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Rod-like g-C3N4@SnIn4S8 composite photocatalyst and method for preparing same

A g-c3n4, composite light technology, applied in chemical instruments and methods, physical/chemical process catalysts, chemical/physical processes, etc., can solve the problems of long time, high synthesis temperature, fast electron and hole recombination, etc. The effect of reducing the recombination rate and easier separation

Active Publication Date: 2018-08-17
TAIZHOU VOCATIONAL & TECHN COLLEGE
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the preparation of SnIn 4 S 8 The method is generally hydrothermal method, high synthesis temperature, long time, high energy consumption, in addition, a single photocatalyst often has the disadvantages of photocorrosion, fast recombination of electrons and holes, etc.

Method used

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  • Rod-like g-C3N4@SnIn4S8 composite photocatalyst and method for preparing same
  • Rod-like g-C3N4@SnIn4S8 composite photocatalyst and method for preparing same
  • Rod-like g-C3N4@SnIn4S8 composite photocatalyst and method for preparing same

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Embodiment 1

[0032] The chemical reagents used in the present invention are all analytically pure, purchased from Aladdin Reagent Company, and the experimental water is deionized water. Specific steps are as follows:

[0033] (1) Preparation of pure g-C 3 N 4 : Weigh 30 g of urea and place it in a crucible, dry it in an oven at 80°C for 8 h, and stir once every 1 h to ensure that the urea is fully dried. Place in a muffle furnace, raise the temperature to 550°C at a rate of 10°C / min, and keep the temperature constant for 2 h. Cool to room temperature and grind to obtain a pale yellow solid (pure g-C 3 N 4 ).

[0034] (2) Preparation of g-C 3 N 4 @SnIn 4 S 8 Composite photocatalyst: 0.5559 g of g-C 3 N 4 powder (molecular weight: 92, 6.042 mmol) and 0.07012 g SnCl 4 • 5H 2 O (molecular weight: 350.60, 0.2 mmol) was dissolved in 80 mL of deionized water, and after sonication for 40 min, 0.2407 g of In(NO 3 ) 3 • 5H 2 O (molecular weight: 300.83, 0.8 mmol), 0.2341 g of C 2 H ...

Embodiment 2

[0037] The preparation method of embodiment 2 is identical with embodiment 1, just pure g-C 3 N 4 with SnIn 4 S 8 The mass ratio is set to different loading gradients, and photocatalysts with different loading ratios are prepared, which are changed to 10%, 20%, 40%, and 50% g-C 3 N 4 @SnIn 4 S 8 composite photocatalyst. X-ray diffraction pattern (XRD) as Image 6 As shown, g-C appeared in the composite sample 3 N 4 and SnIn 4 S 8 characteristic peaks, indicating that g-C 3 N 4 with SnIn 4 S 8 compounded successfully. At the same time, the corresponding g-C after compounding 3 N 4 The intensity of the diffraction peak (002) crystal plane decreases with the increase of the loading ratio, which is mainly due to the fact that the SnIn 4 S 8 The addition of SnIn makes the 4 S 8 Crystals covered in g-C 3 N 4 surface, inhibiting the g-C 3 N 4 growth, making g-C 3 N 4 The intensity of the diffraction peaks was significantly reduced. Compared Figure 4 It c...

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Abstract

The invention belongs to the technical field of photocatalysts, and particularly relates to a rod-like g-C3N4@SnIn4S8 composite photocatalyst and a method for preparing the same. The method for synthesizing the rod-like g-C3N4@SnIn4S8 composite photocatalyst by the aid of hydrothermal processes includes calcining urea at the high temperatures to obtain pure g-C3N4; weighing the g-C3N4, dissolvingcrystallized tin tetrachloride (SNCl4.5H2O) in deionized water, carrying out ultrasonic treatment, adding quantitative indium nitrate hydrate [In(NO3)3.5H2O] and thioacetamide (C2H5NS) into the deionized water, stirring the indium nitrate hydrate [In(NO3)3.5H2O], the thioacetamide (C2H5NS) and the deionized water to obtain mixtures, transferring the mixtures into a reaction kettle and keeping thetemperatures of the mixtures in a drying oven constant; carrying out negative-pressure suction filtration after reaction is completely carried out and washing and drying reaction products to obtain samples. The urea is a raw materials for the rod-like g-C3N4@SnIn4S8 composite photocatalyst. The rod-like g-C3N4@SnIn4S8 composite photocatalyst and the method have the advantages that the rod-like g-C3N4@SnIn4S8 composite photocatalyst prepared by the aid of the method is mainly applied to photocatalysis, gas adsorption and separation, chemical sensors and the like; the method is simple and is easy to operate, low in cost and free of pollution, and accordingly the rod-like g-C3N4@SnIn4S8 composite photocatalyst and the method have excellent application prospects in the technical field of environmental pollution control.

Description

technical field [0001] The invention belongs to the technical field of photocatalysts, in particular to a rod-shaped g-C 3 N 4 @SnIn 4 S 8 Composite photocatalyst and preparation method thereof. Background technique [0002] In recent years, with the increasing emphasis on environmental issues, semiconductor photocatalytic technology has been considered as one of the effective ways to deal with environmental pollution by researchers from various countries because of its low cost, high degradation efficiency and environmental friendliness. Carbon nitride (g-C 3 N 4 ) As a typical non-metallic semiconductor photocatalyst, its band gap is 2.7 eV, it can catalyze hydrogen evolution under visible light, and it can resist the corrosion of alkali and acid, and its structure and performance are easy to control. It has been used in the degradation of organic matter, electrolysis Aquatic hydrogen, hydrocarbon dyes and other research, but g-C 3 N 4 The light absorption performa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/24C02F1/30
CPCC02F1/30B01J27/24C02F2305/10B01J35/39
Inventor 王玉新毛晓妍汪翰阳金银秀陶雪芬张昕欣
Owner TAIZHOU VOCATIONAL & TECHN COLLEGE
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