Efficient piezo-catalytic dye degradation using piezoelectric 6H-SiC under harsh conditions

Lin-Lin Zhou ¹Tao Yang ²Kang Wang ¹Lai-Pan Zhu ³En-Hui Wang ²Kuo-Chih Chou ¹Hai-Long Wang ⁴Xin-Mei Hou⁵

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作者信息

1. Institute for Carbon Neutrality,University of Science and Technology Beijing,Beijing 100083,China
2. Institute for Carbon Neutrality,University of Science and Technology Beijing,Beijing 100083,China;Institute of Steel Sustainable Technology,Liaoning Academy of Materials,Shenyang 110000,China
3. Beijing Institute of Nanoenergy and Nanosystems,Chinese Academy of Sciences,Beijing 101400,China
4. School of Materials Science Engineering,Zhengzhou University,Zhengzhou 450001,China
5. Institute for Carbon Neutrality,University of Science and Technology Beijing,Beijing 100083,China;Institute of Steel Sustainable Technology,Liaoning Academy of Materials,Shenyang 110000,China;Beijing Advanced Innovation Center for Materials Genome Engineering Beijing,University of Science and Technology,Beijing 100083,China
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Abstract

The development of novel piezoelectric cata-lysts against harsh conditions is indeed crucial for improving the piezo-catalytic degradation efficiency of colored organic dyes in wastewater.In this work,6H-SiC nanoparticles(NPs)are utilized to piezo-catalytic degrade rhodamine B(RhB)and methylene blue(MB)under ultrasonic vibration for the first time.The degradation efficiency of RhB and MB reaches 98.8％and 98.7％within 80 min.The piezoelectricity of 6H-SiC is compre-hensively analyzed by the piezoresponse force microscope(PFM)and finite element method(FEM).The strong oxi-dizing active free radicals generated by the continuous piezoelectric polarized electric field of 6H-SiC,i.e.,·O2-and·OH,induce the decomposition reactions of colored organic dyes in solution.And the dyes are proven to degrade to harmless or less-harmful products gradually during the piezo-catalysis process by high-performance liquid chromatography tandem mass spectrometry(HPLC-MS).Moreover,RhB is also decomposed efficiently by 6H-SiC NPs under acidic and alkaline conditions.These results prove the feasibility of 6H-SiC for decomposing common water pollutants under harsh conditions and provide a new perspective for water purification.

Key words

Piezo-catalytic degradation/6H-SiC/Rhodamine B(RhB)/Methylene blue(MB)/Harsh conditions

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基金项目

National Science Fund for Distinguished Young Scholars(52025041)

National Natural Science Foundation of China(51902020)

National Natural Science Foundation of China(51974021)

National Natural Science Foundation of China(52250091)

Fundamental Research Funds for the Central Universities(FRF-TP-20-02C2)

State Key Laboratory of Featured Metal Materials and Lifecycle Safety for Composite Structures,Guangxi University(2021GXYSOF12)

Interdisciplinary Research Project for Young Teachers of USTB(Fundamental Research Funds for the Central Universities)(FRF-IDRY-21-028)

出版年

2024

稀有金属(英文版)

中国有色金属学会

稀有金属(英文版)

CSTPCDCSCDEI

影响因子：0.801

ISSN：1001-0521

参考文献量3

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