1. V Augugliaro, V Loddo, M Pagliaro, G Palmisano, and L Palmisano, “Clean by light Irradiation: Practical Applications of Supported TiO2” Royal Society of Chemistry Publishing (2010). 2. X Zhang, Z Bao, X Tao, H Sun, Wen Chen, and X Zhou, R. Soc. Chem. Adv. 4 (2014) 64001. 3. H Huang, Y Xie, Z Zhang, F Zhang, Q Xu, and Z Wu, Applied Surface Science 293 (2014) 248. 4. H Wang, P Qin, G Yi, X Zu, L Zhang, W Hong, and X Chen, Materials Chemistry and Physics 194 (2017) 42. 5. D Chen, L Wei, L Meng, D Wang, Y Chen, Y Tian, S Yan, L Mei, and J Jiao, Nanoscale Research Letters 13 (2018) 92. 6. C G Granqvist, “Handbook of Inorganic Electrochromic Materials”, Elsevier Science (1995). 7. S Perkowitz, “Optical Characterization of Semiconductors: Infrared, Raman, and Photoluminescence Spectroscopy”, Academic Press (1993). 8. M A Green, “Solar Cells: Operating Principles, Technology and System Applications”, Prentice-Hall (1982). 9. A B Murphy, Solar Energy Materials & Solar Cells 91, 14 (2007) 1326. 10. R Lopez and R Gomez, J Sol-Gel Sci. Technol. 61 (2012) 1. 11. R Kumari, A Sahai, and N Goswami, Progress in Natural Science: Materials International 25 (2015) 300. 12. A Sanez-Trevizo, P Amezaga-Madrid, P Piza-Ruiz, W Antunez-Flores, and M Miki-Youshida, Materials Research 19 (2016) 33. 13. P Kubelka and F Munk, Zeitschrift für Technische Physik 12 (1931) 593. 14. J I Pankove, “Optical Processes in Semiconfuctors” Dover Publications, New Jersey (2010). 15. A E Morales, E Sanchez Mora, and U Pal, Revista Mexicana De F'Isica S 53, 5 (2007) 18. 16. H Ali, N Ismail, M Mekewi, and A C Hengazy, J. Solid State Electrochem 19 (2015) 3019. 17. A Sahai, Y Kumar, V Agarwal, S F Olive-Mendez, and N Goswami, Journal of Applied Physics 116 (2014) 164315. 18. L Sang, M Liao, and M Sumiya, Sensors 13 (2013) 10482. 19. A Welte, C Waldauf, C Brabec, and P Wellmann, Thin Solid Films 516 (2008) 7256. 20. C Chen, M Ye, M Lv, C Gong, W Guo, and C Lin, Electrochimica Acta 121 (2014) 175. 21. J Nowotny, “Oxide Semiconductor for Solar Energy Conversion Titaniume Dioxide”, CRC Press (2012). 22. S A Sherif, D Yogi Goswami, E K Stefanakos, and A Steinfeld (Eds), “Handbook of Hydrogen Energy”, CRC Press (2014). 23. N Nasiri, D Jin, and A Tricoli, Adv. Optical Mater. 7 (2019) 1800580. 24. Z Wang, H Wang, B Liu, W Qui, J Zhang, S Ran, H Huang, J Xu, H Han, D Chen, and G Shen, American Chemical Society, Nano 5, 10 (2011) 8412. 25. T Y Tsai, S J Chang, W Y Weng, C L Hsu, S H Wang, C J Chiu, T J Hsueh, and S P Chang, Journal of Electrochemical Society 159, 4 (2012) J132. 26. O Guller, E Peksu, and H Karaagac, Phys. Status Solidi A 215 (2018) 1700404. 27. D Chen, L Wei, L Meng, D Wang, Y Chen, Y Tian, S Yan, L Mei, and J Jiao, Journal of Alloys and Compounds 751 (2018) 56. 28. P Deb and J Chandra Dhar, Institute of Electrical and Electronics Photonics Technology Letters 31, 8 (2019) 571. 29. H Huang, L Pan, C K Lim, H Gong, J Guo, M S Tse, and O K Tan, Small 9, 18 (2013) 3153. 30. J Wu, S Lo, K Song, B K Vijayan, W Li, K A Gray, and V P Dravid, J. Mater. Res. 26 (2011) 1646. 31. N Daude, C Gout, and C Jouanin, Physical Review B 15 (1977) 3229. 32. N D Abazovic, M I Comor, M D Dramicanin, D J Jovanovic, S P Ahrenkiel, and J M Nedeljkovic, J. Phys. Chem. B 110 (2006) 25366. 33. Z Y Banyamin, P J Kelly, G West, and J Boardman, Coatings 4 (2014) 732. 34. S Abdullah, A U Moreh, B Hamza, U Sadiya, Z Abdullahi, M A Wara, H Kamaluddeen, M A Kebbe, and U F Monsurat, International Journal of Innovation and Applied Studies 9, 2 (2014) 947. 35. Z Yang, M Wang, X Song, G Yan, Y Ding, and J Bai, J. Mater. Chem. C 2 (2014) 4312. 36. D Caliskan, B Butun, and E Ozbay, J. Vac. Sci. Technol. B 31, 2 (2013) 020606. 37. A M Selman and Z Hassan, Materials Research Bulletin 73 (2016) 29