Tribocatalytic degradation of concentrated methyl orange solutions by BiFeO3 nanoparticles prepared through a sol–gel method

IF 3.9 3区 化学 Q2 CHEMISTRY, MULTIDISCIPLINARY
RSC Advances Pub Date : 2025-07-04 DOI:10.1039/D5RA02423D
Yanhong Gu, Weiying Zhang, Yuen Li, Kelan Wang, Lanlan Ge, Xianghui Zhang, Jianguo Zhao, Zhenjiang Shen, Wanping Chen and Yaohua Hu
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引用次数: 0

Abstract

With a relatively narrow bandgap of around 2.0 eV, BiFeO3 (BFO) nanoparticles have been extensively investigated as an appealing visible-light photocatalyst. In this study, BFO nanoparticles prepared through a sol–gel method were explored as a tribocatalyst to degrade methyl orange (MO) solutions. With BFO nanoparticles stimulated through magnetic stirring using Teflon magnetic rotary disks, as much as 100% of 10 mg per L MO and 99% of 30 mg per L MO solutions were degraded after 20 min and 160 min of magnetic stirring, respectively. For reference, TiO2 nanoparticles (P25) were stimulated under the same conditions and degraded 97% of 10 mg per L MO and 97% of 30 mg per L MO solutions after 150 min and 540 min of magnetic stirring, respectively. The calculated MO degradation rate constants for BFO at concentrations of 10 mg per L and 30 mg per L were 4.94 h−1 and 1.19 h−1, respectively, while the corresponding values for P25 were 0.86 h−1 and 0.40 h−1, respectively. Free radical trapping experiments showed that positive holes are by far the most important active species in the tribocatalytic degradation of MO by BFO. These findings suggest that in addition to its versatile applications, multiferroic BFO is promising for converting mechanical energy into chemical energy through tribocatalysis.

Abstract Image

溶胶-凝胶法制备的BiFeO3纳米颗粒摩擦催化降解浓甲基橙溶液
BiFeO3 (BFO)纳米颗粒的禁带相对较窄,约为2.0 eV,作为一种吸引人的可见光催化剂,已经得到了广泛的研究。在本研究中,通过溶胶-凝胶法制备BFO纳米颗粒作为摩擦催化剂降解甲基橙(MO)溶液。用铁氟龙磁性旋转圆盘对BFO纳米颗粒进行磁力搅拌,在磁力搅拌20 min和160 min后,10 mg / L MO溶液的降解率分别高达100%和99%。作为参考,TiO2纳米粒子(P25)在相同的条件下受到刺激,经过150 min和540 min的磁搅拌,分别降解了97%的10 mg / L MO和97%的30 mg / L MO溶液。BFO在10 mg / L和30 mg / L浓度下的MO降解速率常数分别为4.94 h−1和1.19 h−1,P25的降解速率常数分别为0.86 h−1和0.40 h−1。自由基捕获实验表明,正空穴是迄今为止BFO摩擦催化降解MO过程中最重要的活性物种。这些发现表明,除了其广泛的应用之外,多铁BFO还有望通过摩擦催化将机械能转化为化学能。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
RSC Advances
RSC Advances chemical sciences-
CiteScore
7.50
自引率
2.60%
发文量
3116
审稿时长
1.6 months
期刊介绍: An international, peer-reviewed journal covering all of the chemical sciences, including multidisciplinary and emerging areas. RSC Advances is a gold open access journal allowing researchers free access to research articles, and offering an affordable open access publishing option for authors around the world.
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