Novel N,C,S-TiO2/WO3/rGO Z-scheme heterojunction with enhanced visible-light driven photocatalytic performance

被引:32
作者
Vu, Thi-Phuong-Thao [1 ]
Tran, Dinh-Trinh [1 ]
Dang, Viet-Cuong [1 ]
机构
[1] Vietnam Natl Univ, Univ Sci, VNU Key Lab Adv Mat Green Growth, 19 Thanh Tong St, Hanoi 120000, Vietnam
关键词
N; C; S tri-doped TiO2; rGO; WO3; Z-scheme photocatalyst; Visible light; Dyes; Kinetics; mechanism; DOPED TIO2; AQUEOUS-SOLUTION; AZO DYES; DEGRADATION; WO3; EFFICIENT; CATALYST; NANORODS; OXIDE; WATER;
D O I
10.1016/j.jcis.2021.12.050
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
Novel N,C,S-TiO2/WO3/rGO Z scheme photocatalyst was successfully synthesized from graphite, TIOT, and ammonium metatungstate precursors. Material characteristics such as crystal structure, surface morphology, functional groups, specific surface area, elemental composition, band gap energy, and electron-hole recombination were characterized by XRD, TEM, BET, SEM/EDX, FT-IR, UV-VIS, and PL methods. The as-synthesized novel N,C,S-TiO2/WO3/rGO Z-scheme heterojunction photocatalyst exhibited visible light-driven photocatalytic activity (the band gap energy = 2.24 eV), could generate both effective electrons and holes, and presented the lowest electron-hole recombination rate compared to all individual components. Different factors impacting the photocatalytic decomposition of Direct Blue 71 (DB 71) by the N,C,S-TiO2/WO3/rGO system were studied. The results showed that pH of the solution, catalyst load, DB 71 initial concentration, and reaction time affected the DB 71 photocatalytic degradation efficiency. The DB 71 degradation completed after 100 min with a typical efficiency of over 91%, which was much better than other photocatalytic systems. The DB 71 degradation process followed the pseudo-first-order kinetics model with coefficients of determination > 0.95 for all conditions. The photocatalyst was easily regenerated, and exhibited a very good stability, with a photocatalytic degradation efficiency of over 83.0% after 3 cycles. (C) 2021 Elsevier Inc. All rights reserved.
引用
收藏
页码:49 / 60
页数:12
相关论文
共 59 条
  • [1] W and Mo doped TiO2: Synthesis, characterization and photocatalytic activity
    Aviles-Garcia, Osmin
    Espino-Valencia, Jaime
    Romero, Rubi
    Luis Rico-Cerda, Jose
    Arroyo-Albiter, Manuel
    Natividad, Reyna
    [J]. FUEL, 2017, 198 : 31 - 41
  • [2] Carboxyl-directed hydrothermal synthesis of WO3 nanostructures and their morphology-dependent gas-sensing properties
    Bai, Shouli
    Zhang, Kewei
    Shu, Xin
    Chen, Song
    Luo, Ruixian
    Li, Dianqing
    Chen, Aifan
    [J]. CRYSTENGCOMM, 2014, 16 (44): : 10210 - 10217
  • [3] Fast kinetic spectroscopy, decoloration and production of H2O2 induced by visible light in oxygenated solutions of the azo dye Orange II
    Bandara, J
    Kiwi, J
    [J]. NEW JOURNAL OF CHEMISTRY, 1999, 23 (07) : 717 - 724
  • [4] Analyses of carcinogenic aromatic amines released from harmful azo colorants by Streptomyces SPSS07
    Bhaskar, M
    Gnanamani, A
    Ganeshjeevan, RJ
    Chandrasekar, R
    Sadulla, S
    Radhakrishnan, G
    [J]. JOURNAL OF CHROMATOGRAPHY A, 2003, 1018 (01) : 117 - 123
  • [5] Visible light assisted decolorization of azo dyes: Direct Red 16 and Direct Blue 71 in aqueous solution on the p-CuFeO2/n-ZnO system
    Boumaza, Salim
    Kaouah, Farida
    Hamane, Djamila
    Trari, Mohamed
    Omeiri, Said
    Bendjama, Zoubida
    [J]. JOURNAL OF MOLECULAR CATALYSIS A-CHEMICAL, 2014, 393 : 156 - 165
  • [6] Surface electronic properties of polycrystalline WO3 thin films:: a study by core level and valence band photoemission
    Bussolotti, F
    Lozzi, L
    Passacantando, M
    La Rosa, S
    Santucci, S
    Ottaviano, L
    [J]. SURFACE SCIENCE, 2003, 538 (1-2) : 113 - 123
  • [7] CRITICAL-REVIEW OF RATE CONSTANTS FOR REACTIONS OF HYDRATED ELECTRONS, HYDROGEN-ATOMS AND HYDROXYL RADICALS (.OH/.O-) IN AQUEOUS-SOLUTION
    BUXTON, GV
    GREENSTOCK, CL
    HELMAN, WP
    ROSS, AB
    [J]. JOURNAL OF PHYSICAL AND CHEMICAL REFERENCE DATA, 1988, 17 (02) : 513 - 886
  • [8] Synthesis and characterization of C-N-S-tridoped TiO2 nano-crystalline photocatalyst and its photocatalytic activity for degradation of rhodamine B
    Cheng, Xiuwen
    Yu, Xiujuan
    Xing, Zipeng
    [J]. JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS, 2013, 74 (05) : 684 - 690
  • [9] Photocatalytic degradation of azo dye acid red 14 in water: investigation of the effect of operational parameters
    Daneshvar, N
    Salari, D
    Khataee, AR
    [J]. JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY, 2003, 157 (01) : 111 - 116
  • [10] A novel method of synthesis of small band gap SnS nanorods and its efficient photocatalytic dye degradation
    Das, Dipika
    Dutta, Raj Kumar
    [J]. JOURNAL OF COLLOID AND INTERFACE SCIENCE, 2015, 457 : 339 - 344