Synergistic effect of efficient adsorption g-C3N4/ZnO composite for photocatalytic property
Synergistic effect of efficient adsorption g-C3N4/ZnO composite for photocatalytic property
复制标题
高效吸附g-C3N4/ZnO复合材料光催化性能的协同效应
DOI：
10.1016/j.jpcs.2013.12.001
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发表时间：
2014-03-01
影响因子：
4
通讯作者：
Kong, Lingnan
中科院分区：
文献类型：
--
作者：
Li, Xuefei;Li, Ming;Kong, Lingnan
以含氧前驱体为原料，在空气中直接热分解尿素，在没有其它模板剂辅助的情况下合成了g-C3 N4/ZnO复合光催化剂。采用单层分散法制备了不同比例的g-C3 N4与ZnO的杂化材料。采用XRD、SEM、UV-vis漫反射光谱（DRS）、FT-IR、TEM和XPS等手段对所制备的g-C3 N4/ZnO复合材料进行了表征。在紫外光和可见光照射下，复合材料对罗丹明B（RhB）的降解效率明显高于ZnO。当g-C3 N4的质量分数为6%时，光催化效率最高。光催化活性的提高可能是由于有机染料与光催化剂之间的直接接触和光子捕获的协同效应。在g-C3 N4界面上光生电子-空穴对的有效分离是提高光催化活性的重要因素。本工作表明g-C3 N4杂化半导体光催化剂在污染物降解方面是一种很有前途的材料。(C)2013爱思唯尔有限公司保留所有权利。
Novel g-C3N4/ZnO composite photocatalyst was synthesized from an oxygen-containing precursor by direct thermal decomposition urea in air without any other templates assistance. Different percentages of g-C3N4 were hybridized with ZnO via the monolayer-dispersed method. The prepared g-C3N4/ZnO composites were characterized by XRD, SEM, UV-vis diffuse reflectance spectra (DRS), FT-IR, TEM and XPS. The composites showed much higher efficiency for degradation of Rhodamine B (RhB) than ZnO under UV and visible light irradiation. Especially, the photocatalytic efficiency was the highest under UV light irradiation when the percentage of g-C3N4 was 6%. The improved photocatalytic activity may be due to synergistic effect of photon acquisition and direct contact between organic dyestuff and photocatalyst Then, effective separation of photogenerated electron-hole pairs at the interface of g-C3N4 is an important factor for improvement of photocatalytic activity. This work indicates that g-C3N4 hybrid semiconductors photocatalyst is a promising material in pollutants degradation. (C) 2013 Elsevier Ltd. All rights reserved.