G-C3N4/UiO-66 nanohybrids with enhanced photocatalytic activities for the oxidation of dye under visible light irradiation. (March 2018)

• Record Type: Journal Article
• Authors: Zhang, Xiaodong; Yang, Yang; Huang, Wenyuan; Yang, Yiqiong; Wang, Yuxin; He, Chi; Liu, Ning; Wu, Minghong; Tang, Liang
• Is Part Of: Materials research bulletin. Volume 99(2018)
• Page Start: 349
• Page End: 358
• Publication Date: 2018-03
• Subjects: g-C3N4 -- UiO-66 -- Photocatalysis -- Visible light -- Rhodamine B; Materials -- Periodicals; Crystal growth -- Periodicals; Matériaux -- Périodiques; Cristaux -- Croissance -- Périodiques; Crystal growth; Materials; Periodicals; 620.11
• DOI: 10.1016/j.materresbull.2017.11.028
• Languages: English
• ISSNs: 0025-5408

Abstract

Graphical abstract: Highlights: G-C3 N4 /UiO-66 heterojunctions were synthesized by a facile one-pot method. G-C3 N4 /UiO-66 nanohybrids were used as an visible-light-driven photocatalysts. G-C3 N4 /UiO-66 nanohybrids enhanced the separation of photoexcited carriers. G-C3 N4 /UiO-66 nanohybrids were stable even after the four cycles. Abstract: In this study, g-C3 N4 nanosheets coated UiO-66 nanohybrids were fabricated via a simple solvothermal method. The physicochemical parameters, structural and electrochemical properties of g-C3 N4 /UiO-66 nanohybrids (CNUO-x) were investigated. The nanohybrids were systematically characterized by XRD, FT-IR, TGA, TEM, SEM, EDS elemental mappings, XPS, N2 adsorption-desorption isotherms, PL and DRS. It was found that the addition of moderate g-C3 N4 could enhance the separation and migration rate of photo-induced charges, consequently leading to the increase of photocatalytic efficiency. The CNUO-1 nanohybrid exhibited better photocatalytic activity for the oxidation of Rh B under visible light irradiation, and displayed about 6.0 and 3.3 times faster than that of g-C3 N4 and UiO-66, respectively. Meanwhile, the nanohybrid showed excellent stability and reusability in four cyclic experiments. Finally, the increased photocatalytic reaction mechanism was also proposed. O2 −, h + and OH were further found to be the main active contributors.