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All-solid-state Z-scheme WO3 nanorod/ZnIn2S4 composite photocatalysts for the effective degradation of nitenpyram under visible light irradiation.
Journal of Hazardous Materials ( IF 12.2 ) Pub Date : 2019-11-18 , DOI: 10.1016/j.jhazmat.2019.121713 Mengling Tang 1 , Yanhui Ao 1 , Peifang Wang 1 , Chao Wang 1
Journal of Hazardous Materials ( IF 12.2 ) Pub Date : 2019-11-18 , DOI: 10.1016/j.jhazmat.2019.121713 Mengling Tang 1 , Yanhui Ao 1 , Peifang Wang 1 , Chao Wang 1
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A Z-scheme WO3/ZnIn2S4 photocatalyst was synthesized via a simple solvothermal method. Compared with pure WO3 and ZnIn2S4, photocatalytic experiments showed that these Z-scheme photocatalysts exhibited enhanced activity for the degradation of nitenpyram (NTP). The apparent rate constant (k) of NTP degradation on 50WZ (WO3/ 50 wt% Znln2S4) was 0.042 min-1 (∼3.8 times higher than WO3 and ∼2.5 times higher than ZnIn2S4). Photoluminescence (PL), photocurrent (PC), and electrochemical impedance spectroscopy (EIS) showed that the separation and transfer efficiency of photogenerated carriers in 50WZ was markedly enhanced, which was favorable for improving its photocatalytic activity. Active species capture experiments and electron spin resonance (ESR) measurements showed that superoxide radicals and holes were the main active species for NTP degradation, and they confirmed the formation of the Z-scheme structure. Furthermore, a possible NTP degradation pathway was deduced based on the results of high-performance liquid chromatography mass spectrometry (HPLC-MS).
中文翻译：
全固态Z方案WO3纳米棒/ ZnIn2S4复合光催化剂，用于在可见光照射下有效降解Nitenpyram。
通过简单的溶剂热法合成了Z-方案WO3 / ZnIn2S4光催化剂。与纯WO3和ZnIn2S4相比，光催化实验表明，这些Z型光催化剂显示出对乙炔吡喃（NTP）降解的增强活性。NTP在50WZ（WO3 / 50 wt％Znln2S4）上的表观速率常数（k）为0.042 min-1（比WO3高3.8倍，比ZnIn2S4高2.5倍）。光致发光（PL），光电流（PC）和电化学阻抗谱（EIS）表明，光生载流子在50WZ中的分离和转移效率显着增强，有利于提高其光催化活性。活性物种捕获实验和电子自旋共振（ESR）测量表明，超氧自由基和空穴是NTP降解的主要活性物种，他们证实了Z方案结构的形成。此外，根据高效液相色谱质谱法（HPLC-MS）的结果推论出了可能的NTP降解途径。
更新日期：2019-11-18
中文翻译：
全固态Z方案WO3纳米棒/ ZnIn2S4复合光催化剂，用于在可见光照射下有效降解Nitenpyram。
通过简单的溶剂热法合成了Z-方案WO3 / ZnIn2S4光催化剂。与纯WO3和ZnIn2S4相比，光催化实验表明，这些Z型光催化剂显示出对乙炔吡喃（NTP）降解的增强活性。NTP在50WZ（WO3 / 50 wt％Znln2S4）上的表观速率常数（k）为0.042 min-1（比WO3高3.8倍，比ZnIn2S4高2.5倍）。光致发光（PL），光电流（PC）和电化学阻抗谱（EIS）表明，光生载流子在50WZ中的分离和转移效率显着增强，有利于提高其光催化活性。活性物种捕获实验和电子自旋共振（ESR）测量表明，超氧自由基和空穴是NTP降解的主要活性物种，他们证实了Z方案结构的形成。此外，根据高效液相色谱质谱法（HPLC-MS）的结果推论出了可能的NTP降解途径。
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