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Supported TiO2 on Kaolin, Cordierite, and Calcite for Photocatalytic Removal of Dyes from Wastewater
Clean - Soil Air Water ( IF 1.5 ) Pub Date : 2020-03-11 , DOI: 10.1002/clen.201900361 Amal M. Ibrahim 1, 2 , Doaa M. El‐Mekkawi 2 , Mohamed M. Selim 2
Clean - Soil Air Water ( IF 1.5 ) Pub Date : 2020-03-11 , DOI: 10.1002/clen.201900361 Amal M. Ibrahim 1, 2 , Doaa M. El‐Mekkawi 2 , Mohamed M. Selim 2
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Kaolin, cordierite, and calcite are investigated as supports for TiO2. The prepared TiO2/support samples are examined for the removal of organic dyes from wastewater. The samples are preliminarily investigated to identify the optimal loaded system using synthetic wastewater containing methylene blue (MB). Data indicate that the investigated support significantly affects the photocatalytic activity of the supported TiO2. Low photocatalytic activity toward MB degradation is observed upon using TiO2/calcite when compared to the unsupported TiO2. Interaction between calcite and titania species probably occurrs to produce the less photoactive CaTiO3 amorphous species. Anatase TiO2 is obtained upon using kaolin and cordierite as supports. The low photocatalytic performance of the TiO2/kaolin sample is also observed. A high concentration of MB on TiO2/kaolin surfaces blocks the photoactive sites. TiO2/cordierite shows the highest photocatalytic activity compared to the unsupported TiO2 as well as the other TiO2/support samples. Rigid cordierite particles suppress the agglomeration of TiO2 particles during the preparation, leading to a high exposed surface of TiO2 towards light illumination. TiO2/cordierite is investigated for the removal of organic dye from real wastewater collected from a textile dyeing factory. Color removal of up to 46% is achieved upon UV irradiation.
中文翻译：
高岭土，堇青石和方解石上负载的TiO2光催化去除废水中的染料
研究了高岭土，堇青石和方解石作为TiO 2的载体。检查制备的TiO 2 /载体样品中废水中有机染料的去除。初步研究了样品，以确定使用亚甲基蓝（MB）的合成废水的最佳负载系统。数据表明，所研究的载体显着影响了负载型TiO 2的光催化活性。与未负载的TiO 2相比，使用TiO 2 /方解石可观察到对MB降解的低光催化活性。方解石和二氧化钛物种之间可能发生相互作用，从而产生光活性较低的CaTiO 3非晶态物种。锐钛矿型TiO使用高岭土和堇青石作为载体获得2。还观察到了TiO 2 /高岭土样品的低光催化性能。TiO 2 /高岭土表面上的高浓度MB阻止了光敏位点。与未负载的TiO 2和其他TiO 2 /载体样品相比，TiO 2 /堇青石显示出最高的光催化活性。刚性堇青石颗粒在制备过程中抑制了TiO 2颗粒的团聚，导致TiO 2的高暴露表面朝向光照。二氧化钛2对/ cordierite进行了研究，以从纺织印染厂收集的实际废水中去除有机染料。紫外线照射可实现高达46％的脱色效果。
更新日期：2020-03-11
中文翻译：
高岭土，堇青石和方解石上负载的TiO2光催化去除废水中的染料
研究了高岭土，堇青石和方解石作为TiO 2的载体。检查制备的TiO 2 /载体样品中废水中有机染料的去除。初步研究了样品，以确定使用亚甲基蓝（MB）的合成废水的最佳负载系统。数据表明，所研究的载体显着影响了负载型TiO 2的光催化活性。与未负载的TiO 2相比，使用TiO 2 /方解石可观察到对MB降解的低光催化活性。方解石和二氧化钛物种之间可能发生相互作用，从而产生光活性较低的CaTiO 3非晶态物种。锐钛矿型TiO使用高岭土和堇青石作为载体获得2。还观察到了TiO 2 /高岭土样品的低光催化性能。TiO 2 /高岭土表面上的高浓度MB阻止了光敏位点。与未负载的TiO 2和其他TiO 2 /载体样品相比，TiO 2 /堇青石显示出最高的光催化活性。刚性堇青石颗粒在制备过程中抑制了TiO 2颗粒的团聚，导致TiO 2的高暴露表面朝向光照。二氧化钛2对/ cordierite进行了研究，以从纺织印染厂收集的实际废水中去除有机染料。紫外线照射可实现高达46％的脱色效果。
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