Exploring the enhanced catalytic performance on nitro dyes via a novel template of flake-network Ni-Ti LDH/GO in-situ deposited with Ag3PO4 NPs

• Published in: Applied surface science Vol. 543; p. 148821
• Main Authors: Deng, Huizhen, Yin, Juanjuan, Ma, Jinming, Zhou, Jingxin, Zhang, Lexin, Gao, Lili, Jiao, Tifeng
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 30.03.2021
• Subjects: Ag3PO4/Ni-Ti LDH/GO; Catalyst; Heterojunction structure; Nanocomposite; Heterojunction structure; Nanocomposite; Catalyst; Ag3PO4/Ni-Ti LDH/GO
• ISSN: 0169-4332; 1873-5584
• DOI: 10.1016/j.apsusc.2020.148821

[Display omitted] •Composite catalyst Ag3PO4/Ni-Ti L DH/GO prepared by a simple in-situ deposition method.•Composite catalyst exhibits highly efficient and sustainable catalytic activity.•Provide new clue for the design of new Ag3PO4-based hybrid photocatalysts. A novel catalyst composed of Ag3PO4 bridged by Ni/Ti LDH-graphene heterojunction structure was successfully prepared by a simple in-situ deposition method, which has excellent catalytic performance for 4-NP and 2-NA. Various characterizations to the samples such as XRD, SEM, TEM, STEM-EDS, XPS, TG–DSC, and UV–vis DRS were adopted. Because the ternary structure is mixed with each other to form more heterojunctions and higher specific surface area, the ternary composite Ag3PO4/Ni-Ti LDH/GO has excellent catalytic and cycle performance. Compared to the precursors Ag3PO4/GO and Ni-Ti LDH/GO, the finally as-obtained nanocomposite Ag3PO4/Ni-Ti LDH/GO degraded 4-NP and 2-NA solutions represented more dominant degradation efficiency. In addition, the pseudo-first-order rate constants of the composite catalyst for 4-NP and 2-NA are 0.178 min−1 and 0.089 min−1, respectively. The complex and irregular surfaces of Ni-Ti LDH/GO provided an ideal carrier with abundant active sites for in-situ depositing and stabilizing of Ag3PO4 NPs, formed the Ag3PO4/Ni-Ti LDH/GO hybrid possessed an acceptable catalytic performance on the degradation of azo dyes, which could be applied in the efficient treatment of wastewater from industries.