当前位置：
X-MOL 学术
›
Environ. Sci.: Nano
›
论文详情
Our official English website, www.x-mol.net, welcomes your
feedback! (Note: you will need to create a separate account there.)
Enhanced photocatalytic activity and easy recovery of visible light active MoSe2/BiVO4 heterojunction immobilized on Luffa cylindrica – experimental and DFT study
Environmental Science: Nano ( IF 5.8 ) Pub Date : 2021-08-30 , DOI: 10.1039/d1en00578b Harshita Chawla 1 , Meghna Saha 1 , Sumant Upadhyay 2 , Jyoti Rohilla 3 , Pravin Popinand Ingole 3 , Andras Sapi 4 , Imre Szenti 4 , Mohit Yadav 4 , Vasily T. Lebedev 5 , Amrish Chandra 6 , Seema Garg 1
Environmental Science: Nano ( IF 5.8 ) Pub Date : 2021-08-30 , DOI: 10.1039/d1en00578b Harshita Chawla 1 , Meghna Saha 1 , Sumant Upadhyay 2 , Jyoti Rohilla 3 , Pravin Popinand Ingole 3 , Andras Sapi 4 , Imre Szenti 4 , Mohit Yadav 4 , Vasily T. Lebedev 5 , Amrish Chandra 6 , Seema Garg 1
Affiliation
|
Nanostructured bismuth vanadate (BiVO4) and molybdenum diselenide (MoSe2) heterostructures were prepared by varying the concentration of MoSe2 from 0.05 to 0.2 mol%. The synthesized photocatalysts were used to degrade methylene blue (MB) and phenol and the best activity was found for the 0.15 mol% MoSe2/BiVO4 heterostructure. To address the recovery issue of the photocatalyst from the slurry, 0.15 mol% MoSe2/BiVO4 was immobilized on Luffa cylindrica, which not only solved the recovery problem but also increased the photocatalytic efficiency. The immobilized material showed degradation of MB and phenol up to ∼97% within 2 hours of visible light irradiation. The as-prepared samples were characterized for scanning electron microscopy (SEM), transmission electron microscopy (TEM), X-ray photoelectron spectroscopy (XPS), X-ray diffraction (XRD), Brunauer–Emmett–Teller (BET) technique, diffuse reflectance spectroscopy (DRS), and Fourier transformation infrared (FT-IR) spectroscopy to study the improved catalytic efficiency and gain a deeper understanding of interface formation in the heterojunction. Photoelectrochemical studies were also carried out for all the samples and the highest photocurrent density was achieved in 0.15 mol% MoSe2/BiVO4 compared to other samples. Calculations based on first-principles density functional theory (DFT) have also provided an insightful understanding of the interface formation, physical mechanism, and superior photocatalytic performance of the MoSe2@BiVO4 heterostructure over other samples.
中文翻译：
增强的光催化活性和固定在丝瓜上的可见光活性 MoSe2/BiVO4 异质结的容易恢复 - 实验和 DFT 研究
纳米结构的钒酸铋 (BiVO 4 ) 和二硒化钼 (MoSe 2 ) 异质结构是通过将 MoSe 2的浓度从 0.05 mol%改变到 0.2 mol% 来制备的。合成的光催化剂用于降解亚甲蓝 (MB) 和苯酚，发现 0.15 mol% MoSe 2 /BiVO 4异质结构的活性最佳。为了解决从浆料中回收光催化剂的问题，将 0.15 mol% MoSe 2 /BiVO 4固定在丝瓜上，不仅解决了回收问题，还提高了光催化效率。在可见光照射 2 小时内，固定化材料显示出 MB 和苯酚的降解率高达 97%。对制备的样品进行扫描电子显微镜 (SEM)、透射电子显微镜 (TEM)、X 射线光电子能谱 (XPS)、X 射线衍射 (XRD)、Brunauer-Emmett-Teller (BET) 技术、漫反射反射光谱 (DRS) 和傅里叶变换红外 (FT-IR) 光谱来研究提高的催化效率并更深入地了解异质结中的界面形成。还对所有样品进行了光电化学研究，在 0.15 mol% MoSe 2 /BiVO 4 中实现了最高的光电流密度与其他样品相比。基于第一性原理密度泛函理论 (DFT) 的计算也提供了对 MoSe 2 @BiVO 4异质结构相对于其他样品的界面形成、物理机制和优异光催化性能的深刻理解。
更新日期：2021-09-15
中文翻译：
增强的光催化活性和固定在丝瓜上的可见光活性 MoSe2/BiVO4 异质结的容易恢复 - 实验和 DFT 研究
纳米结构的钒酸铋 (BiVO 4 ) 和二硒化钼 (MoSe 2 ) 异质结构是通过将 MoSe 2的浓度从 0.05 mol%改变到 0.2 mol% 来制备的。合成的光催化剂用于降解亚甲蓝 (MB) 和苯酚，发现 0.15 mol% MoSe 2 /BiVO 4异质结构的活性最佳。为了解决从浆料中回收光催化剂的问题，将 0.15 mol% MoSe 2 /BiVO 4固定在丝瓜上，不仅解决了回收问题，还提高了光催化效率。在可见光照射 2 小时内，固定化材料显示出 MB 和苯酚的降解率高达 97%。对制备的样品进行扫描电子显微镜 (SEM)、透射电子显微镜 (TEM)、X 射线光电子能谱 (XPS)、X 射线衍射 (XRD)、Brunauer-Emmett-Teller (BET) 技术、漫反射反射光谱 (DRS) 和傅里叶变换红外 (FT-IR) 光谱来研究提高的催化效率并更深入地了解异质结中的界面形成。还对所有样品进行了光电化学研究，在 0.15 mol% MoSe 2 /BiVO 4 中实现了最高的光电流密度与其他样品相比。基于第一性原理密度泛函理论 (DFT) 的计算也提供了对 MoSe 2 @BiVO 4异质结构相对于其他样品的界面形成、物理机制和优异光催化性能的深刻理解。
京公网安备 11010802027423号