Article
Chemistry, Physical
Syane A. Satyawirawan, Robert W. Cattrall, Spas D. Kolev, Ines G. S. Almeida
Summary: This study investigated the solvent extraction of Co(II) from aqueous solutions using the ionic liquids [P66614][C272] and [P66614][SCN]. The results showed that the cation of the ionic liquids participated in the formation of ion-pairs in the organic phase, maintaining electroneutrality. The Co(II) coordination sphere geometry was tetrahedral, and the stoichiometric mole ratios between the ionic liquids and Co(II) were determined. The extraction of Co(II) was enhanced when the aqueous phase contained an anion with high lipophilicity.
JOURNAL OF MOLECULAR LIQUIDS
(2023)
Article
Engineering, Environmental
Hongju Lin, Yanchang Chu, Mingyu Xie, Le Yang, Gangfeng Ouyang
Summary: In this study, a series of nickel-based bimetallic catalysts supported on homemade SiO2 nanospheres were investigated for the decarboxylation of fatty acids. The NiCo/SiO2 catalyst showed the best performance, achieving high conversion and selectivity. The synergy between Ni and Co and the carbon resistance properties of homemade SiO2 contributed to the efficient decarboxylation reaction. The NiCo/SiO2 catalyst was also successfully applied for the upgrading of MS HTL bio-crude, resulting in a significant improvement in the theoretical higher heating value (HHV), indicating the potential for converting MS bio-crude to biofuels.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2023)
Article
Engineering, Chemical
G. Pahla, F. Ntuli, N. Magwa
Summary: This study investigated novel conditions for the treatment of secondary leach liquor streams from Base Metal Refineries in order to selectively recover valuable cobalt and nickel. The optimized process successfully isolated cobalt and nickel, demonstrating the potential for further research and implementation.
MINERALS ENGINEERING
(2022)
Article
Chemistry, Physical
Badr A. Mahmoud, Abdulmajid A. Mirghni, Kabir O. Oyedotun, Oladepo Fasakin, Ncholu Manyala
Summary: The NH4(NiCo)PO4•H2O/GF composite exhibited improved electrochemical performance in hybrid supercapacitors, with higher specific capacity and specific energy. The device showed high columbic efficiency and self-discharge efficiency in long-term stability tests.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Chemistry, Physical
Shaokang Wang, Hang Xu
Summary: The di-[EMIM]Cl intermediate was synthesized and reacted with cobalt chloride to prepare a bi-[EMIM]CoCl3 ionic liquid catalyst. This catalyst, coupled with oxone, effectively removed sulfur-containing organics in octane. The optimal dosages of di-[EMIM]CoCl3, oxone, and [BMIM]BF4 extractant were determined, and the sulfur removal mechanism was discussed.
Article
Energy & Fuels
Moo Young Jung, Hyobeen Cho, Chanyong Lee, Yong Ju Yun, Suresh Kannan Balasingam, Yongseok Jun
Summary: The development of high energy density supercapacitors is crucial for addressing environmental pollution concerns and meeting the demand for energy storage systems. This study presents hybrid electrodes composed of cobalt phosphide (CoP) and nickel phosphide (NiP) materials on nickel foam (NF), demonstrating improved energy density and specific capacitance compared to individual electrodes. The asymmetric supercapacitor (ASC) based on NiP/CoP@NF electrode exhibits excellent energy density and long-term stability, outperforming previously reported NiCoP-based ASCs.
JOURNAL OF ENERGY STORAGE
(2023)
Article
Nanoscience & Nanotechnology
Yanxia Liu, Zhangmin Tian, Qiuchen Xu, Yaxiong Yang, Yiteng Zheng, Hongge Pan, Jian Chen, Zhen Wang, Wenjun Zheng
Summary: This research reports a new noble metal-free electrocatalyst Co0.6Ni0.4Se2-LN, which exhibits abundant active sites and hierarchical structure, leading to efficient hydrogen evolution at low over-potential and small Tafel slope.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Article
Energy & Fuels
Yujia Liang, Jiyu Cai, Donghao Liu, Zonghai Chen
Summary: This study presents a simple and effective mechanochemical method for coating LLZO on the NMC particle surface, resulting in a coated cathode with superior electrochemical performance compared to the pristine NMC cathode.
Article
Chemistry, Multidisciplinary
Dennis Zywitzki, Raoul Schaper, Engin Ciftyuerek, Jan-Lucas Wree, Dereje H. Taffa, Daniel M. Baier, Detlef Rogalla, Yujiao Li, Michael Meischein, Alfred Ludwig, Zheshen Li, Klaus Schierbaum, Michael Wark, Anjana Devi
Summary: Transition metal ferrites (such as CFO and NFO) have gained attention as potential materials for supercapacitors, with CVD processes offering advantages in producing high-quality, uniform, and dense ferrite films. Electrodes deposited on conducting substrates exhibit pseudocapacitive behavior, with high interfacial capacitances.
ADVANCED MATERIALS INTERFACES
(2021)
Article
Engineering, Environmental
Hang Xu, Anqi Niu, Zihan Shang, Geng Li, Fengmin Wu, Xuefeng Wei, Jun Zhang
Summary: A heterogeneous catalyst with superparamagnetic properties and a multi-porous structure was prepared for efficient desulfurization of oil when coupled with peroxymonosulfate. The catalyst exhibited high desulfurization activity at a low temperature and maintained stability after multiple uses. The study also revealed the reaction mechanism of desulfurization.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Engineering, Environmental
Man Wang, Qiang Liu, Juan Yang, Kai Jiang, Siyu Liu, Xiaogang Che, Qingsong Weng, Junxiong Wu, Dongmei Lin, Jieshan Qiu, Guohua Chen
Summary: This study reports a new approach to coat poly(3,4-ethylenedioxythiophene) (PEDOT) skin with a controlled thickness on nickel-cobalt layered double hydroxide (NiCo-LDH) nanosheets via oxidative chemical vapor deposition (oCVD). The conductive PEDOT skin allows for uniform distribution of electrical potential and fast ion transport. The resulting NiCo-LDH nanosheets with a 10 nm thick PEDOT skin exhibit high specific capacity, improved rate capability, and cycling stability, demonstrating the potential of this interface engineering strategy for aqueous energy-storage devices.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Chemistry, Physical
Ihtisham Ul Haq, Bhajan Lal, Dzulkarnain B. Zaini
Summary: The thermodynamic hydrate inhibition behavior of two ammonium based ionic liquids (AIL) and their mixtures with methanol for CO2 hydrates was studied. The results show that TMABF(4) and TMABF(4) + methanol exhibit higher thermodynamic hydrate inhibition effect compared to TEABF(4), indicating their potential application in flow assurance.
JOURNAL OF MOLECULAR LIQUIDS
(2022)
Article
Chemistry, Physical
O. Kazarina, V. N. Agieienko, R. N. Nagrimanov, M. E. Atlaskina, A. N. Petukhov, A. A. Moskvichev, A. Nyuchev, A. Barykin, I. V. Vorotyntsev
Summary: In this study, a rational strategy for high-yield solvent free synthesis of alkylammonium halides was described, resulting in the successful synthesis of hydroxyl-functionalized solid ionic compounds and novel room temperature ionic liquids. The properties of these compounds were characterized, including density, viscosity, and refractive index, with NH3 absorption capacity of the ILs showing correlation with their fractional free volumes. Additionally, IL-5 exhibited double the absorption capacity compared to IL-4, attributed to the presence of an additional hydroxyl group.
JOURNAL OF MOLECULAR LIQUIDS
(2021)
Article
Chemistry, Physical
Beata Pospiech
Summary: The selective extraction of metals from aqueous solutions is crucial in the hydrometallurgical processing of metallic waste. This study investigated the membrane separation of iron(III) from nickel(II), cobalt(II), and lithium(I) using polymer inclusion membranes (PIMs) with tetrabutylammonium bromide (TBAB) as an ion carrier. Various factors, including the ion carrier concentration and the inorganic acid concentration, were analyzed to understand their effects on the kinetic parameters. The results demonstrated the high selectivity of the ionic liquid TBAB as an ion carrier for Fe(III) over Ni(II), Co(II), and Li(I).
Article
Chemistry, Analytical
Ming Zhang, Yixuan Wang, Xinli Guo, Rui Li, Zhengbin Peng, Weijie Zhang, Yanmei Zheng, Hang Xie, Yao Zhang, Yuhong Zhao
Summary: A NCH nanosheets/graphene/nickel foam composite electrode prepared by CVD and hydrothermal process showed significantly enhanced specific capacitance and rate performance, providing a new approach for improving the performance of NCH electrode in supercapacitor applications.
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
(2021)
Article
Chemistry, Analytical
Michelle Buoso, Beatrice Campanella, Massimo Onor, Emanuela Pitzalis, Alessandro D'Ulivo
Summary: The use of BH intermediates as derivatization reagents significantly improves the tolerance to interference from transition metal ions in the generation of SbH3 and BiH3, and shows high tolerance in a wide range of acidity. The method has been successfully applied to the determination of Sb and Bi in complex samples, providing further understanding of the chemical behavior of borohydrides.
JOURNAL OF ANALYTICAL ATOMIC SPECTROMETRY
(2024)
Article
Chemistry, Analytical
Chao-Feng Li, Xuan-Ce Wang, Zhu-Yin Chu, Peng Peng
Summary: Thermal ionization mass spectrometry (TIMS) is the standard method for obtaining precise Sr-87/Sr-86 isotopic ratios. However, our developed hydrofluoric acid coprecipitation method offers a low-cost, rapid, simple, and high-throughput alternative for analyzing red wine samples, effectively eliminating isobaric interference and matrix element inhibition.
JOURNAL OF ANALYTICAL ATOMIC SPECTROMETRY
(2024)
Article
Chemistry, Analytical
Ivan B. Krstic, Bratislav M. Obradovic, Milorad M. Kuraica
Summary: This paper presents the spatio-temporal dynamics of a Grimm-type microsecond pulsed glow discharge (mu PGD) in argon at 6 mbar. The occurrence of a high current peak during the discharge ignition is analyzed and the importance of displacement current is emphasized. The development of electron excitation temperature for argon atoms and ions at various distances from the cathode is measured. The spatio-temporal evolution of selected spectral lines of argon and copper atoms and ions is analyzed during different phases of the discharge. The results suggest that the behavior of spectral line emissions differs between the pre-peak and afterglow periods, with different lines reaching maximum intensity during these phases. The appearance time and decay time of the afterpeak are shorter for ions than for atoms. These findings are explained in terms of three-body recombination processes and ion mobilities.
JOURNAL OF ANALYTICAL ATOMIC SPECTROMETRY
(2024)
Article
Chemistry, Analytical
Qiuyun Wang, Anmin Chen, Xun Gao
Summary: In this paper, the combination of Tesla coil discharge (TCD) and laser-induced breakdown spectroscopy (LIBS) was used to enhance the emission of Al atomic lines and AlO molecular bands. The optimized distance between the TCD tip and the sample surface was found to be 5 mm, and the optimal laser energy was 25.1 mJ. Furthermore, TCD-SELIBS showed lower limits of detection (LoDs) for Cr and Pb elements compared to surface enhanced LIBS (SELIBS). The combination of TCD and LIBS is a promising technology for high-sensitivity analysis of heavy metals in water, with the advantages of simplicity, low cost, ease of operation, industrialization, and commercialization.
JOURNAL OF ANALYTICAL ATOMIC SPECTROMETRY
(2024)
Article
Chemistry, Analytical
Yanwen Tang, Tingguang Lan, Jianfeng Gao, Zhongjie Bai, Xiaowen Huang, Junjie Han, Na Liu
Summary: Titanium is an important metal widely used in various industries. Ilmenite minerals are the main source of titanium metal and can be found in igneous and metamorphic rocks as well as different types of deposits. To accurately determine U-Pb ages of ilmenite, a new calibration method and appropriate reference materials are urgently needed. Laser ablation sector field inductively coupled plasma mass spectrometry has been used to minimize matrix effects and zircon 91500 has been identified as a suitable reference material for measuring the Pb/U ratio in ilmenite. The direct calibration method using zircon 91500 as an external standard has been found to be effective for in situ U-Pb dating of ilmenite samples under different ablation settings.
JOURNAL OF ANALYTICAL ATOMIC SPECTROMETRY
(2024)