Malaysian Journal of Analytical Sciences Vol 26 No 2 (2022): 191 - 201

 

 

 

 

A SHORT REVIEW ON THE INFLUENCE OF THE PREPARATION METHOD ON THE PHYSICOCHEMICAL PROPERTIES OF Mg/Al HYDROTALCITE FOR GLUCOSE ISOMERIZATION

 

(Ulasan Ringkas Mengenai Pengaruh Kaedah Penyediaan Terhadap Sifat-Sifat Fizikokimia Mg/Al Hidrotalsit untuk Pengisomerisasi Glukosa)

 

Munirah Zulkifli^1,2, Noor Hidayah Pungot^1,2*, Nazrizawati Ahmad Tajuddin¹, Mohd Fadhlizil Fasihi Mohd Aluwi³, Nor Saliyana Jumali⁴, Zurina Shaameri^1,2

 

¹School of Chemistry and Environment, Faculty of Applied Sciences,

Universiti Teknologi MARA, 40450 Shah Alam, Selangor, Malaysia

²Organic Synthesis Laboratory, Institute of Science,

Universiti Teknologi MARA Puncak Alam Campus, 42300 Bandar Puncak Alam, Selangor, Malaysia

³Faculty of Industrial Sciences and Technology,

Universiti Malaysia Pahang, Lebuhraya Tun Razak, 26300 Gambang, Kuantan, Pahang, Malaysia

⁴ Department Chemistry, Kulliyyah of Science,

International Islam University Malaysia, 25200 Bandar Indera Mahkota, Kuantan, Pahang, Malaysia

 

*Corresponding author:  noorhidayah977@uitm.edu.my

 

 

Received: 15 September 2021; Accepted: 3 February 2022; Published:  28 April 2022

 

 

Abstract

Hydrotalcite (Mg₆Al₂(OH)₁₆CO₃4H₂O) is a naturally occurring anionic clay with a layered crystal structure. Hydrotalcites is classified as heterogeneous catalysts that exhibit an excellent separation post-reaction. Furthermore, commercial hydrotalcites are environmentally friendly. Organically synthesised hydrotalcites have attracted numerous researchers. The compounds are crucial solid base materials for several organic reactions, such as the Aldol condensation, Knoevenagel, Claisen-Schmidt, and Michael addition reactions. The present review covers the synthesis of magnesium aluminide (MgAl) hydrotalcites with varying magnesium to aluminium (Mg/Al) molar ratios employed to prepare the catalyst. Additionally, the characterisation of MgAl hydrotalcites with X-ray diffraction (XRD), Brunauer-Emmett-Teller (BET), and scanning electron microscopy (SEM) are highlighted. The instruments were utilised to identify the physicochemical properties of the catalyst, including crystallinity, surface area, and morphology. The catalytic activity of MgAl hydrotalcite was explored in the isomerisation of glucose into fructose as a model reaction for the catalytic performance.  

 

Keywords:  MgAl hydrotalcite, Mg/Al molar ratio, physicochemical properties, catalytic activity

 

Abstrak

Hidrotalsit (Mg₆Al₂(OH)₁₆CO₃4H₂O) ialah tanah liat anionik yang wujud secara semula jadi dengan struktur kristal berlapis. Hidrotalsit dikelaskan sebagai pemangkin heterogen yang mempamerkan pemisahan selepas tindak balas yang sangat baik. Tambahan pula, hidrotalsit komersial adalah mesra alam. Hidrotalsit yang disintesis secara organik telah menarik ramai penyelidik. Sebatian tersebut merupakan bahan asas pepejal yang penting untuk beberapa tindak balas organik, seperti tindak balas kondensasi Aldol, Knoevenagel, Claisen-Schmidt, dan penambahan Michael. Ulasan semula ini meliputi sintesis magnesium aluminida (MgAl) hidrotalsit dengan pelbagai nisbah molar magnesium kepada aluminium (Mg/Al) digunakan untuk menyediakan mangkin. Selain itu, pencirian hidrotalsit MgAl dengan pembelauan sinar-X (XRD), Brunauer-Emmett-Teller (BET), dan mikroskop elektron pengimbasan (SEM) diserlahkan. Instrumen ini telah digunakan untuk mengenal pasti sifat fizikokimia mangkin, termasuk kehabluran, luas permukaan, dan morfologi. Aktiviti pemangkin hidrotalsit MgAl telah diterokai dalam pengisomeran glukosa kepada fruktosa sebagai tindak balas model untuk prestasi pemangkin.

 

Kata kunci:  MgAl hidrotalsit, nisbah molar Mg/Al, sifat-sifat fizikokimia, aktiviti pemangkin

 

 

 

Graphical Abstract

 

 

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