通过光催化臭氧增强氰化物氧化为氰酸盐:比较 Sol-Gel 和水热法合成 BiVO4 催化剂

IF 3.8 4区 环境科学与生态学 Q2 ENVIRONMENTAL SCIENCES
Johan A. Vargas-Rueda, Alejandro R. Alonso, Rosa M. Luna-Sánchez, L. Lartundo-Rojas, Román Cabrera-Sierra
{"title":"通过光催化臭氧增强氰化物氧化为氰酸盐:比较 Sol-Gel 和水热法合成 BiVO4 催化剂","authors":"Johan A. Vargas-Rueda,&nbsp;Alejandro R. Alonso,&nbsp;Rosa M. Luna-Sánchez,&nbsp;L. Lartundo-Rojas,&nbsp;Román Cabrera-Sierra","doi":"10.1007/s11270-024-07637-w","DOIUrl":null,"url":null,"abstract":"<div><p>Bismuth vanadate has been reported as a promising active semiconductor for visible light harvesting. However, the rapid recombination of charge carriers has limited its photocatalytic properties. As an alternative route to treat contaminated water containing cyanide ions, photoactivated BiVO<sub>4</sub> in combination with ozone has been investigated. BiVO<sub>4</sub> photocatalysts were synthesized by microwave-assisted hydrothermal method, as well as by sol–gel, obtaining the monoclinic crystalline structure and a band gap of ~ 2.5 eV by XRD and UV–Vis DRS. The morphological analysis, elemental chemical composition, BET surface area, stability, and photoluminescence characteristics were carried out for both samples. Although the majority composition belongs to BiVO<sub>4</sub>, the presence of secondary phases was confirmed by XPS. The BiVO<sub>4</sub> obtained by sol–gel (sol–gel BVO) exhibited superior photocatalytic performance with a lower reaction time (15 min) to oxidize free cyanide under visible-light radiation in combination with ozone. The degradation kinetics is described by pseudo-zero-order kinetics, and the rate constant <i>(k</i><sub><i>0</i></sub><i>)</i> of BiVO<sub>4</sub> synthesized by microwave-assisted hydrothermal method was found to be the lower of the two. The high efficiency of the photocatalytic ozonation for the removal of free cyanide can be ascribed to a combination of two oxidation systems and the synergy of both processes.</p></div>","PeriodicalId":808,"journal":{"name":"Water, Air, & Soil Pollution","volume":"235 12","pages":""},"PeriodicalIF":3.8000,"publicationDate":"2024-11-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s11270-024-07637-w.pdf","citationCount":"0","resultStr":"{\"title\":\"Enhanced Cyanide Oxidation to Cyanate via Photocatalytic Ozonation: Comparing Sol–Gel and Hydrothermal Synthesis of BiVO4 Catalysts\",\"authors\":\"Johan A. Vargas-Rueda,&nbsp;Alejandro R. Alonso,&nbsp;Rosa M. Luna-Sánchez,&nbsp;L. Lartundo-Rojas,&nbsp;Román Cabrera-Sierra\",\"doi\":\"10.1007/s11270-024-07637-w\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><p>Bismuth vanadate has been reported as a promising active semiconductor for visible light harvesting. However, the rapid recombination of charge carriers has limited its photocatalytic properties. As an alternative route to treat contaminated water containing cyanide ions, photoactivated BiVO<sub>4</sub> in combination with ozone has been investigated. BiVO<sub>4</sub> photocatalysts were synthesized by microwave-assisted hydrothermal method, as well as by sol–gel, obtaining the monoclinic crystalline structure and a band gap of ~ 2.5 eV by XRD and UV–Vis DRS. The morphological analysis, elemental chemical composition, BET surface area, stability, and photoluminescence characteristics were carried out for both samples. Although the majority composition belongs to BiVO<sub>4</sub>, the presence of secondary phases was confirmed by XPS. The BiVO<sub>4</sub> obtained by sol–gel (sol–gel BVO) exhibited superior photocatalytic performance with a lower reaction time (15 min) to oxidize free cyanide under visible-light radiation in combination with ozone. The degradation kinetics is described by pseudo-zero-order kinetics, and the rate constant <i>(k</i><sub><i>0</i></sub><i>)</i> of BiVO<sub>4</sub> synthesized by microwave-assisted hydrothermal method was found to be the lower of the two. The high efficiency of the photocatalytic ozonation for the removal of free cyanide can be ascribed to a combination of two oxidation systems and the synergy of both processes.</p></div>\",\"PeriodicalId\":808,\"journal\":{\"name\":\"Water, Air, & Soil Pollution\",\"volume\":\"235 12\",\"pages\":\"\"},\"PeriodicalIF\":3.8000,\"publicationDate\":\"2024-11-19\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"https://link.springer.com/content/pdf/10.1007/s11270-024-07637-w.pdf\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Water, Air, & Soil Pollution\",\"FirstCategoryId\":\"6\",\"ListUrlMain\":\"https://link.springer.com/article/10.1007/s11270-024-07637-w\",\"RegionNum\":4,\"RegionCategory\":\"环境科学与生态学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q2\",\"JCRName\":\"ENVIRONMENTAL SCIENCES\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Water, Air, & Soil Pollution","FirstCategoryId":"6","ListUrlMain":"https://link.springer.com/article/10.1007/s11270-024-07637-w","RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"ENVIRONMENTAL SCIENCES","Score":null,"Total":0}
引用次数: 0

摘要

据报道,钒酸铋是一种很有前景的可见光采集活性半导体。然而,电荷载流子的快速重组限制了其光催化特性。作为处理含氰离子污染水的另一种方法,研究人员研究了光活化 BiVO4 与臭氧的结合。研究人员采用微波辅助水热法和溶胶-凝胶法合成了 BiVO4 光催化剂,通过 XRD 和 UV-Vis DRS 获得了单斜晶体结构和约 2.5 eV 的带隙。对两种样品进行了形貌分析、元素化学成分、BET 表面积、稳定性和光致发光特性的研究。虽然大部分成分属于 BiVO4,但 XPS 证实了次生相的存在。通过溶胶-凝胶法获得的 BiVO4(溶胶-凝胶 BVO)具有优异的光催化性能,在可见光辐射下与臭氧结合氧化游离氰的反应时间较短(15 分钟)。降解动力学采用伪零阶动力学描述,发现微波辅助水热法合成的 BiVO4 的速率常数(k0)是两者中较低的。光催化臭氧去除游离氰的高效率可归因于两种氧化体系的结合以及两种过程的协同作用。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Enhanced Cyanide Oxidation to Cyanate via Photocatalytic Ozonation: Comparing Sol–Gel and Hydrothermal Synthesis of BiVO4 Catalysts

Bismuth vanadate has been reported as a promising active semiconductor for visible light harvesting. However, the rapid recombination of charge carriers has limited its photocatalytic properties. As an alternative route to treat contaminated water containing cyanide ions, photoactivated BiVO4 in combination with ozone has been investigated. BiVO4 photocatalysts were synthesized by microwave-assisted hydrothermal method, as well as by sol–gel, obtaining the monoclinic crystalline structure and a band gap of ~ 2.5 eV by XRD and UV–Vis DRS. The morphological analysis, elemental chemical composition, BET surface area, stability, and photoluminescence characteristics were carried out for both samples. Although the majority composition belongs to BiVO4, the presence of secondary phases was confirmed by XPS. The BiVO4 obtained by sol–gel (sol–gel BVO) exhibited superior photocatalytic performance with a lower reaction time (15 min) to oxidize free cyanide under visible-light radiation in combination with ozone. The degradation kinetics is described by pseudo-zero-order kinetics, and the rate constant (k0) of BiVO4 synthesized by microwave-assisted hydrothermal method was found to be the lower of the two. The high efficiency of the photocatalytic ozonation for the removal of free cyanide can be ascribed to a combination of two oxidation systems and the synergy of both processes.

求助全文
通过发布文献求助,成功后即可免费获取论文全文。 去求助
来源期刊
Water, Air, & Soil Pollution
Water, Air, & Soil Pollution 环境科学-环境科学
CiteScore
4.50
自引率
6.90%
发文量
448
审稿时长
2.6 months
期刊介绍: Water, Air, & Soil Pollution is an international, interdisciplinary journal on all aspects of pollution and solutions to pollution in the biosphere. This includes chemical, physical and biological processes affecting flora, fauna, water, air and soil in relation to environmental pollution. Because of its scope, the subject areas are diverse and include all aspects of pollution sources, transport, deposition, accumulation, acid precipitation, atmospheric pollution, metals, aquatic pollution including marine pollution and ground water, waste water, pesticides, soil pollution, sewage, sediment pollution, forestry pollution, effects of pollutants on humans, vegetation, fish, aquatic species, micro-organisms, and animals, environmental and molecular toxicology applied to pollution research, biosensors, global and climate change, ecological implications of pollution and pollution models. Water, Air, & Soil Pollution also publishes manuscripts on novel methods used in the study of environmental pollutants, environmental toxicology, environmental biology, novel environmental engineering related to pollution, biodiversity as influenced by pollution, novel environmental biotechnology as applied to pollution (e.g. bioremediation), environmental modelling and biorestoration of polluted environments. Articles should not be submitted that are of local interest only and do not advance international knowledge in environmental pollution and solutions to pollution. Articles that simply replicate known knowledge or techniques while researching a local pollution problem will normally be rejected without review. Submitted articles must have up-to-date references, employ the correct experimental replication and statistical analysis, where needed and contain a significant contribution to new knowledge. The publishing and editorial team sincerely appreciate your cooperation. Water, Air, & Soil Pollution publishes research papers; review articles; mini-reviews; and book reviews.
×
引用
GB/T 7714-2015
复制
MLA
复制
APA
复制
导出至
BibTeX EndNote RefMan NoteFirst NoteExpress
×
提示
您的信息不完整,为了账户安全,请先补充。
现在去补充
×
提示
您因"违规操作"
具体请查看互助需知
我知道了
×
提示
确定
请完成安全验证×
copy
已复制链接
快去分享给好友吧!
我知道了
右上角分享
点击右上角分享
0
联系我们:info@booksci.cn Book学术提供免费学术资源搜索服务,方便国内外学者检索中英文文献。致力于提供最便捷和优质的服务体验。 Copyright © 2023 布克学术 All rights reserved.
京ICP备2023020795号-1
ghs 京公网安备 11010802042870号
Book学术文献互助
Book学术文献互助群
群 号:481959085
Book学术官方微信