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Pt-Cu/ZnO plasma photocatalyst as well as preparation method and application thereof

A technology of plasma and photocatalyst, which is applied in the field of ionic photocatalyst and its preparation, can solve the problems of limited photoresponse range and light utilization rate of simple noble metals, and achieve easy control of the preparation process, light utilization rate, and particle distribution. uniform effect

Active Publication Date: 2021-06-18
YANCHENG INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003]In the existing plasmonic photocatalysts, the photocatalyst is decorated with the single noble metal as a unit. However, when the photocatalyst is modified with the single noble metal, it is limited by the Light Response Range and Light Utilization Efficiency
There are no reports on metal alloy modified photocatalysts

Method used

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  • Pt-Cu/ZnO plasma photocatalyst as well as preparation method and application thereof
  • Pt-Cu/ZnO plasma photocatalyst as well as preparation method and application thereof
  • Pt-Cu/ZnO plasma photocatalyst as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] 1. Preparation of Pt-Cu alloy: Add 49mg of Pt / C (10wt% Pt) catalyst (Aladdin) to ethanol aqueous solution with a volume fraction of 75%, ultrasonically stir at room temperature for 1 hour until uniformly dispersed, then add 40mg of dopamine (PDA) , stirred at room temperature for 4h, added 10ml of 5wt% polyvinylpyrrolidone aqueous solution (PVP-K30), 6ml of acetonitrile, 4ml of 0.1mol / L ascorbic acid aqueous solution, and added dropwise 2.5ml of 0.01mol / LCuCl 2 aqueous solution, after reacting for 1 h, the solid was obtained by filtration, and centrifuged and washed three times with deionized water to obtain Cu 0.5 -Pt 0.5 / C@PDA.

[0028] 2. Preparation of sol-gel: Add 1.8g of zinc acetate into 50ml of 75% ethanol aqueous solution by volume fraction, add 30ml of ethyl acetate solution, heat and stir to raise the temperature to 70°C, stir for 0.5h, and add the obtained product in step (1) All of the Cu / Pt / C@PDA was stirred at a constant temperature of 70°C to 20mL sol...

Embodiment 2

[0032] 1. Preparation of Pt-Cu alloy: Add 69mg of Pt / C (10wt% Pt) catalyst (Aladdin) to 75% volume fraction ethanol aqueous solution, ultrasonically stir at room temperature for 1h until uniformly dispersed, then add 40mg of dopamine (PDA) , stirred at room temperature for 5h, added 12ml of 3wt% polyvinylpyrrolidone aqueous solution (PVP-K30), 8ml of acetonitrile, 1ml of 0.1mol / L ascorbic acid aqueous solution, and added dropwise 1.5ml of 0.01mol / LCuCl 2 Aqueous solution, after reacting for 2 hours, filtered to obtain solid, centrifuged and washed three times with deionized water to obtain Cu 0.3 -Pt 0.7 / C@PDA.

[0033] 2. Preparation of sol-gel: Add 1.8g of zinc acetate into 50ml of 75% ethanol aqueous solution by volume fraction, add 30ml of ethyl acetate solution, heat and stir to raise the temperature to 75°C, stir for 0.5h, and add the obtained product in step (1) All Cu / Pt / C@PDA was stirred at a constant temperature of 70°C to 20ml sol state, and dried in a drying oven...

Embodiment 3

[0036] 1. Preparation of Pt-Cu alloy: Add 88mg of Pt / C (10wt% Pt) catalyst (Aladdin) to an aqueous ethanol solution with a volume fraction of 75%, ultrasonically stir at room temperature for 2 hours until uniformly dispersed, then add 40mg of dopamine (PDA) , stirred at room temperature for 5h, added 10ml 8wt% polyvinylpyrrolidone aqueous solution (PVP-K30), 10ml acetonitrile, 1ml 0.1mol / L ascorbic acid aqueous solution, and added dropwise 0.5ml 0.01mol / LCuCl 2 Solution, after reacting for 2h, filtered to obtain the solid, centrifuged and washed three times with deionized water to obtain Cu 0.1 -Pt 0.9 / C@PDA.

[0037] 2. Preparation of sol-gel: Add 1.8g of zinc acetate into 50ml of 75% ethanol aqueous solution by volume fraction, add 30ml of ethyl acetate solution, heat and stir to raise the temperature to 80°C, stir for 0.5h, and add the obtained product in step (1) All Cu / Pt / C@PDA was stirred at 80°C to 20ml sol state, and dried in a drying oven at 100°C for 12h.

[0038...

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Abstract

The invention discloses a Pt-Cu / ZnO plasma photocatalyst as well as a preparation method and application thereof. The preparation method comprises the following steps: adding a Pt / C catalyst into ethanol, conducting dispersing, adding dopamine, polyvinylpyrrolidone, acetonitrile and ascorbic acid, dropwise adding CuCl2, and conducting reacting to obtain Cu-Pt / C-coated PDA; adding zinc acetate into ethanol, then adding ethyl acetate, conducting heating and stirring, adding Cu / Pt / C-coated PDA, and conducting stirring at a constant temperature to a sol state; and calcining the sol-gel to obtain the Pt-Cu / ZnO plasma photocatalyst. The preparation method of the Pt-Cu / ZnO plasma photocatalyst has the advantages that the process is simple, the cost is low, the raw materials are wide, the preparation process is easy to control, the yield is high and the like. The product prepared by the invention is nano-scale particles with uniform size, can play a size effect in a photocatalytic process, improves photocatalytic activity, and has good catalytic degradation efficiency for degrading methylene blue.

Description

technical field [0001] The invention belongs to the technical field of photocatalysts, and in particular relates to a Pt-Cu / ZnO plasma photocatalyst and its preparation method and application. Background technique [0002] With the progress of society and the acceleration of industrialization, environmental problems have become an urgent problem to be solved. As we all know, photocatalysis has been proved to be a promising environmental cleaning technology for purifying organic pollutants and reducing inorganic oxides. Due to general TiO 2 The low light utilization efficiency and high photogenerated electron-hole recombination rate lead to low catalytic activity of photocatalysts. In 2008, Awazu modified TiO with precious metal Ag 2 surface, thus the TiO 2 The plasmon resonance effect is generated on the surface, and surface plasmon photocatalysis was proposed for the first time (J.Am, Chem.Soc, 2008, 130(5):1676~1680). The plasmon resonance effect is when metal nanoparti...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/89C02F1/30C02F101/38
CPCB01J23/8953C02F1/30C02F2101/40C02F2305/10B01J35/39Y02W10/37
Inventor 崔恩田李清萍陈思佳侯贵华邓育新
Owner YANCHENG INST OF TECH
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