以Web of Science数据库的SCI-E和中文数据库CNKI为数据源,以2000—2017年间所发表的有关超声化学在光催化领域应用的2 219篇SCI及1 079篇中文文献为分析对象,分析了有关文献的时空分布,使用可视化软件CiteSpace V生成了文献共被引图谱...以Web of Science数据库的SCI-E和中文数据库CNKI为数据源,以2000—2017年间所发表的有关超声化学在光催化领域应用的2 219篇SCI及1 079篇中文文献为分析对象,分析了有关文献的时空分布,使用可视化软件CiteSpace V生成了文献共被引图谱以及关键词共现图谱,分析了该领域的研究基础、研究热点以及研究前沿.结果显示,该领域所受到的关注度越来越高,从事该领域研究的国家主要有中国和伊朗;在Web of Science上该领域的研究基础包括5篇奠定性文献和6篇高被引、高中介中心性文献,研究热点主要是超声化学法制备纳米光催化剂,超声降解与光催化降解的耦合以及对偶氮染料的降解,研究前沿主要是在该领域引入响应曲面法以及超声化学法对还原氧化石墨烯、g-C3N4纳米片、异质结光催化剂的制备;CNKI上,该领域的研究基础包括3篇奠定性文献和5篇高被引文献,研究热点主要是超声化学法制备石墨烯复合材料以及对有机染料的降解,研究前沿主要是超声化学法对多元素共掺杂光催化剂、g-C3N4纳米片的制备.展开更多
The K2Ti4O9 whiskers were chosen for the catalyst carrier, TiO2/potassium titanate photocatalyst was prepared by Sol-gel method. The product was characterated by X-ray diffraction and SEM. EDS shows that, the main pec...The K2Ti4O9 whiskers were chosen for the catalyst carrier, TiO2/potassium titanate photocatalyst was prepared by Sol-gel method. The product was characterated by X-ray diffraction and SEM. EDS shows that, the main peck included Ti, O, and K in potassium titanate whisker. The main peak of K disappeared and the peaks of Ti, O stayed after whisker was covered. It directed that the surface of sample was covered by TiO2. XRD shows that diffraction peak appeared, which was corresponded to the peak of anatase TiO2. In the reaction device of photochemistry, using middle-pressure mercury lamp as illumination, rhodamine B as simulant pollutant, the photocatalytic performance of TiO2/potassium titanate was studied. Under the same conditions, the lower pH, the larger illuminance, the higher temperature, the greater aeration quantum and the lower initial concentration of rhodamine B, the higher decoloration rate was got. Under our experiment conditions: pH 6, the illuminance of 250W, the temperature of 313K, and the aeration quantum of 2.0L/min. When the concentration of rhodamine B was 8mg/L The photocatalyst of TiO2/potassium titanate was 0.01g/L. The decoloration rate of TiO2/potassium titanate dealt with the rhodamine B reach over 95% in 160min, and compare with TiO2, the decoloration rate of rhodamine B was improved 0.50~1.91 multiple. TiO2/potassium titanate can be used to treatment of dye wastewater.展开更多
文摘以Web of Science数据库的SCI-E和中文数据库CNKI为数据源,以2000—2017年间所发表的有关超声化学在光催化领域应用的2 219篇SCI及1 079篇中文文献为分析对象,分析了有关文献的时空分布,使用可视化软件CiteSpace V生成了文献共被引图谱以及关键词共现图谱,分析了该领域的研究基础、研究热点以及研究前沿.结果显示,该领域所受到的关注度越来越高,从事该领域研究的国家主要有中国和伊朗;在Web of Science上该领域的研究基础包括5篇奠定性文献和6篇高被引、高中介中心性文献,研究热点主要是超声化学法制备纳米光催化剂,超声降解与光催化降解的耦合以及对偶氮染料的降解,研究前沿主要是在该领域引入响应曲面法以及超声化学法对还原氧化石墨烯、g-C3N4纳米片、异质结光催化剂的制备;CNKI上,该领域的研究基础包括3篇奠定性文献和5篇高被引文献,研究热点主要是超声化学法制备石墨烯复合材料以及对有机染料的降解,研究前沿主要是超声化学法对多元素共掺杂光催化剂、g-C3N4纳米片的制备.
基金The Innovation Foundation of the Ministry of Science and Technology of China (No. 03C26213200932)the Natural Science Foundation of Henan Province (No.0624720029).
文摘The K2Ti4O9 whiskers were chosen for the catalyst carrier, TiO2/potassium titanate photocatalyst was prepared by Sol-gel method. The product was characterated by X-ray diffraction and SEM. EDS shows that, the main peck included Ti, O, and K in potassium titanate whisker. The main peak of K disappeared and the peaks of Ti, O stayed after whisker was covered. It directed that the surface of sample was covered by TiO2. XRD shows that diffraction peak appeared, which was corresponded to the peak of anatase TiO2. In the reaction device of photochemistry, using middle-pressure mercury lamp as illumination, rhodamine B as simulant pollutant, the photocatalytic performance of TiO2/potassium titanate was studied. Under the same conditions, the lower pH, the larger illuminance, the higher temperature, the greater aeration quantum and the lower initial concentration of rhodamine B, the higher decoloration rate was got. Under our experiment conditions: pH 6, the illuminance of 250W, the temperature of 313K, and the aeration quantum of 2.0L/min. When the concentration of rhodamine B was 8mg/L The photocatalyst of TiO2/potassium titanate was 0.01g/L. The decoloration rate of TiO2/potassium titanate dealt with the rhodamine B reach over 95% in 160min, and compare with TiO2, the decoloration rate of rhodamine B was improved 0.50~1.91 multiple. TiO2/potassium titanate can be used to treatment of dye wastewater.
