International Journal of Biomass Utilization and Sustainable Energy (IJBUSE)

Permanent URI for this collection

https://hdl.handle.net/20.500.14170/1581
The International Journal of Biomass Utilization and Sustainable Energy (IJBUSE) aim is to engage and disseminate knowledge in all the related areas of utilization of biomass, waste to wealth conversion, bioenergy, biotransformations and bioresource systems analysis, and technologies associated with conversion or production. For Bioenergy Processes, fermentations, thermochemical conversions, liquid and gaseous fuels, and petrochemical substitutes are also discussed. Types of papers published are: Full-length original research papers; Short communications; Review articles; Letters to the Editor.

Journal homepage

Copyrights And Limitations On Use

Browse

Browsing International Journal of Biomass Utilization and Sustainable Energy (IJBUSE) by Author "Abas Z.A."
  • Publication
    Electrical Performance of Curcuma longa Extract Dye using SnO2-Based Photoanode Dye-Sensitized Solar Cell
    ( 2022-12-01)
    Idris S.N.
    ;
    Mohamad I.S.
    ;
    Mahmed N.
    ;
    Norizan M.N.
    ;
    Magiswaran K.
    ;
    Abas Z.A.
    Due to their low output costs, straightforward manufacturing, and high effectiveness, dye-sensitized solar cell (DSSC) has a large following interest in the solar energy industry. Furthermore, due to its outstanding properties, tin oxide (SnO2) is an appealing semiconducting material suitable as a photoanode in DSSCs. In this research, the photoelectrodes of DSSC were fabricated using commercial SnO2 nanoparticles and sensitized with inorganic and organic dyes, N719 and Curcuma longa (turmeric) extract dye. On top of that, a platinum (Pt) counter electrode, iodide electrolyte and fluorine-doped tin oxide (FTO) coated glass substrate were used to fabricate the DSSC. The crystallographic structure and surface morphology of the SnO2 nanopowder were identified using X-ray diffraction (XRD) and scanning electron microscopy (SEM) characterizations respectively. In addition, UV-Visible and current density-voltage curves were used to analyze the optical properties of the photoanodes and the cell’s electrical performance. As a result, it was found that the DSSC fabricated with N719 dye exhibited higher efficiency in contrast with the turmeric extract dye with SnO2 photoanodes.
  • Publication
    Modeling Physical Interaction and Understanding Peer Group Learning Dynamics: Graph Analytics Approach Perspective
    ( 2022-05-01)
    Abas Z.A.
    ;
    Norizan M.N.
    ;
    Abidin Z.Z.
    ;
    Rahman A.F.N.A.
    ;
    Rahmalan H.
    ;
    Tharbe I.H.A.
    ;
    Fakhruddin W.F.W.W.
    ;
    Zaki N.H.M.
    ;
    Sobri S.A.
    Physical interaction in peer learning has been proven to improve students’ learning pro-cesses, which is pertinent in facilitating a fulfilling learning experience in learning theory. However, observation and interviews are often used to investigate peer group learning dynamics from a qualitative perspective. Hence, more data-driven analysis needs to be performed to investigate the physical interaction in peer learning. This paper complements existing works by proposing a framework for exploring students’ physical interaction in peer learning based on the graph analytics modeling approach focusing on both centrality and community detection, as well as visualization of the graph model for more than 50 students taking part in group discussions. The experiment was conducted during a mathematics tutorial class. The physical interactions among students were captured through an online Google form and represented in a graph model. Once the model and graph visualization were developed, findings from centrality analysis and community detection were conducted to identify peer leaders who can facilitate and teach their peers. Based on the results, it was found that five groups were formed during the physical interaction throughout the peer learning process, with at least one student showing the potential to become a peer leader in each group. This paper also highlights the potential of the graph analytics approach to explore peer learning group dynamics and interaction patterns among students to maximize their teaching and learning experience.
  • Publication
    The Effect of Spinacia oleracea Dye Absorption Time on ZnO-based Dye-Sensitized Solar Cells’ Electrical Performance
    ( 2022-12-01)
    Magiswaran K.
    ;
    Mohamad I.S.
    ;
    Mahmed N.
    ;
    Norizan M.N.
    ;
    Idris S.N.
    ;
    Abas Z.A.
    Dye-sensitized solar cells (DSSC) have attracted much attention over the past 20 years due to their significance in energy conversion. However, the dye soaking time may significantly impact the efficacy of the photoanode semiconductor to carry the electronic charge to which the dye molecules adhere. An optimized dye soaking time may prevent the recombination of photo-excited electrons that are injected into the semiconductor of the DSSC. This study scrutinized the dependence of the zinc oxide (ZnO) photoanode soaking time of Spinacia oleracea (spinach) dye on the photocurrent-voltage characteristics. The ZnO film layer (photoanode) was prepared with commercial ZnO nanopowder and applied onto a fluorine-doped tin oxide (FTO) glass substrate using the doctor blade method. The prepared DSSCs’ were subjected to a variety of characterizations, including current density-voltage (J-V) characterization, UV-visible characterization, scanning electron microscope (SEM), and X-ray diffraction (XRD). Comparing four variations of dye soaking time, ZnO-based DSSC photoanode soaked in the dye for an hour achieved an optimum efficiency of 0.03 %. This study proved that the efficiency of a DSSC can be improved by optimizing the dye soaking time.