Article
Environmental Sciences
Asma Shubair, Hilal Al-Salih, Rana Sabouni, Hassan Gomaa, Sara Hassanin, Soha Salem, Talah Zeno, Bassam El Taher, Awais Zaka
Summary: Photocatalytic demulsification was effective in separating oil-water emulsions, with TiO2 nanoparticles showing better demulsification results. Dynamic light scattering and microscope imaging were used to determine the change in emulsion droplets size.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2021)
Review
Environmental Sciences
Nidhi Puri, Anjali Gupta
Summary: Various pesticides and organic compounds generated as a result of rapid industrialization and pharmaceutical companies pose a major threat to the environment. Novel photocatalysts based on zinc oxide and titanium oxide exhibit great potential towards absorption of these organic pollutants from wastewater. However, several limitations like poor affinity, particle agglomeration, high band gap, and recovery issues need to be addressed to enhance their efficiency and make them cost effective and sustainable.
ENVIRONMENTAL RESEARCH
(2023)
Article
Forestry
Vicente A. A. Hernandez, Romina Romero, Nicole Sagredo, David Contreras, Philip D. D. Evans
Summary: In this study, TiO2 and ZnO nanoparticles of different sizes and crystallographic configuration were used to protect wood surfaces from UV radiation. The size and photoactivity of the nanoparticles were measured, and the effects on wood surfaces were evaluated after UV irradiation. The results showed that nanoparticles with lower photoactivity were more effective in reducing the impact of UV radiation on wood surfaces, and smaller nanoparticles were more effective in reducing photochemical reactions.
Article
Chemistry, Physical
Fangyuan Zheng, Joana M. Queiros, Pedro M. Martins, Roberto Fernandez de Luis, Arkaitz Fidalgo-Marijuan, Jose L. Vilas-Vilela, Senentxu Lanceros-Mendez, Javier Reguera
Summary: A large number of emerging contaminants, such as pharmaceuticals, are difficult to remove from water bodies using conventional treatment methods, leading to serious environmental issues. Semiconductor-based photocatalysis has emerged as an exciting solution for the degradation of these pollutants. However, the diverse chemical composition of pharmaceutical pollutants poses challenges in selecting suitable photocatalysts for efficient and broad removal, necessitating systematic studies on the physicochemical properties of photocatalysts and pollutants.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2023)
Article
Chemistry, Inorganic & Nuclear
Shuai Ren, Jiejing Zhang, Huiqing Lu, Shiyong Gao, Lin Li, Ping Rong, Xiaolei Zhang, Yi Liu, Dandan Sang
Summary: CuO/TiO2 heterostructures with carambola-like CuO integrated with TiO2 nanotubes have been synthesized, showing strong UV light and visible light absorption. Studies indicate that these heterostructures exhibit enhanced photocatalytic activity compared to TiO2 nanotubes.
EUROPEAN JOURNAL OF INORGANIC CHEMISTRY
(2021)
Article
Engineering, Environmental
Michal Baudys, Rachel Andrews, Ri Han, Christopher O'Rourke, Stephanie Hodgen, Josef Krysa, Andrew Mills
Summary: Three commercial exterior photocatalytic paints and one In-house paint were tested using NO ISO method, showing little or no photocatalytic activity without weathering. Different paints require different weathering conditions for activation, with the STO paint showing fast and durable activation through condensation-only weathering. The presence of surface HNO3 affects the NOx removal activity of all paints towards the end of the irradiation period.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2021)
Article
Chemistry, Physical
Evangelia Vasilaki, Nikos Katsarakis, Spyros Dokianakis, Maria Vamvakaki
Summary: Core-shell heterostructures with a flower-like morphology, consisting of a ZnO core and a TiO2 shell decorated with reduced graphene oxide (rGO) sheets, were reported to enhance absorption properties towards visible light range in semiconductors. The photocatalytic performance of the rGO-modified ZnO-TiO2 catalyst under visible light irradiation outperformed that of the parent ZnO-TiO2 core-shell structures, attributed to higher absorption and improved electron-hole separation in the ternary system.
Article
Chemistry, Physical
Alejandra Romero-Moran, Jose L. Sanchez-Salas, Joel Molina-Reyes
Summary: The study established the influence of the crystalline phase and agglomeration degree of TiO2 nanoparticles on photocatalytic hydroxyl radical formation and bacterial inactivation in TiO2/SiO2 composite coatings. A relationship between hydroxyl radicals' formation and charge carrier transfer mechanism between defect levels in SiO2 and TiO2 embedded nanoparticles was established through a simple spectroscopic method. This correlation complements the lack of mechanisms behind the photocatalytic activity in TiO2/SiO2 composites.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2021)
Article
Chemistry, Multidisciplinary
Dana A. Kader
Summary: In recent years, the combination of metal oxide nanoparticles and organic dyes has attracted the interest of many researchers because of their wide range of applications under visible light. This study successfully fabricated cyanidin-sensitized silver-doped zinc oxide nanoparticles using an environmentally friendly method. The resulting ternary composite was thoroughly characterized and demonstrated promising photocatalytic activity under blue LED light.
Article
Chemistry, Multidisciplinary
Riccardo Catalano, Danielle L. Slomberg, Celine Picard, Nicolas Hucher, Vladimir Vidal, Francois Saint-Antonin, Jean-Claude Hubaud, Jerome Rose, Jerome Labille
Summary: The study examined the application of ENMs in cosmetics and their associated risks to humans and the environment. A new methodology based on two-dimensional X-ray absorption imaging was introduced to address the dispersion state of ENMs in products. 2D-XRA proved effective in analyzing UV filter dispersion and product homogeneity, while Cryo-STEM allowed for more precise observation of ENM primary particles and phase distinctions.
ENVIRONMENTAL SCIENCE-NANO
(2021)
Article
Materials Science, Multidisciplinary
Wu-Jhang Chen, Kuo-Chin Hsu, Te-Hua Fang, Tao-Hsing Chen, Ming-Hao Li
Summary: In this study, Ag or Al-doped TiO2/ZnO heterostructure nanocatalysts were prepared and their performance was evaluated for photocatalysis by degrading methylene blue. The results showed that Ag-doped TiO2/ZnO heterostructure nanocatalysts exhibited higher photocatalytic activity compared to pure TiO2, with a degradation efficiency 14% higher.
CURRENT APPLIED PHYSICS
(2022)
Article
Chemistry, Applied
Ri Han, Rachel Andrews, Christopher O'Rourke, Stephanie Hodgen, Andrew Mills
Summary: The study examined the impact of photocatalytically generated surface HNO3 on NOx and VOC removal activity using different photocatalytic films, showing varied performance. The STO paint and P25 films exhibited decreased activity after irradiation, while the IKEA fabric retained its activity due to its fibrous nature. The presence of a HNO3 film had a negative effect on NOx removal activity, but did not significantly affect the oxidation activity of acetaldehyde.
Article
Chemistry, Physical
Beibei Yang, Zixu Ma, Qian Wang, Junjiao Yang
Summary: In this study, TiO2/ZnO/diatomite composites with low recombination rate and strong UV-visible absorption properties were successfully prepared. The composite catalyst showed good photocatalytic degradation ability for both liquid pollutants and harmful volatile gases, and also exhibited good photoresponsivity and electrolytic efficiency in the hydrogen and oxygen evolution reactions.
Article
Chemistry, Physical
Tamas Gyulavari, Viktoria Marta, Zoltan Kovacs, Klara Magyari, Zsolt Kasa, Gabor Vereb, Zsolt Pap, Klara Hernadi
Summary: In this study, titanium dioxide and zinc oxide hollow spheres were synthesized using carbon spheres as templates and then immobilized on ceramic paper support. After immobilization, the photocatalytic activity order of hollow TiO2 and hollow ZnO was reversed, and the formation of a heterojunction was deduced to be responsible for the observed photocatalytic activity. The results also showed that the immobilized catalysts were highly reusable.
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
(2022)
Article
Chemistry, Analytical
Zhijia Liao, Yao Yu, Zhenyu Yuan, Fanli Meng
Summary: The ZnO-TiO2-rGO nanocomposites synthesized in this paper show excellent gas-sensing performance to butanone vapor, with a lower operating temperature, higher selectivity, and faster response speed. The detection limit to butanone is also significantly lower compared to other organic gases.
Article
Chemistry, Physical
Chien-Te Hsieh, Siyong Gu, Yasser Ashraf Gandomi, Chun-Chieh Fu, Po-Yu Sung, Ruey-Shin Juang, Cheng-Cheung Chen
Summary: This study aims to design and synthesize antiviral nanomaterials to inhibit the development of the coronavirus through interaction with the virus. The materials prepared in this study demonstrated superior performance in virus inhibition, as shown through unique preparation techniques and biocompatibility testing. Additionally, the addition of specific substances enhanced the adsorption and inhibition of the materials on the virus surface.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2023)
Editorial Material
Environmental Sciences
Hai Nguyen Tran, Jean-Claude Bollinger, Eder C. Lima, Ruey-Shin Juang
Summary: Two flaws in concepts related to the Radke-Prausnitz model and the Langmuir constant unit were identified and corrected in the paper. The nonlinear form of the Radke-Prausnitz model and the misconception about the unit of the Langmuir constant were thoroughly discussed to avoid unexpected mistakes in adsorption studies.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2023)
Article
Engineering, Chemical
Mai Lien Tran, Thi Tuong Van Tran, Ruey-Shin Juang, Chi Hieu Nguyen
Summary: In this study, chitosan (CS) and graphene oxide (GO) were combined to synthesize CS/GO composites with different GO contents. The combination of CS and GO not only improved the surface area by reducing agglomeration of GO sheets, but also significantly enhanced the adsorption capacity of cationic dye on CS. The Langmuir adsorption capacity of methylene blue (MB) reached 259.5 mg/g at pH 8 and 30 degrees C for the CS/GO12 material. The composite showed good adsorption-regeneration performance.
JOURNAL OF THE TAIWAN INSTITUTE OF CHEMICAL ENGINEERS
(2023)
Article
Green & Sustainable Science & Technology
Cheng-Wei Lin, Hai Nguyen Tran, Ruey-Shin Juang
Summary: This study investigated the techno-economic analysis for wastewater reclamation in a midstream petrochemical factory in Taiwan. Caprolactam is the main product of this factory. Different treatment methods involving membrane-based processes were proposed to reclaim and recycle wastewater for cooling water replenishment. The economic analysis showed that the combination of ultrafiltration and reverse osmosis (Scheme 3) was the best choice.
ENVIRONMENT DEVELOPMENT AND SUSTAINABILITY
(2023)
Article
Nanoscience & Nanotechnology
Yu-Sheng Hsiao, Edgar Daniel Quinones, Shih-Chieh Yen, Jiashing Yu, Ji-Tseng Fang, Peilin Chen, Ruey-Shin Juang
Summary: Electric cell-substrate impedance sensing (ECIS) is an innovative approach for the label-free and real-time detection of cell morphology, growth, and apoptosis. In this study, poly(3,4-ethylenedioxythiophene)-poly-(styrenesulfonate) (PEDOT:PSS) conducting polymer (CP)-based bioelectrodes were developed for the simultaneous drug release and real-time biosensing of cancer cell viability. This device can reliably monitor impedance signal changes correlated with cell viability while exhibiting excellent properties for both drug encapsulation and on-demand release.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Chemistry, Physical
Ruey-Shin Juang, Chien-Te Hsieh, Chia-Min Liu, Ting-An Lin, Yasser Ashraf Gandomi
Summary: We developed an electrochemical biosensor using reduced graphene oxide (rGO) incorporated onto a conductive polymer poly(3,4-ethoxylenedioxythiophene) (PEDOT) and decorated with molybdenum di-sulfide (MoS2) nanoparticles for the detection of parathyroid hormone (PTH). The sensitivity of the sensors was 0.0011 (mu A center dot mL)/pg with a detection limit of 1.457 pg/mL. The sensors also showed high selectivity towards PTH with the existence of interfering substances diluted to different concentrations.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2023)
Review
Engineering, Environmental
Hai Nguyen Tran, Jean-Claude Bollinger, Stefano Salvestrini, Khim Hoong Chu, Ruey-Shin Juang
Summary: The Radke-Prausnitz model, a three-parameter model belonging to the Langmuir-Freundlich-type equation, is analyzed in this study to promote its proper application in adsorption research. The correct expression, citation, and units of its parameters are provided. The model has important implications for understanding adsorption processes.
JOURNAL OF ENVIRONMENTAL ENGINEERING
(2023)
Article
Engineering, Chemical
Chi Hieu Nguyen, Thi Tuong Van Tran, Mai Lien Tran, Ruey-Shin Juang
Summary: Ag-doped TiO2 nanomaterials were prepared using a one-step sol-gel technique. The combination of Ag with TiO2 enhanced the lifetime of photogenerated electron-hole pairs and widened the photocatalytic activity in the visible light region, leading to improved photocatalytic activity.
JOURNAL OF THE TAIWAN INSTITUTE OF CHEMICAL ENGINEERS
(2023)
Article
Biochemistry & Molecular Biology
Mai Lien Tran, Chi Hieu Nguyen, Kuan-Yan Chu, Ruey-Shin Juang
Summary: This study experimentally confirmed the absorption of carbon dioxide (CO2) from CO2-N2 gas mixtures using water and monoethanolamine (MEA) solution in polypropylene (PP) hollow-fiber membrane contactors. Gas flow occurred inside the module while the absorbent liquid flowed counter-currently outside the shell. Various gas- and liquid-phase velocities as well as MEA concentrations were tested, and the effect of pressure difference between the gas and liquid phases on CO2 absorption was investigated. A simplified mass balance model incorporating the non-wetting mode and overall mass-transfer coefficient was proposed to predict the effective length of the fiber for CO2 absorption. The model also emphasized the significance of membrane wetting when using high concentrations of MEA in the chemical absorption process.
Article
Nanoscience & Nanotechnology
Ndumiso Vukile Mdlovu, Ruey-Shin Juang, Meng-Tzu Weng, You-Sheng Lin, Kuen-Song Lin
Summary: In this study, magnetic nanospheres loaded with doxorubicin were synthesized and evaluated for their therapeutic effects in mice. The results showed that these nanospheres exhibited significant growth inhibition of tumors, indicating their potential for cancer drug delivery.
ACS APPLIED NANO MATERIALS
(2023)
Article
Chemistry, Physical
Ruey-Shin Juang, Chien -Te Hsieh, Ting -An Lin, Yu -Chia Shao, Yasser Ashraf Gandomi
Summary: In this study, an efficient electrochemical sensor using SPCE modified by rGO-PDDA composites was developed for the detection of acetaminophen with high sensitivity and excellent selectivity. The sensor exhibited a wide concentration range, an ultralow detection limit, and successfully detected acetaminophen in human urine samples.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2023)
Article
Chemistry, Multidisciplinary
Jaysiva Ganesamurthi, Xiang-Ren Chen, Ruey-Shin Juang, Siang -Yu Wei, Da -Yuan Lin
Summary: In this study, a cobalt germanium oxide-graphitic carbon nitride nanocomposite was developed for the electrochemical detection of ornidazole. The nanocomposite exhibited superior selectivity and high sensitivity towards ornidazole, and demonstrated good repeatability and stability in the analysis of real samples.
JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY
(2023)
Article
Engineering, Environmental
Kuen-Song Lin, Ndumiso Vukile Mdlovu, Ruey-Shin Juang, Mau-Tsu Tang
Summary: In Taiwan, the excessive emissions of pollutant gases from over 14 million motorcycles contribute significantly to air pollution in urban areas. In this study, the fine structures and oxidation states of Pt/Pd/Rh/Ce species in washcoat catalysts of motorcycle catalytic converters were investigated. The results showed that using Pt/Rh/Pd/Ce species on ceria/alumina washcoat effectively controlled the emissions of HCs pollutants through CO exclusion. The presence of an oxygen-rich environment facilitated the oxidation of Rh and Pd species, while the oxidation of Pt species was relatively more difficult. The transition metal in the washcoat catalysts was found to be consistent with the La-O distances at approximately 2.49 angstrom.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2023)