Synthesis and enhanced visible-light photocatalytic activity of wollastonite/g-C3N4 composite. (February 2017)

• Record Type: Journal Article
• Authors: Yao, Guangyuan; Sun, Zhiming; Zheng, Shuilin
• Is Part Of: Materials research bulletin. Volume 86(2017)
• Page Start: 186
• Page End: 193
• Publication Date: 2017-02
• Subjects: A. Composites -- B. Chemical synthesis -- B. Optical properties -- D. Catalytic properties -- D. Surface properties; Materials -- Periodicals; Crystal growth -- Periodicals; Matériaux -- Périodiques; Cristaux -- Croissance -- Périodiques; Crystal growth; Materials; Periodicals; 620.11
• DOI: 10.1016/j.materresbull.2016.10.028
• Languages: English
• ISSNs: 0025-5408

Abstract

Graphical abstract: Highlights: Wollastonite/g-C3 N4 was synthesized by a facile process. The Di/Wo(H + )-4:3 sample exhibited the optimal photoactivity. The role of wollastonite in the formation of Di/Wo(H + ) composites was discussed. The enhanced photocatalytic activities and enhancement mechanism were presented. Abstract: The novel wollastonite/g-C3 N4 composites were synthesized via a simple calcination and acid leaching process. The as-prepared photocatalysts were characterized by XRD, HRSEM, PL, UV–vis DRS, ESR and BET. The phtotocatalytic performance of the as-synthesizedcomposites was evaluated by the photodegradation of Rhodamine B under visible light irradiation. The visible-light photocatalytic activity of the as-prepared samples is much higher than that of pure g-C3 N4 . The Di/Wo(H + )-4:3 sample displays the optimal photocatalytic performance towards RhB under visible light and its reaction rate constant is 6.5 times that of pure g-C3 N4 . Meanwhile, the Di/Wo(H + )-4:3 presents a good durability and reusability. The improved photoactivity of the Di/Wo(H + ) composite could be attributed not only to its high surface area and porosity but also to the synergistic effect of the g-C3 N4 and wollastonite, which can effectively promote the separation of photogenerated electron-hole pairs and consequently enhanced its photoactivity.