Article
Acoustics
Elham Abkar, Abbas Al-Nayili, Omid Amiri, Mojgan Ghanbari, Masoud Salavati-Niasari
Summary: In this study, a novel Cs2HgI4 nano photocatalyst was prepared and characterized for its potential in water grade and industrial sewage treatment. The bandgap of the Cs2HgI4 nanostructures was determined to be approximately 2.3 eV, making them suitable for photocatalytic applications. Photocatalytic data revealed that Cs2HgI4 could effectively degrade acidic coloring agents, with methyl orange showing the highest photodegradation rate of 76.8%.
ULTRASONICS SONOCHEMISTRY
(2021)
Article
Engineering, Chemical
Beiya An, Guofei Jiang, Jialiang Liu, Fei Gao, Fang Liu, Qiang Chen, Ruiyu Zhao
Summary: In this study, a Cl-doped g-C3N4 nanotube composite Ti3C2 (Cl-TCN@TC) photocatalyst was prepared for the first time, which has significant advantages in decarbonization and denitrification of wastewater. The Cl-TCN@TC-2 showed excellent removal effects on tetracycline (TC, 91.08%) and p-nitrophenol (p-NP, 70.92%). The kinetic constants for the degradation of TC and p-NP by Cl-TCN@TC-2 were significantly higher than those of CN. The COD removal rates of domestic sewage and oilfield produced water by Cl-TCN@TC-2 reached 54.2% and 64.8%, respectively. After the addition of HCOOH, the denitrification rate of Cl-TCN@TC-2 reached 50.24%, which was 12.62 times higher than that of CN, with a N2 selectivity of 92.46%.
SEPARATION AND PURIFICATION TECHNOLOGY
(2023)
Article
Chemistry, Analytical
Khurshaid Ahmad Malik, Javied Hamid Malik, Insaaf Assadullah, Radha Tomar
Summary: This article reports the synthesis of zinc oxide (ZnO) nanostructures using an ultrasonication technique at room temperature, and investigates their photoluminescent and photocatalytic behavior. The synthesized nanomaterial exhibits strong ultraviolet (UV) light emission and red emission, making it suitable for photoluminescent materials. A UV/ZnO/O-2/H2O2 system was developed for the photodegradation of organic pollutants in an aqueous system. The synthesized ZnO nanostructures achieved more than 90% photodegradation of phenol red (PR) dye under UV light irradiation, demonstrating their potential for water purification applications. Characterization of the synthesized ZnO nanostructures was conducted using various techniques to investigate their structural, optical, morphological, and compositional properties.
Article
Engineering, Environmental
Jayaraman Theerthagiri, Seung Jun Lee, K. Karuppasamy, Subramanian Arulmani, S. Veeralakshmi, Muthupandian Ashokkumar, Myong Yong Choi
Summary: Significant industrial advancements have led to the release of toxic pollutants into the environment, necessitating efficient wastewater treatment processes to reduce contamination. Photocatalytic degradation is considered effective, but has limitations. Combining sonolysis with photocatalysis shows benefits for environmental remediation by utilizing more active radicals to degrade organic pollutants.
JOURNAL OF HAZARDOUS MATERIALS
(2021)
Review
Environmental Sciences
Julong Sun, Changbo Jiang, Zhiyuan Wu, Yizhuang Liu, Shiquan Sun
Summary: This paper reviews the construction of BiOBr-based nanocomposites, the mechanism of photocatalytic activity enhancement, and the research status and application prospects in the degradation of organic pollutants.
Review
Environmental Sciences
Ling Yao, Hui Yang, Zhongshan Chen, Muqing Qiu, Baowei Hu, Xiangxue Wang
Summary: Different forms of organic compounds are toxic and harmful, leading to issues like eutrophication and odorous water. Photocatalysis is seen as a promising technology to degrade these pollutants into non-toxic inorganic materials under visible light. Bismuth oxychloride (BiOCl) is a potential photocatalyst, but its wide band gap limits its performance. Various methods to enhance its photocatalytic activity have been reviewed, along with the application and future prospects of BiOCl in pollution management.
Article
Chemistry, Multidisciplinary
Liquan Wang, Ruyi Li, Yimin Zhang, Yuexiang Gao, Xian Xiao, Zhiwei Zhang, Ting Chen, Yuan Zhao
Summary: In this study, oxygen-doped carbon nitride (O-C3N4) was prepared and used to activate peroxymonosulfate (PMS) for tetracycline (TC) degradation. The oxygen atom replaced the nitrogen atom in the triazine structure, improving the catalyst's specific surface area, pore structure, and electron transport capacity. The 0.4 O-C3N4/PMS system showed the best physicochemical properties and higher TC removal rate compared to the unmodified C3N4/PMS system. The O-C3N4/PMS system exhibited free radical and non-radical pathways for TC degradation, with singlet oxygen (O-1(2)) identified as the main active species.
Review
Environmental Sciences
A. Annam Renita, S. Sathish, P. Senthil Kumar, D. Prabu, N. Manikandan, A. Mohamed Iqbal, G. Rajesh, Gayathri Rangasamy
Summary: In recent times, a wide range of toxic organic contaminants have been released into natural water resources, making the removal of these pollutants before they are discharged into water bodies crucial. Various techniques have been employed for removing these pollutants, and advanced oxidation photocatalytic methods using zinc oxide (ZnO) nanoparticles have been commonly utilized as an effective catalyst for contaminated water treatment. However, the wide energy gap of ZnO, which can only be activated under ultraviolet (UV) light, and the high recombination of electron-hole pairs limit its photocatalytic performance.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2023)
Article
Chemistry, Physical
Sufei Wang, Yang Li, Qing Liu, Jingyi Wang, Yujie Zhao, Yawen Cai, Hua Li, Zhongshan Chen
Summary: With the development of industry and agriculture, large amounts of pollutants are released to the natural environment, posing a threat to human health. This review summarizes recent studies on the degradation of organic pollutants and the reduction of metal radionuclides/ions through catalytic processes. Various catalytic techniques for the elimination of environmental pollutants are discussed, with a focus on the role of free active radicals. The relationship between pollutant properties, catalyst structures, and environmental conditions is also explored.
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
(2023)
Article
Green & Sustainable Science & Technology
Jyoti Saroha, Ekta Rani, Meenakshi Devi, Prathap Pathi, Mahesh Kumar, Shailesh Narain Sharma
Summary: Wastewater from textile industries containing organic pollutants is a global concern, and semiconductor nanocomposites have been explored for treatment. In this study, Au/Ag-TiO2 nanocomposites were synthesized and exhibited enhanced photocatalytic activity for the degradation of organic dyes in wastewater. The enhanced activity was attributed to the broad range absorption of visible light and effective charge transfer in the Au-TiO2 nanocomposites. The research provides insights into the physics underlying the enhanced photocatalytic performance of Au-TiO2 nanocomposites for organic pollutant removal.
MATERIALS TODAY SUSTAINABILITY
(2023)
Article
Chemistry, Multidisciplinary
Dominika Bury, Michal Jakubczak, Muhammad Abiyyu Kenichi Purbayanto, Milosz Rybak, Magdalena Birowska, Anna Wojcik, Dorota Moszczynska, Karamullah Eisawi, Kaitlyn Prenger, Volker Presser, Michael Naguib, Agnieszka Maria Jastrzebska
Summary: MBenes, post-MXene materials with boron composition, were successfully obtained via wet-chemical etching and delamination. The best-delaminated 48-MBene exhibited Mo2B2 orthorhombic lattice arrangement and demonstrated excellent photocatalytic activity in decomposing organic contaminants. Compared to MXene, MBene showed two-to-three times faster kinetics in dye decomposition under visible light irradiation. These findings open new possibilities for utilizing MBenes in environmental remediation.
ADVANCED FUNCTIONAL MATERIALS
(2023)
Article
Materials Science, Multidisciplinary
Aadil Bathla, Sherif A. Younis, Bonamali Pal, Ki-Hyun Kim
Summary: This review discusses the basic principle of BDS-based photocatalysis and focuses on the impact of bimetallic nanostructure doped MOFs (BDM). The photocatalytic performance of BDM for various target species is evaluated, different synthesis approaches are discussed, and new challenges and future research prospects are highlighted to advance BDM-based photocatalytic systems.
APPLIED MATERIALS TODAY
(2021)
Review
Environmental Sciences
Xiaolu Liu, Ran Ma, Li Zhuang, Baowei Hu, Jianrong Chen, Xiaoyan Liu, Xiangke Wang
Summary: Graphitic carbon nitride (g-C3N4) has high thermal stability and a moderate band gap, but its performance is limited by issues like insufficient absorption of visible light. Element doping is an effective strategy to enhance its photocatalytic properties and improve performance.
CRITICAL REVIEWS IN ENVIRONMENTAL SCIENCE AND TECHNOLOGY
(2021)
Article
Engineering, Electrical & Electronic
Keshavulu Masula, P. Sreedhar, P. Vijay Kumar, Yadagiri Bhongiri, Someshwar Pola, Manohar Basude
Summary: This study reports the synthesis and characterization of pristine NiO, Bi2O3, and composite NiO-Bi2O3 (NBO) nano material systems with modified surface morphology. The NBO and pure oxide materials were thoroughly characterized using various spectroscopic methods. The formation of a new phase of Bi2O3 was observed after incorporating Ni on its surface, and the presence of both Ni2+ and Bi3+ in the nanoparticles was confirmed. Photodegradation experiments showed a significant decrease in bandgap and high degradation efficiency of dyes and agricultural soil pollutants using NBO as a catalyst.
MATERIALS SCIENCE IN SEMICONDUCTOR PROCESSING
(2023)
Article
Chemistry, Physical
Junxian Qin, Yun Pei, Yue Zheng, Daiqi Ye, Yun Hu
Summary: Fe-MOF derivative (M-300) was prepared by thermal treatment using MIL-100(Fe) as a precursor. M-300 catalyst showed excellent performance in the degradation of volatile organic compounds (VOCs) and bacteriostasis to Escherichia coli under visible light. The catalyst also exhibited the capacity of acetaldehyde degradation under actual sunlight. The high activity of M-300 is attributed to the abundant exposure of the unsaturated Fe2+ active site, promoting electron transfer and oxygen reduction process, thereby improving the efficiency of the photocatalytic oxidation reaction. This study demonstrates the potential application of MOFs derivatives in indoor photocatalytic purification and provides a new insight into catalyst modification for photocatalytic degradation of pollutants.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2023)