TY - JOUR ID - 41098 TI - Photocatalytic Degradation of Anionic Azo Dyes Acid Orange 7 and Acid Red 88 in Aqueous Solutions Using TiO2-containing Hydrogel JO - Analytical and Bioanalytical Chemistry Research JA - ABCR LA - en SN - AU - Bahram, Morteza AU - Salami, Saed AU - Moghtader, Mehdi AU - Najafi Moghadam, Peyman AU - Reza Fareghi, Amir AU - Rasoli, Masoumeh AU - Salimpoor, Samaneh AD - Department of Chemistry, Faculty of Science, Urmia University, Urmia, Iran AD - Department of Science, Payame Noor University, Urmia Branch, Urmia, Iran Y1 - 2017 PY - 2017 VL - 4 IS - 1 SP - 53 EP - 63 KW - Photocatalytic degradation KW - Hydrogel KW - TiO2 KW - Azo dye KW - Acid Red 88 KW - Acid Orange 7 DO - 10.22036/abcr.2017.41098 N2 -       The photocatalytic degradation of two anionic azo dyes Acid Red88 (AR 88) and Acid Orange 7 (AO7) was investigated in aqueous solution using a TiO2-containing hydrogel and UV light. The pH-sensitive hydrogel poly (styrene-alt-maleic anhydride) (PSMA), was synthesized and crosslinked in the presence of melamine and TiO2 nanoparticles which results in entrapment of TiO‌2 into the melamine-grafted PSMA (M-g-PSMA) hydrogel. Potential application of this nanocomposite for removal of azo dyes from wastewater was studied and the effective parameters on degradation process including time, initial pH value of the solutions, temperature and amount of added nanocomposite were optimized. The optimized values for effective parameters are as follows: time: 30 min, initial pH of the solutions: 5.23 for AO7 and 5.3 for AR88, temperature: 24 ºC and amount of added nanocomposite: 250 mg. Results showed that in optimum experimental conditions the removal percentages are about %94 for AR88 and %71 for AO7 indicating good removal performance toward the method whilst pH-sensitivity of the nanocomposite facilitates retrieval of nanocatalyst at the end of the reaction. UR - https://www.analchemres.org/article_41098.html L1 - https://www.analchemres.org/article_41098_254fa8b88fe3151eef0e770efe24f8e9.pdf ER -