Gadolinium doped tin dioxide nanoparticles： an efficient visible light active photocatalyst

• Published in: Journal of rare earths Vol. 33; no. 12; pp. 1275 - 1283
• Main Author: Abdullah M A1-Hamdi Mika Sillanpaa Joydeep Dutta
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 01.12.2015
• Subjects: organic by-products; phenol photo-degradation; rare earth dopants; SnO2; solar irradiation; tin dioxide nanoparticles; 二氧化锡; 光催化剂; 光催化降解; 可见光活性; 纳米颗粒; 钆掺杂; 高效液相色谱法; tin dioxide nanoparticles; rare earth dopants; solar irradiation; phenol photo-degradation; organic by-products
• ISSN: 1002-0721; 2509-4963; 2509-4963
• DOI: 10.1016/S1002-0721(14)60557-3

Photocatalytic degradation of phenol with sol-gel prepared rare earth doped tin dioxide （SnO2） nanoparticles was reported. Gadolinium doped tin dioxide （SnO2：Gd） nanoparticles were found to absorb higher visible light compared to lanthanum, neodymium and cerium doped materials that were studied in detail. Photocatalytic degradation of phenol under artificial white light and sunlight in the presence of SnO2：Gd nanoparticles was studied with high performance liquid chromatography （HPLC）, capillary electrophoresis （CE）, total organic carbon （TOC） measurements and the determination of chemical oxygen demand （COD）. Clear correlations be- tween the results obtained from these multiple measurements were found, and a kinetic pathway for the degradation process was pro- posed. Within 150 min of solar irradiation, the TOC of a 10 ppm phenol solution in water was reduced by 95%-99%, thus demon- strating that SnO2：Gd nanoparticles are efficient visible light photocatalysts.