Time‐ and Energy‐Efficient Solution Combustion Synthesis of Binary Metal Tungstate Nanoparticles with Enhanced Photocatalytic Activity. Issue 10 (22nd May 2015)

• Record Type: Journal Article
• Authors: Thomas, Abegayl; Janáky, Csaba; Samu, Gergely F.; Huda, Muhammad N.; Sarker, Pranab; Liu, J. Ping; van Nguyen, Vuong; Wang, Evelyn H.; Schug, Kevin A.; Rajeshwar, Krishnan
• Is Part Of: ChemSusChem. Volume 8:Issue 10(2015:May)
• Page Start: 1652
• Page End: 1663
• Publication Date: 2015-05-22
• Subjects: bandgap engineering -- combustion synthesis -- photocatalysis -- semiconductors -- solar energy; Green chemistry -- Periodicals; Sustainable engineering -- Periodicals; Chemistry -- Periodicals; Chemical engineering -- Periodicals; 660
• DOI: 10.1002/cssc.201500383
• Languages: English
• ISSNs: 1864-5631

Abstract

Abstract: In the search for stable and efficient photocatalysts beyond TiO2, the tungsten‐based oxide semiconductors silver tungstate (Ag2 WO4 ), copper tungstate (CuWO4 ), and zinc tungstate (ZnWO4 ) were prepared using solution combustion synthesis (SCS). The tungsten precursor's influence on the product was of particular relevance to this study, and the most significant effects are highlighted. Each sample's photocatalytic activity towards methyl orange degradation was studied and benchmarked against their respective commercial oxide sample obtained by solid‐state ceramic synthesis. Based on the results herein, we conclude that SCS is a time‐ and energy‐efficient method to synthesize crystalline binary tungstate nanomaterials even without additional excessive heat treatment. As many of these photocatalysts possess excellent photocatalytic activity, the discussed synthetic strategy may open sustainable materials chemistry avenues to solar energy conversion and environmental remediation. Abstract : In a New Tung state of mind: Binary tungstate nanoparticles are obtained within 5 min with very little energy input through solution combustion synthesis. The such‐prepared nanoparticulate samples outperform their commercial counterparts (synthesized using time‐ and energy‐inefficient methods) in photocatalytic tests. By applying a systematic analysis (including, for example, surface‐normalized dye‐adsorption and Rietveld refinement of XRD data) the reasons behind the improved photocatalytic performance are uncovered.