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Welcome Prof. Huai-Yong Zhu to our lab

报告题目:Development of Metal Nanoparticle as Direct Visible Light Photocatalyst for Organic Syntheses

:朱怀勇(ProfessorQueensland University of Technology)

报告时间:201646上午930

报告地点:福州大学怡山校区一楼科报厅

报告摘要:

Metal nanoparticles have proven successful in harvesting visible light across a wide range of wavelengths, efficiently converting the photon energy into the chemical energy for catalyzing important organic reactions at ambient temperatures. Due to their promise for energy efficient and environmentally sustainable chemical production using sunlight, theDirect Photocatalysts of Metal Nanoparticlesbecoming a class of new photocatalysts independent from semiconductors. Recent advances with direct photocatalysts of MNP under visible light are the photo-induced or photo-enhanced catalytic chemical transformations using metal nanoparticles supported on photocatalytically-inert materials (ZrO2, Al2O3etc.).

This is in stark contrast to the earlier perception of the metal nanoparticles’s traditional role as an enhancer of the catalytic performance of semiconductor. Representative examples include, azo compound synthesis with Au NP catalysts supported on ZrO2and the oxidation of ethylene to epoxides using Ag NP on Al2O3. To apply the visible light driven process to a wide range of organic synthesis, alloy nanoparticles s of a plasmonic metal (light harvesting antenna) and a non plasmonic metal (active center) is developed, which efficiently catalyse many reactions including seven cross-couplings, oxidative addition of benzylamine, dehydrogenation of aromatic alcohols, and one-step esterification of aliphatic alcohols. We also found that alloying small amounts of copper into gold nanoparticles could alter the reaction pathway of the catalytic reduction under visible-light irradiation, allowing nitroaromatics to be transformed directly to anilines in a highly selective manner. It demonstrates that tailoring the bimetallic alloy NPs of the photocatalysts is an effective approach for engineering of product chemoselectivity. We may also control reaction selectivity of the photocatalytic reactions by the irradiation wavelength.

Followed by our another benchmark discovery - numbers of non-plasmonic metal nanoparticles are proven to be effective and reaction specific direct photocatalysts without co-catalyst of semiconductors - the direct photocatalysts of metal nanoparticles s is no longer limited in plasmonic metals. Palladium (Pd), platinum (Pt), rhodium (Rh), and iridium (Ir) nanoparticles, supported on ZrO2show high photocatalytic activity towards several reactions including aryl chloride activation under visible light at room temperatures.

Timeline of Meta Naoparticle Direct Photocatalysts Development

作者简介

Prof Huai Yong Zhu received his PhD in Chemistry from University of Antwerp, Belgium in 1994. He carried

out research at Hiroshima University, Japan as research associate, and moved to University of Queensland, Australia in 1996. He was granted a Queen Elizabeth II research fellowship (2000–2004) by Australian Research Council, and granted the J. G. Russell Award by Australian Academy of Science. He joined University of Sydney, Australia as a Lecturer in 2002 and worked in Queensland University of Technology from 2005 till now.

Zhu’s group is focusing on the research area of direct photocatalysts of metal nanoparticles, intelligent sorbents for the removal of radioactive cations from water and filtration membranes of a ceramic nanofiber separation layer etc. With 170 papers published in peer-reviewed scientific journals on these research field, including J. Am. Chem. Soc., Angew. Chem. Int. Ed., Adv. Mater., ACS Nano and Energy & Environ. Sci. etc. His publications have been cited over 10200 times and have H index of 51.

He has been awarded, as the first named Chief Investigator, 7 Australian Research Council Discovery Projects consecutively since 2002. He has won over $3.5 million of research grants from Australian Research Council and inventor of 5 patents.