التفاصيل البيبلوغرافية
| العنوان: |
Efficient visible-light-driven photocatalytic hydrogen production from water by using Eosin Y-sensitized novel g-CN/Pt/GO composites. |
| المؤلفون: |
Wang, Peng, Guan, Zhongjie, Li, Qiuye, Yang, Jianjun |
| المصدر: |
Journal of Materials Science; Jan2018, Vol. 53 Issue 1, p774-786, 13p |
| مصطلحات موضوعية: |
PHOTOCATALYSTS, WATER, EOSIN, WRIGHT'S stain, HYDROGEN |
| مستخلص: |
Developing an efficient dye-sensitized photocatalyst for photocatalytic H evolution from water is highly desired. In this study, a novel ternary g-CN/Pt/GO composite was synthesized via a facile liquid-phase sonochemical approach. Pt nanoparticles were firstly deposited on the surfaces and/or interlayer of g-CN by chemical reduction, and then, GO was penetrated through ultrasonic treatment. This preparation method is facilitated to prohibit the agglomeration of g-CN and GO because of their π- π stacking interaction and enhance electrons transport and the adsorption of dye molecules. The Eosin Y-sensitized ternary g-CN/Pt/GO composite shows the highest H production rate of 3.82 mmol·g·h under the optimization conditions, which about 2.1 times and 7.7 times higher than the Eosin Y-sensitized binary g-CN/Pt and GO/Pt photocatalysts, respectively. The improved charge separation efficiency is the main reason for the enhancement in H evolution activity. The apparent quantum efficiency of hydrogen evolution for the Eosin Y-sensitized ternary g-CN/Pt/GO composite is up to 9.7% at 420 nm. Moreover, the sensitized g-CN/Pt/GO composite shows stable photocatalytic activity for H evolution under visible light irradiation. The effect of pH, g-CN/GO weight ratios, Pt loading amounts, dye concentrations, and different type dyes on the H evolution activity was also investigated in detail. [ABSTRACT FROM AUTHOR] |
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| قاعدة البيانات: |
Complementary Index |
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