Photocatalytic Activity of Nanostructured Anatase Coatings Obtained by Cold Gas Spray
Photocatalytic Activity of Nanostructured Anatase Coatings Obtained by Cold Gas Spray
复制标题
冷气喷涂纳米结构锐钛矿涂层的光催化活性
DOI：
10.1007/s11666-014-0087-0
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发表时间：
2014
影响因子：
3.1
通讯作者：
J. Guilemany
中科院分区：
文献类型：
--
作者：
M. Gardon;C. Fernández;D. Sousa;J. M. Doña;S. Dosta;I. G. Cano;J. Guilemany
本文描述了一种通过冷气喷涂（CGS）沉积的光催化纳米结构的TiO 2涂层，该涂层支撑在通过大气等离子喷涂（APS）在不锈钢圆筒上获得的低价氧化钛（TiO 2 −x）涂层上。光催化涂层是均匀的，并保留了起始粉末的组成和纳米结构。内部的钛低价氧化物涂层有利于在固态下沉积纳米粒子。团聚的纳米TiO 2颗粒在撞击到APS TiO 2 − x粘结涂层的硬表面时碎裂。由APS提供的粗糙表面提供了一个理想的情况下截留的纳米结构的颗粒，这可能是由于化学键合粘附到粘结涂层;一个可能的键合机制进行了描述。光催化实验表明，CGS纳米TiO 2涂层在水溶液中对苯酚和甲酸具有光催化降解活性。结果与竞争对手的技术和材料（如浸涂P25®光催化剂）获得的性能相似。光活性材料的最终性能的差异可能是由二氧化钛的晶粒尺寸和晶体组成的差异引起的。
This article describes a photocatalytic nanostructured anatase coating deposited by cold gas spray (CGS) supported on titanium sub-oxide (TiO2−x) coatings obtained by atmospheric plasma spray (APS) onto stainless steel cylinders. The photocatalytic coating was homogeneous and preserved the composition and nanostructure of the starting powder. The inner titanium sub-oxide coating favored the deposition of anatase particles in the solid state. Agglomerated nano-TiO2particles fragmented when impacting onto the hard surface of the APS TiO2−xbond coat. The rough surface provided by APS provided an ideal scenario for entrapping the nanostructured particles, which may be adhered onto the bond coat due to chemical bonding; a possible bonding mechanism is described. Photocatalytic experiments showed that CGS nano-TiO2coating was active for photodegrading phenol and formic acid under aqueous conditions. The results were similar to the performance obtained by competitor technologies and materials such as dip-coating P25®photocatalysts. Disparity in the final performance of the photoactive materials may have been caused by differences in grain size and the crystalline composition of titanium dioxide.
影响因子：
1.6
作者：
Fujishima, A;Zhang, XT
通讯作者：
Zhang, XT