Effects of the structure of the Rh3+ modifier on photocatalytic performances of an Rh3+/TiO2 photocatalyst under irradiation of visible light
Effects of the structure of the Rh3+ modifier on photocatalytic performances of an Rh3+/TiO2 photocatalyst under irradiation of visible light
复制标题
Rh3改性剂结构对可见光照射下Rh3/TiO2光催化剂光催化性能的影响
DOI：
10.1016/j.apcatb.2016.12.047
复制
发表时间：
2017
期刊：
影响因子：
--
通讯作者：
H. Kominami
中科院分区：
文献类型：
--
作者：
S. Kitano;M. Sadakiyo;K. Kato;M. Yamauchi;H. Asakura;T. Tanaka;K. Hashimoto;H. Kominami
对于可见光响应的Rh~(3+)修饰的TiO2光催化剂，考察了Rh3+修饰剂的结构控制以及Rh~(3+)修饰剂结构对光催化活性的影响。在后焙烧过程中预焙烧载体以保持结晶度和比表面积，并在不改变载体结晶度和比表面积的情况下通过后焙烧改变Rh3+/TiO2的结构。在可见光照射下丙酮的矿化反应中，焙烧后的Rh3+/TiO2的光催化活性随焙烧后温度的变化呈现出类似火山的趋势。研究结果表明，Rh3+修饰剂的原子隔离结构更适合于高活性，而Rh物种的聚集导致活性降低。
For a rhodium ion-modified TiO2(Rh3+/TiO2) photocatalyst responding to visible light, control of the structure of the Rh3+modifier and effects of the structures of the Rh3+modifier on photocatalytic activities were examined. A TiO2support was pre-calcined to maintain crystallinity and specific surface area during post-calcination, and the structure of the Rh3+modifier for Rh3+/TiO2was changed by post-calcination without causing changes in the crystallinity and specific surface area of the TiO2support. In mineralization of acetone under irradiation of visible light, the photocatalytic activities of the post-calcined Rh3+/TiO2showed a volcano-like tendency as a function of post-calcination temperature. The results of this study showed that an atomically isolated structure of the Rh3+modifier was preferable for high activities and that aggregation of the Rh species led to a decrease in the activities.