In,V-codoped TiO2 nanocomposite prepared via a photochemical reduction technique as a novel high efficiency visible-light-driven nanophotocatalyst
In,V-codoped TiO2 nanocomposite prepared via a photochemical reduction technique as a novel high efficiency visible-light-driven nanophotocatalyst
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DOI：
10.1039/c5ra13179k
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发表时间：
2015-09
期刊：
影响因子：
3.9
通讯作者：
V. Jabbari;M. Hamadanian;A. Reisi-Vanani;P. Razi;S. Hoseinifard;D. Villagrán
中科院分区：
文献类型：
--
作者：
V. Jabbari;M. Hamadanian;A. Reisi-Vanani;P. Razi;S. Hoseinifard;D. Villagrán
本研究开发了一系列新型、高效的In、V共掺杂TiO 2光催化剂。采用溶胶-凝胶法和水热法合成了TiO 2纳米粒子，并通过光化学还原法在TiO 2纳米粒子上沉积了不同摩尔百分比（0.1-1%）的钒（V）和铟（In）纳米团簇。采用XRD、SEM、EDX、TEM、XPS和UV-vis DRS等分析手段对所制备的In、V共掺杂TiO 2纳米催化剂进行了表征，并以甲基橙子（MO）为探针污染物考察了其在紫外和可见光照射下的光催化性能。我们的研究表明，在和V的纳米团簇，成功地通过光化学沉积技术沉积在二氧化钛颗粒和金属掺杂轻微抑制二氧化钛晶体生长。光学分析表明，在光吸收光谱中的红移和减少的带隙的In，V-共掺杂的TiO 2催化剂相比，母体TiO 2。XPS研究表明，掺杂元素In和V的氧化态分别为3（InIII）、4（VIV）和5（VV）。MO的光氧化分解表明，In和V的掺杂能显著提高TiO 2的光催化活性。因此，第一次，我们证明，二氧化钛共掺杂的二元金属的In和V可以作为一个高效率的可见光活性的光催化剂。
In the current study, a series of novel, high efficiency photocatalysts of In,V-codoped TiO2 were developed. The TiO2 nanoparticles were synthesized by sol–gel and hydrothermal methods and different molar percentages (0.1–1%) of vanadium (V) and Indium (In) nanoclusters were deposited over the TiO2 nanoparticles via photochemical reduction. XRD, SEM, EDX, TEM, XPS and UV-vis DRS analyses were carried out to characterize the prepared In,V-codoped TiO2 nanocatalysts, and methyl orange (MO) was used as the probe environmental pollutant to test the photocatalytic performance of the prepared catalysts under UV and visible light irradiation. Our study demonstrated that In and V nanoclusters were successfully deposited over TiO2 particles via a photochemical deposition technique and the metal doping slightly suppressed TiO2 crystal growth. The optical analysis showed a red shift in the light absorption spectrum and decrease in the band gap of In,V-codoped TiO2 catalysts compared to that of parent TiO2. XPS study revealed that the doped elements In and V are in oxidation state of 3 (InIII), 4 (VIV) and 5 (VV). The photo-oxidative decomposition of MO showed that doping of In and V can considerably improve the photocatalytic activity of TiO2. Thus, for the first time, we demonstrated that TiO2 codoped with binary metals of In and V can serve as a high efficiency visible-light-active photocatalyst.