according to claim 1, characterized in that, The broadband laser of the silane carbon dot / crystal hybrid material covers a range of 315-600 nm under 265 nm ultraviolet light excitation.

6. The silane carbon dot / crystal hybrid material according to claim 1, characterized in that, The solid-state white light coverage range of the silane carbon dot / crystal hybrid material is 330-650 nm.

7. The method for preparing the silane carbon dot / crystal hybrid material according to any one of claims 1-6, characterized in that, Includes the following steps: Dissolve 1,3,5-benzenetricarboxylic acid in ethanol, then add silane and mix well to obtain a precursor solution. The precursor solution was heated to react under dry conditions, and then cooled to room temperature after the reaction. The solids in the collected product were washed and recrystallized using an alcohol solvent to obtain the silane carbon dot / crystal hybrid material. The amount of 1,3,5-benzenetricarboxylic acid used is 0.5-2 g, the amount of ethanol used is 10-15 ml, and the amount of silane used is 5-15 ml. The reaction is carried out at a temperature of 150-180℃ for a time of 10-16 h. The cooling rate to room temperature is 0.125-0.75 °C / min.

8. The application of the silane carbon dot / crystal hybrid material as described in any one of claims 1-6 in broadband laser emission.

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