聚合物模板在 Cu-TiO 异质结纳米结构的晶体结构和光活性中对环境修复的作用。
Role of polymer template in crystal structure and photoactivity of Cu-TiO heterojunction nanostructures towards environmental remediation.
机构信息
Institute for Applied Chemistry, Department of Fine Chemistry, Seoul National University of Science and Technology, 232 Gongneung-ro, Nowon-gu, Seoul, 01811, Republic of Korea.
Materials Chemistry Department, CSIR-Institute of Minerals and Materials Technology, Bhubaneswar, 751 013, Odisha, India.
出版信息
Environ Res. 2023 Sep 1;232:116352. doi: 10.1016/j.envres.2023.116352. Epub 2023 Jun 7.
Exploring porous heterojunction nanomaterials as a photocatalyst for water depollution strategies towards environmental restoration is exceedingly difficult in the perspective of sustainable chemistry. Herein, we first report a porous Cu-TiO (TC40) heterojunction by using microphase separation of a novel penta-block copolymer (PLGA-PEO-PPO-PEO-PLGA) as a template through an evaporation induced self-assembly (EISA) method having nanorod-like particle shape. Furthermore, two types of photocatalyst were made with or without polymer template to clarify the function of that template precursor on the surface and morphology, as well as which variables are the most critical for a photocatalyst. TC40 heterojunction nanomaterial displayed higher BET surface area along with lower band gap value viz.2.98 eV compared to the other and these features make it a robust photocatalyst for wastewater treatment. In order to improve water quality, we have carried out experiments on the photodegradation of methyl orange (MO), highly toxic pollutants that cause health hazards and bioaccumulate in the environment. Our catalyst, TC40 exhibits the 100% photocatalytic efficiency towards MO dye degradation in 40 and 360 min at a rate constant of 0.104 ± 0.007 min and 0.440 ± 0.03 h under UV + Vis and visible light irradiation, respectively.
探索多孔异质结纳米材料作为光催化剂，用于水污染治理策略，以实现环境修复，从可持续化学的角度来看，这是极其困难的。在此，我们首次通过蒸发诱导自组装（EISA）方法，使用新型五嵌段共聚物（PLGA-PEO-PPO-PEO-PLGA）作为模板，制备了多孔 Cu-TiO（TC40）异质结，其具有纳米棒状颗粒形状。此外，我们还制备了两种没有或有聚合物模板的光催化剂，以阐明该模板前体在表面和形态上的作用，以及哪些变量对光催化剂最为关键。TC40 异质结纳米材料具有更高的 BET 比表面积和更低的带隙值（2.98 eV），与其他相比，这些特性使其成为处理废水的强大光催化剂。为了提高水质，我们进行了甲基橙（MO）光降解实验，MO 是高度有毒的污染物，会对健康造成危害，并在环境中积累。我们的催化剂 TC40 在 UV + Vis 和可见光照射下，分别在 40 和 360 分钟内，对 MO 染料降解的光催化效率达到 100%，速率常数分别为 0.104 ± 0.007 min 和 0.440 ± 0.03 h。
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