异价态和氧空位缺陷结构相关的 V/S 共掺杂二氧化锡在黑暗中催化还原有机物和 Cr6+ 污染物

IF 6.5 3区 材料科学 Q2 GREEN & SUSTAINABLE SCIENCE & TECHNOLOGY
Baoqian Yang, Xinru Wu, Zhengjie Su, Benjamin Kunkadma Insua, Pengkun Zhang, Dong-Hau Kuo, Lulu Gao, Xinde Bao, Dongfang Lu, Jinguo Lin, Xiaoyun Chen
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The hydrazine adjusts the heterovalent metal states to reduce Sn<sup>4+</sup> to Sn<sup>2+</sup> and V<sup>5+</sup> to V<sup>4+</sup>. Also, it introduces oxygen vacancies to SnVSO to maintain the charge equilibrium and increase the active surface reactive sites, which enhance the catalytic activity. The SnVSO-3 prepared with 0.4 mL hydrazine exhibits excellent catalytic activity, which wholly reduces 20 ppm of 100 mL methyl orange (MO), rhodamine B (RhB), methylene blue (MB), hexavalent chromium (Cr<sup>6+</sup>), and 4-nitrophenol (4-NP) within 6 min. In addition, the SnVSO-3 also has good stability after repeated 6 runs with a reduction efficiency of 96.8%. 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引用次数: 0

摘要

通过一种绿色、简便的方法制备了具有异价态和氧空位缺陷的 V/S 共掺杂 SnO2 双金属硫氧化物催化剂,标记为 (Sn,V)1-x(S,O)2-y 或 (SnVSO)。SnVSO 在 Sn4+/Sn2+ 和 V5+/V4+ 的异价态中的存在促进了电子的快速转移。它提高了电子电荷的寿命,加快了催化还原污染物的效率。V/S 共掺杂 SnO2 调节了带隙能结构。肼调整异价金属态,将 Sn4+ 还原为 Sn2+,将 V5+ 还原为 V4+。同时,肼还为 SnVSO 引入了氧空位,以维持电荷平衡并增加活性表面活性位点,从而提高催化活性。用 0.4 mL 联氨制备的 SnVSO-3 表现出卓越的催化活性,可在 6 分钟内完全还原 20 ppm 的 100 mL 甲基橙 (MO)、罗丹明 B (RhB)、亚甲基蓝 (MB)、六价铬 (Cr6+) 和 4-硝基苯酚 (4-NP)。此外,SnVSO-3 在反复运行 6 次后也具有良好的稳定性,还原效率高达 96.8%。因此,V/S 共掺杂 SnO2 氧化硫催化剂在还原 Cr6+ 和有机污染物方面具有广阔的前景。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

Heterovalent State and Oxygen Vacancy Defect Structure-Associated V/S Co-Doped SnO2 for Catalytic Reduction of Organic and Cr6+ Pollutants in the Dark

Heterovalent State and Oxygen Vacancy Defect Structure-Associated V/S Co-Doped SnO2 for Catalytic Reduction of Organic and Cr6+ Pollutants in the Dark

Heterovalent State and Oxygen Vacancy Defect Structure-Associated V/S Co-Doped SnO2 for Catalytic Reduction of Organic and Cr6+ Pollutants in the Dark

V/S co-doped SnO2 bimetal sulfur-oxides catalysts labeled as (Sn,V)1-x(S,O)2-y or (SnVSO) with heterovalent state and oxygen vacancy defect are prepared via a green and facile method. The presence of SnVSO in the heterovalent states of Sn4+/Sn2+ and V5+/V4+ facilitates the rapid transfer of the electrons. It improves the electronic charge lifetime, accelerating the efficiency of the catalytic reduction of pollutants. The V/S co-doped SnO2 regulates the bandgap energy structure. The hydrazine adjusts the heterovalent metal states to reduce Sn4+ to Sn2+ and V5+ to V4+. Also, it introduces oxygen vacancies to SnVSO to maintain the charge equilibrium and increase the active surface reactive sites, which enhance the catalytic activity. The SnVSO-3 prepared with 0.4 mL hydrazine exhibits excellent catalytic activity, which wholly reduces 20 ppm of 100 mL methyl orange (MO), rhodamine B (RhB), methylene blue (MB), hexavalent chromium (Cr6+), and 4-nitrophenol (4-NP) within 6 min. In addition, the SnVSO-3 also has good stability after repeated 6 runs with a reduction efficiency of 96.8%. Therefore, the V/S co-doped SnO2 sulfur oxide catalysts have a promising potential for reducing Cr6+ and organic pollutants.

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来源期刊
Advanced Sustainable Systems
Advanced Sustainable Systems Environmental Science-General Environmental Science
CiteScore
10.80
自引率
4.20%
发文量
186
期刊介绍: Advanced Sustainable Systems, a part of the esteemed Advanced portfolio, serves as an interdisciplinary sustainability science journal. It focuses on impactful research in the advancement of sustainable, efficient, and less wasteful systems and technologies. Aligned with the UN's Sustainable Development Goals, the journal bridges knowledge gaps between fundamental research, implementation, and policy-making. Covering diverse topics such as climate change, food sustainability, environmental science, renewable energy, water, urban development, and socio-economic challenges, it contributes to the understanding and promotion of sustainable systems.
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