非金属元素掺杂纳米二氧化钛

二氧化钛在光电转化、光催化等众多领域具有重要的应用价值,但较宽的禁带宽度和较低的电子传递效率导致其光利用率较低。离子掺杂和纳米化是改变其能带结构、提高电子传输能力的有效策略,根据掺杂离子的性质,可分为金属离子掺杂和非金属元素掺杂。与传统二氧化钛相比,纳米二氧化钛具有特殊的表面效应和粒度效应,其化学活性、耐热性等都强于传统二氧化钛。本文主要对非金属元素掺杂纳米二氧化钛的研究进行评述,包括IIIA、IVA、VA、VIA、VIIA族元素的单一元素掺杂以及和金属或非金属元素共掺杂,重点介绍了纳米二氧化钛的非金属掺杂与其能带结构、可见光响应和光催化性能之间的关系及其应用情况,并对其未来的发展趋势进行了展望。

Non-Metallic Element Doped Titanium Dioxide

Titanium dioxide attracts great attentions for its important applications in many fields, especially in photoelectronic conversion and photocatalysis due to its excellent light stability, non-toxicity and easy preparation. However, its relatively poor charge transport property and wide bandgap are two main limitations for its extensive application in light-responsive materials. To meet such challenges, two strategies including ion doping and going nanoscale are used and demonstrated to be effective in regulating its band gap structure and charge transport behavior. Ion doping can be divided into two categories, metal doping and nonmetal doping, according to the properties of the impurity elements. Besides, compared with traditional titanium dioxide, nano-sized titanium dioxide possesses larger surface areas and special nanosized effect, resulting in higher chemical activity and heat resistance. In this review, we focused on the research progress of non-metallic element doped titanium dioxide because the progress of metal doped titanium dioxide had been reviewed elsewhere. Emphases was put on the relationship within the doping element, the band gap structure, visible light responsibility and photocatalytic performance of the hybrid titanium dioxide. Additionally, the application of non-metallic element doped titanium dioxide was also involved.