Mohd Hasmizam Razali
Mohd Hasmizam Razali has a PhD degree in Materials Engineering (Nanomaterials) from Universiti Sains Malaysia (USM), MSc. in Chemistry (Catalyst) and B.Sc (Hons) in Chemical Industry from Universiti Teknologi Malaysia (UTM). Currently he is a Senior Lecturer at School of Fundamental Sciences, Universiti Malaysia Terengganu (UMT), Malaysia. He has published more than 50 technical papers in journals and conference proceedings locally and internationally related to the nanomaterials and functional materials research. Owing to their significant impacts to the science, economy and society, his innovative research and inventions have attracted global and national interests, enabling him to secure financial support from both private and government agencies. He has been awarded Who’s Who in the World for 3 years in a row 2013, 2014 and 2015 by The Marquis Who’s Who Publications Board. In 2014, the Cambridge Biographical Centre listed him as one of 2000 Outstanding Intellectuals of the 21st Century, due its ability to produce nanomaterials with tremendous improvement compared to conventional commercial materials. On top of that, he is also the recipient of the MAWHIBA Award and GENEVA Gold Medal Award in 1999.
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200 °C) on the products obtained by hydrothermal method was studied. Various characterization
techniques was carried out such as X-ray diffraction (XRD), field emission scanning electron
microscope (FESEM), energy dispersive of x-ray spectroscopy (EDX) and fourier transform infrared
spectroscopy (FTIR). XRD analysis shows that titanate phase was formed at 150 and 200 °C
hydrothermal treatment. On the other hand, at 100 °C anatase TiO2 phase structured was gained which is
similar with the TiO2 precursor. Morphological study using FESEM revealed that nanofibers and
nanorods samples obtained at 150 °C and 200 °C, respectively. At 100°C, irregular shaped particle was
attained similar with TiO2 precursors. FTIR spectra for the all studied sample displayed three main
broad peaks at the range of 3700-2800, and 1800-1400 assigned to –OH stretching and deformation
mode due to H2O molecules and M-O stretching mode at 900-400 cm-1 assigned to Ti-O bond
and catalyst, respectively, and are then functionalized using 3 aminopropyltriethoxysilane (APTES) through the co-condensation method and loaded with commercial TiO2. Results of X-ray powder
diffraction (XRD), Raman spectra, and Fourier transform infrared spectroscopy (FTIR) confirm that the synthesized CNTs grown are multi-walled carbon nanotubes (MWNTs). Transmission electron microscopy
shows good dispersion of TiO2 nanoparticles onto functionalized-CNTs loaded TiO2, with the diameter of a hair-like structure measuring between 3 and 8 nm. The functionalized-CNTs loaded TiO2
are tested as an adsorbent for removal of methyl orange (MO) in aqueous solution, and results show that 94% of MO is removed after 10 min of reaction, and 100% after 30 min. The adsorption kinetic model of
functionalized-CNTs loaded TiO2 follows a pseudo-second order with a maximum adsorption capacity of 42.85 mg/g. This study shows that functionalized-CNTs loaded TiO2 has considerable potential as an
adsorbent material due to the short adsorption time required to achieve equilibrium.
a capping agent were prepared with an aqueous precipitation technique at different pH levels to study the optimum condition for producing a narrow distribution of nanoparticles. The morphology of the prepared nanoparticles was measured by scanning electron microscopy (SEM). Grain sizes of the samples determined by X-ray Diffraction (XRD) with Scherer’s
equation were relatively dependet on the pH applied in the synthesized process. Infrared spectroscopy (FT-IR) indicated that the starch and the nanoparticles were bonded by R-N=C=S
bonds, but bondinbg depended on the pH used. The band gap of the CdS nanoparticles measured by UV-Vis spectroscopy was 2.39 eV, which was lower than CdS in bulk phase because of distorted structures in obtained CdS nanoparticles."
of larger particle size at high calcinations temperature, thereby reduces the surface area and active sites for photocatalytic degradation of methyl orange.
200 °C) on the products obtained by hydrothermal method was studied. Various characterization
techniques was carried out such as X-ray diffraction (XRD), field emission scanning electron
microscope (FESEM), energy dispersive of x-ray spectroscopy (EDX) and fourier transform infrared
spectroscopy (FTIR). XRD analysis shows that titanate phase was formed at 150 and 200 °C
hydrothermal treatment. On the other hand, at 100 °C anatase TiO2 phase structured was gained which is
similar with the TiO2 precursor. Morphological study using FESEM revealed that nanofibers and
nanorods samples obtained at 150 °C and 200 °C, respectively. At 100°C, irregular shaped particle was
attained similar with TiO2 precursors. FTIR spectra for the all studied sample displayed three main
broad peaks at the range of 3700-2800, and 1800-1400 assigned to –OH stretching and deformation
mode due to H2O molecules and M-O stretching mode at 900-400 cm-1 assigned to Ti-O bond
and catalyst, respectively, and are then functionalized using 3 aminopropyltriethoxysilane (APTES) through the co-condensation method and loaded with commercial TiO2. Results of X-ray powder
diffraction (XRD), Raman spectra, and Fourier transform infrared spectroscopy (FTIR) confirm that the synthesized CNTs grown are multi-walled carbon nanotubes (MWNTs). Transmission electron microscopy
shows good dispersion of TiO2 nanoparticles onto functionalized-CNTs loaded TiO2, with the diameter of a hair-like structure measuring between 3 and 8 nm. The functionalized-CNTs loaded TiO2
are tested as an adsorbent for removal of methyl orange (MO) in aqueous solution, and results show that 94% of MO is removed after 10 min of reaction, and 100% after 30 min. The adsorption kinetic model of
functionalized-CNTs loaded TiO2 follows a pseudo-second order with a maximum adsorption capacity of 42.85 mg/g. This study shows that functionalized-CNTs loaded TiO2 has considerable potential as an
adsorbent material due to the short adsorption time required to achieve equilibrium.
a capping agent were prepared with an aqueous precipitation technique at different pH levels to study the optimum condition for producing a narrow distribution of nanoparticles. The morphology of the prepared nanoparticles was measured by scanning electron microscopy (SEM). Grain sizes of the samples determined by X-ray Diffraction (XRD) with Scherer’s
equation were relatively dependet on the pH applied in the synthesized process. Infrared spectroscopy (FT-IR) indicated that the starch and the nanoparticles were bonded by R-N=C=S
bonds, but bondinbg depended on the pH used. The band gap of the CdS nanoparticles measured by UV-Vis spectroscopy was 2.39 eV, which was lower than CdS in bulk phase because of distorted structures in obtained CdS nanoparticles."
of larger particle size at high calcinations temperature, thereby reduces the surface area and active sites for photocatalytic degradation of methyl orange.