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Synthesis of new composite based on TiO2 immobilized in glass fibers for photo-catalytic degradation of chlorobenzene in aqueous solutions
Environmental Research ( IF 8.3 ) Pub Date : 2021-09-16 , DOI: 10.1016/j.envres.2021.112018
Ahmad Jonidi Jafari 1 , Mehrdad Moslemzadeh 2 , Ali Esrafili 2 , Roshanak Rezaei Kalantary 2
Affiliation  

In this study photo-catalytic degradation of chlorobenzene from aqueous solutions using CQD decorated Fe-doped TiO2 immobilized in Glass Fibers (GF) was investigated. Characteristics of the synthesized photo-catalyst were determined by EF-SEM, EDX, BET, XRD, FTIR, and DRS analysis. Additionally, DRS analysis demonstrated adding CQD to the TiO2–Fe reduced its band gap energy from 2.96 eV to 2.91eV, while that was 3.10 eV for undoped TiO2. Among that three photo-catalysts, GF/CQD(4.5 wt%) decorated Fe–TiO2 composite had performance nearly 100.0%, when pH was 5 and low concentration of chlorobenzene. In addition, GF/CQD(4.5 wt%) decorated Fe–TiO2 composite show it could be well applied for five times and with a little reduction on the performance. Also, no detectable Fe found to be released from the composite. Minimum inhibitory concentration (MIC) for E. coli bacteria was 12.2 mg L−1 of chlorobenzene residual. Our findings show the catalyst was successful for chlorobenzene removal in the wastewater effluent. In conclusion, present hybrid composite could successfully and safely remove chlorobenzene from synthetic aqueous solution.



中文翻译:

基于玻璃纤维固定二氧化钛的新型复合材料的合成用于光催化降解水溶液中的氯苯

在这项研究中,研究了使用固定在玻璃纤维 (GF) 中的 CQD 修饰的 Fe 掺杂 TiO 2对水溶液中氯苯的光催化降解。通过 EF-SEM、EDX、BET、XRD、FTIR 和 DRS 分析确定了合成的光催化剂的特性。此外,DRS 分析表明,在 TiO 2 -Fe中添加 CQD 可将其带隙能量从 2.96 eV 降低到 2.91 eV,而未掺杂的 TiO 2则为 3.10 eV 。在这三种光催化剂中,GF/CQD (4.5 wt%)修饰的Fe-TiO 2复合材料在pH为5和低浓度氯苯时的性能接近100.0%。此外,GF/CQD (4.5 wt%)修饰了 Fe-TiO 2复合显示它可以很好地应用五次,并且性能略有下降。此外,没有发现从复合材料中释放出可检测到的 Fe。大肠杆菌的最低抑菌浓度 (MIC) 为12.2 mg L -1的氯苯残留物。我们的研究结果表明,该催化剂成功地去除了废水中的氯苯。总之,本杂化复合材料可以成功、安全地从合成水溶液中去除氯苯。

更新日期:2021-09-21
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