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MOF-Derived In2O3 Microrod-Decorated MgIn2S4 Nanosheets: Z-Scheme Heterojunction for Efficient Photocatalytic Degradation of Tetracycline
Langmuir ( IF 3.7 ) Pub Date : 2023-11-21 , DOI: 10.1021/acs.langmuir.3c02706
Jinhong Liu 1 , Beibei Zhang 1 , Ziyue Huang 1 , Wuyou Wang 1 , Xinguo Xi 2 , Pengyu Dong 3
Langmuir ( IF 3.7 ) Pub Date : 2023-11-21 , DOI: 10.1021/acs.langmuir.3c02706
Jinhong Liu 1 , Beibei Zhang 1 , Ziyue Huang 1 , Wuyou Wang 1 , Xinguo Xi 2 , Pengyu Dong 3
Affiliation
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The construction of Z-scheme heterostructures using matching band semiconductors is an effective strategy for producing highly efficient photocatalysts. In this study, MgIn2S4(MIS) was grown in situ on In2O3 microrods created with an In-based MOF material (In-MIL-68) as a template to successfully establish a unique MIS-In2O3 heterojunction with a well-matched Z-scheme interface charge transfer channel. Tetracycline (TC) as a typical antibiotic was chosen as the target pollutant to evaluate the photocatalytic activity. After 120 min of visible light irradiation, the MIS-In2O3-(10:1) material had the greatest photocatalytic degradation activity of tetracycline with 96.55%, which was 2.39 and 4.26 times that of MIS and In2O3, respectively. The improved photocatalytic activity is attributed to the in situ growth of MIS on In2O3, forming a Z-scheme heterojunction at the interface, which not only increases the specific surface area, exposes the abundant active site, and improves light utilization but also facilitates the migration and separation of photogenic carriers. The photocatalytic degradation products of TC were detected by liquid chromatography–mass spectrometry (LC-MS), and a preliminary degradation pathway was proposed. Radical capture experiments and ESR analysis confirmed that the main active species were holes (h+), superoxide radicals (•O2–), and superoxide and hydroxyl radicals (•OH). Finally, combined with band position analysis, this study proposes a direct Z-scheme heterojunction mechanism to improve the photocatalytic degradation of tetracycline in MIS under visible light.
中文翻译：
MOF 衍生的 In2O3 微棒装饰的 MgIn2S4 纳米片：Z 型异质结可有效光催化降解四环素
使用匹配能带半导体构建Z型异质结构是生产高效光催化剂的有效策略。在本研究中，MgIn 2 S 4 (MIS) 在 In 2 O 3微棒上原位生长，该微棒以 In 基 MOF 材料 (In-MIL-68) 作为模板，成功建立了独特的 MIS-In 2 O 3具有匹配良好的 Z 型界面电荷传输通道的异质结。选择四环素（TC）作为典型抗生素作为目标污染物来评估光催化活性。可见光照射120 min后，MIS-In 2 O 3 -(10:1)材料对四环素的光催化降解活性最大，达到96.55%，分别是MIS和In 2 O 3的2.39和4.26倍。 。光催化活性的提高归因于MIS在In 2 O 3上原位生长，在界面处形成Z型异质结，这不仅增加了比表面积，暴露了丰富的活性位点，提高了光利用率，而且还提高了光催化活性。促进上镜载体的迁移和分离。采用液相色谱-质谱法（LC-MS）检测了TC的光催化降解产物，并提出了初步的降解途径。自由基捕获实验和ESR分析证实，主要活性物种是空穴(h + )、超氧自由基( · O 2 – )、超氧自由基和羟基自由基( · OH)。 最后，结合能带位置分析，本研究提出了直接Z型异质结机制，以改善MIS中四环素在可见光下的光催化降解。
更新日期：2023-11-21
中文翻译：
MOF 衍生的 In2O3 微棒装饰的 MgIn2S4 纳米片：Z 型异质结可有效光催化降解四环素
使用匹配能带半导体构建Z型异质结构是生产高效光催化剂的有效策略。在本研究中，MgIn 2 S 4 (MIS) 在 In 2 O 3微棒上原位生长，该微棒以 In 基 MOF 材料 (In-MIL-68) 作为模板，成功建立了独特的 MIS-In 2 O 3具有匹配良好的 Z 型界面电荷传输通道的异质结。选择四环素（TC）作为典型抗生素作为目标污染物来评估光催化活性。可见光照射120 min后，MIS-In 2 O 3 -(10:1)材料对四环素的光催化降解活性最大，达到96.55%，分别是MIS和In 2 O 3的2.39和4.26倍。 。光催化活性的提高归因于MIS在In 2 O 3上原位生长，在界面处形成Z型异质结，这不仅增加了比表面积，暴露了丰富的活性位点，提高了光利用率，而且还提高了光催化活性。促进上镜载体的迁移和分离。采用液相色谱-质谱法（LC-MS）检测了TC的光催化降解产物，并提出了初步的降解途径。自由基捕获实验和ESR分析证实，主要活性物种是空穴(h + )、超氧自由基( · O 2 – )、超氧自由基和羟基自由基( · OH)。 最后，结合能带位置分析，本研究提出了直接Z型异质结机制，以改善MIS中四环素在可见光下的光催化降解。
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