分解水
碳纤维
石墨氮化碳
光催化
纳米
量子效率
可见光谱
材料科学
纳米技术
光催化分解水
纳米点
氮化碳
太阳能
纳米复合材料
人工光合作用
环境友好型
化学
催化作用
化学工程
光电子学
工程类
生物
复合材料
生物化学
生态学
复合数
作者
Juan Liu,Yang Liu,Naiyun Liu,Yuzhi Han,Xing Zhang,Hui Huang,Y. Lifshitz,Shuit‐Tong Lee,Jun Zhong,Zhenhui Kang
出处
期刊:Science
[American Association for the Advancement of Science (AAAS)]
日期:2015-02-27
卷期号:347 (6225): 970-974
被引量:3839
标识
DOI:10.1126/science.aaa3145
摘要
The use of solar energy to produce molecular hydrogen and oxygen (H2 and O2) from overall water splitting is a promising means of renewable energy storage. In the past 40 years, various inorganic and organic systems have been developed as photocatalysts for water splitting driven by visible light. These photocatalysts, however, still suffer from low quantum efficiency and/or poor stability. We report the design and fabrication of a metal-free carbon nanodot-carbon nitride (C3N4) nanocomposite and demonstrate its impressive performance for photocatalytic solar water splitting. We measured quantum efficiencies of 16% for wavelength λ = 420 ± 20 nanometers, 6.29% for λ = 580 ± 15 nanometers, and 4.42% for λ = 600 ± 10 nanometers, and determined an overall solar energy conversion efficiency of 2.0%. The catalyst comprises low-cost, Earth-abundant, environmentally friendly materials and shows excellent stability.
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