Wei-Long Xu, Erwei Du, Sisi Pang, Yuebin Lian, Min Zheng
{"title":"通过电荷转移构建具有光催化活性的 ZnO/C3N4 复合材料","authors":"Wei-Long Xu, Erwei Du, Sisi Pang, Yuebin Lian, Min Zheng","doi":"10.1021/acsanm.4c04416","DOIUrl":null,"url":null,"abstract":"The photocatalyst based on the ZnO/C<sub>3</sub>N<sub>4</sub> composite can harness the high carrier mobility of ZnO along with the visible light absorption characteristics of C<sub>3</sub>N<sub>4</sub>. The key to enhance photocatalytic performance through the synergistic effect of these two materials lies in the effective charge transfer. In this work, a combination of ultrasonic dispersion and hydrothermal method was employed to prepare a ZnO/C<sub>3</sub>N<sub>4</sub> composite. The structure of this composite consists of C<sub>3</sub>N<sub>4</sub> thin layers covering ZnO nanoparticles with a size of several tens of nanometers. Theoretical calculations combined with photoluminescence spectroscopy techniques confirmed that charge transfer occurs in ZnO/C<sub>3</sub>N<sub>4</sub> staggered gap heterojunction, which reduces the recombination of photogenerated carriers and enhances the photocatalytic efficiency. The variations of charge-transfer efficiency in different regions of the ZnO/C<sub>3</sub>N<sub>4</sub> composite were observed by spatially and temporally resolved fluorescence imaging measurements. The photocatalytic degradation of pollutants revealed that the optimal amount of C<sub>3</sub>N<sub>4</sub> is 8%. It achieved an impressive 88% degradation efficiency of the pollutant within 100 min and the fastest degradation rate of 0.022 min<sup>–1</sup> under the solar simulator. This high efficiency is closely associated with the tight integration between ZnO and C<sub>3</sub>N<sub>4</sub> and their effective charge-transfer rates. Furthermore, the ZnO/C<sub>3</sub>N<sub>4</sub> composite demonstrated a stable photocatalytic performance.","PeriodicalId":6,"journal":{"name":"ACS Applied Nano Materials","volume":null,"pages":null},"PeriodicalIF":5.3000,"publicationDate":"2024-09-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Construction of ZnO/C3N4 Composite for Photocatalytic Activity through Charge Transfer\",\"authors\":\"Wei-Long Xu, Erwei Du, Sisi Pang, Yuebin Lian, Min Zheng\",\"doi\":\"10.1021/acsanm.4c04416\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"The photocatalyst based on the ZnO/C<sub>3</sub>N<sub>4</sub> composite can harness the high carrier mobility of ZnO along with the visible light absorption characteristics of C<sub>3</sub>N<sub>4</sub>. The key to enhance photocatalytic performance through the synergistic effect of these two materials lies in the effective charge transfer. In this work, a combination of ultrasonic dispersion and hydrothermal method was employed to prepare a ZnO/C<sub>3</sub>N<sub>4</sub> composite. The structure of this composite consists of C<sub>3</sub>N<sub>4</sub> thin layers covering ZnO nanoparticles with a size of several tens of nanometers. Theoretical calculations combined with photoluminescence spectroscopy techniques confirmed that charge transfer occurs in ZnO/C<sub>3</sub>N<sub>4</sub> staggered gap heterojunction, which reduces the recombination of photogenerated carriers and enhances the photocatalytic efficiency. The variations of charge-transfer efficiency in different regions of the ZnO/C<sub>3</sub>N<sub>4</sub> composite were observed by spatially and temporally resolved fluorescence imaging measurements. The photocatalytic degradation of pollutants revealed that the optimal amount of C<sub>3</sub>N<sub>4</sub> is 8%. It achieved an impressive 88% degradation efficiency of the pollutant within 100 min and the fastest degradation rate of 0.022 min<sup>–1</sup> under the solar simulator. This high efficiency is closely associated with the tight integration between ZnO and C<sub>3</sub>N<sub>4</sub> and their effective charge-transfer rates. Furthermore, the ZnO/C<sub>3</sub>N<sub>4</sub> composite demonstrated a stable photocatalytic performance.\",\"PeriodicalId\":6,\"journal\":{\"name\":\"ACS Applied Nano Materials\",\"volume\":null,\"pages\":null},\"PeriodicalIF\":5.3000,\"publicationDate\":\"2024-09-19\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"ACS Applied Nano Materials\",\"FirstCategoryId\":\"88\",\"ListUrlMain\":\"https://doi.org/10.1021/acsanm.4c04416\",\"RegionNum\":2,\"RegionCategory\":\"材料科学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q2\",\"JCRName\":\"MATERIALS SCIENCE, MULTIDISCIPLINARY\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"ACS Applied Nano Materials","FirstCategoryId":"88","ListUrlMain":"https://doi.org/10.1021/acsanm.4c04416","RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"MATERIALS SCIENCE, MULTIDISCIPLINARY","Score":null,"Total":0}
Construction of ZnO/C3N4 Composite for Photocatalytic Activity through Charge Transfer
The photocatalyst based on the ZnO/C3N4 composite can harness the high carrier mobility of ZnO along with the visible light absorption characteristics of C3N4. The key to enhance photocatalytic performance through the synergistic effect of these two materials lies in the effective charge transfer. In this work, a combination of ultrasonic dispersion and hydrothermal method was employed to prepare a ZnO/C3N4 composite. The structure of this composite consists of C3N4 thin layers covering ZnO nanoparticles with a size of several tens of nanometers. Theoretical calculations combined with photoluminescence spectroscopy techniques confirmed that charge transfer occurs in ZnO/C3N4 staggered gap heterojunction, which reduces the recombination of photogenerated carriers and enhances the photocatalytic efficiency. The variations of charge-transfer efficiency in different regions of the ZnO/C3N4 composite were observed by spatially and temporally resolved fluorescence imaging measurements. The photocatalytic degradation of pollutants revealed that the optimal amount of C3N4 is 8%. It achieved an impressive 88% degradation efficiency of the pollutant within 100 min and the fastest degradation rate of 0.022 min–1 under the solar simulator. This high efficiency is closely associated with the tight integration between ZnO and C3N4 and their effective charge-transfer rates. Furthermore, the ZnO/C3N4 composite demonstrated a stable photocatalytic performance.
期刊介绍:
ACS Applied Nano Materials is an interdisciplinary journal publishing original research covering all aspects of engineering, chemistry, physics and biology relevant to applications of nanomaterials. The journal is devoted to reports of new and original experimental and theoretical research of an applied nature that integrate knowledge in the areas of materials, engineering, physics, bioscience, and chemistry into important applications of nanomaterials.