摘要
光催化材料主要用于空气净化、抗菌、废水处理,其产品涉及建筑、交通、农业、工业等。纳米TiO2存在吸收光波范围窄,催化效率低、成本高等缺点。通过金属离子掺杂、晶型控制、不同半导体材料复合、微结构矿物复合等技术催化效率有所提高,吸波范围向可见光移动。但在实际应用中仍然存在严重的不足,如:在应用介质中催化效率下降、载体受到限制和纳米粉体的分散问题;此外,我国目前还没有标准可依等。这些问题都影响了纳米光催化材料的发展。
Nano TiO2 is mainly applied to purify air, kill bacterial, and d ispose wasted water. The application field is extensive, such as buildings, traf fic, agriculture, and industry. In active application, there are some aspects ne eded to be improve, for example, the range of absorbing spectrum is not enough w ide, the photocatalysis efficiency is not enough good, and the cost is very high . The photocatalysis efficiency has been improved, and the absorbing light wave extend to the red by doping with metal ions, controlling crystal types, compound ing other semiconductors, and compounding micro pore canal materials. But some a spects in the application need to be improved such as the decrease of photocatal ysis efficiency on some media, restrict of carrier, and dispersing. In addition, there are no standards for photocatalysis materials and its industry products i n China. These problems or shortages have negative effect on the rapid developme nt of photocatalysis materials in China.
出处
《中国建材科技》
2004年第3期1-4,共4页
China Building Materials Science & Technology
