Preparation method of Ag/g-C3N4 composite visible light catalyst
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A technology of g-c3n4 and visible light, applied in the field of photocatalysis, can solve the problems of large particle size of Ag particles and complicated preparation process, and achieve the effect of low production cost, good performance and widening the absorption range of visible light.
Inactive Publication Date: 2018-09-07
BEIJING UNIV OF CHEM TECH
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However, the Ag particle size obtained by this method is relatively large, and the preparation process is relatively complicated.
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Embodiment 1
[0020] 5%Ag / g-C 3 N 4
[0021] (1) Weigh 1g of g-C 3 N 4 Added to 50mL of ethanol solvent; ultrasonic 30min.
[0022] (2) Add 0.045mol / L AgNO dropwise 3 Solution 10mL, stirred for 30min;
[0023] (3) Pour the prepared solution into a reaction kettle, heat at 120° C. for 3 hours, cool to room temperature, wash with deionized water and absolute ethanol, dry and grind. Obtain light gray 5%Ag / g-C 3 N 4 Composite visible light catalyst.
Embodiment 2
[0025] 10%Ag / g-C 3 N 4
[0026] (1) Weigh 1g of g-C 3 N 4 Added to 50mL of ethanol solvent; ultrasonic 30min.
[0027] (2) Add 0.045mol / L AgNO dropwise 3 Solution 20mL, stirred for 30min;
[0028] (3) Pour the prepared solution into a reaction kettle, heat at 120° C. for 3 hours, cool to room temperature, wash with deionized water and absolute ethanol, dry and grind. Get light gray 10%Ag / g-C 3 N 4 Composite visible light catalyst.
Embodiment 3
[0030] 15%Ag / g-C 3 N 4
[0031] (1) Weigh 1g of g-C 3 N 4 Added to 50mL of ethanol solvent; ultrasonic 30min.
[0032] (2) Add 0.045mol / L AgNO dropwise 3 Solution 30mL, stirred for 30min;
[0033] (3) Pour the prepared solution into a reaction kettle, heat at 120° C. for 3 hours, cool to room temperature, wash with deionized water and absolute ethanol, dry and grind. Get light gray 15%Ag / g-C 3 N 4 Composite visible light catalyst.
[0034] 20%Ag / g-C 3 N 4
[0035] (1) Weigh 1g of g-C 3 N 4 Added to 50mL of ethanol solvent; ultrasonic 30min.
[0036] (2) Add 0.045mol / L AgNO dropwise 3 Solution 40mL, stirred for 30min;
[0037] (3) Pour the prepared solution into a reaction kettle, heat at 120° C. for 3 h, cool to room temperature, wash with deionized water and absolute ethanol, dry and grind. Obtain light gray 20%Ag / g-C 3 N 4 Composite visible light catalyst.
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Abstract
The invention relates to a preparation method of a Ag / g-C3N4 composite visible light catalyst. The steps comprise: (1) placing melamine as a raw material for g-C3N4 into a crucible, heating in a muffle furnace at a rate of 10 DEG C / min to a temperature of 550 DEG C, maintaining for 4 h, and naturally cooling to a room temperature to obtain a pale yellow solid; (2) weighing a certain amount of theg-C3N4, adding a certain amount of an ethanol or ethylene glycol solvent, stirring, and carrying out ultrasound for 30 min; (3) adding a 0.02-0.06 mol / L AgNO3 solution in a dropwise manner, and stirring for 30 min; and (4) poruing the solution into a reaction kettle, heating for 3-5 h at a temperature of 110-140 DEG C, cooling to a room temperature, washing with deionized water and absolute ethanol, drying, and grinding to obtain the pale gray Ag / g-C3N4 composite visible light catalyst. According to the present invention, the obtained visible light catalyst has strong visible light catalytic degradation activity on Rhodamine B; and the preparation process has characteristics of simpleness, easy control, easily available raw materials and low production cost.
Description
technical field [0001] The invention relates to a Ag / g-C with visible light activity 3 N 4 Preparation of composite visible photocatalysts. It belongs to the technical field of photocatalysis. Background technique [0002] With the rapid development of industrial technology, environmental pollution has become one of the serious problems threatening human survival and future development. The application of photocatalytic technology is considered to be an effective way to solve the problems of water and air pollution. g-C 3 N 4 As a new type of visible light-responsive photocatalyst, it has a unique electronic structure, narrow band gap and suitable energy band position, and has high thermal and chemical stability, but its response range to visible light is relatively small. Therefore, the preparation of highly efficient photocatalysts with visible light response is an important topic in the field of photocatalysis research. [0003] By solvothermal method in g-C 3 N ...
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