Longyun Li, Kunkun Xiao, Jinpu Zhang, Ruihan Du, Chunli Kang
{"title":"S 型 g-C3N4/PbTiO3 异质结的构建及其在模拟阳光下对有机污染物的高效光催化降解。","authors":"Longyun Li, Kunkun Xiao, Jinpu Zhang, Ruihan Du, Chunli Kang","doi":"10.1007/s11356-024-34987-z","DOIUrl":null,"url":null,"abstract":"<p><p>This study successfully synthesized a composite photocatalyst g-C<sub>3</sub>N<sub>4</sub>/PbTiO<sub>3</sub> through hydrothermal and calcination methods using PbTiO<sub>3</sub> and g-C<sub>3</sub>N<sub>4</sub>. The catalyst was characterized by XRD, FTIR, Raman, XPS, SEM, TEM, UV-vis DRS, PL, and other techniques. The results indicate that the composite photocatalyst exhibits efficient electron transfer, enhanced light absorption, effective separation and utilization of photogenerated electron-hole pairs, demonstrating superior photocatalytic activity. Under simulated sunlight, the removal efficiency of methyl blue (MB) with an initial concentration of 10 mg/L reaches 93.0% after 120 min. After five cycles, the degradation efficiency of MB is 79.2%, still maintaining 85% of the initial catalytic activity. The pH values in the range of 4.0-7.0, inorganic anions, and water quality have a minimal impact on the photocatalytic degradation of MB. Additionally, the composite photocatalyst exhibits strong removal capabilities for other pollutants, such as tetracycline. Therefore, the prepared catalyst demonstrates good feasibility for practical applications. Free radical quenching experiments indicate that hydroxyl radicals (·OH) are the primary active groups in the photocatalytic degradation of MB. Based on this, a photocatalytic mechanism involving a S-scheme heterojunction has been proposed. This study provides new insights into preparing PbTiO<sub>3</sub> composite semiconductors and constructing novel S-scheme heterojunctions.</p>","PeriodicalId":545,"journal":{"name":"Environmental Science and Pollution Research","volume":null,"pages":null},"PeriodicalIF":5.8000,"publicationDate":"2024-10-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Construction of S-scheme g-C<sub>3</sub>N<sub>4</sub>/PbTiO<sub>3</sub> heterojunction and its highly efficient photocatalytic degradation of organic pollutants under simulated sunlight.\",\"authors\":\"Longyun Li, Kunkun Xiao, Jinpu Zhang, Ruihan Du, Chunli Kang\",\"doi\":\"10.1007/s11356-024-34987-z\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<p><p>This study successfully synthesized a composite photocatalyst g-C<sub>3</sub>N<sub>4</sub>/PbTiO<sub>3</sub> through hydrothermal and calcination methods using PbTiO<sub>3</sub> and g-C<sub>3</sub>N<sub>4</sub>. The catalyst was characterized by XRD, FTIR, Raman, XPS, SEM, TEM, UV-vis DRS, PL, and other techniques. The results indicate that the composite photocatalyst exhibits efficient electron transfer, enhanced light absorption, effective separation and utilization of photogenerated electron-hole pairs, demonstrating superior photocatalytic activity. Under simulated sunlight, the removal efficiency of methyl blue (MB) with an initial concentration of 10 mg/L reaches 93.0% after 120 min. After five cycles, the degradation efficiency of MB is 79.2%, still maintaining 85% of the initial catalytic activity. The pH values in the range of 4.0-7.0, inorganic anions, and water quality have a minimal impact on the photocatalytic degradation of MB. Additionally, the composite photocatalyst exhibits strong removal capabilities for other pollutants, such as tetracycline. Therefore, the prepared catalyst demonstrates good feasibility for practical applications. Free radical quenching experiments indicate that hydroxyl radicals (·OH) are the primary active groups in the photocatalytic degradation of MB. Based on this, a photocatalytic mechanism involving a S-scheme heterojunction has been proposed. This study provides new insights into preparing PbTiO<sub>3</sub> composite semiconductors and constructing novel S-scheme heterojunctions.</p>\",\"PeriodicalId\":545,\"journal\":{\"name\":\"Environmental Science and Pollution Research\",\"volume\":null,\"pages\":null},\"PeriodicalIF\":5.8000,\"publicationDate\":\"2024-10-03\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Environmental Science and Pollution Research\",\"FirstCategoryId\":\"93\",\"ListUrlMain\":\"https://doi.org/10.1007/s11356-024-34987-z\",\"RegionNum\":3,\"RegionCategory\":\"环境科学与生态学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"0\",\"JCRName\":\"ENVIRONMENTAL SCIENCES\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Environmental Science and Pollution Research","FirstCategoryId":"93","ListUrlMain":"https://doi.org/10.1007/s11356-024-34987-z","RegionNum":3,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"0","JCRName":"ENVIRONMENTAL SCIENCES","Score":null,"Total":0}
Construction of S-scheme g-C3N4/PbTiO3 heterojunction and its highly efficient photocatalytic degradation of organic pollutants under simulated sunlight.
This study successfully synthesized a composite photocatalyst g-C3N4/PbTiO3 through hydrothermal and calcination methods using PbTiO3 and g-C3N4. The catalyst was characterized by XRD, FTIR, Raman, XPS, SEM, TEM, UV-vis DRS, PL, and other techniques. The results indicate that the composite photocatalyst exhibits efficient electron transfer, enhanced light absorption, effective separation and utilization of photogenerated electron-hole pairs, demonstrating superior photocatalytic activity. Under simulated sunlight, the removal efficiency of methyl blue (MB) with an initial concentration of 10 mg/L reaches 93.0% after 120 min. After five cycles, the degradation efficiency of MB is 79.2%, still maintaining 85% of the initial catalytic activity. The pH values in the range of 4.0-7.0, inorganic anions, and water quality have a minimal impact on the photocatalytic degradation of MB. Additionally, the composite photocatalyst exhibits strong removal capabilities for other pollutants, such as tetracycline. Therefore, the prepared catalyst demonstrates good feasibility for practical applications. Free radical quenching experiments indicate that hydroxyl radicals (·OH) are the primary active groups in the photocatalytic degradation of MB. Based on this, a photocatalytic mechanism involving a S-scheme heterojunction has been proposed. This study provides new insights into preparing PbTiO3 composite semiconductors and constructing novel S-scheme heterojunctions.
期刊介绍:
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