Mohd Fairul Sharin Abdul Razak
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Preferred name
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 study and preparation of polyaniline-graphene oxide as robust counter electrode for dye-sensitized solar cells
    ( 2022-05-18)
    Mohd Fairul Sharin Abdul Razak
    ;
    Shukor A.A.
    ;
    Mohd Nazry Salleh
    ;
    Nawawi W.I.
    ;
    Norhayati Sabani
    ;
    Badri A.
    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
    Effect of Surface Treatment on Mechanical Properties of Rice Husk Reinforced Recycled High Density Polyethylene (rHDPE) Composites
    ( 2020-11-24)
    Mohd Nazry Salleh
    ;
    Roslaili Abdul Aziz
    ;
    Mohd Fairul Sharin Abdul Razak
    ;
    Luqman Musa
    ;
    Ying H.L.
    The aim of this work was to investigate the effect of surface treatment on rice husk reinforced recycled high density polyethylene (rHDPE) composites. Three types of surface treatment on rice husk were carried out which were maleated treatment, alkaline treatment and acrylic acid treatment. The characteristics and mechanical properties of the composites were analysed. The results for all treatments showed that tensile strength and break elongation of composites decreased significantly when the rice husk filler loading increased. Further findings showed that maleated treatment on rice husk can further enhance the mechanical properties due to the present of ester bond formed in FTIR analysis.
  • Publication
    Effect of Photoetching Process onto Immobilized PANI/TiO2Films towards Photocatalytic Degradation of RR2 dye
    ( 2020-11-24)
    Mohd Fairul Sharin Abdul Razak
    ;
    Mohd Nazry Salleh
    ;
    Nawawi W.I.
    ;
    Natar N.
    Polyaniline (PANI) and P-25 Titanium dioxide (TiO2) was fabricated as immobilized P-25TiO2/PANI/ENR/PVC film and reported on the photocatalytic study. PANI and TiO2 was immersed into the organic solvent and being coated onto glass plates under influenced of ENR/PVC polymeric binder by using a dip-coating method. It was found that, the removal of RR2 dye nearly good as suspension system after the pre-irradiation process. Based on COD and BET results, it showed that the optimum time of etching process was 7 hours irradiation time. This pre-irradiation process enhanced the removal of dye due to leached out of excessive binder and also exhibit visible light active after insertion of PANI into the immobilized system.
  • 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
    Effect of surface treatment on water absorption of rice husk reinforced recycled high density polyethylene (RHDPE) composites.
    ( 2021-05-03)
    Mohd Nazry Salleh
    ;
    Roslaili Abdul Aziz
    ;
    Luqman Musa
    ;
    Mohamad Syahmie Mohamad Rasidi
    ;
    Mohd Fairul Sharin Abdul Razak
    ;
    Hong L.Y.
    The goal of this study was to investigate the effect of surface treatment on rice husk reinforced recycled high density polyethylene (rHDPE) composites. Three types of surface treatments on rice husk were carried out which were maleated treatment, alkali treatment and acrylic acid treatment. Water absorption test was examined in distilled water. It showed that the lower the loading of rice husk, the lower the water absorption percentage. Maleated treatment on rice husk reinforced rHDPE has the highest resistance of water absorption tendency. Scanning electron microscope analysis of the composites showed that the lower the rice husk loading, the better the interfacial bonding of the composites. Maleated treatment of rice husk also showed that there is no gaps formed in the structure.
  • 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.
      1
  • Publication
    Low temperature prepared N doped TiO2photodegradation of janus green B
    ( 2020-11-24)
    Othman S.A.
    ;
    Zainon S.N.
    ;
    Abdullah M.F.
    ;
    Nawawi W.I.
    ;
    Ikhwan S.
    ;
    Mohd Fairul Sharin Abdul Razak
    N doped titanium dioxide (TiO2) was prepared under low temperature calcination of TiO2 Degussa P25 powder and urea at various mixing ratios. Muffle furnace was used as heating media with the temperature used in the range of 300 to 500 C. The prepared N doped TiO2 was characterized by using UV-Vis diffuse reflectance spectroscopy (DRS), Fourier transform infrared (FT-IR) and scanning electron microscopy (SEM). It was observed that N doped TiO2 prepared at 0.5 g urea under the 400 C calcination process (named as U2-400) is the optimum photocatalyst sample with the highest rate removal of Janus green B (JG) dye. The U2-400 had goes the photodegradation rate removal at 0.1071 min-1 where it is 3.5 times faster compared to unmodified TiO2 sample. The high photodegradation rate removal for U2-400 was due to the N incorporated with TiO2 in U2-400 photocatalyst which narrowed the bandgap energy from 3.2 to 3.0 eV as observed by UV-Vis DRS spectra. This shows the U2-400 sample has increased its photocatalytic activity since it has become more active under wider an optical response compared to the unmodified TiO2
      1
  • Publication
    Effect of polyethylene glycol and sodium dodecyl sulphate on microstructure and self-cleaning properties of graphene oxide/TiO2 thin film
    ( 2020-09-01)
    Azani A.
    ;
    Dewi Suriyani Che Halin
    ;
    Kamrosni Abdul Razak
    ;
    Mohd. Mustafa Al Bakri Abdullah
    ;
    Norsuria Mahmed
    ;
    Muhammad Mahyiddin Ramli
    ;
    Mohd Arif Anuar Mohd Salleh
    ;
    Mohd Fairul Sharin Abdul Razak
    ;
    Ayu Wazira Azhari
    ;
    Chobpattana V.
    ;
    Kaczmarek L.
    In this study, a sol gel procedure for preparation of TiO2 thin films with graphene oxide (GO) was developed. The effect of PEG and SDS addition on the microstructure of the films as well as the photocatalytic activity of the thin film was also investigated. The morphology and surface structure of the films were studied by SEM and AFM while the photocatalytic activity of the films was analyzed by measuring the degradation of methylene blue under sunlight irradiation using UV-Vis spectrophotometer. It was found that GO/TiO2 thin film with PEG shows a smaller and porous particle while GO/TiO2 thin film with SDS formed a very smooth surface and very fine particles. Therefore, in AFM analysis reveals that surface roughness decreases with the addition of PEG and SDS. Finally, the photocatalytic activity showed that GO/TiO2 thin film with SDS have the most effective self-cleaning property which degrade 64% of methylene blue that act as model of contaminants.
      1
  • 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.
      4  1
  • Publication
    Synergistic effect of agarose biopolymer gel electrolyte with modified TiO2 for low-cost electrochemical device applications
    ( 2023-09-01)
    Badri A.
    ;
    Mohd Fairul Sharin Abdul Razak
    ;
    Nawawi W.I.
    ;
    Norhayati Sabani
    ;
    Mohd Natashah Norizan
    ;
    Abul Shukor A.
    The effect of different concentrations of agarose gel electrolyte in a low-cost fabrication of DSSC system was investigated. The modified DSSC was fabricated by a sandwiched method using ITO glass plates as substrates. TiO2-Graphene-coated glass plate was used as the working electrode while PANI-GO-coated glass plate works as a counter electrode, respectively. Both electrodes were separated by agarose gel mixture with KI solution as gel biopolymer electrolyte. The FTIR result showed that peaks of agarose are well observed in the KI-agarose spectra. In the XRD analysis, the combination of KI-agarose has reduced the crystallinity of agarose which was good for ionic conductivity value. The addition of agarose in KI solution also produced a fine channel to facilitate the ionic transfer in electrolyte. The behaviour of electrochemical properties of the system was observed using AC impedance spectroscopy based on the Nyquist plot. From the plot, three semicircles were observed as the responses at different frequencies. It was observed that the 5 wt% agarose electrolyte in DSSC system was selected as the optimum loading exhibiting the lowest resistivity ensuring the faster electron transfer and giving the ionic conductivity of 9.04 × 10−1 S/cm. The ionic conductivity of the system was dropped at 2.21 × 10−1 S/cm as the percentage of agarose was increase to 6 wt%.
      1  10