Fabrication and photocatalytic properties of novel ZnO/ZnAl2O4 nanocomposite with ZnAl2O4 dispersed inside ZnO network
Fabrication and photocatalytic properties of novel ZnO/ZnAl2O4 nanocomposite with ZnAl2O4 dispersed inside ZnO network
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DOI：
10.1002/aic.12597
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发表时间：
2012-02
期刊：
影响因子：
3.7
通讯作者：
Xiaofei Zhao;Lei Wang;Xin Xu;Xiaodong Lei;Sailong Xu;Fazhi Zhang
中科院分区：
文献类型：
--
作者：
Xiaofei Zhao;Lei Wang;Xin Xu;Xiaodong Lei;Sailong Xu;Fazhi Zhang
采用单源锌铝层状双氢氧化物(ZnAl-LDHs)为前驱体，在800℃的热处理条件下，制备了锌铝纳米粒子均匀分散在网络中的新型氧化锌/铝酸锌纳米复合材料，研究了锌铝比对纳米复合材料的结构、组成、形貌、织构、紫外吸收性能和光催化活性的影响。结果表明，由ZnAl-LDHs前驱体制备的氧化锌/锌铝氧化物纳米复合材料的光催化性能优于化学共沉淀法或物理混合法制备的单相氧化锌或类似的氧化锌/铝酸锌纳米复合材料。异质结纳米结构和由ZnAl-LDHs前驱体形成的氧化锌和锌铝氧化物之间的强耦合有助于光生电子和空穴之间的有效空间分离，从而提高光催化活性。©2011美国化学工程师学会AICHE J，2012
Novel ZnO/ZnAl2O4 nanocomposites with ZnAl2O4 nanoparticles homogeneously dispersed inside a network of ZnO are fabricated by thermal treatment of a single-source precursor of ZnAl-layered double hydroxides (ZnAl-LDHs) at 800°C. The effects of the Zn/Al molar ratio of the LDH precursors on the structure, composition, morphology, textural as well as UV-absorbing properties and photocatalytic activities of the nanocomposites are investigated in detail. The results show that the ZnO/ZnAl2O4 nanocomposites derived from the ZnAl-LDHs precursors have superior photocatalytic performances to either single phase ZnO or similar ZnO/ZnAl2O4 samples fabricated by chemical coprecipitation or physical mixing method. The heterojunction nanostructure and the strong coupling between the ZnO and ZnAl2O4 phase derived from ZnAl-LDHs precursors are proposed to contribute the efficient spatial separation between the photo-generated electrons and holes, which can concomitantly improve the photocatalytic activities. © 2011 American Institute of Chemical Engineers AIChE J, 2012