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Photocatalyst (Cu, Pd)-NiGa2O4/BiVO4 with double promoter and application thereof

A technology of photocatalyst and dual promoters, which is applied in the field of photocatalysis, can solve problems such as environmental and ecological pollution, and achieve the effects of increasing production rate, stable properties and broad prospects

Active Publication Date: 2019-07-23
LIAONING UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to solve the environmental and ecological pollution caused by organic dyes containing N elements in wastewater, the present invention designs a novel Z-type photocatalytic system

Method used

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  • Photocatalyst (Cu, Pd)-NiGa2O4/BiVO4 with double promoter and application thereof
  • Photocatalyst (Cu, Pd)-NiGa2O4/BiVO4 with double promoter and application thereof
  • Photocatalyst (Cu, Pd)-NiGa2O4/BiVO4 with double promoter and application thereof

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Experimental program
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Effect test

Embodiment 1

[0036] Embodiment 1 A kind of photocatalyst (Cu, Pd)-NiGa with double promoter 2 o 4 / BiVO 4

[0037] (1) Preparation method

[0038] (1)NiGa 2 o 4 Preparation of nanoparticles.

[0039] Take 9.40g Ga 2 o 3 The solid was added to 100 mL of 0.5 mol / L nickel nitrate solution, and the resulting mixture was adjusted to pH 12 with 1.0 mol / L sodium hydroxide (stirring for 30 min while adjusting), and the obtained suspension solution was transferred to a reaction kettle at 180 ° C for 48 h, After cooling the sample to room temperature, a light blue precipitate was obtained and washed several times with deionized water. The obtained precipitate was dried at 60°C for 8 hours to obtain NiGa 2 o 4 Powder. Grind the powder finely, bake it in a muffle furnace at 500°C for 2.0 hours, take it out and grind it to get NiGa 2 o 4 Nanoparticles.

[0040] (2) BiVO 4 Preparation of nanoparticles.

[0041] 0.015mol Bi(NO 3 ) 3 ·5H 2 O is completely dissolved in 20mL of 5mol / L nit...

Embodiment 2

[0062] Example 2 Z-shaped photocatalyst (Cu, Pd)-NiGa with double promoters 2 o 4 / BiVO 4 converting NO 2 - , SO 3 2- and applications in organic dyes

[0063] (1) in NO 2 - and SO 3 2- Effects of deposition order, molar ratio and content of Cu and Pd on photocatalytic activity during conversion

[0064] Experimental method: 0.1g(Cu,Pd)-NiGa 2 o 4 / BiVO 4 The catalyst is put into 100ml 30mg / L NO 2 - and 50mg / L of SO 3 2- in the mixed solution. At a temperature of 25-28°C, irradiate with a xenon lamp for 4.0h with an interval of 1h.

[0065] cocatalyst to NO 2 - Converted to selective generation of NH 4 + has an important role. The NH 4 + , N 2 , NO 3 - and SO 4 2- The formation rate and NO 2 - and SO 3 2- conversion rate.

[0066] 1, Figure 7a Three cases of Cu followed by Pd, Pd followed by Cu, Cu and Pd at the same time were investigated respectively.

[0067] Methods as below:

[0068] (1) Deposit Cu first and then deposit Pd: 1.5g NiG...

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Abstract

The invention discloses a photocatalyst (Cu, Pd)-NiGa2O4 / BiVO4 with double promoter and an application thereof. The photocatalyst is prepared by utilizing illumination assisting and a chemical reduction deposition method according to the following steps: dispersing (Cu, Pd)-NiGa2O4 and BiVO4 into an ethanol solution; centrifuging after ultrasonically dispersing for 5.0min; drying the acquired sediment, grinding and transferring into a muffle furnace; thermally treating for 2.0h while keeping temperature at 500 DEG C, thereby acquiring a Z type photocatalyst (Cu, Pd)-NiGa2O4 / BiVO4 compound. Inthe invention, Cu and Pd are capable of providing more active sites as well as accelerating electron transfer. The compounded (Cu, Pd)-NiGa2O4 / BiVO4 photocatalyst applied to degradation of wastewatercontaining N organic dyestuffs has an ultra-high photocatalytic degradation activity.

Description

technical field [0001] The invention belongs to the field of photocatalysis, in particular to novel photocatalyst (Cu, Pd)-NiGa 2 o 4 / BiVO 4 Preparation and its photocatalytic conversion of organic dyes containing N elements into NH, the main raw material for fertilizers 4 NO 3 in the application. Background technique [0002] Photocatalysis has attracted the attention of researchers due to its advantages of mild reaction conditions and the ability to directly convert solar energy into chemical energy. Photocatalysis can convert solar energy into chemical energy, such as photolysis of water to produce hydrogen, photoreduction of carbon dioxide, and photocatalytic conversion. In addition, photocatalysis can also use solar energy to degrade organic pollutants, reduce toxic anions and heavy metal ions, and achieve cleaning, so it is also an ideal environmental pollution control technology. Photocatalysis has shown great application prospects in the fields of energy and e...

Claims

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Application Information

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IPC IPC(8): B01J23/89C02F1/30C05C1/00C02F101/16
CPCB01J23/002C05C1/00B01J23/8993C02F1/30B01J2523/00C02F2101/16C02F2305/10B01J35/39B01J2523/847B01J2523/842B01J2523/55B01J2523/54B01J2523/32B01J2523/824
Inventor 王君张萌张朝红李思怡王迪
Owner LIAONING UNIVERSITY
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