Article
Chemistry, Physical
Wenwen Li, Hongyan Wang, Zhe Sun, Quanping Wu, Song Xue
Summary: By depositing amorphous SiOx overlayers on the surface of cuprous oxide (Cu2O), the photocurrent density and stability of Cu2O as a photocathode have been significantly improved, addressing issues of poor performance and photo-corrosion. The gradient-doped Si into Cu2O promotes charge separation and transfer efficiently, while the amorphous SiOx layers act as protective layers to maintain high photocurrent density over stability tests. Additionally, decoration with Pt catalyst further enhances the photocurrent density and stability through a synergistic effect with the SiOx layer.
JOURNAL OF POWER SOURCES
(2021)
Article
Chemistry, Physical
Feng Li, Wangshu Zheng, Jing Liu, Liping Zhao, Djordje Janackovic, Yu Qiu, Xuefeng Song, Peng Zhang, Lian Gao
Summary: In this study, Ti-doped hematite with ordered mesoporous structure was synthesized and coated on TiO2-protected silicon, significantly enhancing the photoelectrochemical performance. Ti doping led to a more uniform dispersion of photoelectrons on the surface, while the low electronic concentration in the TiO2 layer prolonged the device lifetime. This research provides an effective protection mechanism for composite photoelectrodes, offering a promising strategy for protecting the photocathode through surface decoration with carefully tailored catalysts.
ACS APPLIED ENERGY MATERIALS
(2021)
Article
Chemistry, Multidisciplinary
Hyo Eun Kim, Jeehye Kim, Eun Cheol Ra, Hemin Zhang, Youn Jeong Jang, Jae Sung Lee
Summary: The study investigates the photoelectrochemical nitrate reduction reaction (PEC NO3RR) for green ammonia production, achieving a high Faradaic efficiency of 95.6% using an Au-decorated ordered silicon nanowire (O_SiNW) array photocathode. The O_SiNW structure is favorable for promoting the reaction and utilizing photovoltage to achieve high ammonia production efficiency.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2022)
Article
Chemistry, Multidisciplinary
Zhihe Wei, Yanhui Su, Weiyi Pan, Junxia Shen, Ronglei Fan, Wenjun Yang, Zhao Deng, Mingrong Shen, Yang Peng
Summary: Silicon semiconductor functionalized with graphene layer and catalyst immobilization improves the performance and stability of the photocathode. Altering the stacking configuration of the immobilized catalyst further enhances the electron transfer rate and the photoelectrochemical (PEC) performance. The graphene-coated Si cathode immobilized with catalyst demonstrates remarkable PEC CO2RR performance in neutral solution.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Article
Chemistry, Multidisciplinary
Chengjin Li, Xiaoxia Zhou, Qingming Zhang, Yi Xue, Zhaoyu Kuang, Han Zhao, Chung-Yuan Mou, Hangrong Chen
Summary: By synthesizing a novel photocathode Sn/TiO2/Si, the light absorption performance and electron transfer efficiency can be improved, promoting efficient photoelectrochemical reduction of CO2 to produce liquid products, with great potential.
Article
Chemistry, Analytical
Hui-Yu Zou, Fen-Ying Kong, Xin-Yang Lu, Meng-Jiao Lu, Yuan-Cheng Zhu, Rui Ban, Wei-Wei Zhao, Wei Wang
Summary: The study presents the design and development of a 3D hierarchical CdS/NiO heterojunction for self-powered cathodic photoelectrochemical bioanalysis, which achieved glucose detection with high sensitivity and selectivity.
Article
Nanoscience & Nanotechnology
Min-Kyu Son, Linfeng Pan, Matthew T. Mayer, Anders Hagfeldt, Michael Gratzel, Jingshan Luo
Summary: Cuprous oxide is a promising photocathode material for PEC water splitting, but suffers from poor stability in strong acidic or alkaline conditions. Improvements in performance have been made by introducing nanostructures and catalysts, but further research is needed to establish suitable protection strategies for durable PEC water splitting.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Article
Electrochemistry
L. Allad, D. Allam, K. Benfadel, S. Kaci, M. Leitgeb, A. Ouerek, A. Boukezzata, C. Torki, S. Bouanik, S. Anas, L. Talbi, Y. Ouadah, S. Hocine, A. Keffous, S. Achacha, A. Manseri, F. Kezzoula
Summary: In this study, n-type nanostructured PbS thin films were prepared by chemical bath deposition onto flat silicon and silicon nanowires. The morphological characterization, optical properties, and catalytic activity were investigated. The results showed that PbS/SiNWs exhibited higher photocatalytic activity towards CO2 reduction and could be used as a photocathode for the PEC reduction of CO2 to methanol.
JOURNAL OF APPLIED ELECTROCHEMISTRY
(2022)
Article
Chemistry, Physical
D. Amaranatha Reddy, Yujin Kim, Pooja Varma, Madhusudana Gopannagari, K. Arun Joshi Reddy, Da Hye Hong, Inae Song, D. Praveen Kumar, Tae Kyu Kim
Summary: This paper introduces an inverse opal-like structured photocathode fabricated using a layered self-assembly approach for photoelectrochemical water-splitting cells. The photocathode has an interconnected macroporous structure that enhances visible-light-harvesting capabilities and improves charge-carrier transport properties. The optimized photocathodes showed high photocurrent density and stability, as well as exceptional photon harvesting and quantum yields.
ACS APPLIED ENERGY MATERIALS
(2022)
Article
Materials Science, Ceramics
Suyao Man, Xueyang Leng, Jinlong Bai, Sihan Kan, Yanan Cui, Jiaxin Wang, Lingling Xu
Summary: Doping with trivalent samarium (Sm3+) ions is effective for improving the photoelectrochemical performance of bismuth ferrite (BiFeO3) photocathodes for water reduction. The doped samples exhibited significantly enhanced water reduction activity, with the Bi0.95Sm0.05FeO3 composition showing a maximum photocurrent density of 0.1061 mA cm(-2) at 0 V vs. RHE in 0.5 M Na2SO4, which was 5.6 times higher than that of the pristine BiFeO3. The high performance can be attributed to the rational Sm3+ doping, which improves visible light absorption ability, facilitates charge carrier transport kinetics, and hinders the recombination of photogenerated carriers.
CERAMICS INTERNATIONAL
(2023)
Article
Materials Science, Multidisciplinary
Liujing Li, Tingting Liu, Zhongyuan Zhou, Peiji Guo, Xiaofeng Li, Shaolong Wu
Summary: This research reports a facile and low-cost method to decorate Si photocathodes with Ag-Pt nanoparticles, which significantly enhance the hydrogen evolution reduction kinetics without degrading the optical performance. This study opens a new opportunity for photo-assisted decoration of various alloy NPs on morphology-varying photoelectrodes.
SCIENCE CHINA-MATERIALS
(2022)
Article
Chemistry, Multidisciplinary
Qingming Zhang, Xiaoxia Zhou, Zhaoyu Kuang, Yi Xue, Chengjin Li, Min Zhu, Chung-Yuan Mou, Hangrong Chen
Summary: The study confirmed the high performance of the Bi-Bi2O3/ZnO/p-Si photocathode in the CO2 reduction reaction through a series of experiments, which not only improved the light absorption capacity, but also increased the selectivity of CO2 reduction products. Furthermore, this material showed high stability and photoelectrochemical activity.
ACS SUSTAINABLE CHEMISTRY & ENGINEERING
(2022)
Article
Chemistry, Physical
Mi Jung, Chang Woo Kim, So Yeon Kim, Amol U. Pawar, Don Keun Lee, Young Soo Kang
Summary: In this study, a functionalized photocathode using reduced graphene oxide (rGO) was investigated for the selective production of solar liquid fuels. The functionalization of rGO layers on the photocathode improved the charge transfer efficiency and enabled the production of liquid fuels selectively.
ADVANCED ENERGY MATERIALS
(2022)
Article
Chemistry, Analytical
Yibin Lu, Yaqun Xu, Tongtong Ding, Caifeng Ding, Gao-Chao Fan, Xiliang Luo
Summary: Photocathodic immunosensors, based on a featured photocathode-photoanode system, demonstrate stronger anti-interference abilities compared to photoanodic immunosensors. By integrating a photocathode with a photoanode, this efficient and feasible photoelectrochemical immunosensor allows for sensitive and specific detection of target antigens. This strategy provides a promising approach for developing high-performance PEC immunosensors for biological matrix detection.
ANALYTICA CHIMICA ACTA
(2022)
Article
Nanoscience & Nanotechnology
Javier Quinonero, Francisco J. Pastor, Jose M. Orts, Roberto Gomez
Summary: The study demonstrates that transparent NdFeO3 thin-film photocathodes are successfully prepared using a citric acid-based sol-gel procedure and thermal treatment in air. Doping with Mg2+ and Zn2+ significantly enhances the photoelectrocatalytic performance of NdFeO3.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Article
Engineering, Environmental
Jiajian Xing, Haiguang Zhang, Gaoliang Wei, Lei Du, Shuo Chen, Hongtao Yu, Xie Quan
Summary: By incorporating molybdenum sulfide (MoS2) nanosheets and applying external electrical assistance, both the 2D channel and charge density of reduced graphene oxide (rGO) membranes were regulated to enhance water flux and salt rejection. The resulting rGO/MoS2 membranes exhibited expanded nanochannels, resulting in significantly increased water permeance. In addition, the high capacitance and negative potential of the membranes contributed to improved rejection rates for NaCl and Na2SO4 ions. This study provides new insights for the design of membranes with high water flux and salt rejection efficiency.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2023)
Article
Multidisciplinary Sciences
Peike Cao, Xie Quan, Xiaowa Nie, Kun Zhao, Yanming Liu, Shuo Chen, Hongtao Yu, Jingguang G. G. Chen
Summary: The authors report a scalable cobalt single-site catalyst for hydrogen peroxide synthesis at industrial-relevant currents in acidic, neutral or alkaline electrolyte, providing a sustainable alternative to traditional anthraquinone technology.
NATURE COMMUNICATIONS
(2023)
Review
Chemistry, Multidisciplinary
Xinfei Fan, Gaoliang Wei, Xie Quan
Summary: Membrane separation is widely used in water and wastewater treatment due to its cost-effectiveness, ease of operation, and high efficiency. However, current membranes face challenges in balancing selectivity and permeability, as well as dealing with membrane fouling. Recent studies have focused on developing high-performance membranes based on carbon nanomaterials, such as carbon nanotubes and graphene, to improve water and wastewater treatment. These carbon nanomaterial-based membranes demonstrate enhanced permselectivity and fouling resistance under electrochemical assistance, thanks to their good electrical conductivity. This review summarizes the progress in the preparation, mechanisms, and applications of electroconductive nanocarbonaceous membranes for water purification and wastewater treatment, aiming to enhance the fundamental understanding of combining membrane separation and electrochemistry. The review covers methods for preparing electroconductive membranes, such as carbon nanotube membranes and graphene membranes, as well as the underlying mechanisms for the improved permselectivity, antifouling, and regeneration performance achieved through electrochemical processes. The review also discusses practical limitations of membrane/electrochemistry systems and proposes possible solutions.
ENVIRONMENTAL SCIENCE-NANO
(2023)
Article
Chemistry, Physical
Lanlan Liang, Peike Cao, Xin Qin, Shuai Wu, Haokun Bai, Shuo Chen, Hongtao Yu, Yan Su, Xie Quan
Summary: Developing efficient and interference-tolerant catalysts for practical use in catalytic ozonation process is challenging. In this study, a surface Vo-rich catalyst was prepared by doping Co into zinc ferrite spinel, showing efficient mineralization of recalcitrant organic pollutants. The removal of contaminants was mainly attributed to nonradical-based oxygen species, *O, rather than traditional hydroxyl radicals, •OH. The Vo-driven nonradical catalysis exhibited high resistance to coexisting ions and excellent performance in actual wastewater treatment, providing a novel strategy for efficient mineralization of pollutants in complicated water matrices.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2023)
Article
Engineering, Environmental
Xueyang Zhao, Qin Geng, Fan Dong, Kun Zhao, Shuo Chen, Hongtao Yu, Xie Quan
Summary: Electrochemically reducing nitrate to ammonia is an efficient method to address nitrate pollution. However, controlling the selectivity and kinetics of ammonia production remains a challenge. In this study, a single-atom Cu catalyst was developed for selective and efficient nitrate reduction, achieving high Faradic efficiency and ammonia selectivity. DFT calculations revealed the underlying mechanism, demonstrating the superiority of the single-atom Cu catalyst over Cu nanoparticle catalyst. This research provides a strategy for designing electrocatalysts for efficient and selective ammonia production via nitrate reduction.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Engineering, Environmental
Xin Qin, Peike Cao, Xie Quan, Kun Zhao, Shuo Chen, Hongtao Yu, Yan Su
Summary: In this study, a dual-atomic-site catalyst (CoFe DAC) was proposed to cooperatively catalyze middotOH electrogeneration. The CoFe DAC showed higher middotOH production rate compared to single-site catalysts, and it was more energy-efficient for coking wastewater treatment.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2023)
Article
Engineering, Environmental
Gaoliang Wei, Lei Du, Haiguang Zhang, Jiajian Xing, Shuo Chen, Xie Quan
Summary: In this study, it was found that electrochemical treatment can expand the restacked regions of reduced graphene oxide (rGO) membranes, leading to the formation of ultrafast water transport nanochannels. The expansion is driven by hydrogen bond interactions between water molecules and electrochemically produced hydroxyl groups on the edges of rGO nanosheets. The treated rGO membranes exhibit a permeance 2 orders of magnitude higher than pristine rGO membranes and about 3 times higher than graphene oxide membranes. Additionally, the rGO membranes also show higher ionic/molecular rejection performance due to their smaller average pore size.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2023)
Article
Green & Sustainable Science & Technology
Wenda Kang, Lujie Li, Shuai Wu, Jiajie Yang, Hengjun Liu, Hongtao Yu, Zhangliang Li
Summary: Electrochemical technology effectively removes nitrate from recirculating aquaculture saltwater. An electrochemical filter with mesh electrodes was created to increase diffusion distance and counteract electrostatic repulsion. The filter achieved a nitrate concentration of 2.0 mg/L, meeting the water quality standard for aquatic mammals in aquariums.
JOURNAL OF CLEANER PRODUCTION
(2023)
Article
Multidisciplinary Sciences
Hai-Guang Zhang, Xie Quan, Lei Du, Gao-Liang Wei, Shuo Chen, Hong-Tao Yu, Ying-Chao Dong
Summary: Researchers propose an electropolarization strategy using vertically aligned reduced graphene oxide (VARGO) membrane to regulate interfacial hydrogen-bond and electrostatic interactions, achieving high water permeation and ion rejection performance.
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
(2023)
Article
Engineering, Chemical
Qi An, Hang Zhang, Ning Liu, Shuai Wu, Shuo Chen
Summary: In this study, Fe-doped graphite carbon nitride was prepared to suppress the recombination of photogenerated charges, resulting in an improved photo-Fenton performance for the removal of organic pollutants.
SEPARATION AND PURIFICATION TECHNOLOGY
(2023)
Article
Engineering, Environmental
Qilin Yu, Haohao Mao, Zhiqiang Zhao, Xie Quan, Yaobin Zhang
Summary: As a major driver of global methane production, methanogens are exposed to an environment filled with dynamic electromagnetic waves, which may induce electromotive force (EMF) to potentially influence methanogen metabolism. This study found that exposure to a dynamic magnetic field increased biogas production through induced EMF. The methane emissions from sediments increased by 41.71% when exposed to a dynamic magnetic field with an intensity of 0.20 to 0.40 mT. The EMF accelerated the respiration of methanogens and bacteria, leading to enhanced microbial metabolism.
Article
Chemistry, Multidisciplinary
Muhammad Irfan Ahmad, Shuo Chen, Hongtao Yu, Xie Quan
Summary: This study demonstrates the successful production of H2O2 by introducing reduced graphene oxide (rGO) into SnO2, which enhanced light absorption and reduced the energy band gap. Among different concentrations of rGO, 0.5wt% rGO-SnO2 showed the highest H2O2 yield. The findings provide valuable guidance for designing efficient photocatalysts for H2O2 generation.
ACS SUSTAINABLE CHEMISTRY & ENGINEERING
(2023)
Article
Engineering, Environmental
Chengyu Yuan, Yuxin Li, Lulu Qian, Jiajian Xing, Xu Wang, Haiguang Zhang, Lei Du, Gaoliang Wei, Shuo Chen, Xie Quan
Summary: This study presents a molten salt intercalation method for the fabrication of an Al3+-intercalated MXene membrane with good antiswelling ability. The intercalated membrane shows significant increase in the Al-O group and Al content, while in situ XRD tests confirm the stability of d-spacing with Al3+ intercalation. The membranes demonstrate excellent separation efficacy for organic dyes and antibiotics with rejection rates exceeding 90%.
ACS ES&T ENGINEERING
(2023)
Article
Engineering, Environmental
Yanping Shi, Tao Liu, Xie Quan, Shuo Chen, Hongtao Yu, Wuzhe Quan
Summary: A municipal WWTP upgraded its process to A2O-IFFAS by filling ZVI-modified biofilm carriers into anoxic bioreactors and clinoptilolite-modified biofilm carriers into aerobic bioreactors. The upgraded process achieved high nitrogen removal efficiency and met the discharge standard requirements.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Engineering, Chemical
Yunfei Yu, Xue Yang, Chenchen Zhang, Jie Chen, Wei Lin, Jianqiang Meng
Summary: This study reports an environmentally friendly and simple approach for preparing double-network (DN) ion gel membranes with high strength and excellent gas separation performance. By optimizing crosslinking density, mass ratio, and the type and content of free ionic liquid, the mechanical and gas separation properties of the DN membrane are improved.
SEPARATION AND PURIFICATION TECHNOLOGY
(2024)
Article
Engineering, Chemical
Si-qi Jiang, Qiang Gao, Xi-guang Li, Chao-zhu Deng, Jun Qiu, Xiang-nan Zhu
Summary: A dual-strengthening pretreatment method is proposed to remove PVDF more efficiently and enhance the leaching of LiCoO2. Experimental results show that dual-strengthening pretreatment can effectively remove PVDF and significantly improve the leaching efficiency compared to single pretreatment methods.
SEPARATION AND PURIFICATION TECHNOLOGY
(2024)
Article
Engineering, Chemical
Zengchi Hu, Xiaoyu Wang, Xiaohui Zhang, Xue Li, Jiangbin Xia
Summary: The rapid fabrication of high-performance composite membranes based on CMPs using simple and low-cost methods is challenging. In this study, three CMPs-based composite membranes were rapidly fabricated with adjustable size using unidirectional diffusion synthesis. The microstructural design enhanced the rejection rates of the membranes and they showed strong hydrolytic resistance, thermal stability, and acid-base resistance. Electrostatic adsorption and the adjustable microstructures significantly varied the repellence of the membranes to different charged molecules.
SEPARATION AND PURIFICATION TECHNOLOGY
(2024)
Article
Engineering, Chemical
Farzaneh Rouhani, Matineh Ayedi, Nasser Safari
Summary: Introducing defects into porous metal-organic frameworks is important for improving their adsorption performance. Quasi-MOFs, an underutilized variant of large-scale, fundamentally deficient MOFs, have been found to have substantial amounts of unsaturated metal sites to offset the drawbacks of MOFs. In this study, a quasi-MOF was produced using a water-stable MOF and demonstrated significantly improved phosphate adsorption capability due to the presence of defect sites.
SEPARATION AND PURIFICATION TECHNOLOGY
(2024)
Article
Engineering, Chemical
Valentin Reungoat, Morad Chadni, Louis M. M. Mouterde, Fanny Brunissen, Florent Allais, Helene Ducatel, Irina Ioannou
Summary: This study focuses on the recovery of sinapic acid using liquid-liquid extraction assisted by a hollow fiber membrane contactor from an aqueous feed obtained through the hydrolysis of mustard bran. The screening of solvents of different chemical nature showed that all tested solvents had an extraction efficiency of more than 80% for pH < 5. Four solvents were selected for use in the hollow fiber membrane contactor, and the volatile solvents showed higher mass transfer coefficients compared to non-volatile solvents. The extraction efficiency was intensified by increasing the initial concentration of sinapic acid and the feed-to-solvent ratio. CPME was found to have optimal recovery efficiency at a phase ratio of 8:1, yielding 0.9 g of sinapic acid per liter of CPME used.
SEPARATION AND PURIFICATION TECHNOLOGY
(2024)
Article
Engineering, Chemical
Takahiro Sakamoto, Takafumi Hanada, Hayate Sato, Mayu Kamisono, Masahiro Goto
Summary: The emergence of the battery society has led to a high demand for battery metals, resulting in a strain on their supply. This study introduces a novel technique using a hydrophobic deep eutectic solvent (DES) for leaching and recovering battery metals from low-grade nickel laterite ores. The DES enables selective leaching and recovery of the metals, offering a promising pathway for the extraction of critical battery metals.
SEPARATION AND PURIFICATION TECHNOLOGY
(2024)
Article
Engineering, Chemical
Rongrong He, Jiarui Chen, Chunyao Zhang, Dan Lu, Lin Zhang, Tao He
Summary: Researcher has developed a method to quantify the charge density in nanofiltration (NF) membrane separation layer and applied it in NF membranes that can separate Mg2+ and Li+. The results showed that overcompensated amine groups played a major role, and there was a linear relationship between charge density and coating bi-layers or PAH layers.
SEPARATION AND PURIFICATION TECHNOLOGY
(2024)
Article
Engineering, Chemical
Zhijian Zhang, Min Chen, Zhe Lin, Zhichao Yang, Yafeng Du, Zhihui Chen, Zhenhao Yang, Kongyin Zhao, Ligang Lin
Summary: Membrane technology plays an important role in molecular/ion separation processes, but faces challenges such as membrane fouling. This study introduces a new ion-crosslinking method to fabricate copper alginate hydrogel membranes with improved mechanical strength and antimicrobial capabilities. The membranes exhibit excellent separation performance and enhanced long-term molecule/ion separation through improved anti-swelling properties. Molecular dynamics simulations and life cycle analysis highlight the pore structure and environmental friendliness of the hydrogel membranes. These findings provide valuable insights for developing sustainable hydrogel membranes with stable performance and high separation efficiency.
SEPARATION AND PURIFICATION TECHNOLOGY
(2024)
Article
Engineering, Chemical
Dongmei Liu, Aiying Guo, Yanling Qi, Zhixin Ji, Hongjuan Li, Zhiwei Zhang, Xinyue Zhang, Kunze Wu, Aijun Cai
Summary: In this study, a stable magnetic Mg/Mn-layered double oxide-doped biochar composite (MgMnLDO-MBC) was prepared and successfully used for the removal of antibiotics and bacteria from wastewater. The composite exhibited enhanced surface areas, adsorption sites, and free radicals, leading to improved catalytic activity. The effects of different factors on the removal efficiency were evaluated, and the composite showed good reusability.
SEPARATION AND PURIFICATION TECHNOLOGY
(2024)
Article
Engineering, Chemical
Feng Wang, Zhaoyong Bian, Yaru Zhang, Wenchao Yu, Qiang Zhang, Hui Wang
Summary: In this study, a nanofibrous layered structure of Ff-Ti3C2Tx-Co3O4 was prepared by self-assembling nanofibrous Co3O4 with lamellar fluorine-free MXene (Ff-Ti3C2Tx). The Ff-Ti3C2Tx-Co3O4 exhibited excellent catalytic activity for degradation, resistant to ionic interference, and maintained high removal efficiency of sulfamethoxazole (SMX) in municipal wastewater. The rapid SMX degradation involved fast electron transfer in redox cycles with PMS and the generation of 1O2 via PMS ->center dot O2 -> 1O2. This work provides new insights into antibiotic degradation mechanisms and electron transfer based on PMS activation.
SEPARATION AND PURIFICATION TECHNOLOGY
(2024)
Article
Engineering, Chemical
Weipeng He, Jiacheng Luo, Yujie Wu, Tianhao Luo, Chen Tang
Summary: This study comparatively evaluated the role of cationic, anionic, and nonionic polyacrylamides (PAMs) in ballasted flocculation of clay suspensions under different aluminum sulfate (AS) coagulant dosages. The selection of PAMs and AS dosage had a significant influence on the size and shear resistance of ballasted floc aggregates.
SEPARATION AND PURIFICATION TECHNOLOGY
(2024)
Article
Engineering, Chemical
Lixian Wang, Lizhi Zhao, Didi Si, Zhixin Li, Huiqin An, Hui Ye, Qingping Xin, Hong Li, Yuzhong Zhang
Summary: Metalloporphyrin-based nanozymes integrated with poly (vinylidene fluoride) membrane show high catalytic activity and reusability for the decolorization of Congo Red dye in continuous flow process.
SEPARATION AND PURIFICATION TECHNOLOGY
(2024)
Article
Engineering, Chemical
Yongfei Ma, Chenyu Zeng, Yongzhen Ding, Jiayi Tang, Ondrej Masek, Zhikang Deng, Rui Mu, Zulin Zhang
Summary: In this study, sludge-derived biochar (SBC) was functionalized with various iron salts to enhance its adsorption ability for sulfamethoxazole (SMX) and magnetic collection performance. Ball milling was further employed to treat the optimal iron salt functionalized SBC (MSBC), resulting in ball milled SBC (BMSBC) with improved adsorption performance for SMX. The dominant driving mechanism for SMX adsorption onto BMSBC was confirmed to be multiple physicochemical forces, including 7C-7C conjugation, pore filling, H-bonding, Fe-O complexation, and electrostatic interactions. BMSBC exhibited favorable adsorption ability for SMX in actual waters and could be easily collected within 1 min due to its magnetic sensitivity.
SEPARATION AND PURIFICATION TECHNOLOGY
(2024)
Article
Engineering, Chemical
Jinglin Tan, Xiaohui Mao, Wenjihao Hu, Hongbo Zeng
Summary: This study investigates the influence of PDMS chain architectures on surface properties and reveals that PDMS coatings with looped structures exhibit superior hydrophobicity, self-cleaning, and water sliding compared to coatings with linear structures. Additionally, both looped and linear PDMS coated stainless steel mesh/polyester fibers show efficient separation of oil/water mixture.
SEPARATION AND PURIFICATION TECHNOLOGY
(2024)
Article
Engineering, Chemical
Wei-Liang Chen, Chih-Chia Cheng, Chien-Hsing Lu, Jem-Kun Chen
Summary: This study designs a novel sandwich-structured capacitor that reduces the absorption time of pollutants using dielectrophoresis force. By coating graphene oxide on polystyrene microspheres as adsorbents and encapsulating them within the capacitor, the adsorption rate is significantly enhanced. Additionally, frequency manipulation allows for the recycling of adsorbents and concentration of dyes, minimizing secondary pollution.
SEPARATION AND PURIFICATION TECHNOLOGY
(2024)