Interfaces and Nanomaterials Laboratory, Department of Chemical Engineering, National Institute of Technology, Rourkela 769008, Orissa, India.
Dalton Trans. 2014 Apr 14;43(14):5526-34. doi: 10.1039/c3dt53311e.
Water pollution by organic pollutants has been a growing global problem in recent years, for which there is a great demand of efficient technologies for wastewater treatment. Remediation of water by photocatalytic oxidation has several advantages over adsorption or any other conventional techniques. This study reports a easy synthesis technique of a sulfur doped hollow TiO2 nanocatalyst for photo degradation of organic dye under solar light. The hollow doped TiO2 nano catalyst has significantly high specific surface area (318.11 m(2) g(-1)) and low band gap (2.5 eV) compared to that of solid particles (130.94 m(2) g(-1) and 3.2 eV respectively), as a result it acts as an efficient photocatalyst under solar light. The methylene blue dye degradation ability of this catalyst is shown to be 98.6% compared to that of standard Degussa P25 (30%) as reported before. Additionally, the catalyst is also able to degrade 71% methylene blue dye during fifth times recycling without any further treatment because of its high surface area. So our sulfur doped hollow TiO2 nanoparticles can be used as a potential photocatalyst for environmental remediation applications.
近年来，有机污染物造成的水污染已成为一个全球性问题，因此人们对高效的废水处理技术有很大的需求。与吸附或任何其他传统技术相比，光催化氧化法在修复水方面有几个优势。本研究报道了一种简便的硫掺杂中空 TiO2 纳米催化剂的合成技术，用于在太阳光下光降解有机染料。与实心颗粒（分别为 130.94 m(2) g(-1) 和 3.2 eV）相比，空心掺杂 TiO2 纳米催化剂具有显著更高的比表面积（318.11 m(2) g(-1)）和更低的带隙（2.5 eV），因此它在太阳光下表现为一种有效的光催化剂。与之前报道的标准 Degussa P25（30%）相比，该催化剂对亚甲基蓝染料的降解能力为 98.6%。此外，由于其高表面积，该催化剂在第五次回收过程中也能够降解 71%的亚甲基蓝染料，无需进一步处理。因此，我们的硫掺杂中空 TiO2 纳米粒子可用作环境修复应用的潜在光催化剂。
