Article
Multidisciplinary Sciences
Sasireka Velusamy, Anurag Roy, Ezrah Mariam, Satheesh Krishnamurthy, Senthilarasu Sundaram, Tapas K. Mallick
Summary: This study synthesized a composite of reduced graphene oxide (rGO) and zinc oxide nanorods (ZnO) called rGO@ZnO, and tested its photocatalytic performance for reducing para-nitro phenol (PNP) to para-amino phenol (PAP) under both UV and visible light irradiation. The sample rGO(5)@ZnO exhibited remarkable photocatalytic activity, achieving a PNP reduction efficiency of approximately 98% within four minutes.
SCIENTIFIC REPORTS
(2023)
Article
Engineering, Chemical
Mohammad Amin Arayesh, Ali Hossein Kianfar, Gholamhossein Mohammadnezhad
Summary: In this study, a novel magnetic photocatalyst, Fe3O4/ZrO2/ZnO nanoparticle, was successfully synthesized and demonstrated high efficiency in degrading nitrophenols and exhibiting antimicrobial activity. The nanoparticle achieved a degradation rate of 90% for para-nitrophenol under solar light irradiation and showed significant antibacterial activity against E. coli and S. aureus. Moreover, it exhibited good reusability and high antibacterial activity at low dosages.
JOURNAL OF THE TAIWAN INSTITUTE OF CHEMICAL ENGINEERS
(2023)
Article
Engineering, Environmental
Xunfu Zhou, Lanzhen Peng, Limei Xu, Jin Luo, Xiaomei Ning, Xiaoqin Zhou, Feng Peng, Xiaosong Zhou
Summary: In this study, metallosupramolecular complexes were constructed as catalysts to enhance the hydrogen evolution reaction in artificial photocatalysis. The results showed that these complexes significantly increased the photocatalytic activity and improved the utilization efficiency of noble metals.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Environmental Sciences
Vrushali Vinayak Kadam, Soundharya Dharshini Shanmugam, Jagadeeshbabu Ponnan Ettiyappan, Raj Mohan Balakrishnan
Summary: This study successfully degraded p-nitrophenol using biologically synthesized zinc oxide nanoparticles as a photocatalyst. Optimum conditions for the degradation were found to be a ZnO photocatalyst concentration of 0.1 g/L, pH 11, and H2O2 concentration of 5 mM.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2021)
Article
Materials Science, Multidisciplinary
V Deepthi, B. Vidhya, Anju Sebastian
Summary: ZnO/Ag3PO4 heterostructure-based thin films were prepared via hydrothermal and SILAR deposition processes. The samples were characterized using various techniques, including SEM, XRD, EDS, UV-Vis spectroscopy, and PL spectroscopy. The combination of Ag3PO4 and ZnO nanorods in the heterostructure displayed enhanced photocatalytic activity, recyclability, and stability compared to pure ZnO nanorods. Under visible light irradiation, the Ag3PO4-ZnO nanorod combination with a 5 times dip of Ag3PO4 showed an excellent photodegradation efficiency of MB (86%), surpassing pure ZnO nanorods (60%).
Article
Chemistry, Physical
Suryyia Manzoor, Javier Fernandez Garcia, Kausar Hussain Shah, Muhammad Imran Khan, Naseem Abbas, Hina Raza, Shamroza Mubarik, Muhamad Hayat, Alveena Iram, Ahmed Yar, Abdallah Shanableh
Summary: Water pollution can cause damage to the aquatic environment, and photocatalytic activity offers a greener and promising method for degrading organic contaminants. This research focuses on the degradation of various water pollutants using zinc/iron oxide nanoparticles as photocatalysts. The photocatalyst not only showed high efficiency in degrading pollutants, but also exhibited antibacterial activity against E. coli.
Article
Materials Science, Multidisciplinary
Sumanta Jana, Saugata Konar, Bibhas Chandra Mitra, Anup Mondal, Subrata Mukhopadhyay
Summary: By introducing a bi-metallic system (Au and Pt) and an active metal oxide layer (SnO2), the Au/Pt/SnO2 heterostructure with high efficiency photocatalytic performance can be prepared, effectively enhancing the photodegradation rate of dyes.
MATERIALS RESEARCH BULLETIN
(2021)
Article
Chemistry, Inorganic & Nuclear
Ece Tugba Saka, Kader Tekintas, Olcay Bekircan, Zekeriya Biyiklioglu
Summary: It is urgent to design an eco-friendly and low cost catalyst with high efficiency and selectivity for the rapid cleanup of phenolic compounds. In this study, we synthesized and characterized 1,3,4-thiadizaole substituted copper and cobalt phthalocyanine 4 and 5 as catalysts for 4-nitrophenol photoxidation. Through investigations on catalyst amount and solvent effect, we determined the optimal conditions for 4-NP photoxidation. At the optimal conditions, the highest product conversion (90% for complex 4 and 95% for complex 5) was achieved with a substrate/catalyst ratio of 2000/1. Dichloromethane was identified as the best solvent for both catalysts. The catalytic turnover frequencies of 4 and 5 for photoxidation of 4-NP were determined to be 900 h-1 and 950 h-1, respectively, which were better than the catalysts used in our previous works. Complex 5 maintained a conversion rate of 32% after four continuous cycles, and the catalytic and recovery process could be achieved by separating the two-phase reaction mixture.
INORGANICA CHIMICA ACTA
(2023)
Article
Chemistry, Physical
Daiki Saito, Yusuke Tamaki, Osamu Ishitani
Summary: Various hybrid systems of metal-complex photocatalysts and semiconductor materials have been developed for photocatalytic CO2 reduction using the Z-scheme mechanism. This study focused on the photocatalytic activity of RuRu/Al2O3 in CO2 reduction by varying the adsorption density of RuRu. Increasing the adsorption density of RuRu led to a decrease in the production of the main product, HCOOH, due to the formation of Ru polymers. The addition of mononuclear Ru(II)-complex photosensitizers improved the photocatalytic activity of RuRu by supplying electrons to suppress its decomposition.
Article
Materials Science, Ceramics
Reda M. Mohamed, Ibraheem A. Mkhalid, Maha Alhaddad, Amal Basaleh, Khalid A. Alzahrani, Adel A. Ismail
Summary: The design and fabrication of Pt nanoparticle-decorated mesoporous ZnO-ZnS heterostructures were described and used effectively for photocatalytic CO2 conversion to yield CH3OH. The significantly enhanced reduction of CO2 was attributed to the synergistic effects of the ZnO-ZnS heterostructure and the incorporation of Pt NPs. The synthesized photocatalyst provides a new transfer route through which carriers can migrate to the outer surface as well as pore channels of the mesoporous ZnO-ZnS, thereby significantly minimizing the transfer distance for carriers and inhibiting photoinduced electron-hole recombination.
CERAMICS INTERNATIONAL
(2021)
Article
Engineering, Chemical
Chun Wang, Yao Zhang, Hui Liu, Mingxing Wu, Rufen Chen
Summary: Z-scheme Si-Fe2O3/Ti3C2/CdS composites prepared by hydrothermal processes showed significantly improved photocatalytic performance for p-Nitrophenol degradation under visible-light illumination. The SFTC-2 ternary composite obtained had the highest photocatalytic activity. Ti3C2 acted as a charge transport bridge, enhancing the separation efficiency of photogenerated carriers and redox ability of the catalysts in the Si-Fe2O3/Ti3C2/CdS Z-scheme heterojunction. The synergistic effects of the Z-scheme heterojunction and photo-Fenton promoted the production of active species, thereby enhancing visible-light photocatalytic performance. Based on the experimental results, a possible photocatalytic mechanism was proposed.
SEPARATION AND PURIFICATION TECHNOLOGY
(2023)
Article
Chemistry, Inorganic & Nuclear
Wenjing Chen, Huafeng Li, Yuzhen Jin, Wenjing Lei, Qingyun Bai, Pengtao Ma, Jingping Wang, Jingyang Niu
Summary: Converting solar energy into storable hydrogen energy using green photocatalytic technology is a reliable solution for the energy crisis. Polyoxometalates, with their unique electronic and structural properties, are promising photocatalysts for hydrogen production. Introducing noble metals greatly enhances their photocatalytic efficiency.
INORGANIC CHEMISTRY
(2023)
Article
Environmental Sciences
Xueyu Wei, Saraschandra Naraginti, Xiaofan Yang, Xiaoping Xu, Jiyuan Li, Junwei Sun, Zhigang Liu, Jiang Pei
Summary: A novel AgVO3/rGO/CuFe2O4 heterojunction was prepared and showed superior photocatalytic activity for hydrogen evolution and pollutant degradation. The composite exhibited higher hydrogen generation rate and better degradation efficiency compared to pure AgVO3 and CuFe2O4. It also demonstrated good magnetism and stability, making it easily separated and recyclable.
ENVIRONMENTAL RESEARCH
(2023)
Article
Chemistry, Multidisciplinary
Abdessalem Hamrouni, Marwa Moussa, Nidhal Fessi, Leonardo Palmisano, Riccardo Ceccato, Ali Rayes, Francesco Parrino
Summary: The effects of Barium doping on the structural, morphological, and optoelectronic properties, as well as on the physico-chemical features of the surface were investigated and correlated with the observed photocatalytic activity under natural solar irradiation. The incorporation of Ba2+ ions into the ZnO structure increased the surface area and enhanced the hydrophilicity. Ba doping suppressed photocorrosion and increased the stability of the BZO sample under irradiation, making it a promising photocatalyst for the abatement of toxic species.
Article
Chemistry, Applied
Yasutomo Goto, Shinji Inagaki
Summary: In this study, the structural changes of BPy-PMO and Pt-BPy-PMO caused by thermal treatment were investigated, and nitrogen-doped porous carbon/silica composites with high nitrogen/carbon ratios and large pore diameters were successfully prepared. The pyrolyzed BPy-PMO contained abundant graphitic nitrogen and carbon species, along with a few oxygenated species. Moreover, Pt complexes on the pore surface of BPy-PMO transformed into Pt oxide nanoparticles and a small amount of Pt metal after heating.
MICROPOROUS AND MESOPOROUS MATERIALS
(2023)
