Publications by authors named "Jafar Shah"

Cervical cancer is a significant global health issue, ranking as the second most prevalent cancer among women of reproductive age. While prevention strategies like HPV vaccination and screening have made it highly preventable, these benefits are mostly seen in high-HDI nations. In contrast, LMICs lag behind, with Afghanistan facing a growing crisis due to war, poverty, and lack of awareness.

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This study investigated the dynamic changes in NiFe (hydr)oxide and identified the role of high-valent Fe in the oxygen-evolution reaction (OER) within alkaline media via in situ techniques. Several high-valent Fe ions were found to remain considerably stable in the absence of potential in NiFe (hydr)oxide, even 96 hours after the OER. For Ni hydroxide treated with Fe ions, where Fe sites are introduced onto the surface of Ni hydroxide, no Fe species were detected at the rate-determining step (RDS).

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Exploiting spontaneous polarization of ferroelectric materials to achieve high charge separation efficiency is an intriguing but challenging research topic in solar energy conversion. This work shows that loading high work function RuO cocatalyst on BiFeO (BFO) nanoparticles enhances the intrinsic ferroelectric polarization by efficient screening of charges to RuO via RuO /BFO heterojunction. This leads to enhancement of the surface photovoltage of RuO /BFO single nanoparticles nearly 3 times, the driving force for charge separation and transfer in photocatalytic reactions.

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Among post-lithium ion technologies, magnesium-ion batteries (MIBs) are receiving great concern in recent years. However, MIBs are mainly restrained by the lack of cathode materials, which may accommodate the fast diffusion kinetics of Mg ions. To overcome this problem, herein we attempt to synthesize a reduced graphene oxide (rGO) encapsulated tin oxide (SnO) nanoparticles composites through an electrostatic-interaction-induced-self-assembly approach at low temperature.

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Article Synopsis
  • The study involved synthesizing nitrogen-doped and nitrogen-boron double-doped manganese oxide (MnO) and tungsten oxide (WO) nanoparticles using a precipitation-hydrothermal method for degrading methylene blue dye under visible light.
  • Characterization techniques like XRD and UV-vis spectroscopy confirmed that nitrogen and boron were effectively incorporated into the crystal structures, with a reduction in crystallite size and narrowing of band gaps, which improved visible light absorption.
  • Photocatalytic tests showed high efficiency in methylene blue degradation, with the co-doped oxides performing best, and the materials maintained effectiveness after multiple uses despite inhibition from certain scavenger molecules.
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Converting sunlight to solar fuels by artificial photosynthesis is an innovative science and technology for renewable energy. Light harvesting, photogenerated charge separation and transfer (CST), and catalytic reactions are the three primary steps in the processes involved in the conversion of solar energy to chemical energy (SE-CE). Among the processes, CST is the key "energy pump and delivery" step in determining the overall solar-energy conversion efficiency.

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