ZnIn2S4/NH2-MIL-125(Ti) composite visible-light catalyst and preparation method thereof
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A NH2-MIL-125, znin2s4 technology, applied in the field of photocatalysis, can solve the problems of low quantum efficiency, less research on photocatalytic performance of MOF-based composites, and low photocatalytic activity
Inactive Publication Date: 2016-09-28
SHANGHAI UNIV
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Problems solved by technology
However, so far, there are still few reports on the preparation of MOF-based composites and their photocatalytic properties.
[0005] NH 2 -MIL-125(Ti) is a semiconductor material with a three-dimensional structure formed by oxygen-containing groups of metal Ti and organic ligands through coordination bonds. It can photolyze water to produce hydrogen under visible light conditions, but Its low quantum efficiency leads to low photocatalytic activity
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Embodiment 1
[0029] A. NH 2 - Preparation of MIL-125(Ti)
[0030] (1) Dissolve 2.201 g of 2-aminoterephthalic acid in a mixed solution of 36 ml of N, N-dimethylformamide and 4 ml of methanol at room temperature;
[0031] (2) Add 2.4 ml tetrabutyl titanate dropwise to the above solution;
[0032] (3) After stirring the above solution for 0.5 h, move it to a 100ml polytetrafluoroethylene-lined autoclave, and conduct a crystallization reaction at 150°C for 48 h;
[0033] (4) The obtained solid product was filtered, washed three times with N, N-dimethylformamide and ethanol, and dried under vacuum for 24 h to obtain NH 2 - MIL-125(Ti) catalyst.
[0034] B. ZnIn 2 S 4 / 40%NH 2 - Preparation of MIL-125(Ti) Composite Visible Light Catalyst
[0035] (1) The NH synthesized above 2 -MIL-125 (Ti) catalyst 0.169 g, ultrasonic dispersion in the mixed solution of 15 ml ethanol and 5 ml glycerol;
[0036] (2) Add 0.136 g ZnCl to the above mixture 2 and 0.586 gInCl 3 .4H 2 O, stirred for 1 h; ...
Embodiment 2
[0041] A. NH 2 - Preparation of MIL-125(Ti)
[0042] Operation process is like embodiment 1
[0043] B. ZnIn 2 S 4 / 20%NH 2 - Preparation of MIL-125(Ti) Composite Visible Light Catalyst
[0044] Operation process is except following difference, all the other are with embodiment 1
[0045] The above synthesized NH 2 - 0.085 g of MIL-125 (Ti) catalyst, ultrasonically dispersed in a mixed solution of 15 ml of ethanol and 5 ml of glycerol.
Embodiment 3
[0047] A. NH 2 - Preparation of MIL-125(Ti)
[0048] Operation process is like embodiment 1
[0049] B. ZnIn 2 S 4 / 30%NH 2 - Preparation of MIL-125(Ti) Composite Visible Light Catalyst
[0050] Operation process is except following difference, all the other are with embodiment 1
[0051] The above synthesized NH 2 - 0.127 g of MIL-125 (Ti) catalyst, ultrasonically dispersed in a mixed solution of 15 ml of ethanol and 5 ml of glycerol.
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Abstract
The invention relates to a novel ZnIn2S4 / NH2-MIL-125(Ti) composite visible-light catalyst and belongs to the technical field of photocatalysis. The novel ZnIn2S4 / NH2-MIL-125(Ti) composite visible-light catalyst is characterized in that ZnIn2S4 is nanosheet-shaped and is uniformly distributed on the surface of lumpy NH2-MIL-125(Ti), and the mass percent of the NH2-MIL-125(Ti) is 20.0% to 6.0%. A preparation method comprises the steps: (1) dissolving a certain amount of tetrabutyl titanate and 2-amino terephthalic acid in a mixture solution of N,N-dimethylformamide and methanol, and carrying out a crystallizing reaction for 48 hours in an autoclave at the temperature of 150 DEG C, so as to obtain the NH2-MIL-125(Ti); (2) dispersing the synthesized NH2-MIL-125(Ti) into a certain volume of ethanol in an ultrasonic dispersion manner, then, sequentially adding a certain amount of propanetriol, indium chloride, zinc chloride and thioacetamide into the dispersion while carrying out stirring, carrying out a crystallizing reaction for 10 hours in an autoclave at the temperature of 180 DEG C to 200 DEG C so as to obtain a solid product, and subjecting the obtained solid product to filtrating, washing and drying, thereby obtaining the ZnIn2S4 / NH2-MIL-125(Ti) composite visible-light catalyst. The preparation method of the composite visible-light catalyst is environmentally-friendly and is simple in process. The prepared composite catalyst has very high visible-light catalytic activity and has a potential application value in photocatalytic hydrogen production using solar energy.
Description
technical field [0001] The present invention relates to a kind of ZnIn 2 S 4 / NH 2 -MIL-125 (Ti) composite visible light catalyst and preparation method thereof, belonging to the field of photocatalysis technology. Background technique [0002] The human demand for energy is increasing, and it is imminent to find new energy sources. Hydrogen energy has become a future clean energy alternative to fossil fuels due to its high energy and clean characteristics. Since 1972, Fujishima et al. have used TiO 2 Since single crystal electrodes realized photocatalytic water splitting (A. Fujishima and K. Honda, Nature ,1972, 238: 37-38), photocatalytic water splitting for hydrogen production has received extensive attention from various countries. But TiO 2 It can only absorb ultraviolet light which accounts for 3%-5% of the total sunlight, and its solar energy utilization rate is low, so it is difficult for industrial application. Since visible light accounts for about 45% of t...
Claims
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