Preparation of Transparent ZIF-8/TiO2 Nanocomposite Thin Films for Photocatalytic Applications

Transparent ZIF-8/TiO2 nanocomposite thin films were prepared by a two-stage dip-coating method. TiO2 was first deposited on glass substrates by sol-gel dip-coating. Heat treatment temperature, number of layers and doping metal type/level were optimized in the first step. In the next step, ZIF-8 was grown by solvent based crystallization method on TiO2 layers. Cu, Ce, Fe or Zn doped TiO2 thin films were prepared in order to increase the photocatalytic performance of ZIF-8/TiO2 nanocomposite. The highest photocatalytic methylene blue degradation activities were obtained with the ZIF-8/TiO2 nanocomposite thin films prepared by using 1% Cu or 1% Ce doped TiO2 thin films as the substrates. Both films exhibited 19% dye removal in 1 hour under 254 nm LED light irradiation whereas the dye removal efficiencies were 36% and 29%, respectively, in 1 hour under 365 nm LED light irradiation.

Keywords:

Photocatalysis, ZIF-8, TiO2 Nanocomposite, Thin film,

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[1] B. L. Loeb, "Water-Energy-Food Nexus," Ozone: Science & Engineering, vol. 38, no. 3, pp. 173-174, 2016, doi: 10.1080/01919512.2016.1166029.
[2] H. Dai et al., "Recent advances on ZIF-8 composites for adsorption and photocatalytic wastewater pollutant removal: Fabrication, applications and perspective," Coordination Chemistry Reviews, vol. 441, p. 213985, 2021, doi: 10.1016/j.ccr.2021.213985.
[3] K. S. Park et al., "Exceptional chemical and thermal stability of zeolitic imidazolate frameworks," PNAS, vol. 103, no. 27, pp. 10186-10191, Jul 5 2006, doi: 10.1073/pnas.0602439103.
[4] H.-P. Jing, C.-C. Wang, Y.-W. Zhang, P. Wang, and R. Li, "Photocatalytic degradation of methylene blue in ZIF-8," RSC Advances, vol. 4, no. 97, pp. 54454-54462, 2014, doi: 10.1039/c4ra08820d.
[5] A. Chakraborty, D. A. Islam, and H. Acharya, "Facile synthesis of CuO nanoparticles deposited zeolitic imidazolate frameworks (ZIF-8) for efficient photocatalytic dye degradation," Journal of Solid State Chemistry, vol. 269, pp. 566-574, 2019, doi: 10.1016/j.jssc.2018.10.036.
[6] A. Liu et al., "Construction of CuInS2@ZIF-8 nanocomposites with enhanced photocatalytic activity and durability," Materials Research Bulletin, vol. 112, pp. 147-153, 2019, doi: 10.1016/j.materresbull.2018.12.020.
[7] N. M. Mahmoodi, S. Keshavarzi, M. Oveisi, S. Rahimi, and B. Hayati, "Metal-organic framework (ZIF-8)/inorganic nanofiber (Fe2O3) nanocomposite: Green synthesis and photocatalytic degradation using LED irradiation," Journal of Molecular Liquids, vol. 291, p. 111333, 2019, doi: 10.1016/j.molliq.2019.111333.
[8] Y. Liu et al., "Photostable core-shell CdS/ZIF-8 composite for enhanced photocatalytic reduction of CO2," Applied Surface Science, vol. 498, p. 143899, 2019, doi: 10.1016/j.apsusc.2019.143899.
[9] J. Qiu et al., "Constructing Cd0.5Zn0.5S@ZIF-8 nanocomposites through self-assembly strategy to enhance Cr(VI) photocatalytic reduction," Journal of Hazardous Materials, vol. 349, pp. 234-241, May 5 2018, doi: 10.1016/j.jhazmat.2018.02.009.
[10] X. Wei, Y. Wang, Y. Huang, and C. Fan, "Composite ZIF-8 with CQDs for boosting visible-light-driven photocatalytic removal of NO," Journal of Alloys and Compounds, vol. 802, pp. 467-476, 2019, doi: 10.1016/j.jallcom.2019.06.086.
[11] J. Liu et al., "Photocatalytic conversion of nitrogen to ammonia with water on triphase interfaces of hydrophilic-hydrophobic composite Bi4O5Br2/ZIF-8," Chemical Engineering Journal, vol. 371, pp. 796-803, 2019, doi: 10.1016/j.cej.2019.03.283.
[12] H.-T. Wang et al., "Design and synthesis of porous C–ZnO/TiO2@ZIF-8 multi-component nano-system via pyrolysis strategy with high adsorption capacity and visible light photocatalytic activity," Microporous and Mesoporous Materials, vol. 288, p. 109548, 2019, doi: 10.1016/j.micromeso.2019.06.010.
[13] Z. Li et al., "Preparation of flexible PAN–C3N4–ZIF-8 photocatalytic nanofibers and visible light catalytic properties," Optical Materials, vol. 132, p. 112762, 2022, doi: 10.1016/j.optmat.2022.112762.
[14] T. Qiang, S. Wang, L. Ren, and X. Gao, "Novel 3D Cu2O/N-CQD/ZIF-8 composite photocatalyst with Z-scheme heterojunction for the efficient photocatalytic reduction of Cr(Ⅵ)," Journal of Environmental Chemical Engineering, vol. 10, no. 6, p. 108784, 2022, doi: 10.1016/j.jece.2022.108784.
[15] D. Sajwan, A. Semwal, J. Rawat, H. Sharma, and C. Dwivedi, "Synthesis of CdSe QDs decorated ZIF-8 composite for visible light assisted degradation of methylene blue," Materials Today: Proceedings, 2022, doi: 10.1016/j.matpr.2022.10.008.
[16] J. Wu, Y. Jin, D. Wu, X. Yan, N. Ma, and W. Dai, "Well-construction of Zn2SnO4/SnO2@ZIF-8 core–shell hetero-structure with efficient photocatalytic activity towards tetracycline under restricted space," Chinese Journal of Chemical Engineering, vol. 52, pp. 45-55, 2022, doi: 10.1016/j.cjche.2022.04.016.
[17] H. A. Yurtsever, M. Y. Akgunlu, T. Kurt, A. S. Yurttaş, and B. Topuz, "Photocatalytic activities of Ag+ doped ZIF-8 and ZIF-L crystals," Journal of the Turkish Chemical Society, Section A: Chemistry, vol. 3, no. 3, 2016, doi: 10.18596/jotcsa.10970.
[18] G. Fan, J. Luo, L. Guo, R. Lin, X. Zheng, and S. A. Snyder, "Doping Ag/AgCl in zeolitic imidazolate framework-8 (ZIF-8) to enhance the performance of photodegradation of methylene blue," Chemosphere, vol. 209, pp. 44-52, Oct 2018, doi: 10.1016/j.chemosphere.2018.06.036.
[19] H. A. Yurtsever and A. E. Çetin, "Fabrication of ZIF-8 decorated copper doped TiO2 nanocomposite at low ZIF-8 loading for solar energy applications," Colloids and Surfaces A: Physicochemical and Engineering Aspects, vol. 625, p. 126980, 2021, doi: 10.1016/j.colsurfa.2021.126980.
[20] N. Madkhali et al., "Recent update on photocatalytic degradation of pollutants in waste water using TiO2-based heterostructured materials," Results in Engineering, vol. 17, p. 100920, 2023, doi: 10.1016/j.rineng.2023.100920.
[21] R. Chandra, S. Mukhopadhyay, and M. Nath, "TiO2@ZIF-8: A novel approach of modifying micro-environment for enhanced photo-catalytic dye degradation and high usability of TiO2 nanoparticles," Materials Letters, vol. 164, pp. 571-574, 2016, doi: 10.1016/j.matlet.2015.11.018.
[22] E. Pipelzadeh, V. Rudolph, G. Hanson, C. Noble, and L. Wang, "Photoreduction of CO2 on ZIF-8/TiO2 nanocomposites in a gaseous photoreactor under pressure swing," Applied Catalysis B: Environmental, vol. 218, pp. 672-678, 2017, doi: 10.1016/j.apcatb.2017.06.054.
[23] R. Li, W. Li, C. Jin, Q. He, and Y. Wang, "Fabrication of ZIF-8@TiO2 micron composite via hydrothermal method with enhanced absorption and photocatalytic activities in tetracycline degradation," Journal of Alloys and Compounds, vol. 825, p. 154008, 2020, doi: 10.1016/j.jallcom.2020.154008.
[24] X. Qi, F. Shang, T. Wang, Y. Ma, and Y. Yan, "In situ coupling of TiO2(B) and ZIF-8 with enhanced photocatalytic activity via effective defect," CrystEngComm, vol. 22, no. 25, pp. 4250-4259, 2020, doi: 10.1039/d0ce00595a.
[25] W.-L. Zhong, C. Li, X.-M. Liu, X.-K. Bai, G.-S. Zhang, and C.-X. Lei, "Liquid phase deposition of flower-like TiO2 microspheres decorated by ZIF-8 nanoparticles with enhanced photocatalytic activity," Microporous and Mesoporous Materials, vol. 306, p. 110401, 2020, doi: 10.1016/j.micromeso.2020.110401.
[26] C. Hou, Q. Xu, J. Peng, Z. Ji, and X. Hu, "(110)-oriented ZIF-8 thin films on ITO with controllable thickness," Chemphyschem, vol. 14, no. 1, pp. 140-144, Jan 14 2013, doi: 10.1002/cphc.201200677.
[27] G. Genesio, J. Maynadié, M. Carboni, and D. Meyer, "Recent status on MOF thin films on transparent conductive oxides substrates (ITO or FTO)," New Journal of Chemistry, vol. 42, no. 4, pp. 2351-2363, 2018, doi: 10.1039/c7nj03171h.
[28] K. Kida, K. Fujita, T. Shimada, S. Tanaka, and Y. Miyake, "Layer-by-layer aqueous rapid synthesis of ZIF-8 films on a reactive surface," Dalton Transactions, vol. 42, no. 31, pp. 11128-11135, Aug 21 2013, doi: 10.1039/c3dt51135a.
[29] O. Shekhah and M. Eddaoudi, "The liquid phase epitaxy method for the construction of oriented ZIF-8 thin films with controlled growth on functionalized surfaces," Chemical Communications, vol. 49, no. 86, pp. 10079-10081, Oct 3 2013, doi: 10.1039/c3cc45343j.
[30] J. A. Allegretto, J. Dostalek, M. Rafti, B. Menges, O. Azzaroni, and W. Knoll, "Shedding Light on the Dark Corners of Metal-Organic Framework Thin Films: Growth and Structural Stability of ZIF-8 Layers Probed by Optical Waveguide Spectroscopy," The Journal of Physical Chemistry A, vol. 123, no. 5, pp. 1100-1109, Feb 7 2019, doi: 10.1021/acs.jpca.8b09610.
[31] R. L. Papporello, E. E. Miró, and J. M. Zamaro, "Secondary growth of ZIF-8 films onto copper-based foils. Insight into surface interactions," Microporous and Mesoporous Materials, vol. 211, pp. 64-72, 2015, doi: 10.1016/j.micromeso.2015.02.049.
[32] O. L. Rose et al., "Thin Films of Metal-Organic Framework Interfaces Obtained by Laser Evaporation," Nanomaterials, vol. 11, no. 6, May 21 2021, doi: 10.3390/nano11061367.