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Fabrication and characterization of metal oxide and lignocelluloses fibers based working electrode for dye-sensitized solar cells (DSSCs)
摘要： This study presents the fabrication of flexible composite sheets of titanium dioxide (TiO2) by incorporation of natural lignocelluloses fibers extracted from the self-growing plant, Typha Angustifolia to address the inherent rigid structure and superior absorption properties of the working electrode. Furthermore, fabricated TiO2 based composites were characterized by scanning electron microscope (SEM), Fourier transforms infrared (FTIR), ultraviolet-visible (UV-VIS) spectroscopy and employed as a working electrode for DSSC after deposition on fluorine doped tin oxide (FTO) glass substrate. SEM morphology reveals that LC fibers acted as a thread to bind the TiO2 nanoparticles and also with better voids for adsorption of electrolyte whereas FTIR spectroscopy confirms the successful formation of the paper composite. J-V measurements reveal the high efficiency of 2.95% for TiO2/LC flexible and environmentally safe composite which can be feasible for modern bendable DSSC.
关键词： Working Electrode,TiO2,Dye-Sensitized Solar Cell,lignocelluloses fibers
更新于2025-09-23 15:19:57
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Fabrication & Characterization of Simple Structure Self-Assembled Graphene Oxide Based Heavy Metal Ion Sensor
摘要： The simple structure and high robustness of heavy metal sensors were developed by implementing a GO/Au/FR4 Substrate configuration. In this study, the sensing characteristics of an in-house fabricated heavy-metal-ion sensor (HMS) with graphene oxide (GO) as the sensing element was presented. The HMS employed a three electrodes configuration architecture, while GO of various concentrations ranging from 0.1 to 1 mg/ml would serve as the sensing medium. The surface of the working electrode was decorated with GO through drop-casting technique. Several types of heavy metal ions such as lead (Pb), mercury (Hg), and cadmium (Cd) were used in this study. The concentration of each was prepared according to the maximum exposure limit imposed by the World Health Organization, with Pb (10 ppm), Hg (1 ppm), and Cd (5 ppm). The sensing performance was found to be proportionate to GO concentration when the sensor was exposed to 10 ppm of Pb. On selectivity test using 1 mg/ml of GO, the sensor exhibited superior sensitivity towards 10 ppm of Pb, ～ 1666.6%; followed by 5 ppm of Cd, ～ 512.8%, while 1 ppm of Hg being the least detected, ～ 10.5%. This signified GO shows greater affinity towards Pb ions detection in comparison to others.
关键词： graphene oxide,sensors and working electrode,Electrochemical,IDE,heavy metal ions
更新于2025-09-12 10:27:22