Jul 2026· Sultan Qaboos University Journal for Science· Vol 31, pp. 87-99· 0 citations
Abstract
We synthesized Bi2WO6 via a hydrothermal approach and subsequently fabricated a Bi2WO6/g-C3N4 heterojunction through grinding process. The resulting composite demonstrated an impressive photocatalytic production rate of hydrogen peroxide at 4809.5 μ mol g-1 h-1, which is nearly double that of CN and 18 times greater than that of BWO. The photocatalytic effectiveness of the BWO/CN composite was thoroughly investigated under different conditions and environmental factors. This enhancement can be primarily attributed to the efficient separation and migration of photogenerated charge carrier pairs facilitated by the S-scheme heterojunction, along with improved redox capability. Photoluminescence spectroscopy and electrochemical impedance spectroscopy (EIS) were utilized to verify the improved efficiency of charge separation. Furthermore, based on X-ray photoelectron spectroscopy (XPS) and electron paramagnetic resonance (EPR) analyses, in conjunction with band structure calculations, the underlying mechanism of hydrogen peroxide generation and the key factors contributing to the enhanced photocatalytic performance were elucidated.
Efficient photocatalytic H2 evolution requires coordinated control of light absorption, interfacial charge transfer, and surface reduction kinetics. Here, g-C3N4/Bi4Ti3O12 (CN/BTO) heterojunctions were constructed by in-situ thermal coupling and subsequently modified through in-situ photodeposition of Pt. Among the inv...
To address common challenges in photocatalytic water splitting for hydrogen (H2) production, such as slow hole consumption kinetics and uncontrolled oxidative side reactions, we have designed an innovative Zn0.5Cd0.5S/bimetallic cobalt/nickel polyphthalocyanine (denoted as ZCS/CoNiPPc) photocatalyst that forms a Schott...
Single-component photocatalytic materials generally exhibit poor utilization of visible light and inefficient charge separation. To address these limitations, a series of g-C3N4/Bi2MoO6 heterojunction composites were fabricated via a facile stirring-assisted heating-evaporation method. Structural and spectroscopic char...
Huihui Shi, Shi-Heng Xin, Shiping Li et al.· RSC Advances· 1 citation
Photocatalytic oxygen reduction offers a sustainable, solar-driven route for the green synthesis of hydrogen peroxide (H2O2), however it suffers from limited efficiency due to rapid charge recombination and poor selectivity toward the two-electron reduction pathway. Herein, crystalline poly(heptazine) imide (PHI) and p...
Auttaphon Chachvalvutikul, Hai-Feng Qi, Ren-Jun Liu et al.· Journal of Materials Chemist...· 0 citations
Photocatalytic H2O2 production from the oxygen reduction reaction (ORR) has emerged as a sustainable and green approach to address the global energy crisis and environmental challenges. However, its practical application is still limited by sluggish reaction kinetics and fast recombination of photogenerated excitons....
Jayashree Panda, Jyotirmayee Sahu, Nagma Sultana et al.· ACS Applied Energy Materials· 0 citations
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