CdS Nanoparticles Exhibiting Quantum Size Effect by Dispersion on TiO2: Photocatalytic H2 Evolution and Photoelectrochemical Measurements
CdS Nanoparticles Exhibiting Quantum Size Effect by Dispersion on TiO2: Photocatalytic H2 Evolution and Photoelectrochemical Measurements
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DOI：
10.1246/bcsj.82.528
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发表时间：
2009-04
影响因子：
4
通讯作者：
K. Ogisu;K. Takanabe;D. Lu;M. Saruyama;Takahiro Ikeda;M. Kanehara;T. Teranishi;K. Domen
中科院分区：
文献类型：
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作者：
K. Ogisu;K. Takanabe;D. Lu;M. Saruyama;Takahiro Ikeda;M. Kanehara;T. Teranishi;K. Domen
以油酸和9-十八烯胺为保护配体，在己烷溶液中制备了具有量子尺寸效应的CdS纳米粒子。我们的研究重点是利用纳米粒子的固有光学性质的光催化析氢和光电化学反应，通过固定氧化物基板和去除保护配体。结果表明，经氧化热处理和碱处理去除保护性配体后，CdS纳米粒子在TiO 2上的固载化仍能保持其原有的粒径和光学性质。可见光下Na 2S-Na 2SO 3溶液的光催化放氢速率受CdS粒径（量子尺寸效应）、CdS负载量和TiO 2比表面积的强烈影响。将CdS/TiO 2喷涂在氟掺杂氧化锡（FTO）电极上，观察到了高的光阳极电流.在这项研究中获得的知识可以扩展到保护性配体覆盖的纳米粒子材料领域的进一步发展。
Uniformly sized CdS nanoparticles exhibiting quantum size effect have been synthesized as a suspension in hexane solution containing oleic acid and 9-octadecenylamine as protective ligands. Our study focuses on utilizing the intrinsic optical property of the nanoparticles for photocatalytic H 2 evolution and photoelectrochemical reaction by immobilizing oxide substrate and removing protective ligands. Immobilized CdS nanoparticles on TiO 2 were found to maintain their original particle size and optical property after impregnation and removal of the protective ligands by oxidative heat treatment and/or alkali treatment. The photocatalytic H 2 evolution rates in Na 2 S-Na 2 SO 3 solution under visible light were strongly affected by the CdS particle size (quantum size effect), CdS loading amount, and TiO 2 surface area. High photoanodic current was observed for CdS/TiO 2 sprayed on a fluoride-doped tin oxide (FTO) electrode, functioning as an n-type semiconductor. The knowledge acquired in this study can be extended for further development in the field of nanoparticle materials covered with protective ligands.