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Hierarchically ordered macroporous TiO2 architecture via self-assembled strategy for environmental remediation
Chemosphere ( IF 8.8 ) Pub Date : 2021-09-21 , DOI: 10.1016/j.chemosphere.2021.132236
S Athithya 1 , S Harish 1 , H IKeda 2 , M Shimomura 3 , Y Hayakawa 4 , J Archana 1 , M Navaneethan 5
Affiliation  

Hierarchical orderd macroporous TiO2 architecture (HOMTA) was prepared with aid of ethylenediamine (EDA) and investigated the impact of amine molecules on the properties of TiO2 architecture. The different variation of amine molecules (EDA) leads to tunning the morphology under hydrothermal approach which is confirmed by FESEM and TEM analysis. The XRD and Raman studies confirms the crystal structure of anatase and brookite phase of TiO2. The surface of the architecture strongly depended on the concentration of EDA which plays a vital role in surface area which is revealed by Brunauer Emmett-Teller (BET) analysis. The obtained HOMTA was employed as photocatalyst and active photoanode in the dye sensitized solar cells (DSSC). The DSSC device exhibits excellent efficiency (η) of 5.27% for the EDA capped TiO2 (S5) which had high surface area (167.11 m2/g) for better dye loading, whereas the lower concentration of EDA capped TiO2 (S1, S2, S3 and S4) resulted the efficiency of 2.14, 3.90, 3.25 and 4.37%, respectively. The efficiency of photocatlysis degradation of the prepared samples (S1, S2, S3, S4 and S5) was 94.8, 90.47, 91.41, 91.32 and 93.75% under light source. The excellent photocatalysis property was achieved by S5 within 6 min due to high surface area which inducing more active site.



中文翻译:

通过自组装策略进行环境修复的分级有序大孔 TiO2 结构

在乙二胺(EDA)的帮助下制备了分级有序大孔TiO 2结构(HOMTA),并研究了胺分子对TiO 2结构性能的影响。胺分子 (EDA) 的不同变化导致在水热法下调整形态,这通过 FESEM 和 TEM 分析得到证实。XRD 和拉曼研究证实了 TiO 2的锐钛矿和板钛矿相的晶体结构. 结构的表面强烈依赖于 EDA 的浓度,EDA 在表面积中起着至关重要的作用,Brunauer Emmett-Teller (BET) 分析揭示了这一点。获得的HOMTA被用作染料敏化太阳能电池(DSSC)中的光催化剂和活性光阳极。对于具有高表面积 (167.11 m 2 /g)的 EDA 封端的 TiO 2 (S5),DSSC 装置表现出 5.27% 的出色效率 (η),可实现更好的染料负载,而较低浓度的 EDA 封端的 TiO 2(S1、S2、S3 和 S4) 的效率分别为 2.14、3.90、3.25 和 4.37%。制备的样品(S1、S2、S3、S4和S5)在光源下光催化降解效率分别为94.8%、90.47%、91.41%、91.32%和93.75%。由于高表面积导致更多的活性位点,S5 在 6 分钟内实现了优异的光催化性能。

更新日期:2021-10-09
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