欢迎您！东篱公司
退出
-
申报数据库
-
立项数据库
-
成果数据库
-
项目获奖数据库
中文摘要：
通过煅烧硫酸钛与氨水水解沉淀物制备氮掺杂TiO2（N—TiO2），用浸溃法制备了铍、氮共掺杂TiO2光催化剂（Be-N—TiO2）。通过可见光光还原沉积法载铂，以可见光（λ≥420nm）光催化制氢为探针反应考察了催化剂的活性，发现当煅烧温度为300℃，Be^2＋的掺杂量为1．59／6（原子分数）时，制备的Pt／Be—N—TiO2制H2活性最高。通过XRD、DRS、FT—IR等手段对掺杂催化剂进行了表征，N掺杂可在TiO2中形成O-Ti—N键，使其具有可见光吸收能力；掺入Be^2＋可以有效的分离光生电子和空穴，减少了两者的复合，同时能够消除由于氮掺杂引入的氧空住，使共掺杂催化剂相对于单一的N—TiO2具有较高的可见光制H2活性。
英文摘要：
The nitrogen doping TiO2 （N-TiO2） was prepared by the calcinations of hydrolysis product of titanium sulphate with aqueous ammonia. Using the N-TiO2 and BeSO4 solution, Be-N-co-doped TiO2 was prepared by impregnation method. The Pt was deposited on Be-N-TiO2 by photochemical deposition with irradiation of visible light. The activities of Pt/Be-N-TiO2 catalyst under visible light（λ≥420nm）were evaluated by photocatalytic hydrogen production. When calcinated temperature is 300℃ and Be doped amount is 1.5ate,the Pt/Be-N-TiO2 have the highest activity for visible light evolvtion of H2. X-ray diffraction, UV-vis diffuse reflectance spectroscopy,fourier transform infrared spectroscopy were used to characterize the catalyst. The results showed that the Ti-O-N bond formed in the catalyst could extend the absorption edge to the visible light region. Due to Be^2＋ doping,the separation of photoinduced electron-hole pairs can be effectively promoted and the oxygen vacancy produced by nitrogen doping can be removed,and thus the evolved H2 activity is improved compared to N-TiO2.
同期刊论文项目
同项目期刊论文
期刊信息
位置：