Facile preparation of g-C3N4/Bi2WO6 hybrid photocatalyst with enhanced visible light photoreduction of Cr(VI)
Source abstract
Abstract
A series of binary g-C3N4/Bi2WO6 hybrid photocatalysts with different ratios of g-C3N4 were successfully prepared using a facile hydrothermal method. The composition, structure, and optical properties of the obtained g-C3N4/Bi2WO6 composite photocatalysts were characterized by various analytical techniques including infrared spectroscopy, X-ray diffraction, UV-vis diffuse reflectance spectroscopy, N2 adsorption-desorption measurements, X-ray photoelectron spectroscopy, and scanning electron microscopy. The photocatalytic activity of the as-prepared samples were evaluated in the reduction of toxic Cr(VI) to Cr(III) under visible light irradiation. Among all the tested catalysts, 1:15-g-C3N4/Bi2WO6 nanocomposite displays the highest photocatalytic activity with the optimal rate constant of 0.0414 min−1 due to the high surface area and the improvement of visible light absorbing capacity. The composite also shows good photostability and reusability after five cyclic experiments. Different scavengers such as citric acid, oxalic acid, and isopropanol were used to systematically investigate their effect on Cr(VI) photoreduction. Appropriate concentrations of citric acid and oxalic acid have positive effect to improve the photocatalytic activity by consuming photo-induced electrons to minimize the rate of electron-hole recombination, but excessive citric acid and oxalic acid are harmful to the photoreduction. A possible mechanism for Cr(VI) photoreduction by g-C3N4/Bi2WO6 composite was proposed.
Source: openaire · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Advanced Photocatalysis Techniques
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References (46)
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1. Cao SW, Low JX, Yu JG, Jaroniec M (2015) Polymeric photocatalysts based on graphitic carbon nitride. Adv Mater 27:2150–217610.1002/adma.201500033 ↗
2. Challagulla S, Nagarjuna R, Ganesan R, Roy S (2016) Acrylate-based polymerizable sol-gel synthesis of magnetically recoverable TiO2 supported Fe3O4 for Cr(VI) photoreduction in aerobic atmosphere. ACS Sustain Chem Eng 4:974–98210.1021/acssuschemeng.5b01055 ↗
3. Chen XF, Wei J, Hou RJ, Liang Y, Xie ZL, Zhu YG, Zhang XW, Wang HT (2016) Growth of g-C3N4 on mesoporous TiO2 spheres with high photocatalytic activity under visible light irradiation. Appl Catal B-Environ 188:342–35010.1016/j.apcatb.2016.02.012 ↗
4. Choi Y, Koo MS, Bokare AD, Kim DH, Bahnemann DW, Choi W (2017) Sequential process combination of photocatalytic oxidation and dark reduction for the removal of organic pollutants and Cr(VI) using Ag/TiO2. Environ Sci Technol 51:3973–398110.1021/acs.est.6b06303 ↗
5. Colon G, Hidalgo MC, Navio JA (2001) Photocatalytic deactivation of commercial TiO2 samples during simultaneous photoreduction of Cr(VI) and photooxidation of salicylic acid. J Photoch Photobio A 138:79–8510.1016/S1010-6030(00)00372-5 ↗
6. Das D, Shinde SL, Nanda KK (2016) Temperature-dependent photoluminescence of g-C3N4: implication for temperature sensing. Acs Appl Mater Interf 8:2181–218610.1021/acsami.5b10770 ↗
7. Deng YC, Tang L, Zeng GM, Zhu ZJ, Yan M, Zhou YY, Wang JJ, Liu YN, Wang JJ (2017) Insight into highly efficient simultaneous photocatalytic removal of Cr(VI) and 2,4-diclorophenol under visible light irradiation by phosphorus doped porous ultrathin g-C3N4 nanosheets from aqueous media: performance and reaction mechanism. Appl Catal B-Environ 203:343–35410.1016/j.apcatb.2016.10.046 ↗
8. Di J, Xia JX, Ge YP, Li HP, Ji HY, Xu H, Zhang Q, Li HM, Li MN (2015) Novel visible-light-driven CQDs/Bi2WO6 hybrid materials with enhanced photocatalytic activity toward organic pollutants degradation and mechanism insight. Appl Catal B-Environ 168:51–6110.1016/j.apcatb.2014.11.057 ↗
9. Gao Y, Chen CL, Tan XL, Xu H, Zhu KR (2016) Polyaniline-modified 3D-flower-like molybdenum disulfide composite for efficient adsorption/photocatalytic reduction of Cr(VI). J Colloid Interf Sci 476:62–7010.1016/j.jcis.2016.05.022 ↗
10. Hu ZF, Shen ZR, Yu JC (2017) Converting carbohydrates to carbon-based photocatalysts for environmental treatment. Environ Sci Technol 51:7076–708310.1021/acs.est.7b00118 ↗
11. Jourshabani M, Shariatinia Z, Badiei A (2017) Facile one-pot synthesis of cerium oxide/sulfur-doped graphitic carbon nitride (g-C3N4) as efficient nanophotocatalysts under visible light irradiation. J Colloid Interf Sci 507:59–7310.1016/j.jcis.2017.07.106 ↗
12. Jun P, Wang Y, Sun Y, Zhang D (2016) Controllable one-pot synthesis of nest-like Bi2WO6/BiVO4 composite with enhanced photocatalytic antifouling performance under visible light irradiation. Dalton Trans 45:4588–460210.1039/C6DT00118A ↗
13. Kumar SG, Rao K (2015) Tungsten-based nanomaterials (WO3 & Bi2WO6): modifications related to charge carrier transfer mechanisms and photocatalytic applications. Appl Surf Sci 355:939–95810.1016/j.apsusc.2015.07.003 ↗
14. Li YL, Bian YY, Qin HX, Zhang YX, Bian ZF (2017) Photocatalytic reduction behavior of hexavalent chromium on hydroxyl modified titanium dioxide. Appl Catal B-Environ 206:293–29910.1016/j.apcatb.2017.01.044 ↗
15. Lin B, Yang GD, Wang LZ (2019) Stacking-layer-number dependence of water adsorption in 3D ordered close-packed g-C3N4 nanosphere arrays for photocatalytic hydrogen evolution. Angew Chem Int Ed 58:4587–459110.1002/anie.201814360 ↗
16. Liu YF, Liu SS, Wu TT, Lin HM, Zhang X (2017) Facile preparation of flower-like Bi2WO6/CdS heterostructured photocatalyst with enhanced visible-light-driven photocatalytic activity for Cr(VI) reduction. J Sol-Gel Sci Technol 83:315–32310.1007/s10971-017-4416-x ↗
17. Long G, Ding J, Xie L, Sun R, Chen M, Zhou Y, Huang X, Han G, Li Y, Zhao W (2018) Fabrication of mediator-free g-C3N4/Bi2WO6 Z-scheme with enhanced photocatalytic reduction dechlorination performance of 2,4-DCP. Appl Surf Sci 455:1010–101810.1016/j.apsusc.2018.06.072 ↗
18. Ma HA, Jia XP, Chen LX, Zhu PW, Guo WL, Guo XB, Wang YD, Li SQ, Zou GT, Zhang G, Bex P (2002) High-pressure pyrolysis study of C3N6H6: a route to preparing bulk C3N4. J Phys-Condens Matter 14:11269–1127310.1088/0953-8984/14/44/466 ↗
19. Mamba G, Mishra AK (2016) Graphitic carbon nitride (g-C3N4) nanocomposites: a new and exciting generation of visible light driven photocatalysts for environmental pollution remediation. Appl Catal B-Environ 198:347–37710.1016/j.apcatb.2016.05.052 ↗
20. Mekatel H, Amokrane S, Bellal B, Trari M, Nibou D (2012) Photocatalytic reduction of Cr(VI) on nanosized Fe2O3 supported on natural Algerian clay: characteristics, kinetic and thermodynamic study. Chem Eng J 200:611–61810.1016/j.cej.2012.06.121 ↗
21. Nogueira AE, Lopes OF, Neto ABS, Ribeiro C (2017) Enhanced Cr(VI) photoreduction in aqueous solution using Nb2O5/CuO heterostructures under UV and visible irradiation. Chem Eng J 312:220–22710.1016/j.cej.2016.11.135 ↗
22. Ong WJ, Tan LL, Ng YH, Yong ST, Chai SP (2016) Graphitic carbon nitride (g-C3N4)-based photocatalysts for artificial photosynthesis and environmental remediation: are we a step closer to achieving sustainability? Chem Rev 116:7159–732910.1021/acs.chemrev.6b00075 ↗
23. Peng Y, Yan M, Chen QG, Fan CM, Zhou HY, Xu AW (2014) Novel onedimensional Bi2O3-Bi2WO6 p-n hierarchical heterojunction with enhanced photocatalytic activity. J Mater Chem A 2:8517–852410.1039/C4TA00274A ↗
24. Pradhan D, Sukla LB, Sawyer M, Rahman P (2017) Recent bioreduction of hexavalent chromium in wastewater treatment: a review. J Ind Eng Chem 55:1–2010.1016/j.jiec.2017.06.040 ↗
25. Qu JF, Chen DY, Li NJ, Xu QF, Li H, He JH, Lu JM (2017) Coral-inspired nanoscale design of porous SnS2 for photocatalytic reduction and removal of aqueous Cr (VI). Appl Catal B-Environ 207:404–41110.1016/j.apcatb.2017.02.050 ↗
26. Rauf A, Shah M, Choi GH, Humayoun UB, Yoon DH, Bae JW, Park J, Kim WJ, Yoo PJ (2015) Facile synthesis of hierarchically structured Bi2S3/Bi2WO6 photocatalysts for highly efficient reduction of Cr(VI). ACS Sustain Chem Eng 3:2847–285510.1021/acssuschemeng.5b00783 ↗
27. Rauf A, Shah M, Lee JY, Chung CH, Bae JW, Yoo PJ (2017) Non-stoichiometric SnS microspheres with highly enhanced photoreduction efficiency for Cr(VI) ions. RSC Adv 7:30533–3054110.1039/C7RA03854B ↗
28. Shaikh A, Mishra SP, Mohapatra P, Parida S (2017) One-step solvothermal synthesis of TiO2-reduced graphene oxide nanocomposites with enhanced visible light photoreduction of Cr(VI). J Nanopart Res 19:20610.1007/s11051-017-3894-7 ↗
29. Shirzad-Siboni M, Farrokhi M, Soltani RDC, Khataee A, Tajassosi S (2014) Photocatalytic reduction of hexavalent chromium over ZnO nanorods immobilized on Kaolin. Ind Eng Chem Res 53:1079–108710.1021/ie4032583 ↗
30. Sun H, Zhou XZ, Zhang HZ, Tu WX (2017) An efficient exfoliation method to obtain graphitic carbon nitride nanosheets with superior visible-light photocatalytic activity. Int J Hydrog Energ 42:7930–793710.1016/j.ijhydene.2016.12.080 ↗
31. Thatoi H, Das S, Mishra J, Rath BP, Das NN (2014) Bacterial chromate reductase, a potential enzyme for bioremediation of hexavalent chromium: a review. J Environ Manag 146:383–39910.1016/j.jenvman.2014.07.014 ↗
32. Vellaichamy B, Periakaruppan P, Nagulan B (2017) Reduction of Cr6+ from wastewater using a novel in situ-synthesized PANI/MnO2/TiO2 nanocomposite: renewable, selective, stable, and synergistic catalysis. ACS Sustain Chem Eng 5:9313–932410.1021/acssuschemeng.7b02324 ↗
33. Wang L, Ren ZJ (2014) Bioelectrochemical metal recovery from wastewater: a review. Water Res 66:219–23210.1016/j.watres.2014.08.013 ↗
34. Wang N, Xu YZ, Zhu LH, Shen XT, Tang HQ (2009) Reconsideration to the deactivation of TiO2 catalyst during simultaneous photocatalytic reduction of Cr(VI) and oxidation of salicylic acid. J Photoch Photobio A 201:121–12710.1016/j.jphotochem.2008.10.002 ↗
35. Wang H, Yuan XZ, Wu Y, Zeng GM, Chen XH, Leng LJ, Wu ZB, Jiang LB, Li H (2015) Facile synthesis of amino-functionalized titanium metal-organic frameworks and their superior visible-light photocatalytic activity for Cr(VI) reduction. J Hazard Mater 286:187–19410.1016/j.jhazmat.2014.11.039 ↗
36. Xia Q, Huang BB, Yuan XZ, Wang H, Wu ZB, Jiang LB, Xiong T, Zhang J, Zeng GM, Wang H (2018) Modified stannous sulfide nanoparticles with metal-organic framework: toward efficient and enhanced photocatalytic reduction of chromium (VI) under visible light. J Colloid Interface Sci 530:481–49210.1016/j.jcis.2018.05.015 ↗
37. Yan SC, Li ZS, Zou ZG (2009) Photodegradation performance of g-C3N4 fabricated by directly heating melamine. Langmuir 25:10397–1040110.1021/la900923z ↗
38. Yang LX, Xiao Y, Liu SH, Li Y, Cai QY, Luo SL, Zeng GM (2010) Photocatalytic reduction of Cr(VI) on WO3 doped long TiO2 nanotube arrays in the presence of citric acid. Appl Catal B-Environ 94:142–14910.1016/j.apcatb.2009.11.002 ↗
39. Ye MY, Zhao ZH, Hu ZF, Liu LQ, Ji HM, Shen ZR, Ma TY (2017) 0D/2D heterojunctions of vanadate quantum dots/graphitic carbon nitride nanosheets for enhanced visible-light-driven photocatalysis. Angew Chem Int Ed 56:8407–841110.1002/anie.201611127 ↗
40. Zhang Y, Park SJ (2019) Stabilization of dispersed CuPd bimetallic alloy nanoparticles on ZIF-8 for photoreduction of Cr(VI) in aqueous solution. Chem Eng J 369:353–36210.1016/j.cej.2019.03.083 ↗
41. Zhang YC, Li J, Xu HY (2012) One-step in situ solvothermal synthesis of SnS2/TiO2 nanocomposites with high performance in visible light-driven photocatalytic reduction of aqueous Cr(VI). Appl Catal B-Environ 123-124:18–2610.1016/j.apcatb.2012.04.018 ↗
42. Zhang N, Ciriminna R, Pagliaro M, Xu YJ (2014a) Nanochemistry-derived Bi2WO6 nanostructures: towards production of sustainable chemicals and fuels induced by visible light. Chem Soc Rev 43:5276–528710.1039/C4CS00056K ↗
43. Zhang YC, Yao L, Zhang GS, Dionysiou DD, Li J, Du XH (2014b) One-step hydrothermal synthesis of high-performance visible-light-driven SnS2/SnO2 nanoheterojunction photocatalyst for the reduction of aqueous Cr(VI). Appl Catal B-Environ 144:730–73810.1016/j.apcatb.2013.08.006 ↗
44. Zhang YX, Xu MJ, Li H, Ge H, Bian ZF (2018) The enhanced photoreduction of Cr(VI) to Cr(III) using carbon dots coupled TiO2 mesocrystals. Appl Catal B-Environ 226:213–21910.1016/j.apcatb.2017.12.053 ↗
45. Zhao J, Ji Z, Shen X, Zhou H, Ma L (2015a) Facile synthesis of WO3 nanorods/g-C3N4 composites with enhanced photocatalytic activity. Ceram Int 41:5600–560610.1016/j.ceramint.2014.12.140 ↗
46. Zhao ZW, Sun YJ, Dong F (2015b) Graphitic carbon nitride based nanocomposites: a review. Nanoscale 7:15–3710.1039/C4NR03008G ↗