02025nas a2200241   4500008004100000022001400041245016300055210006900218260000800287300001600295490000700311520115500318653001701473653001901490653001901509653002601528653001701554653001501571100002201586700002301608700002701631856012501658       2021                        eng d  a0944-134400aImproved photocatalytic efficiency of TiO2 by doping with tungsten and synthesizing in ionic liquid: precise kinetics-mechanism and effect of oxidizing agents0 aImproved photocatalytic efficiency of TiO2 by doping with tungst  cAPR  a17532-175450 v283 a<p>The degradation of nitroaromatics/toxic energetic compounds contaminated water is a major cause of concern. W-doped TiO2 nanoparticles (NPs) were synthesized in ionic liquid, ethyl methyl imidazolium dicyanamide (EMIM-DCA) by a solvothermal method. The developed NPs were sintered at 500 degrees C and characterized by UV-Vis-DRS, FT-IR, FE-SEM, XRD, XPS, and BET techniques. The 30-40-nm-sized NPs were subjected to photocatalytic degradation of the toxic energetic compound, tetryl (2,4,6-trinitrophenylmethylnitramine) under UV-Vis light. Various operating parameters such as the effect of concentration of catalyst, pH of feed phase, oxidizing agents, and recycling of catalyst were studied in detail. For the first time, the degradation-mechanism pathway and kinetics of tetryl were evaluated. The degradation products were precisely analyzed by using HPLC, GC-MS, and TOC techniques. The USEPA has prescribed a drinking water limit of 0.02 mg L-1, and it was found that 0.5 g of 4% W-TiO2 could totally degrade tetryl (50 mg L-1) within 8 h. The kinetic rate constant of 4% W-TiO2 was 0.356 h(-1), whereas pure TiO2 showed 0.207 h(-1).</p>
10aIonic liquid10aNitroaromatics10aPhotocatalysis10aRecycling of catalyst10aW-doped TiO210awastewater1 aRaut, Sandesh, S.1 aKamble, Sanjay, P.1 aKulkarni, Prashant, S.  uhttps://library.ncl.res.in/content/improved-photocatalytic-efficiency-tio2-doping-tungsten-and-synthesizing-ionic-liquid