Photocatalytic removal of aldrin and dieldrin using graphene oxide and TiO2-doped CuFe2O4

IF 2.8 4区生物学 Q3 BIOTECHNOLOGY & APPLIED MICROBIOLOGY Journal of chemical technology and biotechnology Pub Date : 2024-10-03 DOI:10.1002/jctb.7759

Sevil Akçağlar

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Abstract

BACKGROUND

Conventional treatment processes and existing photocatalysts have proven insufficient in efficiently removing aldrin and dieldrin. Consequently, this study aimed to investigate the removal of aldrin and dieldrin from surface water using a titanium dioxide/graphene oxide/copper ferrite (TiO₂/GO/CuFe₂O₄) nanocomposite.

RESULTS

The highest photodegradation efficiencies for aldrin (100%) and dieldrin (99%) were achieved with a TiO₂/GO/CuFe₂O₄ nanocomposite dosage of 1.3 mg L⁻¹, at a sunlight intensity of 9 W m⁻² and an optimal photodegradation time of 25 min. The maximum UV absorption wavelength of the TiO₂/GO/CuFe₂O₄ nanocomposite was observed at 365 nm. The quantum yield of the nanocomposite was recorded as 2.69 × 10² mol einstein⁻¹, and its bandgap energy was determined to be 3.31 eV. The first-order kinetic rate constants for aldrin and dieldrin were calculated as 0.05 and 0.047 min⁻¹, respectively. X-ray diffraction analysis confirmed the crystal structure of CuFe₂O₄/TiO₂, while Fourier transform infrared spectroscopy detected carboxylic, epoxy, carbonyl and other oxygenated groups within the TiO₂/GO/CuFe₂O₄ nanocomposite. Scanning electron microscopy and transmission electron microscopy images revealed that CuFe₂O₄ was situated on the outer layer of GO. Energy-dispersive X-ray analysis identified the elemental composition of the TiO₂/GO/CuFe₂O₄ nanocomposite as comprising GO, C, Cu, Fe, Ti and O. A reusability study demonstrated that the nanocomposite maintained excellent performance, achieving 99% removal efficiency after 79 cycles and 97% after 100 cycles.

CONCLUSIONS

The TiO₂/GO/CuFe₂O₄ nanocomposite effectively removed aldrin and dieldrin from surface water. This nanocomposite holds promise for the remediation of other aquatic ecosystems, such as bays, rivers and ocean waters. © 2024 The Author(s). Journal of Chemical Technology and Biotechnology published by John Wiley & Sons Ltd on behalf of Society of Chemical Industry (SCI).

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利用氧化石墨烯和掺杂 TiO2 的 CuFe2O4 光催化去除艾氏剂和狄氏剂

传统的处理方法和现有的光催化剂已被证明不足以有效地去除艾氏和狄氏。因此，本研究旨在研究使用二氧化钛/氧化石墨烯/铁氧体铜（TiO₂/GO/CuFe₂O₄）纳米复合材料去除地表水中的aldrin和dieldrin。结果tio2 /GO/CuFe₂O₄纳米复合材料用量为1.3 mg L−1，光照强度为9 W m−2，最佳光降解时间为25 min时，aldrin和dieldrin的光降解效率最高（100%），最高（99%）。tio2 /GO/CuFe₂O₄纳米复合材料的最大紫外吸收波长为365 nm。该纳米复合材料的量子产率为2.69 × 102 mol einstein−1，带隙能为3.31 eV。aldrin和dieldrin的一级动力学速率常数分别为0.05和0.047 min−1。x射线衍射分析证实了CuFe₂O₄/TiO₂的晶体结构，傅里叶变换红外光谱检测到TiO₂/GO/CuFe₂O₄纳米复合材料中的羧基、环氧基、羰基等氧基。扫描电镜和透射电镜图像显示CuFe₂O₄位于氧化石墨烯的外层。能量色散x射线分析表明，tio2 /GO/CuFe₂O₄纳米复合材料的元素组成为GO、C、Cu、Fe、Ti和O。可重复使用性研究表明，该纳米复合材料在79次循环后的去除率达到99%，在100次循环后的去除率达到97%。结论tio2 /GO/CuFe₂O₄纳米复合材料能有效去除地表水中的艾氏和狄氏。这种纳米复合材料有望修复其他水生生态系统，如海湾、河流和海水。©2024作者。化学技术与生物技术杂志，John Wiley &出版；代表化学工业学会（SCI）的儿子有限公司。

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来源期刊

Journal of chemical technology and biotechnology 工程技术-工程：化工

CiteScore

7.00

自引率

5.90%

发文量

268

审稿时长

1.7 months

期刊介绍： Journal of Chemical Technology and Biotechnology(JCTB) is an international, inter-disciplinary peer-reviewed journal concerned with the application of scientific discoveries and advancements in chemical and biological technology that aim towards economically and environmentally sustainable industrial processes.

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