JOURNAL OF COSMETIC SCIENCE 158 (6) M. Senzui, T. Tamura, K. Miura, Y. I k arashi, Y. Watanabe, and M. Fujii, Study on penetration of titanium dioxide (TiO(2)) nanoparticles into intact and damaged skin in vitro, J. Toxicol. Sci., 35, 107–113 (2010). (7) J. Wu, W. Liu, C. Xue, S. Zhou, F. L a n, L. Bi, H. Xu, X. Yang, and F. D. Zeng, Toxicity and penetration of TiO2 nanoparticles in hairless mice and porcine skin after subchronic dermal exposure, Toxicol. Lett., 191, 1–8 (2009). (8) F.-F. Cheng, T.-T. He, H.-T. Miao, J . -J. Shi, L.-P. Jiang, and J.-J. Zhu, Electron transfer mediated elec- trochemical biosensor for microRNAs detection based on metal ion functionalized titanium phosphate nanospheres at attomole level, ACS Appl. Mater. Interfaces., 7, 2979–2985 (2015). (9) M. Yada, Y. Inoue, A. Sakamoto, T. T o rikai, and T. Watari, Synthesis and controllable wettability of micro- and nanostructured titanium phosphate thin fi lms formed on titanium plates, ACS Appl. Mater. Interfaces, 6, 7695–7704 (2014). (10) G. Alberti, P. Cardini-Galli, U. Co s tantino, and E. Torracca, Crystalline insoluble salts of polybasic metals-I ion-exchange properties of crystalline titanium phosphate, J. Inorg. Nucl. Chem., 29, 571–578 (1967). (11) A. Bhaumik and S. Inagaki, Mesoporo u s titanium phosphate molecular sieves with ion-exchange capac- ity, J. Am. Chem. Soc., 123, 691–696 (2001). (12) H. Onoda, S. Fujikado, and T. Toyam a , Preparation of titanium phosphate white pigments with tita- nium sulfate and their powder properties, J. Adv. Ceram., 3, 132–136 (2014). (13) A. Bortun, E. Jaimez, R. Llavona, J . García, and J. Rodríguez, Formation of crystalline titanium(IV) phosphates from titanium(III) solutions, Mater. Res. Bull., 30, 413–420 (1995). (14) M. Maslova, D. Rusanova, V. Naydenov, O. Antzutkin, and L. G. Gerasimova, Formation of titanium phosphate composites during phosphoric acid decomposition of natural sphene, J. Solid State Chem., 181, 3357–3365 (2008). (15) K. K. Sahu, T. C. Alex, D. Mishra, an d A. Agrawal, An overview on the production of pigment grade titania from titania-rich slag, Waste Manag. Res., 24, 74–79 (2006). (16) S. Zhang and M. J. Nicol, An electroc h emical study of the reduction and dissolution of ilmenite in sulfuric acid solutions, Hydrometallurgy, 97, 146–152 (2009). (17) L. Palliyaguru, N. D. H. Arachchi, C. D. Jayaweera, and P. M. Jayaweera, Production of synthetic rutile from ilmenite via anion-exchange, Miner. Procss. Extr. Metall., 127, 169–175 (2017). (18) H. He, R. Cai, Y. Wang, G. Tao, P. Guo, H. Zuo, L. Chen, X. Liu, P. Zhao, and Q. Xia, Preparation and characterization of silk sericin/PVA blend fi lm with silver nanoparticles for potential antimicrobial ap- plication, Int. J. Biol. Macromol., 104, 457–464 (2017). (19) A. Lateef, R. Nazir, N. Jamil, S. Alam, R. Shah, M. N. Khan, and M. Saleeme, Synthesis and character- ization of zeolite based nano-composite: anenvironment friendly slow release fertilizer, Microporous Mes- oporous Mater., 232, 174–183 (2016). (20) G. Dransfi eld, P. J. Guest, P. L. Lyth, D. J. McGarvey, and T. G. Truscott, Photoactivity tests of TiO2-based inorganic sunscreens. Part 1: non-aqueous dispersions, J. Photochem. Photobiol. B Biol., 59, 147–151 (2000). (21) N. D. H. Arachchi, G. S. Peiris, M. Shimomura, and P. M. Jayaweera, Decomposition of ilmenite by ZnO/ZnS: enhanced leaching in acid solutions, Hydrometallurgy, 166, 73–79 (2016). (22) X. Wang, X. Yang, J. Cai, T. Miao, L. Li, G. Li, D. Deng, L. Jiang, and C. Wang, Novel fl ower-like titanium phosphate microstructures and their application in lead ion removal from drinking water, J. Mater. Chem. A, 2, 6718–6722 (2014). (23) H. B. Ortíz-Oliveros, R. M. Flores-Espinosa, E. Ordoñez-Regil, and S. M. Fernández-Valverde, Synthe- sis of α-Ti(HPO4)2·H2O and sorption of Eu(III), Chem. Eng. J., 236, 398–405 (2014). (24) Y. N. Wang and J. J. Bian, Effects of P2O5/TiO2 ratio on the sintering behavior and microwave dielec- tric properties of TiP2O7, Ceram. Int., 41, 4683–4687 (2015). (25) H. Onoda and T. Yamaguchi, Infl uence of ultrasonic treatment on preparation and powder properties of titanium phosphates, J. Mater. Chem., 22, 19826–19830 (2012). (26) D. Filippou and G. Hudon, Iron removal and recovery in the titanium dioxide feedstock and pigment industries, JOM, 61, 36 (2009). (27) T. Zhang, Y. Lu, and G. Luo, Effects of temperature and phosphoric acid addition on the solubility of iron phosphate dihydrate in aqueous solutions, Chin. J. Chem. Eng., 25, 211–215 (2017). (28) A . Stoch, W. Jastrzębski, A. Brożek, J. Stoch, J. Szaraniec, B. Trybalska, and G. Kmitaa, FTIR absorp- tion–refl ection study of biomimetic growth of phosphates on titanium implants, J. Mol. Struct., 555, 375–382 (2000). (29) T. S . Sysoeva, E. A. Asabina, V. I. Pet’kov, and V. S. Kurazhkovskaya, Alkali (alkaline-earth) metal, aluminum, and titanium complex orthophosphates: synthesis and characterization, Russ. J. Inorg. Chem., 54, 829–839 (2009).

FACILE SYNTHESIS OF TITANIUM PHOSPHATES 159 (30) S. R . Pinnell, D. Fairhurst, R. Gillies, M. A. Mitchnick, and N. Kollias, Microfi ne zinc oxide is a supe- rior sunscreen ingredient to microfi ne titanium dioxide, Dermatol. Surg., 26, 309–314 (2000). (31) T. D obbelaere, F. Mattelaer, J. Dendooven, P. M. Vereecken, and C. Detavernier, Plasma-enhanced atomic layer deposition of iron and titanium phosphates as electrode materials for 3D-structured lithium- ion microbatteries, ECS Trans., 75, 35–44 (2016). (32) T. O hno, K. Sarukawa, K. Tokieda, and M. Matsumura, Morphology of a TiO2 photocatalyst (Degussa, P-25) consisting of anatase and rutile crystalline phases, J. Catal., 203, 82–86 (2001). (33) A. R . Khataee and M. B. Kasiri, Photocatalytic degradation of organic dyes in the presence of nanostruc- tured titanium dioxide: infl uence of the chemical structure of dyes, J. Mol. Catal. A Chem., 328, 8–26 (2010). (34) S. L akshmi, R. Renganathan, and S. Fujita, Study on TiO2-mediated photocatalytic degradation of methylene blue, J. Photochem. Photobiol. A., 88, 163–167 (1995). (35) J. N . Pitts, E. A. Schuck, and J. K. S. Wan, Photoreduction of 2,2-diphenyl-1-picrylhydrazyl (DPPH) in hydrocarbons, J. Am. Chem. Soc., 86, 296–297 (1964). (36) T. A . Egerton and J. A. Mattinson, Comparison of photooxidation and photoreduction reactions on TiO2 nanoparticles, J. Photochem. Photobiol. A., 186, 115–120 (2007). (37) S. P urnamawati, N. Indrastuti, R. Danarti, and T. Saefudin, The role of moisturizers in addressing various kinds of dermatitis: a review, Clin. Med. Res., 15, 75–87 (2017).