Article
Chemistry, Physical
Hui Wang, Haifeng Qi, Xiao Sun, Shuya Jia, Xiyi Li, Tina Jingyan Miao, Lunqiao Xiong, Shihao Wang, Xiaolei Zhang, Xiaoyan Liu, Aiqin Wang, Tao Zhang, Weixin Huang, Junwang Tang
Summary: A promising method for on-demand hydrogen production is demonstrated using an atomic-level catalyst design strategy that combines single atoms and nanodots. The PtCu-TiO2 sandwich photocatalyst achieves a high formation rate of H-2 with a high quantum efficiency.
Review
Chemistry, Multidisciplinary
Ethan Dern Huang Kong, Jenny Hui Foong Chau, Chin Wei Lai, Cheng Seong Khe, Gaurav Sharma, Amit Kumar, Suchart Siengchin, Mavinkere Rangappa Sanjay
Summary: Water pollution is a global issue that conventional methods struggle to solve, but photocatalysis, especially with GO/TiO2 composites, shows promising results in wastewater treatment.
Article
Environmental Sciences
Shehzad Ahmad, Muhammad Suleman Tahir, Ghulam Mustafa Kamal, Xu Zhang, Saima Nazir, Muhammad Bilal Tahir, Bin Jiang, Muhammad Safdar
Summary: Water contamination caused by industrial processes remains a major issue in the 21st century. Utilizing sunlight in photocatalysis proves to be an efficient method for wastewater purification. Composite materials consisting of TiO2/activated carbon/two-dimensional selenides outperform individual components or binary composites for this application. Through a hydrothermal technique, photocatalytic composites were synthesized and characterized using UV-Visible spectroscopy, FTIR, XRD, and SEM. The heterostructures effectively absorb UV and visible light, which is converted into reducing electrons and oxidizing species to decompose organic pollutants in industrial wastewater.
Article
Chemistry, Applied
Yu Zhang, Liang Zhang, Ruohui Gao, Lvling Zhong, Juanqin Xue
Summary: The polymer composite material PVA/BC/CaCO3 was developed for selective adsorption of toxic heavy metal ions such as Cd(II), Cu(II), and Pb(II) from solution. The adsorption kinetics data fit the pseudo-first-order kinetics model, while the thermodynamic adsorption data fit the Langmuir model. The maximum adsorption capacities for Cu(II), Pb(II), and Cd(II) were found to be 57.1, 513.6, and 238.6 mg/g, respectively, at 40 degrees C. This adsorbent also showed high recyclability, indicating its potential in removing heavy metal ions from contaminated solutions.
CARBOHYDRATE POLYMERS
(2021)
Article
Biochemistry & Molecular Biology
Jixue Zhao, Liyu Yao, Shu Nie, Yang Xu
Summary: The study demonstrated that alginate-TiO2 TMZ nanoparticles have higher cytotoxicity against neuroblastoma cells while showing less inhibitory effects on normal cells. These combined nanoparticles enhance antioxidant, anti-inflammatory, and antitumor activities, leading to prolonged survival time in the neuroblastoma model.
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
(2021)
Article
Chemistry, Analytical
Hongchuan Li, Rui Jin, Hongxiang Hu, Yusef Kianpoor Kalkhajeh, Yingying Zhao, Yue Gao, Borui Zhang
Summary: The study investigated the use of alginate composite gel for the removal of As(III), Pb(II), and Zn(II) from wastewater, showing high removal rates under optimal conditions. The adsorption kinetics process was well described by the pseudo-second-order kinetic equation, and the isothermal adsorption models differed for each metal ion. The results suggest the effective utilization of the new adsorbents for the removal of As(III), Pb(II), and Zn(II) from water.
JOURNAL OF ANALYTICAL METHODS IN CHEMISTRY
(2021)
Article
Chemistry, Multidisciplinary
Reece T. T. Lawrence, Mark P. P. Croxall, Cheng Lu, M. Cynthia Goh
Summary: A series of TiO2-NGQD composite photocatalysts were synthesized and showed increased photocurrent generation and photocatalytic degradation of phenol under full spectrum and visible only illumination. The composites could switch from anodic to cathodic photocurrent by changing the light source. The prepared composites outperformed the commercial standard P25 TiO2, with the 8 wt% NGQD composite showing a visible improvement of over 600% compared to P25. TiO2-NGQDs have significant potential in photocatalysis, energy harvesting, and water splitting.
Article
Materials Science, Multidisciplinary
Hafiza Mehwish Rasheed, Abdul Rauf, Muhammad Arif, Ayesha Mohyuddin, Muhammad Javid, Sohail Nadeem, Afifa Yousuf, Muhammad Irfan, Shah Muhammad Haroon, Hamid Raza, Sobhy M. Ibrahim, Shams Ul Mahmood
Summary: Water contamination is an increasing problem due to the versatile applications of heavy metal ions, but the selective removal of these ions from wastewater remains an issue. To address this, a ZnO-PVA-coated membrane was developed using a sol-gel process and bio-inspired Azadirachta indica (neem) extract. The membrane successfully removed Pb+2 ions from polluted water solution, with a removal efficiency of 93.99% at pH=4 and a maximum adsorption capacity of 218.47 mg/g.
Review
Engineering, Environmental
Kunal G. Thakre, Divya P. Barai, Bharat A. Bhanvase
Summary: Advancements in nanomaterials have provided new methods for wastewater treatment, particularly semiconductor materials like TiO2 and ZnO showing promising applications in photocatalytic wastewater treatment. Graphene nanocomposites are also being extensively researched for environmental remediation due to their superior properties, such as physical, optical, thermal, and electronic capabilities.
WATER ENVIRONMENT RESEARCH
(2021)
Article
Environmental Sciences
Anirban Chakraborty, Samriti, Olim Ruzimuradov, Raju Kumar Gupta, Junghyun Cho, Jai Prakash
Summary: This review focuses on the hydrothermal synthesis of three-dimensional titanium dioxide nanoflower structures (3D TiO2 NFs) and the effect of shape/size and other key synthesis parameters on their optoelectronic and photocatalytic properties. The strategies to improve their photocatalytic properties, such as doping engineering and the formation of heterojunction/nanocomposites with other functional nanomaterials, are also discussed, along with their potential applications in the photocatalytic degradation of various emerging pollutants in wastewater.
ENVIRONMENTAL RESEARCH
(2022)
Article
Engineering, Environmental
Alba Hernandez-Zanoletty, Oscar Cabezuelo, Agustin Paris-Reche, Isabel Oller, M. Inmaculada Polo-Lopez, Ana Aguera, Patricia Plaza, M. Luisa Marin, Francisco Bosca, Sixto Malato
Summary: This study evaluated the application of TiO2 photocatalysts supported on glass wool and silica material for urban wastewater treatment. The SiO2_TiO2 photocatalyst showed high and stable performance in removing pollutants in water.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2023)
Review
Chemistry, Physical
Ajit Das, Mrinal K. Adak, Nagendranath Mahata, Bhaskar Biswas
Summary: This review provides an overview of the development of TiO2-based photocatalytic systems and new functionalized photocatalysts, their kinetic studies, and the role of scavengers related to the advance and modified processes in wastewater treatment. Additionally, the treatment of real wastewater in the industrial sector and the futuristic cost-effective alternative with high catalytic capacity have been outlined.
JOURNAL OF MOLECULAR LIQUIDS
(2021)
Article
Engineering, Environmental
Nurshahnawal Yaacob, Goh Pei Sean, Noor Aina Mohd Nazri, Ahmad Fauzi Ismail, Muhammad Nidzhom Zainol Abidin, Mahesan Naidu Subramaniam
Summary: By doping ZrO2 into TiO2, ZrO2-TiO2 heterojunction photocatalysts were successfully synthesized, showing smaller crystallite size with higher surface area and mesopores volume.
JOURNAL OF WATER PROCESS ENGINEERING
(2021)
Article
Environmental Sciences
Xiao Zhang, Zhiyue Li, Taoyi Zhang, Jing Chen, Wenxi Ji, Yun Wei
Summary: A low-cost and environmental-friendly SA-ME@ZIF-67 adsorbent was fabricated by chemical grafting and in situ growth for the removal of lead ions in wastewater. The adsorbent showed high adsorption capacity, removal efficiency, and easy recyclability for Pb(II).
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2023)
Article
Materials Science, Ceramics
M. Arellano-Cortaza, E. Ramirez-Morales, S. J. Castillo, L. Lartundo-Rojas, I. Zamudio-Torres, E. M. Lopez Alejandro, L. Rojas-Blanco
Summary: ZnSe/ZnO heterostructures were synthesized using the microwave-assisted hydrothermal method with zinc acetate and zinc nitrate as the source of Zn2+ ions. The incorporation of ZnSe into the ZnO matrix resulted in changes in the size of ZnO crystallites and lattice parameters. Optical and texture analyses showed that ZnSe particles caused a decrease in gap energy and a significant increase in the specific surface area of ZnSe/ZnO heterostructures. ZnSe/ZnO heterostructures synthesized with zinc acetate exhibited better photocatalytic performance in visible light compared to pure ZnO.
CERAMICS INTERNATIONAL
(2023)
