Mohd Fairul Sharin Abdul Razak
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Mohd Fairul Sharin Abdul Razak
Official Name
Mohd Fairul Sharin, Abdul Razak
Alternative Name
Razak, Mohd Fairul Sharin Abdul
Razak, Mohd Fairul Shahrin Abd
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Scopus Author ID
57219181022

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  • Publication
    The Effect of GO/TiO2 Thin Film During Photodegradation of Methylene Blue Dye
    ( 2021)
    Azliza Azani
    ;
    Dewi Suriyani Che Halin
    ;
    Mohd. Mustafa Al Bakri Abdullah
    ;
    Kamrosni Abdul Razak
    ;
    Mohd Fairul Sharin Abdul Razak
    ;
    V Chobpattana
    ;
    Mohd Arif Anuar Mohd Salleh
    ;
    Muhammad Mahyiddin Ramli
    Titanium (IV) isopropoxide (TTIP) was used to synthesize GO/TiO2 thin films using a sol-gel spin-coating method onto a glass substrate, undergoing an heat tretment at 350 °C. Several amounts of graphene oxide (GO) (0-20mg) were weighed into a sol solution of TiO2 to produce GO/TiO2 thin films. The thin film samples were characterized by X-ray diffraction (XRD) to analyze the samples’ phase and by scanning electron microscopy (SEM) to analyze the samples’ microstructure. Physical testing such as water contact angle (WCA) was analyzed using an optical microscope with J-Image software. In contrast, the optical band gap and photodegradation of methylene blue under sunlight irradiation of the thin film was analyzed using UV-VIS spectrophotometry. GO5 thin film sample showed low-intensity anatase phase formation, where the microstructure revealed a larger surface area with the addition of GO. WCA reveals that GO/TiO2 thin film exhibits super hydrophilic properties where the angle decreases from 37.83° to 4.11°. The optical result shows that GO has improved the absorption edges by expanding into visible regions. Moreover, due to the existence of GO 3.30 eV band gap energy of TiO2 decreases from to 3.18 eV obtained by GO5. The improved adsorption edge allows Ti3+, O2 and interstitial states to be formed in low valence states with energy underneath than in the TiO2 band gap. Therefore, the photodegradation of methylene blue (MB) dye increases from 48 % to 59 % in the GO/TiO2 thin film.
  • Publication
    The effect of polyethylene glycol addition on wettability and optical properties of GO/TiO2 thin film
    ( 2021)
    Azliza Azani
    ;
    Dewi Suriyani Che Halin
    ;
    Kamrosni Abdul Razak
    ;
    Mohd. Mustafa Al Bakri Abdullah
    ;
    Marcin Nabiałek
    ;
    Muhammad Mahyiddin Ramli
    ;
    Mohd Fairul Sharin Abdul Razak
    ;
    Andrei Victor Sandu
    ;
    Wojciech Sochacki
    ;
    Tomasz Skrzypczak
    Modification has been made to TiO2 thin film to improve the wettability and the absorption of light. The sol-gel spin coating method was successfully used to synthesize GO/TiO2 thin films using a titanium (IV) isopropoxide (TTIP) as a precursor. Different amounts of polyethylene glycol (PEG) (20 to 100 mg) were added into the parent sol solution to improve the optical properties and wettability of the GO/TiO2 thin film. The effect of different amounts of PEG was characterized using X-ray diffraction (XRD) for the phase composition, scanning electron microscopy (SEM) for microstructure observation, atomic force microscopy (AFM) for the surface topography, ultraviolet–visible spectrophotometry (UV-VIS) for the optical properties and wettability of the thin films by measuring the water contact angle. The XRD analysis showed the amorphous phase. The SEM and AFM images revealed that the particles were less agglomerated and surface roughness increases from 1.21 × 102 to 2.63 × 102 nm when the amount of PEG increased. The wettability analysis results show that the water contact angle of the thin film decreased to 27.52° with the increase of PEG to 80 mg which indicated that the thin film has hydrophilic properties. The optical properties also improved significantly, where the light absorbance wavelength became wider and the band gap was reduced from 3.31 to 2.82 eV with the presence of PEG.
  • Publication
    Graphene-modified TiO2as photoanode using agarose gel electrolyte for dye-sensitized solar cell
    ( 2022-05-18)
    Mohd Fairul Sharin Abdul Razak
    ;
    Afzalina Badri
    ;
    Nawawi W.I.
    ;
    Norhayati Sabani
    ;
    Mohammad Kahar Ab Wahab
    ;
    Amira Abul Shukor
    A newly developed biopolymer agarose gel electrolyte along with titanium dioxide-graphene (TiO2-G) as a photoanode in Dye-Sensitized Solar Cell (DSSC) was prepared and investigated towards green approaches and electrolyte stability. To develop a biopolymer electrolyte, potassium iodide was added to the agarose biopolymer matrix to produce a gel electrolyte system. As for the photoanode, TiO2 with different graphene concentrations was prepared. It was recorded that the bandgap was reduced from 3.0 eV to 2.50 eV with the increasing graphene concentration. The formation of agarose gel electrolyte and TiO2-Graphene photoanode were determined by the FTIR analysis. Meanwhile, XRD analysis was conducted to identify the crystallinity of agarose gel electrolyte and TiO2-G affecting the performance of the cell. The XRD spectra measured in a range of 2θ from 5° to 80° showed a diffraction peak at 2θ = 22°, 25.5° and 36° for agarose gel electrolyte and 2θ = 24.88° for TiO2-Graphene. The results illustrated that the TiO2-G combination improves the crystallinity and thus exhibits higher surface area and mesoporous structure for better electrical conductivity and simultaneously strikes the performance stability of DSSC.
  • Publication
    Preparation and characterization of NE-7150 and NE-7170 silicone rubber blend with different ratios and curing agents loading
    ( 2022-05-18)
    Chew Jie Yi
    ;
    Mohamad Kahar Abdul Wahab
    ;
    Nur Afikah Zulkeply
    ;
    Hayeemasae N.
    ;
    Mohd Fairul Sharin Abdul Razak
    Silicone rubbers are elastomers which are composed of silicone, carbon, hydrogen and oxygen. It is widely used in industry and many applications in our daily life. Basically, silicone rubbers can be divided into solid or liquid form. Uncured rubbers are required to undergo vulcanization process with a curing agent or cross-linking agent to produce useful products. Silicone rubbers can be molded into many shapes and designs due to its ease of processing. In this research project, silicone rubbers NE-7150 and NE-7170 were used in the blend in different types of curing agents. Two different vulcanization systems were involved which were peroxide C-15 vulcanization system and platinum C-25A & C-S5B catalysts hydrosilylation. Platinum can offer the silicone rubbers to cure with higher cross-linking density and result in good swelling and mechanical properties. However, as the cross-linking density increases and the rubbers become harder, the percentage elongation at break of the rubbers will drop. Fourier Transform Infrared Spectroscopy (FTIR) test was carried out to investigate the structure formation of silicone rubbers. The uncured and cured rubbers showed similar results as the curing of rubbers only happened within the C-C bonds. In Scanning Electron Microscopy (SEM), the surface morphology of the rubber samples was obtained and the existence of rough surfaces on the platinum cured rubbers indicate it cured with more cross-links than peroxide cured rubbers.
  • Publication
    Preparation of water-base immobilized N doped TiO2 using DSAT technique for photocatalytic degradation of methylene blue dye
    ( 2022-01-01)
    Natar N.S.
    ;
    Ikhwan S.
    ;
    Nazeri N.S.
    ;
    Hamzah S.R.
    ;
    Rosli M.A.
    ;
    Ghani N.I.
    ;
    Ishak M.A.M.
    ;
    Mohd Fairul Sharin Abdul Razak
    ;
    Azami M.S.
    ;
    Nawawi W.I.
    Photocatalytic degradation of TiO2 photocatalyst under suspension mode has widely been studied among researchers. However, the application is limited due to the complexity in separation and non-recyclability of photocatalyst. Immobilization is one of the promising methods to overcome this problem. Most of the prepared immobilization modes showed lower photocatalytic activity compared with the suspension due to the chemical reaction of solvent with modified TiO2. Therefore, a free solvent or water-base preparation of immobilized TiO2 is critical in retaining its photocatalytic activity. Immobilization via double-sided adhesive tape (DSAT) was introduced previously by our research team, it works the best of others in replacing polymer binder in immobilization system making it a free solvent preparation process. The aim of this research is to prepare immobilized unmodified TiO2 and N doped TiO2 by using water-base DSAT technique. The presence of N element was detected for all modified N doped TiO2 samples confirmed by FTIR and EDX analysis. The N incorporated in modified TiO2 has reduced the band gap energy from 3.0 to 2.8 eV as observed by UV–Vis/DRS analysis. This explained the photoactivity under MB dye degradation is 2.1 times faster under N doped TiO2 where the photodegradation rate for unmodified and optimum N doped TiO2 (TN1-45) were 0.065 and 0.138 min−1 respectively. Immobilized TiO2/DSAT and TN1-450/DSAT have shown a significant photocatalytic performance where it was only reduced to 15% from suspension to immobilized mode. It can be considered higher performance as compared to the normal immobilization under solvent. It also better than suspension mode by considering of its reusability that able to sustain the photoactivity of immobilized TN1-450/DSAT for at least for 12 cycles.
  • Publication
    Comparison between the Tensile, Water Absorption and Flammability Properties of Recycled High-Density Polyethylene/Rice Husk Composite from Twin-Screw Extruder and Heated Two-Roll Mill
    ( 2022-01-01)
    Mohd Nazry Salleh
    ;
    Roslaili Abdul Aziz
    ;
    Shan C.R.
    ;
    Luqman Musa
    ;
    Mohd Fairul Sharin Abdul Razak
    ;
    Nabialek M.
    ;
    Jez B.
    This study compares the mechanical properties of recycled high-density polyethylene (r-HDPE)/rice husk (RH) composites from a twin-screw extruder and a heated two-roll mill, and the effect of different filler loadings using different melt blending processes on the mechanical properties of r-HDPE/RH composites. Polyethylene-graft-maleic anhydride (MAPE) acts as the coupling agent to enhance interfacial bonding between the fibre and the polymer matrix. The filler loading used was in the range of 10-40 wt. %. In this work, r-HDPE/RH blends were prepared using a twin-screw extruder and a heated two-roll mill. The ratio of 70/30 twin-screw extruder compounded composites significantly showed higher tensile based on improved to about 45.5% at 11 MPa compared to those compounded in the heated two-roll mill. The same ratio showed an increment almost up to 9% of elongation at break. It has also been verified that the higher filler loading used reduced the tensile strength and elongation at break, while the Young's modulus increased. The result was evidenced by the increase in water absorption and longer burning time as the filler loading increased.
  • Publication
    The study and preparation of polyaniline-graphene oxide as robust counter electrode for dye-sensitized solar cells
    ( 2022-05-18)
    Mohd Fairul Sharin Abdul Razak
    ;
    Amira Abul Shukor
    ;
    Mohd Nazry Salleh
    ;
    Nawawi W.I.
    ;
    Norhayati Sabani
    ;
    Afzalina Badri
    The study of alternative materials and platinum-free counter electrodes (CE) for the development of dye- sensitized solar cells (DSSC) has been highlighted nowadays. Polyaniline (PANI) is one of the most common conducting polymers applied in electrochemical energy storage and conversion technologies such as supercapacitors, rechargeable batteries and fuel cells. However, PANI counter electrodes lack long-term stability due to their low surface area and large volume changes during the release of ions. In that regard, this research work focused on the modification of protonated PANI with graphene oxide (GO) at various weight percentages (wt%) in order to obtain robust CE in DSSC. The structure and formation of PANI, GO and PANI/GO were characterized by Fourier transform infrared (FT-IR) and X-ray diffraction (XRD) analyses. The absorption spectra showed all the characteristic bands of GO, PANI(ES) and PANI/GO. Meanwhile, the incorporation of GO into PANI has enhanced the crystallinity of the composite. As a result, power conversion efficiency (PCE%) of the device with PANI/GO 3 wt% as the counter electrode reaches 6.39%. The excellent photoelectric properties, simple preparation procedure and inexpensive cost allow the PANI/GO electrode to be a credible alternative for DSSCs.
  • Publication
    The effect of GO/TiO2 thin film during photodegradation of methylene blue dye
    ( 2021-09-01)
    Azliza Azani
    ;
    Dewi Suriyani Che Halin
    ;
    Mohd. Mustafa Al Bakri Abdullah
    ;
    Kamrosni Abdul Razak
    ;
    Mohd Fairul Sharin Abdul Razak
    ;
    Muhammad Mahyiddin Ramli
    ;
    Mohd Arif Anuar Mohd Salleh
    ;
    Chobpattana V.
    Titanium (IV) isopropoxide (TTIP) was used to synthesize GO/TiO2 thin films using a sol-gel spin-coating method onto a glass substrate, undergoing an heat tretment at 350 °C. Several amounts of graphene oxide (GO) (0-20mg) were weighed into a sol solution of TiO2 to produce GO/TiO2 thin films. The thin film samples were characterized by X-ray diffraction (XRD) to analyze the samples’ phase and by scanning electron microscopy (SEM) to analyze the samples’ microstructure. Physical testing such as water contact angle (WCA) was analyzed using an optical microscope with J-Image software. In contrast, the optical band gap and photodegradation of methylene blue under sunlight irradiation of the thin film was analyzed using UV-VIS spectrophotometry. GO5 thin film sample showed low-intensity anatase phase formation, where the microstructure revealed a larger surface area with the addition of GO. WCA reveals that GO/TiO2 thin film exhibits super hydrophilic properties where the angle decreases from 37.83° to 4.11°. The optical result shows that GO has improved the absorption edges by expanding into visible regions. Moreover, due to the existence of GO 3.30 eV band gap energy of TiO2 decreases from to 3.18 eV obtained by GO5. The improved adsorption edge allows Ti3+, O2 and interstitial states to be formed in low valence states with energy underneath than in the TiO2 band gap. Therefore, the photodegradation of methylene blue (MB) dye increases from 48 % to 59 % in the GO/TiO2 thin film.
  • Publication
    Morphological analysis on crosslinked plasticized starch filled with microcrystalline cellulose
    ( 2021-05-03)
    Foong J.Y.
    ;
    Mohamad Kahar Ab Wahab
    ;
    Mohd Fairul Sharin Abdul Razak
    ;
    Yusrina Mat Daud
    This work investigates the effect of the photo and peroxide crosslinked thermoplastic starch on the morphological properties of thermoplastic starch (TPS) / microcrystalline cellulose (MCC) films. Granulated starch will converted into thermoplastic like in the presence of glycerol as plasticizer. The amount of MCC filler carried out in this research is 0 %, 3 %, 6 %, 9 % and 12 % of the dry weight of starch. The morphological properties of photo-crosslinked TPS and peroxide crosslinked TPS were were analysed by using scanning electron microscope (SEM) and optical microscope for soil burial and weathering test. Each formulation has undergone tensile test to study their stress-strain properties and the optimum formula is obtained for subsequent studies. The increasing MCC loading increase the tensile properties of the TPS/MCC up to 6% MCC as support by morphology study. The increament in tensile strength was confirmed by the SEM study that showed better dispersion of MCC in the TPS matrix and exhibited coarser surfaces as compared to uncrosslinked counterpart. The TPS/MCC films also can last more than 20 days under soil burial test. The thermoplastic starch films will start to degrade after placed under normal weathering conditions for 20 days while the addition of rainfall will also accelerate the degradation process.
  • Publication
    Effect of thermally treated rice husk on the rice husk/LDPE composites with and without MAPE
    ( 2022-05-18)
    Nurliyana Nasrin Juhardi
    ;
    Mohd Nazry Salleh
    ;
    Roslaili Abdul Aziz
    ;
    Luqman Musa
    ;
    Mohd Fairul Sharin Abdul Razak
    ;
    Hanafi I.
    In this project, extruded rice husk (RH) / low density polyethylene (LDPE) with and without maleic anhydride (MAPE) were thermally treated at temperatures of 105C and 125C. The duration of annealing was carried out to one and three hours before going through to the injection moulding to get the dumbbell shape for tensile testing. From the testing, the trend of results obtained where tensile and modulus of elasticity of RH/LDPE increase with temperature of 125 C which are 5 MPa and 261 MPa respectively. However, the elongation at break shows a reduction value where 105 C temperature is 12% while 125C is 8%. Results obtained for RH/LDPE with and without MAPE show the composites with added MAPE have better tensile strength and modulus of elasticity. Meanwhile, the elongation at break of composites with MAPE is lower than composites without MAPE.