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Preparation method of LSPR effect-based metal modified self-doped defect-enriched tin oxide nano composite material

A nanocomposite material and metal modification technology, which is applied in the field of preparation of tin oxide nanocomposite materials, can solve the problems of difficult PICS and low cost, and achieve the effects of improving lifespan, improving electrical conductivity and tight interface bonding.

Active Publication Date: 2018-12-28
PINGDINGSHAN UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, materials with strong LSPR effect mainly include metal nanoparticles such as Pt, Au, Ag, and Cu, and some non-metallic compounds (such as CuS, WO 3-x and MoO 3-x etc.) Although they can also exhibit the LSPR effect and are less costly, the low carrier concentration makes it difficult to achieve effective PICS

Method used

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  • Preparation method of LSPR effect-based metal modified self-doped defect-enriched tin oxide nano composite material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] 1) get 1mmol analytically pure stannous methanesulfonate ((CH 3 SO 3 ) 2 Sn) and 3.2mmol of citric acid are fully dissolved in 4mL of absolute ethanol, then add 0.5mmol of phytic acid and 10mL of deionized water successively, then adjust its pH value to 10 with 8mol / L NaOH solution, the whole process In the ice-salt bath of NaCl and crushed ice, use a constant temperature magnetic stirring device to continuously magnetically stir it at -20°C to obtain solution A;

[0034] 2) get 0.5mmol analytically pure chloroplatinic acid (H 2 PtCl 6 ), 1mmol of chloroauric acid (HAuCl 4 ) and 5 mmol of citric acid were fully dissolved in 8 mL of deionized water, and then used a constant temperature magnetic stirring device in an ice-salt bath of NaCl and crushed ice to carry out continuous magnetic stirring and mixing at a temperature of -20 ° C to obtain a uniform solution B;

[0035] 3) Add solution B dropwise to solution A at a rate of 30 drops / min. During the whole dropping...

Embodiment 2

[0039] 1) get 1mmol analytically pure stannous methanesulfonate ((CH 3 SO 3 ) 2Sn) and 4mmol of citric acid are fully dissolved in 6mL of absolute ethanol, then add 5mmol of phytic acid and 20mL of deionized water successively, then adjust its pH value to 6 with 4mol / L NaOH solution, the whole process is in NaCl In the ice-salt bath with crushed ice, use a constant temperature magnetic stirring device to continuously magnetically stir it at -10°C to obtain solution A;

[0040] 2) get 0.2mmol analytically pure chloroplatinic acid (H 2 PtCl 6 ), 1.5mmol of silver nitrate (AgNO 3 ) and 7 mmol of citric acid were fully dissolved in 13 mL of deionized water, and then used a constant temperature magnetic stirring device in an ice-salt bath of NaCl and crushed ice to carry out continuous magnetic stirring and mixing at a temperature of -10 ° C to obtain a uniform solution B;

[0041] 3) Add solution B dropwise to solution A at a rate of 40 drops / min. During the whole dropping p...

Embodiment 3

[0046] 1) get 1mmol analytically pure stannous methanesulfonate ((CH 3 SO 3 ) 2 Sn) and the citric acid of 8.7mmol are fully dissolved in the dehydrated alcohol of 10mL, then add the phytic acid of 9mmol and the deionized water of 25mL successively, then adjust its pH value to be 4 with the NaOH solution of 1mol / L, the whole process is in In the ice-salt bath of NaCl and crushed ice, use a constant temperature magnetic stirring device to continuously magnetically stir it at 10°C to obtain solution A;

[0047] 2) get 0.5mmol analytically pure chloroplatinic acid (H 2 PtCl 6 ), 2mmol of silver nitrate (AgNO 3 ), 7mmol of copper nitrate (Cu(NO 3 ) 2 ) and 12mmol of citric acid were fully dissolved in 20mL of deionized water, and then used a constant temperature magnetic stirring device in an ice-salt bath of NaCl and crushed ice to carry out continuous magnetic stirring and mixing at a temperature of 10°C to obtain solution B ;

[0048] 3) Add solution B dropwise to solut...

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Abstract

The invention discloses a preparation method of an LSPR effect-based metal modified self-doped defect-enriched tin oxide nano composite material. The nano composite material modifies nano metal particles with a plasma resonant effect to a self-doped defect-enriched tin oxide nano composite catalyst material through chemical bond complexing; the self-doped defect-enriched tin oxide is selected fromSn-doped non-stoichiometric or mixed valent oxygen-enriched defective tin oxide (SnO2-x). The nano metal with the plasma resonant effect is selected from metal nanoparticles of a single component metal or a multi-component alloy such as Pt, Au, Ag, Cu and the like which have the plasma resonant effect. The photo-induced electron-hole separating rate in a photocatalytic reaction is fully improvedby means of the visible light photocatalytic oxidizing and reducing characteristic of the self-doped defect-enriched tin oxide, the plasma resonant effect of the metal nanoparticles and a heterogeneous structure with chemical bonding between the two components, so that the performance of degrading pollutants by photocatalytic oxidization and reduction and decomposing water to generate hydrogen bymeans of light catalysis is improved favorably.

Description

technical field [0001] The invention relates to a method for preparing a tin oxide nanocomposite material, in particular to a method for preparing a self-doped defect-rich tin oxide nanocomposite material based on LSPR effect metal modification. Background technique [0002] At present, the research progress of photocatalytic technology has brought hope and motivation to people, but the improvement of its efficiency is still a challenge. The development of catalytic materials with broad-spectrum absorption of solar energy, high carrier separation rate and strong redox ability is the key to realize efficient photo-water splitting technology [ Chen Hongshan, Wei Huahua. The method and development status of hydrogen production by using solar energy[J].Materials Herald,2015,29(11):36-40.][Ran,J.,Zhang,J.,Yu,J.,Jaroniec ,M.,Qiao,S.Z.Earth-abundant cocatalysts for semiconductor-based photocatalytic water splitting[J].Chemical Society Reviews,2014,43(22):7787-7812.], but single or...

Claims

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Application Information

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IPC IPC(8): B01J23/66B01J35/02
CPCB01J23/66B01J35/40B01J35/39
Inventor 杨柳青白青高航
Owner PINGDINGSHAN UNIVERSITY
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