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RESEARCH PROFILE

Professor Dr. Jumras Limtrakul

Department of Materials Science and Engineering
School of Molecular Science and Engineering (MSE)
Tel. +66(0) 33 014001
Email jumras.limtrakul@vistec.ac.th

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Advanced functional materials by design and process engineering

 

Research Overview

Nanomaterials Design and Molecular Catalysis: Molecular design and reaction mechanism of nanosheet aluminosilicates, surface reactivity, structure-activity of petrochemical catalysts, application of molecular modelling aided molecular design for improved novel catalysts

About Prof. Jumras Limtrakul

Prof. Jumras Limtrakul has received many honors and awards, including the Alexander von Humboldt Research Fellow, Germany (1989-1990), Distinguished Thailand Research Fund Research Scholar from the Thailand Research Fund (1996-1997), National Outstanding Researcher Award from the National Research Council of Thailand (1998), TRF Senior Research Scholar (2002 and 2005) from the Thailand Research Fund, Thailand Outstanding Scientist Award from the Foundation for the Promotion of Science and Technology under the Patronage of His Majesty the King (2003), NSTDA Chair Professor (2009), National Outstanding Person of the year from the National Identity Board, Office of the Prime Minister (2010), The Council of University Faculty Senate of Thailand has named Prof. Dr. Jumras Limtrakul the 2011 outstanding professor in science and technology.
 

 

Science and engineering @

A cutting-edge scientific discovery of hierarchical aluminosilicate nanosheets for national demand and global challenges: We are one of the first teams to overcome a long-standing synthetic challenge: to smartly reengineer the conventional size aluminosilicate into its two-dimensional nano sheet. This cutting-edge nano sheet material will not only help to resolve the nation's demand but, in addition, will also certainly achieve "global innovation and research recognition".
Our team has investigated zeolitic structures and their industrially important reaction mechanisms and our scientific research impacts are world ranked in the top 3 for the world’s largest citation Scopus database in the fields of science, technology, and medicine. We would like to develop a state-of-the-art method, which can be practically utilized and easily applied by scientists and engineers in different subject areas.
“We believe that our innovative design and synthetic approaches for the new discovery of “energy advanced materials” (such as 2-D zeolite, Yin-yang Hybrid particle having different functionalities and chiral-imprinted nano-MAT) will contribute to engineer for certain important functional materials with various applications in the nation’s demands and challenges in energy, environmental and health issues”.

 

 

Molecular and Engineering Catalysis

Site-selective synthesis of Janus-type Metal-Organic Framework composites recently appeared as cover journal in the world’s best chemical science & technology dubbed

Metal-organic framework (MOF) are supermolecules that have become very important in recent years. Their potential applications range from sensing to catalysis and energy storage. Bipolar electrochemistry a very modern electrochemical technique using high electric fields that can be used to the site-selective in situ synthesis of MOFs. The important discovery is that a MOF can be deposited to a substrate so that it is restricted to a defined area without using masks or templates. The intrinsic site selectivity of bipolar electrochemistry - every electric field has a positive and negative site - makes it a method of choice to generate hybrid particles in a highly controlled way. Such particles have different functionalities combined on the same particle and are therefore called Janus-type particles. Bipolar electrodeposition is not restricted to electrodes but occurs in the three- dimensional media and thus allows for mass production of such Janus-type objects.
Fabrication of chiral-imprinted mesoporous platinum films published in NATURE Communications

Chiral molecules come in pairs of mirror images like a left and right hand or glove. Such molecules are called enantiomers and often they have to separate from each other because only one of the two has desired properties in catalysis, sensing and life sciences. Despite of the fact that chirality is widespread in natural systems, this is a major scientific challenge. Molecular imprinting is a well-known approach for generating materials with the ability to recognize one enantiomer only and has been successfully employed using polymers. However, it is particularly difficult to synthesize chiral metal matrices. Here we report the fabrication of a chirally imprinted mesoporous metal, obtained by the electrochemical reduction of platinum salts in the presence of a liquid crystal phase and chiral template molecules. The porous platinum metal matrix retains its chiral character after removal of the template molecules. An electrode consisting of it has both a large active surface area due to the mesoporosity and distinguishes significantly between two enantiomers - like a glove that only fits to the left or right hand only.

Innovative design and synthetic approaches for the new discovery of “ENERGY ADVANCED MATERIALS”, two-dimensional nanosheet zeolite

We report a straight forward technique that allows an easy, simple and efficient synthesis, and, if desired, a controlled structure and the catalytic properties of nanosheet FAU zeolite. The method uses a simple structure directing surfactant of organosilane with its concentration optimized along with well controlled temperature, leading to different structures of nanosheet and mesoporous zeolites. The well-designed nanosheet zeolites exhibit a remarkable catalytic activity for benzylation of toluene. This active and long-lived nanosheet of the FAU catalyst results in a higher conversion of benzylation of Toluene without deactivation as compared to conventional zeolites. The thickness of zeolite can be systematically controlled, which facilitates their further applications.