[1] Marchena C.L., Lerici L., Renzini S., Pierella L., Pizzio L., Synthesis and characterization of a novel tungstosilicic acid immobilized on zeolites catalyst for the photodegradation of methyl orange, Applied catalysis B: environmental, 2016, 188:23 [Crossref], [Google Scholar], [Publisher] [2] Carraro M., Gross S., Hybrid materials based on the embedding of organically modified transition metal oxoclusters or polyoxometalates into polymers for functional applications: A review, Materials, 2014, 7:3956 [Crossref], [Google Scholar], [Publisher] [3] Long D., Burkholder E., Cronin L., Polyoxometalate clusters, nanostructures and materials: From self-assembly to designer materials and devices, Chemical Society Reviews, 2007, 36:105 [Crossref], [Google Scholar], [Publisher] [4] Pope M.T., Müller A., Polyoxometalate chemistry: an old field with new dimensions in several disciplines. Angewandte Chemie International Edition in English, 1991, 30:34 [Crossref], [Google Scholar], [Publisher] [5]. Tangestaninejad S., Moghadam M., Mirkhani V., Mohammadpoor I., Salavati H., Vanadium-containing polyphosphomolybdate immobilized on TiO 2 nanoparticles: A recoverable and efficient catalyst for Photochemical, Sonochemical and photosonochemical degradation of dyes under irradiation of UV light, Journal of the Iranian Chemical Society, 2010, 7:161 [Crossref], [Google Scholar], [Publisher] [6]. Marchena C.L., Lerici L., Renzini S., Pierella L., Pizzio L., Synthesis and characterization of a novel tungstosilicic acid immobilized on zeolites catalyst for the photodegradation of methyl orange, Applied catalysis B: environmental, 2016, 188:23 [Crossref], [Google Scholar], [Publisher] [7]. Duncan D.C., Netzel T.L., Hill C.L., Early-time dynamics and reactivity of polyoxometalate excited states. Identification of a short-lived LMCT excited state and a reactive long-lived charge-transfer intermediate following picosecond flash excitation of [W10O32] 4-in acetonitrile, Inorganic Chemistry, 1995, 34:4640 [Crossref], [Google Scholar], [Publisher] [8]. Herrmann S., De Matteis L., de la Fuente J.M., Mitchell S.G., Streb, C., Removal of multiple contaminants from water by polyoxometalate supported ionic liquid phases (POM‐SILPs). Angewandte Chemie International Edition, 2017, 56:1 [Crossref], [Google Scholar], [Publisher] [9]. Chen C., Zhao W., Lei P., Zhao J., Serpone N., Photosensitized degradation of dyes in polyoxometalate solutions versus TiO2 dispersions under visible‐light irradiation: mechanistic implications. Chemistry–A European Journal, 2004, 10:1956 [Crossref], [Google Scholar], [Publisher] [10]. Lei P., Chen C., Yang J., Ma W., Zhao J., Zang L., Degradation of dye pollutants by immobilized polyoxometalate with H2O2 under visible-light irradiation, Environmental science & technology, 2005, 39:8466 [Crossref], [Google Scholar], [Publisher] [11]. Wang X., Chang Z., Lin H., Tian A., Liu G., Zhang J., Liu D., Two novel Anderson-type polyoxometalate-based metal–organic complexes with high-efficiency photocatalysis towards degradation of organic dyes under UV and visible light irradiation. Rsc Advances, 2015, 5:14020 [Crossref], [Google Scholar], [Publisher] [12]. Saleha T.A., Gupta V.K., Functionalization of tungsten oxide into MWCNT and its application for sunlight-induced degradation of rhodamine, BJ Colloid Interface Science., 2011, 362:337 [Crossref], [Google Scholar], [Publisher] [13]. Gupta V.K., Jain R., Mittal A., Saleh T.A., Nayak A., Agarwal S., Sikarwar S., Photo-catalytic degradation of toxic dye amaranth on TiO2/UV in aqueous suspensions. Materials science and engineering: C, 2012, 32:12 [Crossref], [Google Scholar], [Publisher] [14]. Mohammadi N., Khani H., Gupta V., Amereh E., Agarwal S., Adsorption process of methyl orange dye onto mesoporous carbon material–kinetic and thermodynamic studies. Journal of colloid and interface science, 2011, 362:457 [Crossref], [Google Scholar], [Publisher] [15]. Saravanan R., Karthikeyan S., Gupta V.K., Sekaran G., Narayanan V., Stephen A.J.M.C.,  Enhanced photocatalytic activity of ZnO/CuO nanocomposite for the degradation of textile dye on visible light illumination, Materials Science and Engineering: C, 2013, 33:91 [Crossref], [Google Scholar], [Publisher] [16]. Saleh T.A., Gupta V.K., Photo-catalyzed degradation of hazardous dye methyl orange by use of a composite catalyst consisting of multi-walled carbon nanotubes and titanium dioxide, Journal of colloid and interface science, 2012, 371:101 [Crossref], [Google Scholar], [Publisher] [17]. Saravanan R., Gracia F., Khan M.M., Poornima V., Gupta V., Narayanan V., Stephen A., ZnO/CdO nanocomposites for textile effluent degradation and electrochemical detection, Journal of molecular liquids, 2015, 209:374 [Crossref], [Google Scholar], [Publisher] [18]. Ahmaruzzaman M., Gupta V.K., Rice husk and its ash as low-cost adsorbents in water and wastewater treatment. Industrial & Engineering Chemistry Research,  2011, 50:13589 [Crossref], [Google Scholar], [Publisher] [19]. Gupta V.K., Srivastava S.K., Mohan D., Sharma S., Design parameters for fixed bed reactors of activated carbon developed from fertilizer waste for the removal of some heavy metal ions, Waste management, 1997, 17:517 [Crossref], [Google Scholar], [Publisher] [20]. Gupta V.K., Mittal A., Jharec D., Mittal J., Batch and bulk removal of hazardous colouring agent Rose Bengal by adsorption techniques using bottom ash as adsorbent, RSC advances, 2012, 2:8381 [Crossref], [Google Scholar], [Publisher] [21] Mittal A., Mittal J., Malviya A., Gupta V.K., Adsorptive removal of hazardous anionic dye “Congo red” from wastewater using waste materials and recovery by desorption, Journal of colloid and interface science, 2009, 340:16 [Crossref], [Google Scholar], [Publisher] [22] Zhang J., Tang Y., Li G., Hu C.,  Room temperature direct oxidation of benzene to phenol using hydrogen peroxide in the presence of vanadium-substituted heteropolymolybdates. Applied Catalysis A: General, 2005, 278:251 [Crossref], [Google Scholar], [Publisher] [23] Rocchiccioli C., Fournier M., Franck R., Thouvenot R., Vibrational investigations of polyoxometalates. 2. Evidence for anion-anion interactions in molybdenum (VI) and tungsten (VI) compounds related to the Keggin structure, Inorganic Chemistry, 1983, 22:207 [Crossref], [Google Scholar], [Publisher] [24] Jain N., Dwivedi M.K., Waskle A., Adsorption of methylene blue dye from industrial effluents using coal fly ash. International Journal of Advanced Engineering Research and Science, 2016, 3:2349 [Google Scholar], [Publisher]