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Application of transition metal sulfide-supported mn-cd-s solid solution in photocatalytic hydrogen production

A solid solution, photocatalyst technology, applied in the direction of physical/chemical process catalysts, non-metallic elements, chemical instruments and methods, etc., can solve the problem of composite catalysts or catalytic assistants, which are rarely studied, the composite rate is fast, and the photogenerated carrier migration rate Slow and other problems, to achieve the effect of excellent photocatalytic hydrogen production activity, simple conditions, and high commercial application prospects

Active Publication Date: 2019-12-17
SHANDONG UNIV
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Problems solved by technology

But Mn x CD 1-x S bulk still has the problems of slow migration rate of photogenerated carriers and fast recombination rate, but there are few researches on composite catalysts or catalytic promoters of Mn-Cd-S solid solution

Method used

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  • Application of transition metal sulfide-supported mn-cd-s solid solution in photocatalytic hydrogen production
  • Application of transition metal sulfide-supported mn-cd-s solid solution in photocatalytic hydrogen production
  • Application of transition metal sulfide-supported mn-cd-s solid solution in photocatalytic hydrogen production

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preparation example Construction

[0046] Disclosed in a specific embodiment of the present invention is XS / Mn 0.5 Cd 0.5 The preparation method of S(X=Mo, Cu, Pd) photocatalyst, the preparation method comprises: through photoreduction, in-situ loading in a way of transition metal sulfide XS(X=Mo, Cu, Pd) load to Mn 0.5 Cd 0.5 S solid solution.

[0047] Specifically, MoS 2 / Mn 0.5 Cd 0.5 S was prepared by photoreduction. Preferably, the photoreduction preparation method includes, Mn 0.5 Cd 0.5 S carrier dispersed in Na 2 S and Na 2 SO 3 to the mixture, and then add a certain amount of (NH 4 ) 2 MoS 4solution, stirred under light, the precipitate was separated and dried to obtain MoS 2 / Mn 0.5 Cd 0.5 S.

[0048] Cu x S / Mn 0.5 Cd 0.5 S was prepared by in situ loading method. Preferably, the method of in-situ loading includes, Mn 0.5 Cd 0.5 The S carrier was dispersed in water, and then a certain amount of Cu(NO 3 ) 2 The solution was stirred, and the precipitate was separated and dried t...

Embodiment 1

[0057] Photocatalytic material XS / Mn 0.5 Cd 0.5 The preparation method of S (X=Mo, Cu, Pd), concrete steps are as follows:

[0058] (1) Preparation of Mn by hydrothermal method 0.5 Cd 0.5 S: First, measure 70ml of water with a measuring cylinder and pour it into a 150ml beaker, and weigh 0.245g of Mn(CH 3 COO) 2 4H 2 O and 0.207g Cd(CH 3 COO) 2 2H 2 O, put it into the above-mentioned beaker filled with water and stir to form a uniform aqueous solution, then weigh 1.11g of L-cystine and add it to the above solution under stirring, adjust the pH to 10.5 with 6mol / L NaOH, stir for 30min and then pipette In a 100 ml reactor, react at 130°C for 10 hours. Then, after the reactor was naturally cooled to room temperature, the precipitate was washed with deionized water for 2-3 times during suction filtration and dried at 60°C to obtain Mn 0.5 Cd 0.5 S solid solution powder.

[0059] (2)MoS 2 / Mn 0.5 Cd 0.5 S was prepared by photoreduction. mn 0.5 Cd 0.5 S carrier dis...

Embodiment 2

[0065] Photocatalytic material XS / Mn 0.5 Cd 0.5 The preparation method of S (X=Mo, Cu, Pd), concrete steps are as follows:

[0066] (1) Preparation of Mn by hydrothermal method 0.5 Cd 0.5 S: First, measure 70ml of water with a measuring cylinder and pour it into a 150ml beaker, and weigh 0.245g of Mn(CH 3 COO) 2 4H 2 O and 0.207g Cd(CH 3 COO) 2 2H 2 O, put it into the above-mentioned beaker filled with water and stir to form a uniform aqueous solution, then weigh 1.11g of L-cystine and add it to the above solution under stirring, adjust the pH to 10.5 with 6mol / L NaOH, stir for 30min and then pipette In a 100 ml reactor, react at 130°C for 10 hours. Then, after the reactor was naturally cooled to room temperature, the precipitate was washed with deionized water for 2-3 times during suction filtration and dried at 60°C to obtain Mn 0.5 Cd 0.5 S solid solution powder.

[0067] (2) Preparation of transition metal sulfide supported Mn 0.5 CD 0.5 S photocatalyst:

[...

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Abstract

The invention discloses application of transition metal sulfide Mn-Cd-S-loaded solid solution in a photocatalysis hydrogen production aspect. A prepared XS / Mn0.5Cd0.5S(X=Mo, Cu, Pd) photocatalytic material has excellent photocatalysis hydrogen production activity; in addition, the hydrogen yield can respectively reach 3,940, 6,940 and 12, 280 [mu]mol / g / h with a small loading capacity, the higher hydrogen yield can be achieved under visible light irradiation, and the photocatalysis hydrogen production efficiency is respectively 6.5 times, 11.5 times and 20.3 times of a Mn0.5Cd0.5S monomer.

Description

technical field [0001] The invention belongs to the technical field of new energy and photocatalytic materials, in particular to the technical field of Mn-Cd-S solid solution photocatalytic hydrogen production, especially to the transition metal sulfide XS (X=Mo, Cu, Pd) supporting Mn 0.5 Cd 0.5 The application of S solid solution in photocatalytic hydrogen production, the present invention is to load transition metal sulfide XS (X=Mo, Cu, Pd) on Mn 0.5 Cd 0.5 On the S solid solution, the photocatalytic hydrogen production activity of the supported catalyst is greatly improved compared with the unsupported catalyst. Background technique [0002] Environmental pollution and energy shortage are major problems faced by human beings and need to be solved urgently. Therefore, the importance of developing photocatalytic technology has attracted widespread attention. Semiconductor photocatalytic oxidation technology can efficiently decompose organic pollutants and water to gener...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J27/04B01J27/045B01J27/051B01J37/16B01J37/34B82Y30/00B82Y40/00C01B3/04
CPCB01J27/04B01J27/045B01J27/051B01J35/004B01J37/16B01J37/344B82Y30/00B82Y40/00C01B3/042Y02E60/36
Inventor 张倩倩翟慧珊王朋黄柏标王泽岩张晓阳秦晓燕刘媛媛
Owner SHANDONG UNIV
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