نتایج جستجو برای: bismuth vanadate bivo4
تعداد نتایج: 8930 فیلتر نتایج به سال:
Many studies have focused on the use of BiVO4 as a photocatalyst, but few have investigated the production of free radicals during the photocatalytic process. Following synthesis of flowerlike BiVO4 and characterization by X-ray diffraction (XRD), Raman spectroscopy, Scanning electron microscopy (SEM) Scanning electron microscopy (EDX), UV-Vis and XPS, we successfully prepared BiVO4. Then we us...
Reaction kinetics and surface coverage of water oxidation intermediates at a W/Mo-BiVO4 photoanode were studied using surface interrogation scanning electrochemical microscopy (SI-SECM). Adsorbed hydroxyl radicals (OH•) were produced during water oxidation at the semiconductor surface under UV−visible irradiation and were subsequently electrochemically titrated by tip-generated reductant withou...
Carbon quantum dots (CQDs) were demonstrated to have the ability to enhance the photocatalytic performance of monoclinic BiVO4 with different exposed facets under visible light.
We report the first-principles electronic structure of BiVO4, a promising photocatalyst for hydrogen generation. BiVO4 is found to be a direct band gap semiconductor, despite having band extrema away from the Brillouin zone center. Coupling between Bi 6s and O 2p forces an upward dispersion of the valence band at the zone boundary; however, a direct gap is maintained via coupling between V 3d, ...
لایههای نازک بلورهای بیسموت وانادیت (BiVO4) با استفاده از روش هیدروترمال روی زیرلایۀ بدون پوشش FTO به منظور کاربرد در صنایع تصفیۀ آب و تولید هیدروژن نشانده شدهاند. نمونهها پس از لایهنشانی در بازۀ دمایی 450 تا 550 درجۀ سانتیگراد پخت شدهاند. الگوی بلورشناسی اشعۀ ایکس (XRD) که برای لایههای بیسموت وانادیت آماده شده، تأییدکنندۀ ساختار مونوکلینیک این بلور است. تصاویر میکروسکوپ الکترونی روبش...
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