School of Public Health, University of South China, Hengyang 421001, RP China.
J Biomed Nanotechnol. 2009 Oct;5(5):521-7. doi: 10.1166/jbn.2009.1060.
An iodine and boron co-doped TiO2 photocatalyst was prepared by the hydrolyzation-precipitation method. X-ray diffraction (XRD), ultraviolet-visible diffuse reflectance spectroscopy (UV-Vis DRS), and X-ray photoelectron spectroscopy (XPS) were applied to characterize the crystalline structure, light absorbing ability, and the chemical state of iodine and boron in the photocatalysts. The results of photocatalytic degradation of methyl orange demonstrated that the I-B-TiO2 catalyst prepared at 400 degrees C for 3 h exhibited the highest photocatalytic activity with a methyl orange degradation ratio of 61% under visible-light (lambda > or = 420 nm) irradiation for 120 min. The characterization results revealed that I-B-TiO2 is in conformity with the anatase TiO2 and that the doping of iodine and boron ions could efficiently inhibit the grain growth. Doped iodine was present in the multivalent forms of 17+, I- and I5+. Doped boron was present as B3+ in an as-prepared sample, forming a possible chemical environment such as B-O-Ti. Overall, the doping of I and B enhanced the ability of TiO2 to absorb visible-light, and it was observed that the photocatalytic activity of I-B-TiO2 was enhanced by the synergistic effect of I and B.
采用水解沉淀法制备了碘硼共掺杂 TiO2 光催化剂。采用 X 射线衍射（XRD）、紫外-可见漫反射光谱（UV-Vis DRS）和 X 射线光电子能谱（XPS）对催化剂的晶体结构、光吸收能力以及碘和硼的化学状态进行了表征。光催化降解甲基橙的结果表明，在 400℃下煅烧 3 h 制得的 I-B-TiO2 催化剂在可见光（lambda > or = 420nm）照射 120min 下，对甲基橙的降解率最高，可达 61%。表征结果表明，I-B-TiO2 符合锐钛矿 TiO2 结构，且掺杂碘和硼离子能有效抑制晶粒生长。掺杂的碘以 17+、I-和 I5+的多价态形式存在。掺杂的硼在未处理的样品中以 B3+形式存在，形成了 B-O-Ti 等可能的化学环境。总的来说，I 和 B 的掺杂增强了 TiO2 吸收可见光的能力，并且观察到 I-B-TiO2 的光催化活性是通过 I 和 B 的协同作用增强的。
