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Facile Hydrothermal Synthesis of Z-Scheme Bi2Fe4O9/Bi2WO6 Heterojunction Photocatalyst with Enhanced Visible Light Photocatalytic Activity
ACS Applied Materials & Interfaces ( IF 8.3 ) Pub Date : 2018-05-10 00:00:00 , DOI: 10.1021/acsami.8b06128
Bisheng Li 1, 2 , Cui Lai 1, 2 , Guangming Zeng 1, 2 , Lei Qin 1, 2 , Huan Yi 1, 2 , Danlian Huang 1, 2 , Chengyun Zhou 1, 2 , Xigui Liu 1, 2 , Min Cheng 1, 2 , Piao Xu 1, 2 , Chen Zhang 1, 2 , Fanglong Huang 1, 2 , Shiyu Liu 1, 2
ACS Applied Materials & Interfaces ( IF 8.3 ) Pub Date : 2018-05-10 00:00:00 , DOI: 10.1021/acsami.8b06128
Bisheng Li 1, 2 , Cui Lai 1, 2 , Guangming Zeng 1, 2 , Lei Qin 1, 2 , Huan Yi 1, 2 , Danlian Huang 1, 2 , Chengyun Zhou 1, 2 , Xigui Liu 1, 2 , Min Cheng 1, 2 , Piao Xu 1, 2 , Chen Zhang 1, 2 , Fanglong Huang 1, 2 , Shiyu Liu 1, 2
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An efficient binary Bi2Fe4O9/Bi2WO6Z-scheme heterojunction was fabricated through a facile hydrothermal route. The obtained Bi2Fe4O9/Bi2WO6 displays high catalytic activity for rhodamine B (RhB) photodegradation, and 100% of RhB was photodegraded by Bi2Fe4O9 (7%)/Bi2WO6 within 90 min, which is much better than that by pure Bi2Fe4O9 and Bi2WO6. The effective photoinduced carrier separation, the broadened photoabsorption range, high oxidation capacity of hole, and the high reduction power of electron are in charge of the elevated catalytic activity because of the formed Z-scheme system. In addition, the effects such as pollutant concentration, pH, inorganic anions, and water sources exerted on photocatalytic performance were also investigated, and the results suggest that Bi2Fe4O9/Bi2WO6 still possesses a high photocatalytic performance. The free-radical trapping experiments and electron spin resonance spin-trapping technology disclose that hole (h+), hydroxy radical (•OH), and superoxide radical (•O2–) are cardinal active radicals in the catalytic system. In terms of the above experimental analysis, a possible photodegradation mechanism of the as-fabricated photocatalyst is thoroughly elucidated. In addition, the possible RhB photodegradation pathway is also raised in the light of the analysis of liquid chromatography–mass/mass spectrometry. In addition, Bi2Fe4O9/Bi2WO6 composite does not display dramatic reduction of the catalytic performance after five recycles. Thus, this study reveals that the as-obtained Bi2Fe4O9/Bi2WO6 catalyst has a great prospect for the environmental purification.
中文翻译：
可见光光催化活性增强的Z-方案Bi 2 Fe 4 O 9 / Bi 2 WO 6异质结光催化剂的快速水热合成
通过简便的水热法制备了高效的Bi 2 Fe 4 O 9 / Bi 2 WO 6 Z-二元结构异质结。所获得的Bi 2 Fe 4 O 9 / Bi 2 WO 6对若丹明B（RhB）的光分解显示出高催化活性，并且在90℃内，Bi 2 Fe 4 O 9（7％）/ Bi 2 WO 6将100％的RhB光降解。min，比纯Bi 2 Fe 4 O 9和Bi 2更好WO 6。有效的光诱导载流子分离，扩大的光吸收范围，高的空穴氧化能力和高的电子还原能力是由于形成的Z方案体系而提高了催化活性的原因。此外，还研究了污染物浓度，pH，无机阴离子和水源等因素对光催化性能的影响，结果表明Bi 2 Fe 4 O 9 / Bi 2 WO 6仍然具有较高的光催化性能。自由基俘获实验和电子自旋共振自旋俘获技术揭示了空穴（h +），羟基自由基（• OH）和超氧化物自由基（• O 2 –）是催化体系中的主要活性自由基。根据上述实验分析，彻底阐明了所制备的光催化剂可能的光降解机理。此外，根据液相色谱-质谱/质谱法的分析，还提出了可能的RhB光降解途径。此外，Bi 2 Fe 4 O 9 / Bi 2 WO 6复合材料在五个循环后没有显示出催化性能的显着降低。因此，本研究揭示了所获得的Bi 2 Fe 4O 9 / Bi 2 WO 6催化剂在环境净化方面具有广阔的前景。
更新日期：2018-05-10
中文翻译：
可见光光催化活性增强的Z-方案Bi 2 Fe 4 O 9 / Bi 2 WO 6异质结光催化剂的快速水热合成
通过简便的水热法制备了高效的Bi 2 Fe 4 O 9 / Bi 2 WO 6 Z-二元结构异质结。所获得的Bi 2 Fe 4 O 9 / Bi 2 WO 6对若丹明B（RhB）的光分解显示出高催化活性，并且在90℃内，Bi 2 Fe 4 O 9（7％）/ Bi 2 WO 6将100％的RhB光降解。min，比纯Bi 2 Fe 4 O 9和Bi 2更好WO 6。有效的光诱导载流子分离，扩大的光吸收范围，高的空穴氧化能力和高的电子还原能力是由于形成的Z方案体系而提高了催化活性的原因。此外，还研究了污染物浓度，pH，无机阴离子和水源等因素对光催化性能的影响，结果表明Bi 2 Fe 4 O 9 / Bi 2 WO 6仍然具有较高的光催化性能。自由基俘获实验和电子自旋共振自旋俘获技术揭示了空穴（h +），羟基自由基（• OH）和超氧化物自由基（• O 2 –）是催化体系中的主要活性自由基。根据上述实验分析，彻底阐明了所制备的光催化剂可能的光降解机理。此外，根据液相色谱-质谱/质谱法的分析，还提出了可能的RhB光降解途径。此外，Bi 2 Fe 4 O 9 / Bi 2 WO 6复合材料在五个循环后没有显示出催化性能的显着降低。因此，本研究揭示了所获得的Bi 2 Fe 4O 9 / Bi 2 WO 6催化剂在环境净化方面具有广阔的前景。
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