{"title":"基于可持续竹炭的纳米复合催化剂用于快速吸附和光-芬顿降解有毒染料","authors":"","doi":"10.1016/j.susmat.2024.e01080","DOIUrl":null,"url":null,"abstract":"<div><p>To efficiently and completely remove organic pollutants from water, developing composite catalysts with both adsorption and photocatalytic/Fenton catalytic degradation is a very feasible solution. Herein, a new Cu<sub>x</sub>O and g-C<sub>3</sub>N<sub>4</sub> codoped bamboo charcoal (BC) composite (Cu-g-C<sub>3</sub>N<sub>4</sub>/BC) was prepared by the in-situ pyrolysis of Cu<sup>2+</sup>/melamine modified bamboo powders in N<sub>2</sub> atmosphere. Under the catalysis of Cu-g-C<sub>3</sub>N<sub>4</sub>/BC(600)/H<sub>2</sub>O<sub>2</sub> system, the methylene blue (MB) and rhodamine B (RhB) dyes can be completely degraded within 10 min, and the methyl orange (MO) can be degraded within 30 min, indicating a high catalytic efficiency of the catalyst. Electron paramagnetic resonance (EPR) tests and active species trapping experiments suggested that ∙OH was the main active species in the degradation process, while the <strong>·</strong>O<sub>2</sub><sup>−</sup> and h<sup>+</sup> played a minor role. The synergy of Cu<sub>2</sub>O, CuO and g-C<sub>3</sub>N<sub>4</sub> active sites in Cu-g-C<sub>3</sub>N<sub>4</sub>/BC increases the density of photogenerated electrons and promotes the separation of electron-hole pairs via the heterojunctions. The bamboo charcoal matrix plays an important role in the process of adsorbing the dyes and H<sub>2</sub>O<sub>2</sub>, which greatly promotes the activation of H<sub>2</sub>O<sub>2</sub> and the degradation of dyes. In addition, the high conductivity of bamboo charcoal facilitates the charge transfer from the active sites to H<sub>2</sub>O<sub>2</sub>. The as-prepared Cu-g-C<sub>3</sub>N<sub>4</sub>/BC catalyst exhibits good reusability due to its structural stability. This work offers a promising bamboo charcoal catalyst with multiple active sites for the rapid elimination of persistent organic pollutants.</p></div>","PeriodicalId":22097,"journal":{"name":"Sustainable Materials and Technologies","volume":null,"pages":null},"PeriodicalIF":8.6000,"publicationDate":"2024-08-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Sustainable bamboo charcoal based nanocomposite catalysts for rapid adsorption and photo-Fenton degradation of toxic dyes\",\"authors\":\"\",\"doi\":\"10.1016/j.susmat.2024.e01080\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><p>To efficiently and completely remove organic pollutants from water, developing composite catalysts with both adsorption and photocatalytic/Fenton catalytic degradation is a very feasible solution. Herein, a new Cu<sub>x</sub>O and g-C<sub>3</sub>N<sub>4</sub> codoped bamboo charcoal (BC) composite (Cu-g-C<sub>3</sub>N<sub>4</sub>/BC) was prepared by the in-situ pyrolysis of Cu<sup>2+</sup>/melamine modified bamboo powders in N<sub>2</sub> atmosphere. Under the catalysis of Cu-g-C<sub>3</sub>N<sub>4</sub>/BC(600)/H<sub>2</sub>O<sub>2</sub> system, the methylene blue (MB) and rhodamine B (RhB) dyes can be completely degraded within 10 min, and the methyl orange (MO) can be degraded within 30 min, indicating a high catalytic efficiency of the catalyst. Electron paramagnetic resonance (EPR) tests and active species trapping experiments suggested that ∙OH was the main active species in the degradation process, while the <strong>·</strong>O<sub>2</sub><sup>−</sup> and h<sup>+</sup> played a minor role. The synergy of Cu<sub>2</sub>O, CuO and g-C<sub>3</sub>N<sub>4</sub> active sites in Cu-g-C<sub>3</sub>N<sub>4</sub>/BC increases the density of photogenerated electrons and promotes the separation of electron-hole pairs via the heterojunctions. The bamboo charcoal matrix plays an important role in the process of adsorbing the dyes and H<sub>2</sub>O<sub>2</sub>, which greatly promotes the activation of H<sub>2</sub>O<sub>2</sub> and the degradation of dyes. In addition, the high conductivity of bamboo charcoal facilitates the charge transfer from the active sites to H<sub>2</sub>O<sub>2</sub>. The as-prepared Cu-g-C<sub>3</sub>N<sub>4</sub>/BC catalyst exhibits good reusability due to its structural stability. This work offers a promising bamboo charcoal catalyst with multiple active sites for the rapid elimination of persistent organic pollutants.</p></div>\",\"PeriodicalId\":22097,\"journal\":{\"name\":\"Sustainable Materials and Technologies\",\"volume\":null,\"pages\":null},\"PeriodicalIF\":8.6000,\"publicationDate\":\"2024-08-08\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Sustainable Materials and Technologies\",\"FirstCategoryId\":\"5\",\"ListUrlMain\":\"https://www.sciencedirect.com/science/article/pii/S2214993724002604\",\"RegionNum\":2,\"RegionCategory\":\"工程技术\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q1\",\"JCRName\":\"ENERGY & FUELS\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Sustainable Materials and Technologies","FirstCategoryId":"5","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S2214993724002604","RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"ENERGY & FUELS","Score":null,"Total":0}
Sustainable bamboo charcoal based nanocomposite catalysts for rapid adsorption and photo-Fenton degradation of toxic dyes
To efficiently and completely remove organic pollutants from water, developing composite catalysts with both adsorption and photocatalytic/Fenton catalytic degradation is a very feasible solution. Herein, a new CuxO and g-C3N4 codoped bamboo charcoal (BC) composite (Cu-g-C3N4/BC) was prepared by the in-situ pyrolysis of Cu2+/melamine modified bamboo powders in N2 atmosphere. Under the catalysis of Cu-g-C3N4/BC(600)/H2O2 system, the methylene blue (MB) and rhodamine B (RhB) dyes can be completely degraded within 10 min, and the methyl orange (MO) can be degraded within 30 min, indicating a high catalytic efficiency of the catalyst. Electron paramagnetic resonance (EPR) tests and active species trapping experiments suggested that ∙OH was the main active species in the degradation process, while the ·O2− and h+ played a minor role. The synergy of Cu2O, CuO and g-C3N4 active sites in Cu-g-C3N4/BC increases the density of photogenerated electrons and promotes the separation of electron-hole pairs via the heterojunctions. The bamboo charcoal matrix plays an important role in the process of adsorbing the dyes and H2O2, which greatly promotes the activation of H2O2 and the degradation of dyes. In addition, the high conductivity of bamboo charcoal facilitates the charge transfer from the active sites to H2O2. The as-prepared Cu-g-C3N4/BC catalyst exhibits good reusability due to its structural stability. This work offers a promising bamboo charcoal catalyst with multiple active sites for the rapid elimination of persistent organic pollutants.
期刊介绍:
Sustainable Materials and Technologies (SM&T), an international, cross-disciplinary, fully open access journal published by Elsevier, focuses on original full-length research articles and reviews. It covers applied or fundamental science of nano-, micro-, meso-, and macro-scale aspects of materials and technologies for sustainable development. SM&T gives special attention to contributions that bridge the knowledge gap between materials and system designs.