Ashil Augustin, Manova Santhosh Yesupatham, M. D. Dhileepan, Sanguk Son, Ezhakudiyan Ravindran, Bernaurdshaw Neppolian, Hyoung-il Kim and Karthikeyan Sekar
{"title":"构建由 C3N5 与 CeO2 结合而成的有机无机杂化复合材料,用于增强光催化氢气进化","authors":"Ashil Augustin, Manova Santhosh Yesupatham, M. D. Dhileepan, Sanguk Son, Ezhakudiyan Ravindran, Bernaurdshaw Neppolian, Hyoung-il Kim and Karthikeyan Sekar","doi":"10.1039/D4YA00476K","DOIUrl":null,"url":null,"abstract":"<p >Energy scarcity and environmental issues can be effectively addressed <em>via</em> photocatalytic hydrogen production. The effective combination of semiconductor materials can prevent exciton recombination, making it a highly effective method for enhancing photocatalytic activity. This study details the synthesis of a conjugated polymer encapsulated with a metal oxide photocatalyst using a simple <em>ex situ</em> method. The encapsulation of the polymer with CeO<small><sub>2</sub></small> nanoparticles resulted in exceptional performance in H<small><sub>2</sub></small> production, exhibiting improved visible light absorption and a significant increase in charge transfer efficiency. This is attributed to the high charge transfer and reduced recombination in the composite. Moreover, photogenerated holes led to a substantial decline in the recombination rate of excitons and concomitant enhancement in the rate of photocatalytic H<small><sub>2</sub></small> production. Markedly, the observed hydrogen evolution for 10 wt% of CeO<small><sub>2</sub></small> doped C<small><sub>3</sub></small>N<small><sub>5</sub></small> composites is 1256 μmol g<small><sup>−1</sup></small> h<small><sup>−1</sup></small>, whereas for C<small><sub>3</sub></small>N<small><sub>5</sub></small>, it is 125 μmol g<small><sup>−1</sup></small> h<small><sup>−1</sup></small>. Electrochemical analysis showed that the optimized composites exhibit a low electron–hole recombination rate, and UV-vis spectroscopic analysis showed improved visible light absorption resulting in excellent photocatalytic activity. Notably, the proposed system offers a novel strategy for hydrogen evolution <em>via</em> photocatalysis using CeO<small><sub>2</sub></small>/C<small><sub>3</sub></small>N<small><sub>5</sub></small> composites. Consequently, this research offers a new perspective on the design of organo–inorganic heterostructures and introduces a novel pathway to explore their catalytic capabilities.</p>","PeriodicalId":72913,"journal":{"name":"Energy advances","volume":null,"pages":null},"PeriodicalIF":3.2000,"publicationDate":"2024-09-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.rsc.org/en/content/articlepdf/2024/ya/d4ya00476k?page=search","citationCount":"0","resultStr":"{\"title\":\"Construction of organic–inorganic hybrid composites derived from C3N5 incorporated with CeO2 for enhanced photocatalytic hydrogen evolution†\",\"authors\":\"Ashil Augustin, Manova Santhosh Yesupatham, M. D. Dhileepan, Sanguk Son, Ezhakudiyan Ravindran, Bernaurdshaw Neppolian, Hyoung-il Kim and Karthikeyan Sekar\",\"doi\":\"10.1039/D4YA00476K\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<p >Energy scarcity and environmental issues can be effectively addressed <em>via</em> photocatalytic hydrogen production. The effective combination of semiconductor materials can prevent exciton recombination, making it a highly effective method for enhancing photocatalytic activity. This study details the synthesis of a conjugated polymer encapsulated with a metal oxide photocatalyst using a simple <em>ex situ</em> method. The encapsulation of the polymer with CeO<small><sub>2</sub></small> nanoparticles resulted in exceptional performance in H<small><sub>2</sub></small> production, exhibiting improved visible light absorption and a significant increase in charge transfer efficiency. This is attributed to the high charge transfer and reduced recombination in the composite. Moreover, photogenerated holes led to a substantial decline in the recombination rate of excitons and concomitant enhancement in the rate of photocatalytic H<small><sub>2</sub></small> production. Markedly, the observed hydrogen evolution for 10 wt% of CeO<small><sub>2</sub></small> doped C<small><sub>3</sub></small>N<small><sub>5</sub></small> composites is 1256 μmol g<small><sup>−1</sup></small> h<small><sup>−1</sup></small>, whereas for C<small><sub>3</sub></small>N<small><sub>5</sub></small>, it is 125 μmol g<small><sup>−1</sup></small> h<small><sup>−1</sup></small>. Electrochemical analysis showed that the optimized composites exhibit a low electron–hole recombination rate, and UV-vis spectroscopic analysis showed improved visible light absorption resulting in excellent photocatalytic activity. Notably, the proposed system offers a novel strategy for hydrogen evolution <em>via</em> photocatalysis using CeO<small><sub>2</sub></small>/C<small><sub>3</sub></small>N<small><sub>5</sub></small> composites. 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Construction of organic–inorganic hybrid composites derived from C3N5 incorporated with CeO2 for enhanced photocatalytic hydrogen evolution†
Energy scarcity and environmental issues can be effectively addressed via photocatalytic hydrogen production. The effective combination of semiconductor materials can prevent exciton recombination, making it a highly effective method for enhancing photocatalytic activity. This study details the synthesis of a conjugated polymer encapsulated with a metal oxide photocatalyst using a simple ex situ method. The encapsulation of the polymer with CeO2 nanoparticles resulted in exceptional performance in H2 production, exhibiting improved visible light absorption and a significant increase in charge transfer efficiency. This is attributed to the high charge transfer and reduced recombination in the composite. Moreover, photogenerated holes led to a substantial decline in the recombination rate of excitons and concomitant enhancement in the rate of photocatalytic H2 production. Markedly, the observed hydrogen evolution for 10 wt% of CeO2 doped C3N5 composites is 1256 μmol g−1 h−1, whereas for C3N5, it is 125 μmol g−1 h−1. Electrochemical analysis showed that the optimized composites exhibit a low electron–hole recombination rate, and UV-vis spectroscopic analysis showed improved visible light absorption resulting in excellent photocatalytic activity. Notably, the proposed system offers a novel strategy for hydrogen evolution via photocatalysis using CeO2/C3N5 composites. Consequently, this research offers a new perspective on the design of organo–inorganic heterostructures and introduces a novel pathway to explore their catalytic capabilities.