期刊
LANGMUIR
卷 38, 期 10, 页码 3139-3148出版社
AMER CHEMICAL SOC
DOI: 10.1021/acs.langmuir.1c03127
关键词
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资金
- IISER Pune
- UK-India SUNRISE program
- Department of Atomic Energy (DAE)
In this study, a novel carbon nitride material g-C3N5 was investigated for the photocatalytic conversion of CO2 into CH4 under visible light illumination. g-C3N5 exhibited significantly higher methane production rate and selectivity compared to traditional materials. The performance of g-C3N5 was further enhanced by 1% K doping, without compromising its selectivity, and the K-doped g-C3N5 also showed improved photostability.
Establishment of an efficient and robust artificial photocatalytic system to convert solar energy into chemical fuels through CO2 conversion is a cherished goal in the fields of clean energy and environmental protection. In this work, we have explored an emergent low-Z nitrogen-rich carbon nitride material g-C3N5 (analogue of g-C3N4) for CO2 conversion under visible light illumination. A significant enhancement of the CH4 production rate was detected for g-C3N5 in comparison to that of g-C3N4. Notably, g-C3N5 also showed a very impressive selectivity of 100% toward CH4 as compared to 21% for g-C3N4. The photocatalytic CO2 conversion was performed without using sacrificial reagents. We found that 1% K doping in g-C3N5 enhanced its performance even further without compromising the selectivity. Moreover, 1% K-doped g-C3N5 also exhibited better photostability than undoped g-C3N5. We have also employed density functional theory calculation-based analyses to understand and elucidate the possible reasons for the better photocatalytic performance of K-doped g-C3N5.
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