Visible light active pristine and extbox>Fe³⁺extbox> doped extbox>CuGa₂O₄extbox> spinel photocatalysts for solar hydrogen production

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• 作者：Karuppasamy Gurunathan ; Jin-Ook Baeg ; Sang Mi Lee ; Esakkiappan Subramanian ; Sang-Jin Moon ; Ki-jeong Kong
• 关键词：Spinels ; Photocatalyst ; e="mml40">e="text-decoration ; none ; color ; black" href="/science?_ob=MathURL&_method=retrieve&_udi=B6V3F-4SG019H-1&_mathId=mml40&_user=1067359&_cdi=5729&_rdoc=4&_acct=C000050221&_version=1&_userid=10&md5=d5c15c13c15e
• 刊名：International Journal of Hydrogen Energy
• 出版年：2008
• 期刊代码：42_03603199
• 类别：ch
• 出版时间：June 2008
• 卷：33
• 期：11
• 页码：2646-2652
• 文件大小：878 K

摘要

Spinel metal oxide photocatalysts, a rarely studied group in visible light driven photocatalytic decomposition of e="mml23">e="text-decoration:none; color:black" href="/science?_ob=MathURL&_method=retrieve&_udi=B6V3F-4SG019H-1&_mathId=mml23&_user=1067359&_cdi=5729&_rdoc=4&_acct=C000050221&_version=1&_userid=10&md5=6857918c886bffe20ed45db2a0028b0c" title="Click to view the MathML source" alt="Click to view the MathML source">H₂S and solar e="mml24">e="text-decoration:none; color:black" href="/science?_ob=MathURL&_method=retrieve&_udi=B6V3F-4SG019H-1&_mathId=mml24&_user=1067359&_cdi=5729&_rdoc=4&_acct=C000050221&_version=1&_userid=10&md5=3332b8481ca7cfa5f5b3e74d2fb6e713" title="Click to view the MathML source" alt="Click to view the MathML source">H₂ production, have been investigated in the present work. e="mml25">e="text-decoration:none; color:black" href="/science?_ob=MathURL&_method=retrieve&_udi=B6V3F-4SG019H-1&_mathId=mml25&_user=1067359&_cdi=5729&_rdoc=4&_acct=C000050221&_version=1&_userid=10&md5=9707fd533aaac2e8ece16f445da5139b" title="Click to view the MathML source" alt="Click to view the MathML source">d¹⁰ p-block element, Ga containing spinel e="mml26">e="text-decoration:none; color:black" href="/science?_ob=MathURL&_method=retrieve&_udi=B6V3F-4SG019H-1&_mathId=mml26&_user=1067359&_cdi=5729&_rdoc=4&_acct=C000050221&_version=1&_userid=10&md5=131e51ea5d35aeaf3bf7101d1d3d49dd" title="Click to view the MathML source" alt="Click to view the MathML source">CuGa₂O₄ in pristine and e="mml27">e="text-decoration:none; color:black" href="/science?_ob=MathURL&_method=retrieve&_udi=B6V3F-4SG019H-1&_mathId=mml27&_user=1067359&_cdi=5729&_rdoc=4&_acct=C000050221&_version=1&_userid=10&md5=9e5f531b5a2043a29a51388f6a7c5910" title="Click to view the MathML source" alt="Click to view the MathML source">Fe³⁺doped (e="mml28">e="text-decoration:none; color:black" href="/science?_ob=MathURL&_method=retrieve&_udi=B6V3F-4SG019H-1&_mathId=mml28&_user=1067359&_cdi=5729&_rdoc=4&_acct=C000050221&_version=1&_userid=10&md5=2a1eb03bb496b808069d170e8fdeaf92" title="Click to view the MathML source" alt="Click to view the MathML source">CuGa_2-xFe_xO₄, e="mml29">e="text-decoration:none; color:black" href="/science?_ob=MathURL&_method=retrieve&_udi=B6V3F-4SG019H-1&_mathId=mml29&_user=1067359&_cdi=5729&_rdoc=4&_acct=C000050221&_version=1&_userid=10&md5=6a1709d9ae720d804b4f64dd740279c5" title="Click to view the MathML source" alt="Click to view the MathML source">x=0.6) states, was prepared by ceramic route without/with noble metal oxide, e="mml30">e="text-decoration:none; color:black" href="/science?_ob=MathURL&_method=retrieve&_udi=B6V3F-4SG019H-1&_mathId=mml30&_user=1067359&_cdi=5729&_rdoc=4&_acct=C000050221&_version=1&_userid=10&md5=95f692fa2cd7994aed998bb73a4d6800" title="Click to view the MathML source" alt="Click to view the MathML source">NiO/RuO₂ loading to the extent of 1 wt%. XRD analysis reveals a single-phase cubic spinel crystalline structure for all the catalysts. FESEM displays an irregular-shaped grain morphology for e="mml31">e="text-decoration:none; color:black" href="/science?_ob=MathURL&_method=retrieve&_udi=B6V3F-4SG019H-1&_mathId=mml31&_user=1067359&_cdi=5729&_rdoc=4&_acct=C000050221&_version=1&_userid=10&md5=71ecb65b201e7f025b142c81363fe936" title="Click to view the MathML source" alt="Click to view the MathML source">CuGa₂O₄ and smaller size almost cubic particles for e="mml32">e="text-decoration:none; color:black" href="/science?_ob=MathURL&_method=retrieve&_udi=B6V3F-4SG019H-1&_mathId=mml32&_user=1067359&_cdi=5729&_rdoc=4&_acct=C000050221&_version=1&_userid=10&md5=7f90b44a72a88c5f570cc97516a33cb6" title="Click to view the MathML source" alt="Click to view the MathML source">CuGa_2-xFe_xO₄. Energy dispersive X-ray spectroscopy suggests a chemical composition consistent with the stoichiometric molecular formula. Optically, the catalysts display an intensive light absorption in UV and visible regions with an onset at about 900 nm in the near IR region. e="mml33">e="text-decoration:none; color:black" href="/science?_ob=MathURL&_method=retrieve&_udi=B6V3F-4SG019H-1&_mathId=mml33&_user=1067359&_cdi=5729&_rdoc=4&_acct=C000050221&_version=1&_userid=10&md5=97ff407af8abbc52fd0325eae10cce1f" title="Click to view the MathML source" alt="Click to view the MathML source">Fe³⁺ doping constructively influences the morphology and optical properties of pristine e="mml34">e="text-decoration:none; color:black" href="/science?_ob=MathURL&_method=retrieve&_udi=B6V3F-4SG019H-1&_mathId=mml34&_user=1067359&_cdi=5729&_rdoc=4&_acct=C000050221&_version=1&_userid=10&md5=101992cf9c86bbdf38e49ed1bd762f17" title="Click to view the MathML source" alt="Click to view the MathML source">CuGa₂O₄. All these physico-chemical and material characteristics infuse a facile catalytic function into the prepared spinel oxides such that the naked e="mml35">e="text-decoration:none; color:black" href="/science?_ob=MathURL&_method=retrieve&_udi=B6V3F-4SG019H-1&_mathId=mml35&_user=1067359&_cdi=5729&_rdoc=4&_acct=C000050221&_version=1&_userid=10&md5=094cd4a9209ca24960dda05eb6602bff" title="Click to view the MathML source" alt="Click to view the MathML source">CuGa₂O₄ and e="mml36">e="text-decoration:none; color:black" href="/science?_ob=MathURL&_method=retrieve&_udi=B6V3F-4SG019H-1&_mathId=mml36&_user=1067359&_cdi=5729&_rdoc=4&_acct=C000050221&_version=1&_userid=10&md5=e81480f1ebba1fffe278fecde8279499" title="Click to view the MathML source" alt="Click to view the MathML source">CuGa_2-xFe_xO₄ spinels exhibit a moderate to fairly good photocatalytic activity while the co-catalyst-loaded e="mml37">e="text-decoration:none; color:black" href="/science?_ob=MathURL&_method=retrieve&_udi=B6V3F-4SG019H-1&_mathId=mml37&_user=1067359&_cdi=5729&_rdoc=4&_acct=C000050221&_version=1&_userid=10&md5=989a6d590085634b52970004106c0b22" title="Click to view the MathML source" alt="Click to view the MathML source">CuGa_2-xFe_xO₄ spinel performs an exceedingly good photocatalytic activity with 15%quantum efficiency. Thus, the present work leads to the emergence of functionally high performance, stable and visible active e="mml38">ef="/science?_ob=MathURL&_method=retrieve&_udi=B6V3F-4SG019H-1&_mathId=mml38&_user=1067359&_cdi=5729&_rdoc=4&_acct=C000050221&_version=1&_userid=10&md5=bb1e7f0c1641b8d7e27c4b19f3a2621a">encedirect.com/cache/MiamiImageURL/B6V3F-4SG019H-1-71/0?wchp=dGLzVzz-zSkzV" alt="View the MathML source" title="View the MathML source" align="absbottom" border="0" height=13 width="73"/> photocatalysts in the spinel group for the production of solar hydrogen from e="mml39">e="text-decoration:none; color:black" href="/science?_ob=MathURL&_method=retrieve&_udi=B6V3F-4SG019H-1&_mathId=mml39&_user=1067359&_cdi=5729&_rdoc=4&_acct=C000050221&_version=1&_userid=10&md5=4c12baabecb7a0db0d9271468988168c" title="Click to view the MathML source" alt="Click to view the MathML source">H₂S.