论文标题
通过单模磁微波辅助TIH2的直接氧化核/壳/壳Ti/Tiox光催化剂的合成
Synthesis of Core/Shell Ti/TiOx Photocatalyst via Single-Mode Magnetic Microwave Assisted Direct Oxidation of TiH2
论文作者
论文摘要
亚微米/壳Ti/Tiox光催化剂通过单模磁微波（SMMW）辅助行星球形tiH2的直接氧化成功合成。 Tiox壳的厚度包括高度浓缩的缺陷，例如Ti3+和/或氧空位，可以通过改变SMMW辅助反应中的治疗时间，在6至18 nm的范围内可控。除了其相当狭窄的光带隙（1.34-2.69 eV）和有效的可见光吸收能力外，亚微米Ti/Tiox颗粒还表现出较高的光催化性能，可在紫外线和可见光光照射下从水和可见光辐照下产生H2产生，以与商业Tio2光催化剂相比（P-25）。由于高度浓缩的表面缺陷和特定的Ti/tiox核/壳结构，可以通过可见光吸收能力和光兴奋的载体分离的协同作用来实现如此出色的性能。
Submicron core/shell Ti/TiOx photocatalyst is successfully synthesized via single-mode magnetic microwave (SMMW) assisted direct oxidation of planetary ball-milled TiH2. The thickness of TiOx shell including highly concentrated defects such as Ti3+ and/or oxygen vacancies is controllable in the range from 6 to over 18 nm by varying the treatment time in the SMMW assisted reaction. In addition to its quite narrow optical bandgap (1.34-2.69 eV) and efficient visible-light absorption capacity, the submicron Ti/TiOx particle exhibits superior photocatalytic performance towards H2 production from water under both UV and visible-light irradiation to compare with a commercial TiO2 photocatalyst (P-25). Such excellent performance can be achieved by the synergetic effect of enhancement in visible light absorption capacity and photo-excited carrier separation because of the highly concentrated surface defects and the specific Ti/TiOx core/shell structure, respectively.
