CAJ | 학술논문

以尿素为N源、以钛酸四丁酯和乙醇为原料,采用溶胶凝胶法制备N掺杂TiO_2,并用浸渍法将TiO_2负载于粒状活性炭上,通过烧结制成N-TiO_2/AC光催化剂.并利用TG-DTA、XRD、BET对催化剂的结构、尺寸等特征进行分析和表征,同时考察了亚甲基蓝溶液初始浓度、催化剂用量、亚甲基蓝溶液pH值、催化剂负载次数对N-TiO_2/AC光催化剂在可见光下降解亚甲基蓝的影响.其结果表明负载于活性炭上的N-TiO_2平均粒径约为9.3nm,晶型为锐钛矿型,其比表面积为746.9m~2/g.最佳条件下在亚甲基蓝溶液初始浓度为100mg/L、制备催化剂用量为0.4g,亚甲基蓝溶液pH值为1.0时,经100W钨灯5h照射后,亚甲基蓝的去除率为91.43%, 相同条件下比N-TiO_2和纯TiO_2催化剂活性分别提高了2.580倍和65.31倍.
이뇨소위N원、이태산사정지화을순위원료,채용용효응효법제비N참잡TiO_2,병용침지법장TiO_2부재우립상활성탄상,통과소결제성N-TiO_2/AC광최화제.병이용TG-DTA、XRD、BET대최화제적결구、척촌등특정진행분석화표정,동시고찰료아갑기람용액초시농도、최화제용량、아갑기람용액pH치、최화제부재차수대N-TiO_2/AC광최화제재가견광하강해아갑기람적영향.기결과표명부재우활성탄상적N-TiO_2평균립경약위9.3nm,정형위예태광형,기비표면적위746.9m~2/g.최가조건하재아갑기람용액초시농도위100mg/L、제비최화제용량위0.4g,아갑기람용액pH치위1.0시,경100W오등5h조사후,아갑기람적거제솔위91.43%, 상동조건하비N-TiO_2화순TiO_2최화제활성분별제고료2.580배화65.31배.
N-doped TiO_2 photocatalysts were fabricated by mixing tetrabutyl titanate with urea in ethanol and water by sol-gel method, and immobilized to granular activated carbon by coating. The prepared N-TiO_2/AC was characterized by XRD, TG-DTA,FT-IR,BET. The effect of various experimental parameters on the photocatalytic activity of N-TiO_2/AC photocatalysts were investigated, which involved loading times, N-TiO_2/AC amount, pH value of methylene blue, and initial concentration of Methylene blue. The results showed that the optimal condition include loading three times, N-TiO_2/AC amount 0.4g, pH value of methylene blue 1, initial concentration of Methylene blue 100mg/L.The sample has anatase crystal structure and the medial diameter is about 9.3nm,BET is about 746.86m~2/g.The photocatalytic ability showed that over 91.43% methylence blue could be degraded after 5h reaction under visible light, and the degradation rate is 65.31 times compared to pure TiO_2, 2.58 times compared to N-TiO_2 in the same condition.