Article
Energy & Fuels
Qihang Zhou, Haoyi Yao
Summary: Carbon-based materials have gained attention as active electrode materials for supercapacitors due to their unique advantages, offering efficient energy storage capabilities, especially with excellent cycle performance at high rates. Research indicates that defects and doping within carbon materials significantly impact the performance of supercapacitors.
Article
Chemistry, Analytical
Tauseef Munawar, Muhammad Shahid Nadeem, Faisal Mukhtar, Sumaira Manzoor, Muhammad Naeem Ashiq, Muhammad Riaz, Altaf Hussain, Faisal Iqbal
Summary: Nd2CeMO3 (M = Er, Sm, V) nanostructures based on rare earth neodymium oxide were synthesized using a sol-gel method and characterized. The co-doped samples exhibited high electrical conductivity and superior supercapacitive behavior, with the Er-Ce co-doped electrode showing the highest specific capacitance, energy density, and power density. The plate-like morphology of the co-doped electrode provided a larger surface area for ion transportation and contributed to its excellent performance.
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
(2022)
Article
Environmental Sciences
Fan Zhang, Weilai Wang, Lei Xu, Chengzhi Zhou, Yanglong Sun, Junfeng Niu
Summary: The study successfully achieved electrochemical degradation of Ni-EDTA using ECR-TiO2 NTA electrode, with high removal efficiency and the main degradation pathway involving cleavage of the amine group within Ni-EDTA. Results demonstrate that ECR-TiO2 NTA has excellent efficiency in removing Ni-EDTA.
Article
Engineering, Electrical & Electronic
You Wu, Peng Xiang, Lihua Jiang, Ting Xiao, Xinyu Tan
Summary: A simple heat treatment strategy was used to modify the electrolytic performance of TiO2 microsphere electrode, resulting in increased micropores, moderate mesopores, and reduced hydrophobic groups on the surface of TiO2. This improved the electrochemical performance of the TiO2 microsphere electrode. After heat treatment, the areal capacitance of the TiO2 microsphere electrode increased from 4.95 to 58.58 mF/cm(2) at a current density of 1 mA/cm(2), with a capacitance retention rate of 96.9% after 10,000 cycles. This simple heat treatment modification method shows great potential for the application of supercapacitors in energy storage.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2023)
Article
Energy & Fuels
Weiwei Zhu, Dekui Shen
Summary: The development of high-performance anode materials is crucial for enhancing the electrochemical performance of asymmetric supercapacitors. In this study, nickel ferrite/nitrogen-doped porous carbon composite was successfully synthesized and exhibited improved electrochemical properties. The specific capacitance, energy density, and cycle stability of the composite were significantly enhanced by increasing the nitrogen content on the porous carbon surface. The nitrogen atoms provided active sites for the growth of nickel ferrite nanoparticles, enhancing the interfacial effect between the nanoparticles and carbon materials.
JOURNAL OF ENERGY STORAGE
(2023)
Article
Biochemistry & Molecular Biology
Xingyu Liu, Mengdi Wang, Xiang Wu
Summary: In this study, 0.3Mn-Co3O4 nanostructures were successfully synthesized and exhibited improved performance, making them a promising candidate for supercapacitor applications.
Review
Chemistry, Physical
Henry Bergmann
Summary: Electrochemical disinfection is increasingly attracting attention due to the growing demand for disinfection of various water, air, and surfaces, with a focus on engineering aspects to research complex systems, risk management, and improve collaboration between researchers and industry.
CURRENT OPINION IN ELECTROCHEMISTRY
(2021)
Article
Chemistry, Applied
M. Manasa, Pranay R. Chandewar, Hari Mahalingam
Summary: Four different boron and cerium doped TiO2 photocatalysts were synthesized by the EDTA-citrate method and studied for degradation of two common fluoroquinolone-based antibiotics under sunlight. The synthesized catalysts showed 90-93% degradation for both antibiotics and demonstrated stability up to three consecutive runs, with e- and OH identified as the dominant species responsible for the photocatalytic activity. These catalysts also showed efficient disinfection capabilities against E.coli under solar light.
Article
Chemistry, Multidisciplinary
Kangmin Lee, Sangwon Shin, Wonhee John Lee, Deokjae Choi, Yongdeok Ahn, Minsoo Park, Daeha Seo, Kwanyong Seo
Summary: A ROS generation system composed of tapered crystalline silicon microwires coated with anatase titanium dioxide was developed for effective sunlight absorption and ROS generation, with H2O2 identified as the dominant species causing cell damage. Surprisingly, only 15 minutes of light exposure on the system can achieve a bactericidal effect comparable to conventional H2O2 levels.
Article
Engineering, Chemical
Kui Yang, Hui Lin, Jin Jiang, Jinxing Ma, Zhifeng Yang
Summary: This study investigates the potential of Bi and Ce elements as substitutes for SnO2-Sb electrodes in electrochemical advanced oxidation processes for water treatment. The results show that SnO2-Bi-REM and SnO2-Ce-REM exhibit higher electrooxidation activity, with SnO2-Bi-REM having a longer service lifespan. Mechanistic studies reveal that SnO2-Bi-REM mainly degrades pollutants through the DET process, while SnO2-Ce-REM relies on reactions with aqueous hydroxyl radicals. Furthermore, SnO2-Bi-REM achieves efficient water purification at a low electrical efficiency.
SEPARATION AND PURIFICATION TECHNOLOGY
(2022)
Article
Energy & Fuels
Ramzi Nasser, Xiao-Lu Wang, Amira Ben Gouider Trabelsi, Fatemah Homoud Alkallas, Habib Elhouichet, Ji-Ming Song
Summary: Hydrothermal and ultrasonic methods were used to successfully prepare Fe-doped NiCo2O4@rGO hybrid heterostructure material, which showed excellent electrochemical properties and is suitable for supercapacitor electrode materials.
JOURNAL OF ENERGY STORAGE
(2022)
Article
Chemistry, Analytical
Saba Rasheed, Ghulam Ali, Rehana Kousar, Muhammad Arslan Raza, Khadija Tul Kubra, Faiza Jan Iftikhar
Summary: Lanthanum (La) doped titania (TiO2)/reduced graphene oxide (RGO) nanocomposites with varying amounts of lanthanum were synthesized as electrode materials for supercapacitors. The nanocomposites were characterized and the effect of lanthanum doping on their electrochemical performance was studied. The 2 wt% La doped TiO2/RGO composite demonstrated the highest specific capacitance of 117.6 F/g at 10 mV/s, as well as better cyclic stability, energy density, and power density compared to other nanocomposites.
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
(2023)
Article
Engineering, Environmental
Xiaoying Lu, Yantao Wang, Junfeng Huang, Ning Han, Hua Li, Zhao Yang, Yong Peng, Xuan Zhang, Cailing Xu
Summary: By combining transition metal doping and defect engineering, the electronic structure of catalysts was tailored to improve electrocatalytic activity for the N-2 reduction reaction. The Re-doped TiO2 nanofibers showed enhanced ammonia yield rate and Faradaic efficiency. Experimental and theoretical results demonstrated the beneficial effects of rhenium doping on the reducibility and conductivity of TiO2, providing a new avenue for designing next-generation electrocatalysts for NRR.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Green & Sustainable Science & Technology
Zhenzi Li, Shijie Wang, Jiaxing Wu, Wei Zhou
Summary: TiO2 nanomaterial photocatalysts have received extensive research interest for energy and environmental applications. The main challenges are the large bandgap and charge-carrier recombination. Recent reports suggest that engineering the defects of TiO2 can enhance photoresponse and promote charge separation efficiency. This review summarizes the synthesis strategies for defective TiO2, especially black TiO2 nanomaterials, and discusses their applications, defect types, characteristics, and photocatalytic mechanism in detail.
RENEWABLE & SUSTAINABLE ENERGY REVIEWS
(2022)
Article
Materials Science, Multidisciplinary
Xiaomin Wang, Jing Pan, Qing Li, Xiaojun Dong, Lei Shi, Sujie Chang
Summary: A MnO2/TiO2 coating with excellent electrochemical performance and corrosion resistance was successfully prepared on metallic porous titanium surfaces using a hydrothermal-based chemical method.
Article
Environmental Sciences
Yaoyao Kang, Junfeng Lian, Yichun Zhu, Zuwen Liu, Wentao Li, Huiyu Dong, Yuanyue Wang, Jinfeng Zeng, Zhimin Qiang
Summary: This study clarified the mechanisms underlying the interactions between H2O2 and DOM during the GAC-based H2O2 quenching process through experimental tests. The results showed that GAC can catalytically decompose H2O2, but DOM inhibits the H2O2 quenching efficiency of GAC through a pore-blocking effect. This study contributes to enhancing understanding of the UV/H2O2-GAC filtration scheme and promoting its application in drinking water treatment.
JOURNAL OF ENVIRONMENTAL SCIENCES
(2023)
Article
Chemistry, Multidisciplinary
Sukhwa Hong, Kahyun Ham, Jeemin Hwang, Sinwoo Kang, Min Ho Seo, Young-Woo Choi, Byungchan Han, Jaeyoung Lee, Kangwoo Cho
Summary: In this study, a highly efficient and stable oxygen evolution reaction (OER) electrocatalyst is developed by using scalable solution casting method to deposit doped nanoparticles on Ni foam. Advanced X-ray absorption spectroscopy and density functional theory calculations reveal the changes in catalytic active sites, providing new insights for precious-metal doped Ni-Fe oxide electrocatalysts.
ADVANCED FUNCTIONAL MATERIALS
(2023)
Article
Engineering, Environmental
Mingizem Gashaw Seid, Aseom Son, Kangwoo Cho, Jeehye Byun, Seok Won Hong
Summary: This study aimed to investigate the structural effect of engineered TiO2 samples on the formation of major nitrosamines during photocatalysis. The nitrogen-containing impurities and leached metal ions from doped-TiO2 samples could exacerbate nitrosamine formation potential. Pre-purification and immobilization of doped-TiO2 samples are suggested to remove a considerable amount of nitrosamines.
Article
Chemistry, Physical
Junhyung Park, Eun Ju Hwang, Sukhwa Hong, Kangwoo Cho
Summary: This study found that coating bismuth-titanium composite oxides on top of iridium-based anodes could enhance the efficiency of the chlorine evolution reaction for chlor-alkali and water treatment. The mechanism and effects of bismuth needed further clarification. Bi x Ti10-xO y heterojunction layers were prepared on an existing iridium-tantalum oxide anode, and various characterizations and electrolysis experiments were performed. The results showed that the outer layer of Bi12TiO20 and β-Bi2O3 could improve the reactivity and selectivity of the chlorine evolution reaction, but the loosely packed and thick overlayers worsened the efficiency and stability.
JOURNAL OF PHYSICAL CHEMISTRY C
(2023)
Article
Nanoscience & Nanotechnology
Evandi Rahman, Jiho Lee, Seung Ji Lim, Aseom Son, Jiyun Han, Kangwoo Cho, Seok Won Hong
Summary: We developed low-cost cathodes for the electrochemical reduction of NO3- in wastewater. By simple reconstruction of stainless steel, we obtained cathodes with superior stability and efficiency, making them suitable for NO3- removal in wastewater treatment.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Chemistry, Physical
Minjeong Kim, Jaemin Choi, Woonghee Lee, Yong-Yoon Ahn, Hangil Lee, Kangwoo Cho, Jaesang Lee
Summary: This study compared hydrogen annealing and cathodic polarization as strategies to fabricate electrically conducting titanium oxides through oxygen non-stoichiometry creation for anodic water treatment. Ti4O7 exhibited higher electrical conductivity and superior performance in chlorine evolution and anodic organic oxidation. Hydroxyl radical primarily contributed to anodic oxidation, and self-doped TiO2 underwent more drastic performance reduction and vulnerability to activity loss and structural damage.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2023)
Article
Engineering, Environmental
Jiyun Han, Subeen Park, Mingizem Gashaw Seid, Byeongho Park, Soo Hyun Lee, Hyung Min Kim, Changha Lee, Jaesang Lee, Jae Hun Kim, Seok Won Hong
Summary: Due to the increase in plastic waste during the COVID-19 pandemic, concerns about microplastic pollution in water environments are growing. In this study, a differential interference contrast (DIC) system was proposed and demonstrated to detect microplastics in aqueous samples. The results showed that this method enables real-time morphological detection and quantification of microplastics down to 200 nm, improving analysis efficiency and size-detection limit.
JOURNAL OF HAZARDOUS MATERIALS
(2023)
Editorial Material
Chemistry, Physical
Kangwoo Cho, Wonyong Choi, Detlef Bahnemann
JOURNAL OF PHYSICAL CHEMISTRY A
(2023)
Editorial Material
Chemistry, Physical
Kangwoo Cho, Wonyong Choi, Detlef Bahnemann
JOURNAL OF PHYSICAL CHEMISTRY A
(2023)
Article
Engineering, Environmental
Sung Ho Chae, Seung Ji Lim, Mingizem Gashaw Seid, Wondesen Workneh Ejerssa, Aseom Son, Heejong Son, Sangki Choi, Woongbae Lee, Yunho Lee, Seok Won Hong
Summary: This study aimed to implement a comprehensive prediction model for the fate of micropollutants in wastewater treatment plants (WWTPs). Through monitoring five WWTPs in South Korea, it was found that the majority of micropollutants were effectively removed by biological treatment processes. Furthermore, the prediction model was improved by optimizing the biodegradation rate constants of each micropollutant, resulting in more accurate predictions of actual data.
Article
Nanoscience & Nanotechnology
Evandi Rahman, Sukhwa Hong, Jaesang Lee, Seok Won Hong, Kangwoo Cho
Summary: This study reports a Ni0.33Fe0.67Oy/TiO2 heterojunction anode prepared by sol-gel coating and thermal decomposition, which showed comparable ClER efficiency to benchmarking Ir7Ta3Oy/TiO2 in neutral NaCl solutions. The outer TiO2 was identified as the active ClER center. Ni0.33Fe0.67Oy exhibited superior OER activity compared to other Fe-doped Ni oxides, indicating its potential as an ohmic contact for ClER.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Chemistry, Physical
Seok Kim, Seokhyun Choung, Woonghee Lee, Sungho Bae, Jeong Woo Han, Kangwoo Cho
Summary: This study demonstrates a heterojunction strategy to tune the activity and selectivity of a Ni-Sb-SnO2 (NSS) anode in the electrochemical ozone evolution reaction (OZER). By optimizing the loading of SiOx, NSS/SiOx exhibits improved current efficiency and retarded oxygen evolution in OZER.
JOURNAL OF MATERIALS CHEMISTRY A
(2022)
Article
Chemistry, Physical
Bolun Yu, Denan Li, Qianqian Zhu, Shufan Yao, Lifeng Zhang, Yanshuo Li, Zhenxin Zhang
Summary: This study successfully improved the catalytic activity of a zeolitic octahedral metal oxide by incorporating a single zinc species into its micropore. The zinc incorporation achieved a high ethane conversion rate and ethylene selectivity. Mechanism study showed that the isolated zinc site played a crucial role in activating oxygen and ethane, as well as stabilizing intermediates and transition states.
APPLIED CATALYSIS B-ENVIRONMENT AND ENERGY
(2024)
Article
Chemistry, Physical
Ruoqi Liu, Hao Fei, Jian Wang, Ting Guo, Fangyang Liu, Zhuangzhi Wu, Dezhi Wang
Summary: This work successfully synthesized a high-performing S-enriched MoS2 catalyst for electrocatalytic nitrogen reduction reaction (NRR), demonstrating high activity and selectivity. The synergistic effect of the 1T phase and bridging S22- species was shown to play a positive role in NRR performances, and DFT calculations revealed the mechanism behind the improved performance.
APPLIED CATALYSIS B-ENVIRONMENT AND ENERGY
(2024)
Article
Chemistry, Physical
Pan Xia, Lele Zhao, Xi Chen, Zhihong Ye, Zhihong Zheng, Qiang He, Ignasi Sires
Summary: This study presents a modified gas-diffusion electrode (GDE) for highly efficient and stable H2O2 electrosynthesis by using trace polymethylhydrosiloxane (PMHS). DFT calculations provide an in-depth understanding of the roles of PMHS functional groups.
APPLIED CATALYSIS B-ENVIRONMENT AND ENERGY
(2024)
Article
Chemistry, Physical
Kwangchol Ri, Songsik Pak, Dunyu Sun, Qiang Zhong, Shaogui Yang, Songil Sin, Leliang Wu, Yue Sun, Hui Cao, Chunxiao Han, Chenmin Xu, Yazi Liu, Huan He, Shiyin Li, Cheng Sun
Summary: Different B-doped rGO catalysts were synthesized and their 2e- oxygen reduction reaction (ORR) performance was investigated. It was found that the 2e- ORR selectivity of B-doped rGO was influenced by the B content and oxygen mass transfer conditions. The synthesized catalyst exhibited high 2e- ORR selectivity and was capable of degrading organic pollutants continuously.
APPLIED CATALYSIS B-ENVIRONMENT AND ENERGY
(2024)
Article
Chemistry, Physical
Li Lv, Lin Lei, Qi-Wen Chen, Cheng-Li Yin, Huiqing Fan, Jian-Ping Zhou
Summary: Monoclinic phase La2Ti2O7 and orthorhombic phase Bi4Ti3O12 are widely used in photocatalysis due to their layered crystal structure. The electronic structures of these phases play a crucial role in their photocatalytic activity. Heat treatment in a nitrogen atmosphere introduces more oxygen vacancies into the S-scheme heterojunction, leading to enhanced NO removal efficiency.
APPLIED CATALYSIS B-ENVIRONMENT AND ENERGY
(2024)
Article
Chemistry, Physical
Choe Earn Choong, Minhee Kim, Jun Sup Lim, Young June Hong, Geon Joon Lee, Keun Hwa Chae, In Wook Nah, Yeomin Yoon, Eun Ha Choi, Min Jang
Summary: In this study, the synergistic effect between argon-plasma-system (AP) and catalysts in promoting the production of reactive species for water remediation was investigated. By altering the oxygen vacancies concentration of CeO2/Bi2O3 catalyst, the production of hydrated electrons was stimulated for PFOA removal. The results showed that the built-in electric field in the Bi/Ce0.43 interface enhanced electron migration and eaq- generation, leading to improved PFOA removal efficiency.
APPLIED CATALYSIS B-ENVIRONMENT AND ENERGY
(2024)
Article
Chemistry, Physical
Yushan Wu, Di Xu, Yanfei Xu, Xin Tian, Mingyue Ding
Summary: Efficient synthesis of primary amines from carbonyl compounds was achieved via reductive amination using Ru@NC-Al2O3 as a catalyst, exhibiting high activity and selectivity under mild conditions.
APPLIED CATALYSIS B-ENVIRONMENT AND ENERGY
(2024)
Article
Chemistry, Physical
Yilan Jiang, Peifang Wang, Tingyue Chen, Keyi Gao, Yiran Xiong, Yin Lu, Dionysios D. Dionysiou, Dawei Wang
Summary: By controlling the content of Co and Ni in Co1-xNixFe2O4, the production of O-1(2) from H2O2 can be regulated. NiFe2O4, with the lowest lattice distortion degree, can efficiently produce O-1(2) as the dominant reactive oxygen species. The system also exhibits significant resistance to water matrix interference.
APPLIED CATALYSIS B-ENVIRONMENT AND ENERGY
(2024)
Article
Chemistry, Physical
Shuai Feng, Donglian Li, Hao Dong, Song Xie, Yaping Miao, Xuming Zhang, Biao Gao, Paul K. Chu, Xiang Peng
Summary: In this study, MoO2/Mo2N heterostructures were prepared by regulating the coordination of Mo atoms. The electrocatalyst exhibits high current density and excellent stability for hydrogen evolution reaction.
APPLIED CATALYSIS B-ENVIRONMENT AND ENERGY
(2024)
Article
Chemistry, Physical
Jia-Cheng E. Yang, Min -Ping Zhu, Daqin Guan, Baoling Yuan, Darren Delai Sun, Chenghua Sun, Ming-Lai Fu
Summary: This study successfully modulated the electron configuration and spin state of millimetric metal catalysts by adjusting the support curvature radius. The electronic structure-oriented spin catalysis was found to affect the degradation of pollutants, providing new insights for the design and production of highly active, reusable, and stable catalysts.
APPLIED CATALYSIS B-ENVIRONMENT AND ENERGY
(2024)
Article
Chemistry, Physical
Tao Zhong, Su Tang, Wenbin Huang, Wei Liu, Huinan Zhao, Lingling Hu, Shuanghong Tian, Chun He
Summary: In this study, a highly efficient photocatalyst for the elimination of CH3SH was developed by engineering different crystal facets and coupling them with PHI. Cu (111)/PHI exhibited the highest elimination efficiency and showed good stability and reusability. The enhanced surface electron pump effect and effective adsorption mechanisms were revealed through comprehensive characterizations and DFT calculations.
APPLIED CATALYSIS B-ENVIRONMENT AND ENERGY
(2024)
Article
Chemistry, Physical
Feifei Yang, Tianyu Zhang, Jiankang Zhao, Wei Zhou, Nicole J. Libretto, Jeffrey T. Miller
Summary: A Ni3Sn intermetallic nano particle was found to have geometrically isolated Ni sites that could selectively cleave C-O bonds in biomass derivatives. This nano particle showed high activity and selectivity towards 2-methylfuran, unlike Ni nanoparticles that produced other unwanted products derived from the aromatic rings.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2024)
Article
Chemistry, Physical
Lulu Qiao, Di Liu, Anquan Zhu, Jinxian Feng, Pengfei Zhou, Chunfa Liu, Kar Wei Ng, Hui Pan
Summary: This study reveals that surface evolution plays a crucial role in enhancing the electrocatalytic performance of transition metal oxides for electrochemical nitrate reduction reaction (e-NO3RR). Incorporating nickel into Co3O4 can promote surface reconstruction and improve the adsorption of intermediates and reduce energy barriers, leading to enhanced catalytic performance. The reconstructed cobalt-nickel hydroxides (CoyNi1_y(OH)2) on the catalyst's surface serve as the active phase.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2024)
Article
Chemistry, Physical
Xinyu Song, Yang Shi, Zelin Wu, Bingkun Huang, Xinhao Wang, Heng Zhang, Peng Zhou, Wen Liu, Zhicheng Pan, Zhaokun Xiong, Bo Lai
Summary: This study explores the discriminative activities and mechanisms for activation of O-O bond in peroxy compounds via single-atom catalysts (SACs) with higher coordination numbers (M-N5). The atomic catalyst (Fe-SAC) with Fe-N5 as the active center was constructed, effectively activating peroxymonosulfate (PMS), peroxydisulfate (PDS), and hydrogen peroxide (H2O2). The study demonstrates the degradation efficiencies of acyclovir are related to the O-O bond length in different peroxy compounds, and reveals the discriminative mechanisms for activation of O-O bond in different Fenton-like systems.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2024)
Article
Chemistry, Physical
Yangzhuo He, Hong Qin, Ziwei Wang, Han Wang, Yuan Zhu, Chengyun Zhou, Ying Zeng, Yicheng Li, Piao Xu, Guangming Zeng
Summary: A dual-metal-organic framework (MOF) assisted strategy was proposed to construct a magnetic Fe-Mn oxycarbide anchored on N-doped carbon for peroxymonosulfate (PMS) activation. The FeMn@NC-800 catalyst exhibited superior activity with almost 100% degradation of sulfamethazine (SMZ) in 30 minutes. The study provided insights for the rational design of high-performance heterogeneous catalysts and proposed a novel nonradical-based catalytic oxidation for environmental cleaning.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2024)