Enhanced catalytic activity of CuPd alloy nanoparticles towards reduction of nitroaromatics and hexavalent chromium

详细信息    查看全文

• 作者：Himadri Saikia^a ; Biraj Jyoti Borah^a ; Yusuke Yamada^b ; Pankaj Bharali^a ; ^{pankajb@tezu.ernet.in" class="auth_mail" title="E-mail the corresponding author}
• 关键词：Bimetallic nanoparticles ; Nanocatalyst ; Reduction reaction ; 4-Nitrophenol ; 4-Nitroaniline ; Cr(VI)
• 刊名：Journal of Colloid and Interface Science
• 出版年：2017
• 出版时间：15 January 2017
• 年：2017
• 卷：486
• 期：Complete
• 页码：46-57
• 全文大小：3552 K

文摘

The present work reports a surfactant-free, economically feasible chemical route to synthesize bimetallic CuPd alloy nanoparticles under hydrothermal condition. The structural and morphological characterizations of the nanoparticles are carried out by XRD, SEM/EDX, TEM, XPS and BET surface area analyses. The synthetic strategy comprises of 9:1 molar composition of Cu²⁺ and Pd²⁺ salt in the aqueous solution. The size of the nanoparticles isca. 3–4 nm with very notable specific surface area of 298 m² g⁻¹. The synthesized nanoparticles exhibit excellent catalytic performance towards the aqueous phase reduction of 4-nitrophenol and 4-nitroaniline in the presence of NaBH₄ as a reducing agent. Furthermore the CuPd alloy nanoparticles also demonstrate remarkable activity towards reductive conversion of toxic Cr(VI) to less toxic Cr(III) at room temperature. Bimetallic CuPd alloy nanoparticles are catalytically more active and exhibit good recyclability in comparison to the monometallic Cu and Pd due to synergistic effect.