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Design and facile one-step synthesis of FeWO4/Fe2O3 di-modified WO3 with super high photocatalytic activity toward degradation of quasi-phenothiazine dyes
Applied Catalysis B: Environment and Energy ( IF 22.1 ) Pub Date : 2017-09-09 , DOI: 10.1016/j.apcatb.2017.09.011 Huixiang Wang , Conghui Wang , Xinmin Cui , Li Qin , Ruimin Ding , Liancheng Wang , Zhong Liu , Zhanfeng Zheng , Baoliang Lv
Applied Catalysis B: Environment and Energy ( IF 22.1 ) Pub Date : 2017-09-09 , DOI: 10.1016/j.apcatb.2017.09.011 Huixiang Wang , Conghui Wang , Xinmin Cui , Li Qin , Ruimin Ding , Liancheng Wang , Zhong Liu , Zhanfeng Zheng , Baoliang Lv
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For most of WO3, a visible-light-driven photocatalyst, its barrier in photocatalytic degradation is the low conduction band (CB) potential that can not reduce O2 to O2− and HO2
radicals and thus results in fast recombination of electron/hole. With this in mind, a new active FeWO4/Fe2O3 di-modified WO3 was designed and prepared via by a straightforward but effective strategy by introducing of FeWO4 and Fe2O3 clusters (or nanoparticles) on WO3. The performance of di-modified WO3 showed super high photocatalytic activity in degrading quasi-phenothiazine dyes of Methylene blue (MB), Toluidine blue (TB), AzureⅠ(AI) and Acridine orange (AO) under visible light irradiation, and the corresponding k values are 5.3, 4.4, 3.8 and 5.8 times larger than that of pure WO3, respectively. This improvement was mainly due to the fact that photoexcited electrons can migrate to the matching CB of firmly and highly dispersed FeWO4 and Fe2O3, then be consumed rapidly by a valence decrease from Fe3+ to Fe2+ and Fenton reaction between Fe2+ and H2O2. And the strong adsorption of Fe species toward N and S (or N) elements in quasi-phenothiazine dyes, also positively promoted the efficiency of degradation.
中文翻译：
FeWO 4 / Fe 2 O 3双修饰WO 3的设计和简便一步合成，该WO 3具有对拟吩噻嗪染料降解的超高光催化活性
对于大多数可见光驱动的光催化剂WO 3而言，其光催化降解的障碍是不能将O 2还原为O 2-的低导带（CB）电势。和HO 2自由基并因此导致电子/空穴的快速复合。考虑到这一点，通过在WO 3上引入FeWO 4和Fe 2 O 3簇（或纳米颗粒），通过一种直接但有效的策略，设计和制备了一种新的活性FeWO 4 / Fe 2 O 3双改性WO 3。双改性WO 3在可见光下对亚甲基蓝（MB），甲苯胺蓝（TB），AzureⅠ（AI）和A啶橙（AO）的拟吩噻嗪染料具有超高的光催化活性。ķ该值分别是纯WO 3的5.3、4.4、3.8和5.8倍。这种改善主要是由于以下事实：光激发电子可以迁移到牢固且高度分散的FeWO 4和Fe 2 O 3的匹配CB上，然后通过从Fe 3+到Fe 2+的化合价降低以及Fenton反应迅速被消耗。 Fe 2+和H 2 O 2。Fe离子对准吩噻嗪染料中N和S（或N）元素的强吸附性也积极地促进了降解效率。
更新日期：2017-09-10
radicals and thus results in fast recombination of electron/hole. With this in mind, a new active FeWO4/Fe2O3 di-modified WO3 was designed and prepared via by a straightforward but effective strategy by introducing of FeWO4 and Fe2O3 clusters (or nanoparticles) on WO3. The performance of di-modified WO3 showed super high photocatalytic activity in degrading quasi-phenothiazine dyes of Methylene blue (MB), Toluidine blue (TB), AzureⅠ(AI) and Acridine orange (AO) under visible light irradiation, and the corresponding k values are 5.3, 4.4, 3.8 and 5.8 times larger than that of pure WO3, respectively. This improvement was mainly due to the fact that photoexcited electrons can migrate to the matching CB of firmly and highly dispersed FeWO4 and Fe2O3, then be consumed rapidly by a valence decrease from Fe3+ to Fe2+ and Fenton reaction between Fe2+ and H2O2. And the strong adsorption of Fe species toward N and S (or N) elements in quasi-phenothiazine dyes, also positively promoted the efficiency of degradation.
中文翻译：
FeWO 4 / Fe 2 O 3双修饰WO 3的设计和简便一步合成，该WO 3具有对拟吩噻嗪染料降解的超高光催化活性
对于大多数可见光驱动的光催化剂WO 3而言，其光催化降解的障碍是不能将O 2还原为O 2-的低导带（CB）电势。和HO 2
自由基并因此导致电子/空穴的快速复合。考虑到这一点，通过在WO 3上引入FeWO 4和Fe 2 O 3簇（或纳米颗粒），通过一种直接但有效的策略，设计和制备了一种新的活性FeWO 4 / Fe 2 O 3双改性WO 3。双改性WO 3在可见光下对亚甲基蓝（MB），甲苯胺蓝（TB），AzureⅠ（AI）和A啶橙（AO）的拟吩噻嗪染料具有超高的光催化活性。ķ该值分别是纯WO 3的5.3、4.4、3.8和5.8倍。这种改善主要是由于以下事实：光激发电子可以迁移到牢固且高度分散的FeWO 4和Fe 2 O 3的匹配CB上，然后通过从Fe 3+到Fe 2+的化合价降低以及Fenton反应迅速被消耗。 Fe 2+和H 2 O 2。Fe离子对准吩噻嗪染料中N和S（或N）元素的强吸附性也积极地促进了降解效率。
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