Titanium dioxide-boron modified carbon nitride catalyst and preparation method thereof

A titanium dioxide and boron modification technology, applied in physical/chemical process catalysts, hydrocarbon production from carbon oxides, chemical instruments and methods, etc., can solve problems such as poor catalytic effect, low utilization rate of sunlight, and small specific surface area. Achieve the effect of increasing the specific surface area, high utilization rate of visible light, and improving the separation of charges

Inactive Publication Date: 2016-01-06
HEILONGJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The present invention aims to solve the problems of relatively small specific surface area, low utilization rate of sunlight, and poor catalytic effect of photocatalyst materials prepared in the prior art, and provide a preparation method of highly active titanium dioxide-boron modified carbon nitride photocatalyst

Method used

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  • Titanium dioxide-boron modified carbon nitride catalyst and preparation method thereof
  • Titanium dioxide-boron modified carbon nitride catalyst and preparation method thereof
  • Titanium dioxide-boron modified carbon nitride catalyst and preparation method thereof

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specific Embodiment approach 1

[0034] Specific embodiment one: the preparation method of highly active titanium dioxide-boron modified carbon nitride photocatalyst in this embodiment is specifically completed according to the following steps:

[0035] 1. Preparation of boron carbon nitrogen aqueous solution: under the condition of temperature of 25-35°C, completely dissolve the boron salt in deionized water, and configure it into an aqueous solution of boron salt with a molar concentration of 0.001mol / L-0.1mol / L, and stir Stir at a speed of 100r / min to 300r / min for 10min to 30min, then add 1-3g of carbon and nitrogen sources and continue stirring to obtain an aqueous solution of boron, carbon and nitrogen; 2. Preparation of boron-modified carbon nitride: the above step 1 The boron carbon nitrogen aqueous solution is placed in an electric blast drying oven at 80-120°C and evaporated to dryness to obtain a boron carbon nitrogen precursor powder. After the precursor is roasted in a muffle furnace at 200-400°C f...

specific Embodiment approach 2

[0040] Specific embodiment two: the difference between this embodiment and specific embodiment one or two is: the boron salt described in step one is 1-butyl-3-methylimidazolium tetrafluoroborate, boron trifluoride Diethyl ether, triphenylphosphineborane, tetrabutylammonium borohydride, sodium triacetoxyborohydride and 1,3,5-trimethyl-4-(4,4,5,5-tetramethyl-1 , 3,2-dioxaborolan-2-yl)-1H-pyrazole or a mixture of several of them. Others are the same as those in Embodiment 1 or 2.

specific Embodiment approach 3

[0041] Embodiment 3: This embodiment is different from Embodiment 1 in that the carbon and nitrogen source described in step 1 is urea, melamine and dicyandiamide or a mixture of several of them. Others are the same as the first embodiment.

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Abstract

The invention relates to a preparation method of a high-activity titanium dioxide-boron modified carbon nitride catalyst and aims to solve the problems of low visible light utilization rate, serious charge recombination, difficulty in hole capture and poor light reducing capacity of a photocatalyst material prepared in the prior art. The preparation method of the high-activity titanium dioxide-boron modified carbon nitride catalyst is prepared in specific steps as follows: step one, preparation of a boron modified carbon nitride precursor solution; step two, preparation of boron modified carbon nitride; step three, preparation of titanium dioxide-boron modified carbon nitride composite, and the titanium dioxide-boron modified carbon nitride is obtained.

Description

technical field [0001] The invention relates to a preparation method of a highly active titanium dioxide-boron modified carbon nitride photocatalyst. Background technique [0002] Photocatalytic technology uses solar energy resources and semiconductor photoelectric effect to generate reductive electrons and oxidative holes to carry out redox reactions respectively. From a thermodynamic point of view, the photogenerated electrons produced by suitable semiconductor materials can have a high reduction ability, and can reduce protons in water to hydrogen, or reduce carbon dioxide to methane, methanol and other solar fuels under the condition of water as a co-catalyst . However, semiconductor photocatalyst materials are the core of photocatalysis. In the past forty years, people have been trying to find an efficient, cheap and stable photocatalyst for photolysis of water to produce hydrogen and reduce carbon dioxide. Carbon nitride is a new type of nano-photocatalytic material ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/24C01B3/04C07C1/02C07C9/04
CPCY02E60/36
Inventor 井立强曲阳F.拉孜齐李志君张旭良
Owner HEILONGJIANG UNIV
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