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
Main Affiliation
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.
      2  29
  • 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%.
      2  20
  • 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.
      1
  • 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.
      1
  • 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.
      1