Cu2O/reduced graphene oxide composites for the photocatalytic conversion of CO2.
Cu2O/reduced graphene oxide composites for the photocatalytic conversion of CO2.
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DOI：
10.1002/cssc.201301194
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发表时间：
2014-04
期刊：
影响因子：
8.4
通讯作者：
Tang, Junwang
中科院分区：
文献类型：
--
作者：
An, Xiaoqiang;Li, Kimfung;Tang, Junwang
采用微波辅助化学法一步合成了Cu 2 O/还原氧化石墨烯（RGO）复合材料。然后在环境条件下研究了结上的光催化CO2还原。RGO涂层显著增加了Cu 2 O对CO2光还原的活性，导致在第20小时中比优化的Cu 2 O高近6倍的活性和比Cu 2 O/RuOx结高50倍的活性。此外，在400 nm处的约0.34%的表观初始量子产率已实现由Cu 2 O/RGO结CO2光还原。该结的光电流几乎是空白Cu_2O光电阴极的两倍。通过XRD、SEM、TEM、X射线光电子能谱、光电化学、光致发光和交流阻抗等表征，证实了Cu 2 O的活性提高和稳定性增强是由于RGO有效的电荷分离和转移以及保护作用。该研究进一步为其他光催化剂改性提供了有用的信息，以有效地减少CO2，而不需要贵金属助催化剂。
A facile one-step microwave-assisted chemical method has been successfully used for the synthesis of Cu2O/reduced graphene oxide (RGO) composites. Photocatalytic CO2 reduction was then investigated on the junction under ambient conditions. The RGO coating dramatically increases Cu2O activity for CO2 photoreduction to result in a nearly six times higher activity than the optimized Cu2O and 50 times higher activity than the Cu2O/RuOx junction in the 20th hour. Furthermore, an apparent initial quantum yield of approximately 0.34 % at 400 nm has been achieved by the Cu2O/RGO junction for CO2 photoreduction. The photocurrent of the junction is nearly double that of the blank Cu2O photocathode. The improved activity together with the enhanced stability of Cu2O is attributed to the efficient charge separation and transfer to RGO as well as the protection function of RGO, which was proved by XRD, SEM, TEM, X-ray photoelectron spectroscopy, photo-electrochemical, photoluminescence, and impedance characterizations. This study further presents useful information for other photocatalyst modification for efficient CO2 reduction without the need for a noble-metal co-catalyst.
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影响因子：
15
作者：
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DOI：
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影响因子：
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