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Simple preparation method of Z-type heterojunction photocatalytic material

A technology of heterojunction and composite nanomaterials, which is applied in the field of photocatalysis, can solve the problems of narrow light absorption range, high recombination rate of photogenerated holes and electrons, and low photocatalytic efficiency, and achieve the effect of high safety and low cost

Pending Publication Date: 2022-07-19
TIANJIN UNIVERSITY OF TECHNOLOGY
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However a single g-C 3 N 4 The high recombination rate of photogenerated holes and electrons, large internal resistance, narrow light absorption range and other defects make its photocatalytic efficiency low

Method used

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  • Simple preparation method of Z-type heterojunction photocatalytic material

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Embodiment 1

[0027] The present invention provides a kind of composite nanomaterial, and its preparation method comprises the following steps:

[0028] 1) Disperse 6g of urea into ultrapure water to form a solution A with a concentration of 0.1mol / L;

[0029] 2) Rotary steam the solution A, and calcine it in a muffle furnace at 500 °C for 2 h to obtain g-C 3 N 4 powder A1;

[0030] 3) Disperse cupric chloride dihydrate into ultrapure water to form solution B with a solution of 0.1 mol / L;

[0031] 4) disperse sodium hydroxide into ultrapure water to form solution C with a concentration of 1mol / L;

[0032] 5) Disperse hydroxylamine hydrochloride in ultrapure water to form solution D with a concentration of 0.1mol / L

[0033] 6) Disperse A1 into ultrapure water to form suspension A2;

[0034] 7) Add 5 mL of B and 870 mg of sodium dodecyl sulfate to suspension A2, heat and keep the temperature at 35°C, stir for 40 min until the sodium dodecyl sulfate is completely dissolved, add 1.8 mL of ...

Embodiment 2

[0042] The present invention also uses the Cu prepared above 2 O@g-C 3 N 4 for photocatalytic reduction of CO 2 Methanol is produced, and water is oxidized to oxygen at the same time. The specific method is as follows:

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Abstract

The invention discloses a simple preparation method of a Z-type heterojunction composite material. Two semiconductors including Cu2O nanocrystals and g-C3N4 nanosheets are compounded to form a Z-type heterojunction, water is used as a proton source, efficient reduction of carbon dioxide into methanol is realized, and oxygen is generated at the same time. The synthesis method is simple, and water is used as a proton source without other sacrificial agents, so that the cost is effectively reduced, and good application prospects are achieved.

Description

technical field [0001] The invention belongs to the technical field of photocatalysis, and in particular relates to a simple preparation method of a Z-type heterojunction material. Background technique [0002] The energy crisis and increasingly serious environmental problems need to be solved urgently. The conversion and utilization of solar energy is expected to be an effective way to solve energy and environmental problems. Over the past few decades, photocatalytic reduction of carbon dioxide to liquid fuels using semiconductors has been recognized as an ideal way to convert solar energy into chemical energy. However, it is still challenging to achieve high-efficiency conversion of carbon dioxide to methanol using water as the proton source in the photocatalytic carbon dioxide system. [0003] g-C 3 N 4 As an attractive conjugated polymer, it has received extensive attention in the field of solar energy conversion due to its low cost and visible light response. Howeve...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/24C07C29/154C07C31/04
CPCB01J27/24C07C29/154B01J35/39C07C31/04
Inventor 张志明田志远姚爽
Owner TIANJIN UNIVERSITY OF TECHNOLOGY
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