炭与TiO_2光催化剂复合研究进展

Progress in Composites of Carbon and TiO_2 Photocatalyst

论述了炭与Ti O2光催化剂的复合,炭与Ti O2的复合呈现出多样化的特征,炭不仅可以作为载体,还可以用作包覆层、造孔剂以及掺杂剂。同时炭在复合物中也表现出多种用途,如富集目标污染物、捕获中间产物、抑制热处理时Ti O2的相转变和晶粒长大、拓宽光催化剂的吸收波长到可见光范围等。炭与Ti O2光催化剂的复合将为推动光催化技术的实用化产生积极影响。

In this article, composites of photocatalyst TiO2 and carbon are reviewed. It is pointed out that composites exhibit a diversity of characteristics： carbon is not only used as a support but a coating, pore-formlng agent and doptant. Correspondingly, carbon in the composite has the effects of concentrating the targeted pollutant and capturing intermediate products, besides it has advantages of suppressing the phase transformation from anatase to futile and preventing sintering and crystal growth in TiO2 particles at high temperatures. It can also extend the optical absorption band of composite photocatalyst to the visible spectral region. Therefore, it has a beneficial effect on the practical application of photocatalysis technology for carbon/TiO2 composite photocatalyst.