Browsing by Author "Yan, Y."
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Item Dual Sensitization Effect and Conductive Structure of Fe₃O₄@mTiO₂/C Photocatalyst Towards Superior Photodegradation Activity for Bisphenol A Under Visible Light(Elsevier B.V., 2019-05-31) Zhao, X.; Wang, R.; Lu, Z.; Wang, Weichao; Yan, Y.; Wang, WeichaoIn this paper, we prepared Fe₃O₄@mTiO₂/C (the mesoporous TiO₂ denoted as mTiO₂) photocatalyst via a simple synthetic method, and it exhibits strong light response under visible light region because of the dual sensitization effect of Fe₃O₄ and carbon. In addition, the composite photocatalyst also has double conductivity, which is beneficial to the transfer and separation of charge carriers due to the synergetic effect of Fe₃O₄, carbon and mTiO₂. As a consequence, the double conductive structure Fe₃O₄@mTiO₂/C photocatalyst displays prominent photocatalytic activity in degradation of BPA under visible light. Furthermore, the photocatalyst not only was recycled easily to reduce the secondary pollution of the environment but also had a superior stability. This work may provide a new inspiration toward constructing dual sensitization and double conductive structure with other semiconductor photocatalyst to effectively improve the photocatalytic activity under visible light for practical application.Item Three-Dimensionally Ordered Macro-/Mesoporous Ni as a Highly Efficient Electrocatalyst for the Hydrogen Evolution Reaction(Royal Society of Chemistry, 2015-04-13) Sun, T.; Zhang, C.; Chen, J.; Yan, Y.; Zakhidov, Anvar A.; Baughman, Ray H.; Xu, L.; 0000 0003 5232 4253 (Baughman, RH); 0000-0003-3983-2229 (Zakhidov, AA); Zakhidov, Anvar A.; Baughman, Ray H.Three-dimensionally (3D) ordered macro-/mesoporous (3DOM/m) Ni is fabricated by the chemical reduction deposition method using lyotropic liquid crystals (LLC) to template the mesostructure within the regular voids of a colloidal crystal (opal). The thereby achieved structural advantages of combining well-ordered bicontinuous mesopores with 3D interconnected periodic macropores, such as abundant exposed catalytically active sites, efficient mass transport, and high electrical conductivity, make this non-noble metal structure an excellent hydrogen evolution reaction (HER) electrocatalyst. The 3DOM/m Ni exhibits a low onset overpotential of 63 mV (vs. RHE) and a small Tafel slope of 52 mV per decade, as well as a long-term durability in alkaline medium. These distinct features of the 3DOM/m Ni render it a promising alternative to Pt-based HER electrocatalysts.