Visible-light photocatalytic regeneration of NADH using P-doped TiO2 nanoparticles
Visible-light photocatalytic regeneration of NADH using P-doped TiO2 nanoparticles
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DOI：
10.1016/j.molcatb.2006.06.005
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发表时间：
2006-12-04
影响因子：
--
通讯作者：
Li, Jian
中科院分区：
文献类型：
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作者：
Shi, Qing;Yang, Dong;Li, Jian
采用溶胶-凝胶法制备了P掺杂的纳米TiO 2，并通过XRD、BET、SEM、XPS和UV-vis等手段对其进行了表征。结果表明，磷的掺杂可以有效地抑制TiO 2纳米粒子的晶粒生长，提高其比表面积。掺杂的磷以五价氧化态存在，可取代部分Ti4+进入TiO 2晶格。由于P5+可以作为电子陷阱中心接受光电子，其掺杂降低了光生载流子的复合率。此外，P掺杂的TiO 2纳米颗粒在可见光范围内也表现出比纯样品更强的吸收，这是因为在TiO 2的带隙内形成了杂质能级。相应地，P掺杂的TiO 2纳米材料在可见光照射下表现出比纯TiO 2更高的光生NADH能力。(c)2006 Elsevier B. V.保留所有权利。
P-doped TiO2 nanoparticles were prepared by the sol-gel method and characterized by XRD, BET, SEM, XPS and UV-vis spectrum. The results indicated that the doping of phosphorus could efficiently inhibit the grain growth and enhance the surface area of TiO2 nanoparticles. The doped phosphorus was present as the pentavalent-oxidation state, which can replace a part of Ti4+ in the crystal lattice of anatase. Because P5+ can accept photoelectron as the electron trap center, its doping reduces the recombination rate of photogenerated charge carriers. In addition, P-doped TiO2 nanoparticles also show stronger absorption in the visible light range than the pure sample, because of the formation of an impurity energy level within the band gap of TiO2. Correspondingly, P-doped TiO2 nanomaterials show higher ability of NADH photogenenration under visible-light irradiation than pure TiO2. (c) 2006 Elsevier B.V. All rights reserved.