摘要
以三氯化钛为原料、抗坏血酸为燃烧剂,采用燃烧法快速制备乳白色纳米二氧化钛,并采用XRD,IR,UV,SEM等手段对纳米二氧化钛进行表征。最佳的三氯化钛与抗坏血酸的摩尔比为1∶0.6,所得样品的平均粒径为28nm。以制备的纳米二氧化钛为光催化剂、0.01g/L亚甲基蓝溶液为模拟污染水进行光催化研究,考察催化剂用量、双氧水、pH值、转速等对催化效果的影响,得到的最佳实验条件为:催化剂用量3g/L,双氧水与亚甲基蓝溶液的体积比1∶20,pH值9,离心机转速2 000r/min。在此条件下对亚甲基蓝溶液进行光催化处理,在光照时间为240min时亚甲基蓝褪为无色。
With titanium trichloride as feedstock,ascorbic acid as incendiary agent,the synthesis of titanium dioxide by combustion method was carried out rapidly and the prepared samples were characterized by FT-IR,XRD,UV-Vis and SEM.Under the optimal titanium trichloride to ascorbic acid molar ratio of 1∶0.6,the prepared cream white nano-titanium dioxide had an average particle size of 28 nm.Using this titanium dioxide as photo-catalytic catalyst,0.01 g/L methylene blue solution as simulated wastewater,the effect of catalyst dosage,H2O2 amount,system pH value and the rotation speed of centrifuge on the degradation of methylene blue was investigated.Test results showed that the optimum treating conditions were as follows： a catalyst dosage of 3 g/L,H2O2 to methylene blue solution volume ratio of 1∶20,system pH value of 9 and centrifuge rotation speed of 2 000 r/min;treating under such conditions for 240 min,the 0.01 g/L methylene blue solution was degraded to colorless.
出处
《石油炼制与化工》
CAS
CSCD
北大核心
2012年第10期11-15,共5页
Petroleum Processing and Petrochemicals
关键词
纳米二氧化钛
燃烧法
光催化
亚甲基蓝
nano-titanium dioxide
combustion
photocatalysis
methylene blue
