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MOF-based MoP-Cu3P transition metal phosphide heterojunction photocatalyst

A transition metal, photocatalyst technology, applied in physical/chemical process catalysts, non-metallic elements, chemical/physical processes, etc., can solve problems such as recombination and low hydrogen evolution efficiency, and achieve the effect of enhancing service life

Inactive Publication Date: 2020-10-13
ZHEJIANG NIRUAN NEW MATERIAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Aiming at the problems of low hydrogen evolution efficiency of existing hydrogen evolution photocatalysts and carrier recombination in the catalytic process of a single catalyst, the present invention provides a simple, convenient and high hydrogen evolution rate MOF-based MoP-Cu 3 P transition metal phosphide heterojunction photocatalyst

Method used

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  • MOF-based MoP-Cu3P transition metal phosphide heterojunction photocatalyst
  • MOF-based MoP-Cu3P transition metal phosphide heterojunction photocatalyst
  • MOF-based MoP-Cu3P transition metal phosphide heterojunction photocatalyst

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] 1) 3.2g of copper acetate monohydrate (Cu 2+ ) and 4.8 g of L-glutamic acid were dissolved in 50 mL of deionized water, stirred at room temperature for 3 h to obtain a clear solution.

[0034] 2) 2.5 g of 1,3,5-benzenetricarboxylic acid (BTC) was dissolved in 50 mL of ethanol, and stirred at room temperature for 3 h to obtain a clear solution.

[0035] 3) Add the clarified solution in step 2) to the clarified solution A in step 1) and stir vigorously for 28 hours;

[0036] 4) The product of step 3) was centrifuged, washed three times with ethanol and once with deionized (DI) water, and dried the precipitate to obtain the MOFNENU-5 derivative.

[0037] 5) Step 4) put the product at the gas outlet of the dual-temperature zone tube furnace, put 4.6g of sodium dihydrogen phosphate at the gas inlet, pump the tube furnace pressure to 100Pa, pass Ar gas, and the heating temperature at the gas inlet is 300°C, the heating temperature at the gas outlet is 680°C, and the reactio...

Embodiment 2

[0040] 1) 3.2g of copper acetate monohydrate (Cu 2+ ) and 4.8 g of L-glutamic acid were dissolved in 50 mL of deionized water, stirred at room temperature for 3 h to obtain a clear solution.

[0041] 2) 2.5 g of 1,3,5-benzenetricarboxylic acid (BTC) was dissolved in 50 mL of ethanol, and stirred at room temperature for 3 h to obtain a clear solution.

[0042] 3) Add the clarified solution in step 2) to the clarified solution A in step 1) and stir vigorously for 28 hours;

[0043] 4) The product of step 3) was centrifuged, washed three times with ethanol and once with deionized (DI) water, and dried the precipitate to obtain the MOFNENU-5 derivative.

[0044] 5) Step 4) The product is placed at the gas outlet of the dual temperature zone tube furnace, 4.6g of sodium dihydrogen phosphate is placed at the intake end, the pressure of the tube furnace is pumped to 100Pa, and Ar gas is passed through the dual temperature zone tube furnace The temperature at the inlet end is raised...

Embodiment 3

[0047] 1) 3.2g of phosphomolybdic acid hydrate (PMo12), 3.2g of copper acetate monohydrate (Cu 2+ ) and 4.8 g of L-glutamic acid were dissolved in 50 mL of deionized water and 4.8 g of L-glutamic acid was dissolved in 50 mL of deionized water, and stirred at room temperature for 3 h to obtain a clear solution.

[0048] 2) 2.5 g of 1,3,5-benzenetricarboxylic acid (BTC) was dissolved in 50 mL of ethanol, and stirred at room temperature for 3 h to obtain a clear solution.

[0049] 3) Add the clarified solution in step 2) to the clarified solution A in step 1) and stir vigorously for 28 hours;

[0050] 4) The product of step 3) was centrifuged, washed three times with ethanol and once with deionized (DI) water, and dried the precipitate to obtain the MOF NENU-5 derivative.

[0051] 5) The product of step 4) was ground and mixed with 4.6 g of sodium dihydrogen phosphate, synthesized at a high temperature under 100 Pa pressure, and the temperature at the inlet end of the dual-tempe...

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Abstract

The invention relates to an MOF-based MoP-Cu3P transition metal phosphide heterojunction photocatalyst and a preparation method of the MOF-based MoP-Cu3P transition metal phosphide heterojunction photocatalyst. The MOF-based MoP-Cu3P transition metal phosphide heterojunction catalyst is prepared by a one-step method, MOF is a metal organic framework material, and a highly dispersed MOF-based MoP-Cu3P transition metal phosphide nano material is prepared by taking a derivative of MOF as a precursor. The MoP-Cu3P transition metal phosphide composite material is synthesized by carrying out a high-temperature reaction on a derivative of MOF and sodium dihydrogen phosphate, high metal conductivity, good H+ transmission capacity and excellent activity of MoP are used as cocatalysts to enhance, absorb and accelerate semiconductor carrier separation to improve hydrogen evolution efficiency, Cu3P has good photoelectric properties and is compounded with MoP metal phosphide; the problem that the hydrogen evolution conversion efficiency is seriously reduced due to carrier recombination is solved; in addition, a Schottky junction is established by utilizing close contact between MoP and Cu3P, and separation and transfer of carriers are accelerated.

Description

technical field [0001] The invention belongs to the field of environmentally friendly photocatalytic hydrogen production, and specifically relates to a MOF-based MoP-Cu 3 P transition metal phosphide heterojunction photocatalysts. Background technique [0002] The excessive consumption of fossil fuels has caused a series of energy and environmental problems. Hydrogen, as a clean and renewable energy with high calorific value, may replace fossil fuels in the future. Photocatalytic water splitting is considered to be the most promising method to obtain hydrogen, and so far, many efficient photocatalysts with important roles have been developed. Among them, transition metal phosphides have good electrical conductivity and excellent catalytic activity, and have been proved to be excellent catalysts for hydrogen evolution reaction (HER), such as Ni 2 P, CoP, Co 2 P, FeP, Cu 3 P, WP and MoP. Among them, Cu 3 P has good photoelectric properties and is rich in resources, so it...

Claims

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Application Information

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IPC IPC(8): B01J27/19C01B3/04
CPCB01J27/19C01B3/042C01B2203/0277B01J35/39Y02E60/36
Inventor 曹江行
Owner ZHEJIANG NIRUAN NEW MATERIAL CO LTD
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