Facile fabrication of BUC ‐21/g‐C3N4 composites and their enhanced photocatalytic Cr(VI) reduction performances under simulated sunlight

A series of enhanced photocatalytically active BUC ‐21/g‐C3N4 composites have been prepared via ball ‐milling. The optimal B100G100 exhibited excellent photocatalytic activities for Cr(VI) reduction under the simulated sunlight and real sunlight irradiation, which is obviously superior to pure BUC‐21 and g‐C3N4. Also, the corresponding mechanism was proposed and clarified. A series of BUC ‐21/g‐C3N4 composites were facilely fabricated from two ‐dimensional metal–organic framework BUC‐21 and two‐dimensional metal‐free polymer semiconductor graphitic carbon nitride (g‐C3N4) through ball ‐milling, and characterized via powder X‐ray diffraction, Fourier transform infrared spectrometry, thermogravimetric analysis, transmission electron microscopy, and UV–visible diffuse reflectance, X‐ray photoelectron and photoluminescence emission spectrometry. The photocatalytic activities of B100G100 (weight ratio of BUC‐21 to g‐C3N4 being 1:1) towards Cr(VI) reduction were investigated upon the irradiation of simulated sunlight and real sunlight, in which the influences of various organic compounds (tartaric acid, citric acid and oxalic acid) as hole scavengers, pH values (2, 3, 4, 5, 6, 7 and 8) and foreign ions (ions in tap water and real surface water) were also investigated. The results revealed that B100G100 exhibited more outstanding photocatalytic Cr(VI) reduction than individual BUC ‐21 and g‐C3N4, resulting from enhanced separation of photoge...

Source: Applied Organometallic Chemistry - October 24, 2018 Category: Chemistry Authors: Xiao ‐Hong Yi, Fu‐Xue Wang, Xue‐Dong Du, Peng Wang, Chong‐Chen Wang Tags: FULL PAPER Source Type: research