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a mos 2 @cro x /la,al-srtio 3 /coooh photocatalyst and preparation method

A photocatalyst and compound technology, applied in the field of photocatalytic nanomaterial synthesis, can solve the problems of high price, scarce precious metal catalyst reserves, low photocatalytic pure water splitting efficiency, etc., and achieve low price, good catalytic activity and stability, The effect of stabilizing the structure

Active Publication Date: 2021-11-05
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Due to the scarcity of precious metal catalysts, high price and large work function, the reverse reaction of oxygen reduction in photocatalytic water splitting is more obvious, resulting in low efficiency of photocatalytic pure water splitting.

Method used

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  • a mos <sub>2</sub> @cro <sub>x</sub> /la,al-srtio <sub>3</sub> /coooh photocatalyst and preparation method
  • a mos <sub>2</sub> @cro <sub>x</sub> /la,al-srtio <sub>3</sub> /coooh photocatalyst and preparation method
  • a mos <sub>2</sub> @cro <sub>x</sub> /la,al-srtio <sub>3</sub> /coooh photocatalyst and preparation method

Examples

Experimental program
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Effect test

Embodiment 1

[0026] A kind of MoS 2 @CrO x / La,Al-SrTiO 3 The preparation method of / CoOOH photocatalyst comprises the following steps:

[0027] Weigh 0.008mol of lanthanum nitrate, 0.008mol of aluminum nitrate and 0.084mol of SrTiO 3 , mixed and ground in an agate mortar for 1 h, put the ground mixture in a ball mill, ball milled for 10 h at 4000 rpm, and then added 1 mol of SrCl 2Continue ball milling for 1h. The ball-milled mixture was separated by sieving, placed in a muffle furnace, and kept at 800°C for 12 hours. After taking it out, use a large amount of deionized water to filter and wash, and then place the material in a drying oven at 80 degrees to dry overnight to obtain La,Al-SrTiO 3 nanoparticles. La,Al-SrTiO 3 With a mass ratio of 2.0wt% (NH 4 ) 2 MoS 4 MoS formed after pyrolytic exfoliation at 400 degrees 2 Nanosheets and chromium salts were uniformly ground and mixed for 4 hours, and kept at 500 degrees for 4 hours under the protection of an inert gas to obtain MoS...

Embodiment 2

[0030] A kind of MoS 2 @CrO x / La,Al-SrTiO 3 The preparation method of / CoOOH photocatalyst comprises the following steps:

[0031] Weigh 0.005mol of lanthanum nitrate, 0.005mol of aluminum nitrate and 0.09mol of SrTiO 3 , mixed and ground in an agate mortar for 1 h, put the ground mixture in a ball mill, ball milled for 24 h at 4000 rpm, and then added 1 mol of SrCl 2 Continue ball milling for 1h. The ball-milled mixture was separated by sieving, placed in a muffle furnace, and kept at 1000°C for 8 hours. After taking it out, use a large amount of deionized water to filter and wash, and then place the material in a drying oven at 80 degrees to dry overnight to obtain La,Al-SrTiO 3 nanocatalyst materials. La,Al-SrTiO 3 With a mass ratio of 1.0wt% (NH 4 ) 2 MoS 4 MoS formed after pyrolytic exfoliation at 400 degrees 2 Nanosheets and chromium salts were uniformly ground and mixed for 4 hours, and kept at 400 degrees for 2 hours under the protection of an inert gas to o...

Embodiment 3

[0033] A kind of MoS 2 @CrO x / La,Al-SrTiO 3 The preparation method of / CoOOH photocatalyst comprises the following steps:

[0034] Weigh 0.001mol of lanthanum nitrate, 0.001mol of aluminum nitrate and 0.098mol of SrTiO 3 , mixed and ground in an agate mortar for 1 h, put the ground mixture in a ball mill, ball milled for 24 h at 4000 rpm, and then added 1 mol of SrCl 2 Continue ball milling for 1h. The ball-milled mixture was separated by sieving, placed in a muffle furnace, and kept at 800°C for 4 hours. After taking it out, use a large amount of deionized water to filter and wash, and then place the material in a drying oven at 80 degrees to dry overnight to obtain La,Al-SrTiO 3 nanocatalyst materials. La,Al-SrTiO 3 With the mass ratio of 0.5wt% (NH 4 ) 2 MoS 4 MoS formed after pyrolytic exfoliation at 400 degrees 2 Nanosheets and chromium salts were uniformly ground and mixed for 4 hours, and kept at 500 degrees for 4 hours under the protection of an inert gas to...

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Abstract

The invention discloses a MoS 2 @CrO x / La,Al‑SrTiO 3 / CoOOH photocatalyst and its preparation method belong to the technical field of synthesis of photocatalytic nanomaterials, the catalyst can realize the photocatalytic reaction under ultraviolet-visible light, has good catalytic activity and stability in the photocatalytic reaction, and is prepared The process is simple, the reaction conditions are mild, and the reagents used are cheap. The invention relates to a novel photocatalytic nano material La, Al double metal ion co-doped SrTiO 3 , and loaded with MoS 2 @CrO x It is a hydrogen evolution co-catalyst, CoOOH is an oxygen evolution co-catalyst, La and Al molar proportions are 1%~10% respectively, and different MoS with a co-catalyst loading of 0.5wt%‑5wt% 2 @CrO x / La,Al‑SrTiO 3 / CoOOH composite nano photocatalytic materials.

Description

technical field [0001] The invention belongs to the technical field of synthesis of photocatalytic nanomaterials, in particular to a kind of MoS 2 @CrO x / La,Al-SrTiO 3 / CoOOH photocatalyst and preparation method. Background technique [0002] Semiconductor photocatalysis can promote many types of difficult chemical reactions under mild conditions, such as photocatalytic degradation of organic matter, photocatalytic synthesis of ammonia, methanol and other high value-added chemical raw materials, photocatalytic water decomposition, etc., which is considered to be a The key technology for converting photon energy into chemical energy. Due to its high combustion calorific value and environmental friendliness, hydrogen is considered as a clean alternative energy source. 2 mol of water can be decomposed to generate 2 mol of hydrogen and 1 mol of oxygen, which can be converted into When storable hydrogen energy is available, photocatalytic pure water splitting technology may ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J27/051
CPCB01J27/0515B01J35/39
Inventor 常焜秦亚雷韩文君林惠文徐旺
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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