Research Article H-ZSM-5 Zeolite Synthesis by Sourcing Silica from the Wheat Husk Ash: Characterization and Application as a Versatile Heterogeneous Catalyst in Organic Transformations including Some Multicomponent Reactions Isak Rajjak Shaikh, 1,2,3 Rafique Ahmed Shaikh, 4 Alamgir Abdulla Shaikh, 2 Javeed Ahmad War, 5 Shankar Poshetti Hangirgekar, 6 Ahmad Lalahmad Shaikh, 6 Parveen Rajjak Shaikh, 7 and Rafik Rajjak Shaikh 8 1 Department of Chemistry, Shri Jagdishprasad Jhabarmal Tibrewala University (JJTU), Vidyanagari, Chudela, Jhunjhunu District, Rajasthan 333 001, India 2 Post Graduate and Research Centre, Department of Chemistry, Poona College of Arts, Science and Commerce, Military Camp Area, Pune, Maharashtra 411 001, India 3 Razak Institution of Skills, Education and Research (RISER), H.Q.: 1-9-722, Shrinagar, Near Rafaiya Masjid and Hanuman Mandir, Nanded, Maharashtra 431 605, India 4 Division of Heterogeneous Catalysis, CSIR-National Chemical Laboratory (NCL), Dr. Homi Bhabha Road, Pune, Maharashtra 411 008, India 5 Department of Chemistry, Dr. Harisingh Gour Central University (DHSGCU), Sagar, Madhya Pradesh, India 6 School of Chemical Sciences, Swami Ramanand Teerth Marathwada University (SRTMU), Vishnupuri, Nanded, Maharashtra 431 601, India 7 School of Earth Sciences, Swami Ramanand Teerth Marathwada University (SRTMU), Vishnupuri, Nanded, Maharashtra 431 601, India 8 Department of Chemistry, Central University of Rajasthan (CURAJ), NH-8, Bandar Sindri, Kishangarh, Ajmer District, Rajasthan 305 801, India Correspondence should be addressed to Isak Rajjak Shaikh; isak@india.com Received 9 July 2014; Accepted 13 October 2014 Academic Editor: Sankaranarayana Pillai Shylesh Copyright © 2015 Isak Rajjak Shaikh et al. his is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. ZSM-5 zeolite was synthesized by sourcing silica from wheat husk ash and was converted into its protonated form following careful, conventionally accepted ion-exchange method and calcinations. he H-ZSM-5 zeolite (Si/Al ratio = 30) prepared was appropriately characterized by XRD, FT-IR, SEM, TEM, TG-DTA, CV, and so forth, and evaluated as recyclable catalyst in selective organic transformations including three- and four-component reactions. he catalytic activity of the zeolite sample supposedly relates to increased density of the accessible acid sites. 1. Introduction Zeolites and related nanoporous materials are widely used as adsorbents, ion-exchangers, and catalysts [1]. In oil and chemical industries, the employment of zeolites as acid cracking catalysts [2] is such that some 350,000 tonnes are used annually for this purpose. Zeolites are a well-deined class of crystalline aluminosilicates [3]. By deinition, the zeo- lite synthesis generally takes place under high pH conditions and involves crystallization from an inhomogeneous gel of Hindawi Publishing Corporation Journal of Catalysts Volume 2015, Article ID 805714, 14 pages http://dx.doi.org/10.1155/2015/805714