Article
Chemistry, Physical
Xuechang Ren, Renhua Chen, Suying Ding, Ning Fu
Summary: A magnetically recoverable ZnFe2O4 @TiO2 @Ag2O heterojunction composite photocatalyst was prepared, which showed high efficiency in degrading organic pollutants. The synergistic effect of the heterojunction and p-n junction improved the separation and transfer efficiency of photogenerated electron-hole pairs.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2023)
Article
Materials Science, Composites
Qinggang Fan, Tao Wang, Wei Fan, Lin Xu
Summary: Tubular Au/TiO2/SiO2 ternary nanocomposite with high-temperature ablation and noble metal deposition was successfully fabricated. SiO2 deposition inhibits the growth of TiO2 grain size, and the tubular structure effectively improves the utilization of visible-light. Au nanoparticles absorb visible-light, promote the formation of photogeneration-hole pairs, and act as an electron acceptor to delay the recombination rate of photogeneration electron-hole pairs, thereby improving the photocatalytic activity. Moreover, the composite gel of polyvinyl alcohol/polyvinylpyrrolidone (PVA/PVP) used for loading and immobilizing TiO2-based catalytic materials exhibits good photocatalytic activity and recyclability.
COMPOSITES COMMUNICATIONS
(2022)
Article
Polymer Science
Jiacheng Tan, Hangjun Deng, Fangfang Lu, Wei Chen, Xiuping Su, Hairong Wang
Summary: An antibacterial, recyclable nanocellulose-titanium dioxide/polyester nonwoven fabric composite was developed for highly efficient photocatalytic degradation of dyes. The composite showed stable degradation rates for methylene blue and acid red, as well as strong antibacterial properties.
Article
Materials Science, Multidisciplinary
Dedong Zeng, Jiangli Wang, Yu Xie, Yun Ling, Jinsheng Zhao, Hao Ye, Tongcai Chen
Summary: The TiO2@ZnFe2O4 heterojunctions show higher photocatalytic activities compared to individual TiO2 and ZnFe2O4, with the 1:4 molar ratio exhibiting the best performance and stability.
MATERIALS CHEMISTRY AND PHYSICS
(2022)
Article
Materials Science, Multidisciplinary
Qingqing Xu, Jiantao Feng, Yunyuan Dong, Liangchao Li
Summary: ZnFe2O4@RGO@TiO2 composites with a yolk-shell structure were successfully synthesized and showed promising catalytic performance in degrading RhB under visible light irradiation. The catalytic activity was significantly influenced by factors such as cavity size, solution pH, and dosage of catalyst and H2O2. Under optimal conditions, the degradation efficiency reached 94.3% with stable performance even after five cycles, indicating potential applications in wastewater treatment.
Article
Biochemistry & Molecular Biology
Fangyuan Zheng, Pedro M. Martins, Joana M. Queiros, Carlos J. Tavares, Jose Luis Vilas-Vilela, Senentxu Lanceros-Mendez, Javier Reguera
Summary: This study reports a ligand-free synthesis of TiO2:Au nanostars, which expands the light absorption spectral region. Nanoparticles with the smallest branching show the highest photocatalytic degradation under UV and visible radiation.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2022)
Article
Environmental Sciences
Izabela Malinowska, Pawel Kubica, Piotr Madajski, Adam Ostrowski, Cristina Gomez Polo, Laura Carvera, Waldemar Bednarski, Anna Zielinska-Jurek
Summary: In this study, a 2D/2D TiO2-GO-ZnFe2O4 composite photocatalyst was synthesized using the fluorine-free lyophilization technique and its potential for ibuprofen degradation was investigated. The composite showed enhanced degradation of ibuprofen under simulated solar light and possessed superparamagnetic properties for easy separation. The photodegradation process resulted in the formation of non-toxic intermediates, while photolysis led to the generation of more toxic by-products. Superoxide radicals and singlet oxygen were found to play significant roles in the ibuprofen photodegradation process based on the degradation analysis and electron spin resonance analysis.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2023)
Article
Environmental Sciences
Fangyuan Zheng, Pedro M. Martins, Joana M. Queiros, Carlos J. Tavares, Jose Luis Vilas-Vilela, Senentxu Lanceros-Mendez, Javier Reguera
Summary: Antibiotics are a harmful contaminant in water and contribute to the generation of antibiotic-multiresistant organisms. Plasmonic-photocatalysis using solar energy presents a promising solution for their removal. In this study, hybrid TiO2:Au nanostars were synthesized and two porous membranes were prepared as substrates for their immobilization.
Article
Chemistry, Physical
Xiaorong Meng, Yingzi Yang, Liping Zhang, Danghao Liu, Huiqi Zheng, Shanshan Huo, Yanan You
Summary: A magnetic recyclable ZnFe2O4/BiOBr (ZFB) heterojunction microspheres with oxygen vacancies were prepared, which showed improved separation efficiency and utilisation of photogenerated carriers. The ZnFe2O4 induced the growth of nanolayer structure on the surface of BiOBr, leading to increased diffraction peak intensity ratio and specific surface area. The ZFB exhibited a smaller bandgap, wider visible response range, and higher photogenerated carrier migration and separation efficiency compared to BiOBr. It could effectively degrade organic molecules such as Rhodamine B, norfloxacin, and sulfadiazine, with degradation efficiencies above 86.64%. The ZFB photocatalytic material demonstrated high recyclable efficiency and potential for simultaneous degradation of various micropollutants in organic wastewater.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Engineering, Chemical
Ravi Ravi, Animes Kumar Golder
Summary: A bio-based method was developed to synthesize Au-doped TiO2 using vegetal analytes from Sechium edule, which exhibited enhanced visible-light-driven photocatalytic degradation of pharmaceutically active compounds (PhACs) and good reusability.
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
(2023)
Article
Chemistry, Multidisciplinary
Kaja Spilarewicz, Kamil Urbanek, Anna Jakiminska, Wojciech Macyk
Summary: ZnFe2O4 (ZFO) composites with TiO2 (anatase, rutile) were synthesized and investigated for photocatalytic reduction of CO2 to CO. ZFO was obtained through precipitation from zinc and iron nitrates(V) precursors, followed by hydrothermal treatment, and its physicochemical properties were characterized. The results revealed that the ZFO/TiO2 systems formed type-I heterojunctions, which led to enhanced photoactivity of the composites. Furthermore, choosing anatase as the TiO2 polymorph favored higher yields of CO production.
JOURNAL OF CO2 UTILIZATION
(2023)
Article
Chemistry, Multidisciplinary
Hua-jun Chen, Jian-zhou Zhang, Xiao-jing Xi, Wen-jie Tian
Summary: Recyclable photocatalysts for large-scale applications have been difficult to develop due to limitations of traditional chemical epitaxial growth. However, TiO2@AC/CTs, which are composed of commercial P25 nanospheres coated with amorphous carbon and integrated with commercial carbon textiles, show great potential for industrial applications of photocatalytic technology. These materials exhibit enhanced performance through synergistic interactions of photocatalysis and electrocatalysis, and offer higher cycle stability and reduced recycling costs.
ENVIRONMENTAL SCIENCE-NANO
(2023)
Article
Engineering, Environmental
Yan Gao, Baoying Yang, Yang Yang, Hongbo Ming, Guodong Liu, Jinshui Zhang, Yidong Hou
Summary: ZnFe2O4 is a promising photocatalyst in wastewater treatment, but its high recombination rate and metal ion leaching greatly limit its practical application. Carbon-coating strategy improved the photocatalytic performance by enhancing charge carrier separation and ozone utilization, and inhibiting metal leaching. Moreover, the carbon-coated ZnFe2O4 can be easily separated using an external magnetic field.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2022)
Article
Energy & Fuels
Muhammad Suleman Tahir, Numair Manzoor, Muhammad Sagir, M. B. Tahir, Tasmia Nawaz
Summary: In this study, p-n type heterojunction ZnFe2O4/TiO2 photocatalysts with different ratios were prepared and it was found that ZnFe2O4/TiO2 (1:1,5) exhibited the highest photocatalytic activity for CO2 reduction into methanol. The material showed characteristics of high crystallinity, purity, small particle size, absorption in visible light region, and low charge carrier recombination, contributing to the efficiency of methanol production.
Article
Engineering, Chemical
Kuiliang Liu, Daoming Chen, Siqi Zhang, Peiyang Su, Yongchao Huang
Summary: The study introduced carbon into the contact interface between ZnFe2O4 and TiO2 to enhance electrical conductivity and improve the separation efficiency of photogenerated electrons. This resulted in improved catalytic activity for tetracycline (TC) degradation and stability under visible light irradiation. The research provides an effective strategy for preparing heterojunction photocatalysts by enhancing the conductivity of the contact interface.
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
(2021)
Article
Engineering, Environmental
Yuefa Jia, Shiping Li, Haoxuan Ma, Jianzhi Gao, Gangqiang Zhu, Fuchun Zhang, Jun Young Park, Sangwon Cha, Jong-Seong Bae, Chunli Liu
JOURNAL OF HAZARDOUS MATERIALS
(2020)
Article
Chemistry, Analytical
Jinyoung An, Ye-Yeong Kim, Hyun-Deok Cho, Junhee Kim, Ji-Youn Lee, Yeoreum Lee, Eunji Jo, Jaeick Lee, Sangwon Cha, Sang Beom Han
JOURNAL OF PHARMACEUTICAL AND BIOMEDICAL ANALYSIS
(2020)
Article
Multidisciplinary Sciences
Jiwoong Kwon, Jong-Seok Park, Minsu Kang, Soobin Choi, Jumi Park, Gyeong Tae Kim, Changwook Lee, Sangwon Cha, Hyun-Woo Rhee, Sang-Hee Shim
NATURE COMMUNICATIONS
(2020)
Article
Chemistry, Multidisciplinary
Soobin Choi, Sangwon Cha
BULLETIN OF THE KOREAN CHEMICAL SOCIETY
(2020)
Article
Biochemistry & Molecular Biology
Junhee Kim, Hyun-Deok Cho, Joon Hyuk Suh, Ji-Youn Lee, Eunyoung Lee, Chang Hwa Jin, Yu Wang, Sangwon Cha, Hosub Im, Sang Beom Han
Article
Chemistry, Analytical
Hyun-Deok Cho, Junghyun Kim, Ji-Youn Lee, Ye-Yeong Kim, Yeoreum Lee, Eunji Jo, Joon Hyuk Suh, Jaeick Lee, Sangwon Cha, Sang Beom Han
Article
Biochemical Research Methods
Hyungjun Kim, Hyunwoo Lee, Daesub Kum, Heungsik Tae, Sangwon Cha, Donghwi Kim, Sunghwan Kim
Summary: This study confirmed the occurrence of corona discharge when using nonpolar solvents and proposed its mechanism. Evaluation of different solvents for analyzing crude oil sensitivity revealed that chlorobenzene is the optimal solvent for PSCI.
JOURNAL OF MASS SPECTROMETRY
(2021)
Article
Chemistry, Organic
Kyuho Moon, Jinsheng Cui, Eunji Kim, Evan Setiawan Riandi, So Hyun Park, Woong Sub Byun, Youngju Kal, Jun Young Park, Sunghoon Hwang, Daniel Shin, Jeongyoon Sun, Ki-Bong Oh, Sangwon Cha, Jongheon Shin, Sang Kook Lee, Yeo Joon Yoon, Dong-Chan Oh
Article
Biochemistry & Molecular Biology
Youngju Kal, Sangwon Cha
Summary: Paper spray ionization (PSI) is an extractive ambient ionization technique for mass spectrometry, which can achieve the separation and detection of lipid mixtures. The study found that differential transport of lipid classes occurs during PSI, depending on the polarity of the spraying solvent and the method of application.
Article
Chemistry, Analytical
Jun Young Park, Sarmila Amatya Shrestha, Sangwon Cha
Summary: The study investigated the feasibility of using reversed-phase liquid chromatography to separate ganglioside isomers, successfully achieving the isomer separation of disialogangliosides and trisialogangliosides for the first time. Crucial factors in the mobile-phase composition, such as the organic modifier acetonitrile and the ammonium salt additive ammonium bicarbonate, were identified to influence the differential retention and mass spectral response of the isomers.
JOURNAL OF SEPARATION SCIENCE
(2021)
Article
Biochemical Research Methods
Kang Mi Lee, Sang Moon Han, Seunghwa Lee, Tae Young Jeong, Ho Jun Kim, Hophil Min, Ki Hun Kim, Sangwon Cha, Won Keun Oh, Jaeick Lee
Summary: A fluoride-assisted LC-MS/MS method combined with direct injection was developed for propofol determination, showing good sensitivity, accuracy, and practicality. The method was successfully applied to human urine, allowing the determination of propofol and its metabolites over 48 hours with sufficient sensitivity.
JOURNAL OF CHROMATOGRAPHY A
(2021)
Review
Chemistry, Analytical
Sarmila Amatya Shrestha, Sangwon Cha
Summary: The paper reviews the application of ambient desorption/ionization mass spectrometry in the direct analysis of solid materials, covering various sampling and desorption processes. Real-world analysis cases include pharmaceuticals, food products, forensic analysis, and surface contaminant analysis. ADI techniques provide efficient and simplified methods for direct desorption and ionization of analytes from untreated samples under ambient conditions.
TRAC-TRENDS IN ANALYTICAL CHEMISTRY
(2021)
Article
Environmental Sciences
Seunghwa Lee, Kang Mi Lee, Sang Moon Han, Hyeon-Jeong Lee, Changmin Sung, Hophil Min, Hosub Im, Sang Beom Han, Sangwon Cha, Jaeick Lee
Summary: To assess the combined effects of environmental pollutants (EPOLs), a comprehensive analytical method was developed to simultaneously analyze multiple EPOLs. The method overcame technical challenges associated with enzyme hydrolysis, simultaneous extraction, and analysis. The method was validated and showed potential for long-term, large-scale, and data-rich human biomonitoring of EPOLs.
ENVIRONMENTAL RESEARCH
(2022)
Article
Biochemistry & Molecular Biology
Sangwon Cha, Gyouwoong Jun, Yougyeong Park, Sung Jun An, Donghoon Lee
Summary: Nanospray desorption electrospray ionization (nano-DESI) was used to analyze the metabolite fingerprints on Hypericum leaves. The intensity changes of key metabolites over time were observed through full mass scan experiments and monitored using selected ion monitoring and pseudo-selected reaction monitoring experiments. The correlation between the time-dependent changes in the metabolite fingerprints and depth-wise metabolite distribution was examined by removing the surface layers of the leaves multiple times.
Article
Biochemical Research Methods
Gwangbin Lee, Sangwon Cha
Summary: Nano-DESI MS has been explored in the forensic chemical analysis of ink directly from handwriting on paper, showing the potential for changing mass spectral profiles over time to reflect the differential distribution of analytes in a vertical direction. The study confirmed the capability of the depth-dependent analysis of nano-DESI MS.
JOURNAL OF THE AMERICAN SOCIETY FOR MASS SPECTROMETRY
(2021)