新型三元金属氧化物纳米粒子La2Cu0.8Zn0.2O4作为可见光光催化降解亚甲基蓝和二苯并噻吩脱硫的潜在光催化剂

IF 2.5 4区 材料科学 Q3 MATERIALS SCIENCE, MULTIDISCIPLINARY
Molood Barmala, M. Behnood
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引用次数: 1

摘要

本文采用简单共沉淀法制备了新型三元金属氧化物纳米粒子la2cu0.8 zn0.2 2o4 (LCZO)。采用x射线衍射、扫描电镜和能量色散x射线分析对制备的LCZO纳米颗粒的晶体结构、形貌和组成进行了表征。漫反射光谱研究表明,LCZO纳米颗粒在可见光区有相当大的光吸收。此外,LCZO纳米颗粒具有2.82 eV的带隙能量。为了考察所制备的LCZO纳米颗粒的可见光催化性能,进行了亚甲基蓝(MB)溶液降解和二苯并噻吩(DBT)脱硫两种光催化反应。在H2O2/DBT摩尔比为3:1的条件下,0.2 g LCZO光催化剂对DBT的光催化脱硫率高达93.7%。此外,光催化对MB溶液的降解率为91.4%。用不同的自由基清除剂对两种光催化反应的机理进行了研究,结果表明,羟基自由基具有高效的脱硫和降解反应。重复使用实验表明,制备的LCZO光催化剂经过6个反应循环后,对DBT的脱硫和MB的降解均具有良好的稳定性和可回收性。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Novel ternary metal oxide nanoparticles (La2Cu0.8Zn0.2O4) as a potential photocatalyst for visible light photocatalytic degradation of methylene blue and desulfurization of dibenzothiophene
In this work we present the preparation of novel ternary metal oxide nanoparticles, La2Cu0.8Zn0.2O4 (LCZO), using a simple co-precipitation method. The crystalline structure, morphology and composition of the prepared LCZO nanoparticles were characterized by x-ray diffraction, scanning electron microscopy and energy-dispersive x-ray analysis. The diffuse reflectance spectrum investigation showed that LCZO nanoparticles have considerable light absorption in the visible light region. Also, the LCZO nanoparticles possess a band-gap energy of 2.82 eV. To investigate the visible light photocatalytic potential of the prepared LCZO nanoparticles, two photocatalytic reactions were conducted, namely degradation of methylene blue (MB) solution and desulfurization of dibenzothiophene (DBT). In the presence of a 3:1 molar ratio of H2O2/DBT, a high photocatalytic desulfurization rate of DBT (93.7%) was obtained over 0.2 g of LCZO photocatalyst. In addition, the photocatalytic degradation rate of MB solution was 91.4%. The mechanisms of both photocatalytic reactions were studied using different radical scavenging agents, which showed that hydroxyl radicals are responsible for highly efficient desulfurization and degradation reactions. Moreover, reusability experiments reveal that the prepared LCZO photocatalyst has great stability and recyclability for both desulfurization of DBT and degradation of MB after six reaction cycles.
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来源期刊
Nano Futures
Nano Futures Chemistry-General Chemistry
CiteScore
4.30
自引率
0.00%
发文量
35
期刊介绍: Nano Futures mission is to reflect the diverse and multidisciplinary field of nanoscience and nanotechnology that now brings together researchers from across physics, chemistry, biomedicine, materials science, engineering and industry.
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