Photocatalytic destruction of methyl orange by titanium dioxide powder synthesized by an oxalate co-precipitation method

• Main Authors: Pookmanee P., Angkana S., Phanichphant S.
• Format: Conference or Workshop Item
• Language: English
• Published: 2014
• Online Access: http://www.scopus.com/inward/record.url?eid=2-s2.0-75649117415&partnerID=40&md5=d666db87d00161dd1122439fe28a1ff1; http://cmuir.cmu.ac.th/handle/6653943832/6336
• Institution: Chiang Mai University

Titanium dioxide powder was synthesized by an oxalate co-precipitation method with titanium isopropoxide and oxalic acid as the starting precursors. White precipitate was obtained after adding ammonium hydroxide until the final pH of solution was 8 and then calcined at 400-800 °C for 2h. The phase was characterized by X-ray diffraction. Single phase anatase structure was obtained after calcination at 400°C. Multi-phase of anatase and rutile structure was obtained after calcined at 600 and 800°C. The morphology was investigated by scanning electron microscopy. The particle was irregular in shape and highly agglomerate with a range of particle size from 0.1-0.3 μm. The photocatalytic destruction of methyl orange by titanium dioxide was determined by Ultraviolet spectrophotometry. Titanium dioxide powder synthesized by an oxalate co-precipitation method after calcination at 800°C showed the highest photocatalytic activity. © (2010) Trans Tech Publications.