Article
Chemistry, Physical
Mohamed Shaker S. Adam, M. M. Makhlouf, Farman Ullah, Omar M. El-Hady
Summary: The research synthesized three novel mononuclear complexes of Ni2+, Cu2+, and VO2+ ions using di-basic tridentate nicotinohydazone ligand and investigated their catalytic potential in 1,2-cyclooctene epoxidation. The study showed that the high valent metal ion (V4+) catalyst had slightly better catalytic potential than the low valent metal ions (Ni2+ and Cu2+) complex catalysts.
JOURNAL OF MOLECULAR LIQUIDS
(2021)
Article
Chemistry, Physical
Weijun Dou, Junsheng Liu, Meng Li
Summary: The study synthesized graphene oxide-based hybrid membranes and characterized their performance properties, particularly focusing on the competitive adsorption of Cu2+ in mixed multi-metal solution. The results showed that the hybrid membranes exhibited good selectivity and adsorption efficiency for metal ions, suggesting potential applications in metal separation and recycle.
JOURNAL OF MOLECULAR LIQUIDS
(2021)
Article
Engineering, Chemical
Hajar Merrikhpour, Sara Mobarakpour, Seyedeh Bahareh Azimi
Summary: This study investigates the adsorption capacity of modified bentonite for heavy metal ions in water. The results show that SDS modified bentonite can enhance the adsorption capacity of the natural adsorbents, with the best performance observed at 40 mM.
DESALINATION AND WATER TREATMENT
(2022)
Article
Chemistry, Applied
Faezeh Farzaneh, Zahra Ahmadi, Zahra Azarkamanzad, Maryam Ghahremani
Summary: VO(acac)(2) and VO(Salen) complexes were immobilized on ethylenediamine-modified graphene oxide and exhibited promising epoxidation performance with high conversion and selectivity. The immobilized complexes showed good recyclability and maintained catalytic activity for multiple runs, indicating their potential practical application.
APPLIED ORGANOMETALLIC CHEMISTRY
(2021)
Article
Engineering, Chemical
Liwen Zheng, Yongchao Gao, Jianhua Du, Wen Zhang, Yujie Huang, Qingqing Zhao, Luchun Duan, Yanju Liu, Ravi Naidu, Xiangliang Pan
Summary: The chitosan-EDTA modified magnetic biochar (E-CMBC) showed good adsorption performance in removing heavy metals, effectively eliminating Cd2+, Cu2+, and Ni2+ in both single and binary systems. Competitive adsorption behavior was largely influenced by heavy metal concentration and affinity for the adsorption sites on E-CMBC.
Article
Chemistry, Multidisciplinary
Sauvik Chatterjee, Surajit Das, Piyali Bhanja, E. S. Erakulan, Ranjit Thapa, Santu Ruidas, Sayantan Chongdar, Suman Ray, Asim Bhaumik
Summary: This research involves the synthesis of a new crystalline porous organosilica material TSOS-1, which has been used as a support for stabilizing tiny AgNPs to obtain a robust nanocatalyst Ag@TSOS-1 for the conversion of styrene into predominantly styrene oxide (SO) using CO2 as a soft oxidant in an autoclave reactor under mild reaction conditions.
JOURNAL OF CO2 UTILIZATION
(2022)
Article
Chemistry, Multidisciplinary
Shuisheng Wu, Donghui Lan, Nianyuan Tan, Ran Wang, Chak-Tong Au, Bing Yi
Summary: Salen Mn-GO prepared by immobilizing metal complexes on graphene oxide shows excellent catalytic activity and reusability for styrene epoxidation. The study investigates the effects of various factors on the catalyst performance and discusses the preliminary mechanism of the epoxidation reaction catalyzed by Salen Mn-GO.
JOURNAL OF THE CHEMICAL SOCIETY OF PAKISTAN
(2021)
Article
Chemistry, Multidisciplinary
Chinna Ayya Swamy Pothulapadu, Anjitha Jayaraj, N. Swathi, Ragam N. Priyanka, Gandhi Sivaraman
Summary: Metal ions play a crucial role in environmental and biological applications, with a focus on detecting specific ions at minute levels. Benzothiazole-based chemosensors have been designed and synthesized for highly selective and sensitive detection of biologically important metal ions like Zn2+, Cu2+, and Ni2+. The sensors exhibit ratiometric and colorimetric responses to the target ions, making them valuable tools for bioimaging and environmental monitoring.
Article
Chemistry, Physical
A. K. Khedr, R. R. Zaky, E. A. Gomaa, M. N. Abd El-Hady
Summary: A series of transition metal complexes were prepared using a novel ligand and various metal cations, and their structures, properties, and biological activities were extensively studied.
JOURNAL OF MOLECULAR LIQUIDS
(2022)
Article
Materials Science, Multidisciplinary
Lohit Naik, C. Maridevarmath, M. S. Thippeswamy, Hemantkumar M. Savanur, Imtiyaz Ahamed M. Khazi, G. H. Malimath
Summary: In this study, a newly synthesized chemosensor TTO was characterized for detecting Fe2+, Ni2+, and Cu2+ metal ions. The results showed high selectivity, sensitivity, and potential for quantitative measurement of the targeted metal ions. The TTO can be a promising chemosensor for future metal ion detection applications.
MATERIALS CHEMISTRY AND PHYSICS
(2021)
Article
Spectroscopy
Thanayada Nantapon, Phiphob Naweephattana, Panida Surawatanawong, Phoonthawee Saetear, Teera Chantarojsiri, Nopporn Ruangsupapichat
Summary: New chemosensors, L1-L3, based on the coumarin Schiff base scaffold with substituent modifications, have been designed and synthesized. These chemosensors demonstrated the ability to discriminate Co2+, Ni2+, and Cu2+ ions through absorbance and fluorescence spectral changes. Furthermore, the slight modification of substituents on L2 and L3 enabled them to selectively bind to specific ions, suggesting their potential applications in water quality detection.
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
(2022)
Article
Chemistry, Applied
Mehdi Hatefi Ardakani, Maryam Aliavazi
Summary: In this study, a new Ni(II) unsymmetrical Schiff-base complex was successfully synthesized and immobilized into three-dimensional mesoporous silica KIT-6. The resulting composite was used to selectively oxidize different aromatic and aliphatic sulfides. The catalyst showed good stability and could be reused multiple times.
JOURNAL OF POROUS MATERIALS
(2023)
Article
Environmental Sciences
Daouda Kouotou, Mohammed Ghalit, Julius Nsami Ndi, Luisa M. Pastrana Martinez, Meriam El Ouahabi, Joseph Mbadcam Ketcha, El Khadir Gharibi
Summary: Activated carbon prepared from palm kernel shell doped with CeO2 was used to remove Pb2+, Cd2+, Ni2+, and Cu2+ metal ions, showing that adsorption efficiency is related to the ionic radii of metal ions. The rate constants of pseudo-second-order model and intraparticle diffusion varied with the increase of hydrated cation radii, while the Freundlich isotherm model fit the experimental data well for all the metallic ions.
ENVIRONMENTAL MONITORING AND ASSESSMENT
(2021)
Article
Chemistry, Physical
Ganesh Sunil More, Atal Shivhare, Surinder Pal Kaur, T. J. Dhilip Kumar, Rajendra Srivastava
Summary: CuFe2O4 inverse spinel catalysts were found to selectively hydrogenate furfural into 2-methylfuran with high selectivity. These results are important for the development of environmentally friendly catalysts.
CATALYSIS SCIENCE & TECHNOLOGY
(2022)
Article
Multidisciplinary Sciences
Behrooz Maleki, Reza Sandaroos, Sahar Peiman
Summary: Six catalysts MnL1-MnL6, containing two crown ether rings and their analogs supported on the MCM-41 heterogeneous substrate (MnL1@MCM41-MnL5@MCM41), were synthesized and characterized. The mixture of molecular oxygen as an oxidant and these catalysts were used for the epoxidation of styrene. The supported catalysts showed better performance compared to the unsupported analogs, and they did not require an axial base and reducing agent.
Article
Chemistry, Physical
Liyuan Xiao, Jingyi Han, Zhenlu Wang, Jingqi Guan
Summary: NixFe-BDC nanorods with different Ni/Fe ratios were prepared by a solvothermal method for the OER. The optimal Ni3Fe-BDC displayed a low overpotential and excellent stability in 1 M KOH and 1 M NaCl mixture. Fe3+ improved the charge transfer rate and affected the specific surface area of the catalyst, while both Fe and Ni sites acted as active centers for reducing the reaction kinetic energy barrier. The rod-like Ni3FeOOH formed in situ was identified as the active site for the OER.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2023)
Article
Chemistry, Physical
Jingyi Han, Xiaodi Niu, Jingqi Guan
Summary: This study reports ultrafine iron (oxy)hydroxide nanoparticles supported on oleum-treated graphite, providing abundant active sites for the oxygen evolution reaction (OER). The optimal catalyst exhibits high electrocatalytic OER activity and excellent stability due to its stronger charge transfer ability and lower OER energy barrier. This work demonstrates the improvement of OER performance in oxyhydroxide-based electrocatalysts through surface defect engineering.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2023)
Article
Biochemistry & Molecular Biology
Yuanyuan Ma, Wanting Liu, Zhifang Li, Yuhang Sun, Mingyuan Shi, Zheng Nan, Ruotong Song, Liying Wang, Jingqi Guan
Summary: In this study, a series of Mn-Fe/TS-1 catalysts were synthesized using the one-pot hydrothermal method, with the introduction of TEPA. The optimized Mn-Fe/TS-1(R-2) catalyst showed remarkable NH3-SCR performance and excellent resistance to H2O and SO2 at low temperatures. Characterization results revealed that Mn-Fe/TS-1(R-2) possessed abundant surface Mn4+ and Fe2+, as well as chemisorbed oxygen, strong reducibility, and a high Bronsted acid amount. In comparison, Mn-Fe/TiO2 displayed a narrower active temperature window due to its poor thermostability.
Review
Chemistry, Physical
Ting Zhang, Jianrui Sun, Jingqi Guan
Summary: This article reviews the research progress of self-supported transition metal chalcogenides (including sulfides, selenides, and tellurides) for the oxygen evolution reaction (OER). The basic principle, evaluation parameters, preparation methods, and optimization strategies of these electrocatalysts are systematically summarized. The challenges and prospects of developing more promising self-supported chalcogenide electrocatalysts are also proposed.
Review
Chemistry, Inorganic & Nuclear
Jingyi Han, Jingqi Guan
Summary: With the vigorous development of nanozymes in recent years, single-site nanozymes (SSNs) with maximum atomic utilization of 100% have become a popular research frontier in various fields due to their tremendous advantages in both catalytic activity and selectivity. Fe-based SSNs have gained significant attention in biomedicine due to their high abundance, similar coordination structure to natural bioenzymes, and superior therapeutic effects through the Fenton response. This review summarizes the characterization, synthesis methods, biochemical action mechanism, in vivo pharmacokinetics, and recent biomedical research and applications of Fe-based SSNs, with a concise perspective on the future challenges for their development in biomedicine.
COORDINATION CHEMISTRY REVIEWS
(2023)
Review
Chemistry, Applied
Jingru Sun, Zhenlu Wang, Jingqi Guan
Summary: Electrochemical sensors and biosensors are important in various fields, and traditional sensors are not sufficient for accurate and quantitative sensing. Single-atom nanozymes (SANs) have been successfully used in electrochemical sensors due to their high electrochemical activity, stability, selectivity, and sensitivity.
Article
Engineering, Environmental
Hongsu Wang, Fengling Wu, Lifang Wu, Jingqi Guan, Xiaodi Niu
Summary: Scientists have developed a ternary channel colorimetric sensor array to detect multiple sulfur-containing metal salts simultaneously. The sensor array can discriminate different concentrations of these salts and has been successfully applied to detect real samples. They also propose a smartphone-based autonomous detection platform with a wide linear range and low detection limit.
JOURNAL OF HAZARDOUS MATERIALS
(2023)
Article
Chemistry, Physical
Xue Bai, Jingyi Han, Xiaodi Niu, Jingqi Guan
Summary: Developing transition metal-nitrogen-carbon materials (M-N-C) as electrocatalysts for the oxygen evolution reaction (OER) is important for low-cost energy conversion systems. This study synthesizes a single-Mn-atom catalyst based on carbon skeleton (Mn-1-N2S2CX) with isolated Mn-N2S2 sites, which exhibits high alkaline OER activity, low Tafel slope, and excellent stability. Theoretical calculations reveal the pivotal function of isolated Mn-N2S2 sites in promoting OER.
Review
Chemistry, Physical
Tianmi Tang, Zhenlu Wang, Jingqi Guan
Summary: The uncontrolled exploitation of fossil fuels has caused energy crises and environmental problems, threatening sustainable development. Therefore, finding renewable energy sources and reducing CO2 emissions is crucial. Electrocatalytic CO2 reduction is an effective strategy, but it is complex and requires the development of cheap and efficient catalysts. Atomically dispersed M-N-C materials show promise as CO2RR catalysts, with adjustable properties and high selectivity. Regulating the electronic structure of M-N-C materials and designing catalysts to inhibit competitive reactions are important for enhancing CO2RR performance.
ACTA PHYSICO-CHIMICA SINICA
(2023)
Review
Chemistry, Applied
Jingyi Han, Jingqi Guan
Summary: Due to their excellent catalytic activity and high atomic utilization rate, single atom catalysts (SACs) have emerged as a promising player in the field of nanocatalytic medicine. Heteronuclear dual-atom catalysts (HDACs) retain the advantages of SACs while offering more flexibility in coordination environment and synergistic effects between different active sites, making them ideal candidates for catalytic tumor therapy. This review presents advanced characterization methods of HDACs, classifies and elaborates their applications in various fields based on different preparation strategies, and emphasizes their application in nanocatalytic tumor therapy. Lastly, a concise summary and future prospects are provided to highlight the current challenges and potential of HDACs for oncology therapy.
CHINESE JOURNAL OF CATALYSIS
(2023)
Article
Chemistry, Applied
Tianmi Tang, Yin Wang, Jingyi Han, Qiaoqiao Zhang, Xue Bai, Xiaodi Niu, Zhenlu Wang, Jingqi Guan
Summary: In this study, a novel dual-atom catalyst named CoFe-NG was synthesized, which exhibited remarkable catalytic performance in the oxygen reduction reaction. It showed higher endurance to methanol/carbon monoxide poisoning and better durability than commercial Pt/C. The assembled Zn-air battery with CoFe-NG as the air electrode delivered a peak power density of 230 mW cm-2 and exhibited negligible change in output voltage at 5 mA cm-2 for 250 h. Theoretical calculations revealed the lower ORR barrier of FeN3-CoN3 sites on N-doped graphene compared to FeN4 and CoN4 sites.
CHINESE JOURNAL OF CATALYSIS
(2023)
Review
Chemistry, Physical
Xue Bai, Jingqi Guan
Summary: Single-atom catalysts (SACs) are composed of isolated metal sites on a stable support, which exhibit high catalytic activity and selectivity. MXenes, such as metallic carbides, nitrides, or carbonic nitrides, are suitable carriers for supporting isolated single-metal atoms due to their large surface area and electron tunability. This article first introduces the advanced synthesis and characterization methods for MXene-based SACs. Three strategies for preventing the aggregation of single-metal atoms, including adsorption at functional groups, anchoring at metal vacancies, and anchoring at surface terminating group vacancies, are discussed. The applications of MXene-based SACs in electrocatalysis, energy storage, and sensors are comprehensively reviewed. Finally, the current challenges and prospects of MXene-based SACs are presented.
Review
Chemistry, Multidisciplinary
Liyuan Xiao, Zhenlu Wang, Jingqi Guan
Summary: This paper provides a detailed review of the topological structure design and synthesis methods of covalent organic frameworks (COFs), and analyzes their design principles. It also summarizes the applications of COFs and their derivatives in the field of electrocatalysis, and proposes optimization strategies. Finally, it explores the application prospects and challenges of COFs and their derivatives in electrocatalysis, providing guidance for future research.
ADVANCED FUNCTIONAL MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Mingyuan Shi, Tianmi Tang, Liyuan Xiao, Jingyi Han, Xue Bai, Yuhang Sun, Yuanyuan Ma, Jingqi Guan
Summary: In this study, Co-doped FeNiOOH rosette-like nanoflowers with different Co dosages were prepared on nickel foam using a one-step solvothermal method. The oxygen evolution reaction (OER) performance of the Co-doped FeNiOOH nanoflowers in seawater electrolysis was investigated. The results showed that the Co-doped material exhibited low overpotential and small Tafel slope in alkaline solution. In situ Raman results indicated that NiOOH and γ-FeOOH were the key active species for the reaction.
CHEMICAL COMMUNICATIONS
(2023)
Review
Chemistry, Multidisciplinary
Liyuan Xiao, Zhenlu Wang, Jingqi Guan
Summary: This review summarizes the advantages, design ideas, and optimization strategies of high-entropy alloys (HEAs) in electrocatalysis. The high activity and stability of HEAs are explored in depth, and efficient strategies for optimizing catalysts are provided. The challenges that HEAs may face in the future are also pointed out.