Functionalized g-C3N4 sheets assisted synthesis of growth-oriented MIL-88B-Fe with rod-like structure: Upgrading framework photo-catalytic performance and stability

• Published in: Applied surface science Vol. 503; p. 144089
• Main Authors: Liao, Xiaoyuan, Wang, Fan, Wang, Yibei, Wei, Wenjie, Xiao, Zaozao, Liu, Haitang, Hao, Qinglan, Lu, Shuxiang, Li, Zhen
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 15-02-2020
• Subjects: Benzoic acid functionalized g-C3N4; Covalent bond links; Growth-oriented; MIL-88B-Fe; Persulfate; MIL-88B-Fe; Growth-oriented; Covalent bond links; Benzoic acid functionalized g-C3N4; Persulfate
• ISSN: 0169-4332; 1873-5584
• DOI: 10.1016/j.apsusc.2019.144089

•Benzoic acid functionalized g-C3N4 sheets to assisted synthesis of rod-like MIL-88B-Fe.•Rod-like MIL-88B-Fe is with highly exposed (0 0 1) surface.•This material obtained high efficiency and excellent stability.•h+, O2−, SO4− is the predominant active radicals.
In this study, it is first time reported that benzoic acid functionalized g-C3N4 (BF-g-C3N4) sheets assisted synthesis of (0 0 1) surface-oriented MIL-88B-Fe with rod-like structure (BF-CM-rod). Pristine g-C3N4 sheets leaded to produce (1 0 1) surface-oriented MIL-88B-Fe with diamond-like structure (CM-diamond). BF-CM-rod composite catalyst achieves covalent bond links between g-C3N4 and MIL-88B-Fe, performs better separation of h+-e− pairs, and leads to excellent photo-catalytic performance for pollutant removal under visible light irradiation, with persulfate (PS) as oxidant. Its photo-activity is almost 4.2, 2.0 and 1.3 times of g-C3N4, MIL-88B-Fe and CM-diamond, respectively. A possible mechanism is proposed to explain the improved photo-catalytic performance of the Vis/BF-CM-rod/PS system. This work provides a novel way to prepare shape controlled Fe-based metal-organic frameworks formed by covalent bonds.