SEPARATION AND PURIFICATION TECHNOLOGY
·
2021
·
IF 7.312
Yaqin Rong,Shuai Li,Junjian Niu,Zhongde Wang,Xiaogang Hao,Chengwen Song,Tonghua Wang,Guoqing Guan
Radioactive cesium ( 137 Cs) ions exhibit high-energy gamma radiation and long half-life. When they enter water body, serious environmental problems and damage to the human body are always generated. Herein, an electroactive composite membrane was facilely prepared by uniformly deposition of nickel hexacyanoferrate (NiHCF) nanoparticles on the surface and inner wall of coal-based tubular carbon membrane (CTCM) for rapid and selective separation of Cs + from wastewater. This NiHCF incorporated CTCM tube exhibited an extremely high removal rate (over 99.99%) over a long period. Meanwhile, it also demonstrated extreme Cs + selectivities even in the solutions with high coexisting ion concentrations (e.g., Cs + :Na + = 1:99, Cs + :K + = 1:99). The rapid and selective Cs + uptake/release should be attributed to the better dispersion of NiHCF nanoparticles with high selectivity to Cs + in the CTCM tube, which reduced the mass transfer distance, increased fluid turbulence and accelerated mass transfer rate. It is expected that such a NiHCF incorporated CTCM tube could be a promising alternative of conventional materials for the separating of radioactive Cs + ions.
研究领域:
环境科学
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材料科学
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DOI
高影响因子
JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY
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2023
·Vol. 332
·期 7
·2589-2600
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IF 1.6
Wang Binyan,Lu Shufan,Dai Chenjing,Ma Jianguo,Luo Jianqiang,Meng Jia,Tong Xiaolan,Liu Shujuan
In present paper, a porous carbon composite electrode, doped with nickel hexacyanoferrate, was prepared for electrochemical removal of cesium ions from aqueous solutions. Based upon the applied voltage of −3 V, a 100% adsorption was achieved in 3 h for the initial Cs + concentration of 10 ppm in solution. The maximum capacity was 155.2 mg g −1 under optimized electrochemical conditions. The electrode was regenerated by applying a reverse voltage of 3 V. The removal efficiency remained 95% even after five consecutive adsorption–desorption cycles. The results suggested that the developed electrochemical method has strong potential for extracting cesium from aqueous solutions.
研究领域:
环境科学
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材料科学
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电化学工程
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产品关联
DOI
高影响因子
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
·
2014
·Vol. 161
·期 12
·B269
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IF 2.859
Yong Kong,Yan Sha,Yongxin Tao,Yong Qin,Huaiguo Xue,Mohong Lu
A facile one-step approach was adopted for the electrochemical deposition of cubic nickel hexacyanoferrate/polyaniline hybrids (NiHCF/PANI) on graphene electrode which played an important role in the electrocatalytic polymerization of aniline. NiHCF was hybridized into PANI based on the unique doping property of PANI. The obtained hybrids were characterized by cyclic voltammetry (CV), scanning electron microscope (SEM), and energy dispersive spectrometer (EDS). The non-enzymatic sensor based on the NiHCF/PANI hybrids presented significant electrocatalytic performance toward the oxidation of glucose, because PANI films on graphene could greatly increase the immobilized amount of the redox couple of Ni(OH)2/NiOOH. The enzyme-free sensor showed excellent analytical performance and high selectivity with no interferences from other oxidizable species. The as-prepared sensor was further applied for the assay of glucose in real samples, and the results demonstrated its potential as a sensitive glucose sensor.
研究领域:
生物化学
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材料科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2025
·
IF 6.3
Hedong Gu,Zhiqiang Lai,Xiaofeng Wang,Weizhi Sun,Ying Rong,Fen Guo
Prussian blue analogues (PBAs), particularly nickel hexacyanoferrate (NiHCF), are promising electrode materials for aqueous sodium-ion batteries but suffer from limited calendar life due to inherent framework instability upon direct contact with aqueous electrolytes. To mitigate this degradation, we investigate the stabilization effects of a multifunctional Nafion coating—exhibiting Na⁺-selective permeability, interfacial bonding enhancement, and electrolyte isolation—applied via drop-casting to NiHCF electrodes derived from powders processed under distinct drying protocols (vacuum vs. air drying). These drying protocols induce divergent physicochemical and electrochemical properties in NiHCF electrodes, critically influencing Nafion-electrode interactions: a discrete Nafion film forms on vacuum-dried NiHCF due to reduced wettability, whereas Nafion infiltrates the porous architecture of air-dried counterparts. Experimentally, Nafion-coated electrodes demonstrate superior cycle stability (83.7 % vs. 68.0 % capacity retention after 300 cycles for coated vs. uncoated vacuum-dried samples), enhanced specific capacity, and improved rate performance. Intriguingly, while numerical simulations confirm that the Nafion coating reduces concentration polarization via selective Na⁺ transport, they fail to predict the observed gains in specific capacity or rate capability. These findings challenge the conventional wisdom that improved ionic transference numbers inherently boost electrode performance by alleviating concentration polarization, revealing instead that such benefits only emerge when concentration polarization dominates over combined ohmic and activation polarization effects.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
ANALYST
·
2024
·
IF 3.6
zexiang Yu,Hu Fu,Wenhua Xu,Lihua He,Zhongwei Zhao
The determination of cesium ions (Cs+) is important for various applications, including resource utilization, environmental monitoring, and human health. Electrochemical sensors, with their inherent advantages, stand out as an ideal choice for Cs+ detection. However, electrode materials for Cs+ sensors usually face problems such as poor selectivity and complex synthesis. Herein, a method employing nickel hexacyanoferrate (NiHCF) as the electrode material for stripping voltammetry in the determination of Cs+ was proposed. Both adsorption and electrochemical intercalation exhibited selectivity. In the presence of interfering ions at a 10:1 molar ratio to Cs+, Cs+ were still preferentially intercalated in NiHCF. However, electrochemical intercalation exhibits superior selectivity for Cs+ compared to adsorption. Meanwhile，the effect of adsorption on the detection was minimized by electrochemical intercalation. Based on the standard addition method, Cs+ was determined using both adsorption and electrochemical intercalation methods. The error reduced significantly from 32.7% above the theoretical value through absorption to 9.5% below the theoretical value through electrochemical intercalation. This approach not only enhanced measurement accuracy but also reduced the costs associated with both measurement and preparation. The study proposed a cost-effective and rapid method for Cs+ measurement using Prussian blue analogs.
研究领域:
分析化学
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环境科学
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电化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
TALANTA
·
2019
·
IF 4.916
Lifang Fan,Caiyun Zhang,Wenjun Yan,Yujing Guo,Shaomin Shuang,Chuan Dong,Yingpu Bi
A facile and label-free electrochemical aptasensor for detection of atrazine (ATZ) was designed based on nickel hexacyanoferrate nanoparticles (NiHCF NPs) and electrochemically reduced graphene oxide (ERGO). Because of ERGO perfect electrochemical conductivity and large surface area, it was first modified on glassy carbon electrode (GCE) surface by electrochemical reduction . NiHCF NPs were immobilized on ERGO/GCE as a signal probe with well-defined peaks and good stability. Subsequently, gold nanoparticles (Au NPs) were electrodeposited on NiHCF NPs/ERGO to anchored aptamer and increase the conductivity and stability of the electrode. When ATZ was added, ATZ-aptamer complexes generated with poor conductivity on the sensor surface increased the hindrance of electron transfer, leading to electrochemical signal decrease. The signal change was used to detect ATZ quantitatively. The designed aptasensor exhibited good analytical performance for determining ATZ. A linear curve was obtained in the range of 0.25–250 pM with a low detection limit of 0.1 pM, and it showed perfect selectivity for ATZ in the presence of diverse interferents. Meanwhile, the electrochemical aptasensor was employed to evaluate ATZ content in the samples.
研究领域:
环境科学
·
分析化学
·
纳米技术
·
电化学
✓ 已验证
DOI
PubMed
高影响因子
BIOSENSORS & BIOELECTRONICS
·
2019
·
IF 9.518
Lifang Fan,Guizhen Wang,Wenting Liang,Wenjun Yan,Yujing Guo,Shaomin Shuang,Chuan Dong,Yingpu Bi
In consideration of the urgent need to determine polychlorinated biphenyls (PCBs) in the environment, a label-free and highly selective electrochemical aptasensor was constructed for determining PCBs based on nickel hexacyanoferrate nanoparticles (NiHCF NPs)/reduced graphene oxides (rGO) hybrids. NiHCF NPs/rGO hybrids with small size of about 5 nm NiHCF NPs were synthesized for the first time by in situ co-deposition of NiHCF NPs on rGO surface. In the hybrids, rGO with large area and good conductivity can supply more space for loading NiHCF NPs and improve the conductivity of the hybrids. NiHCF NPs that can be used to be act as a signal probe exhibit a couple of well-defined peaks with highly reversible redox ability and good stability. Here, PCB77 as a model molecule, the anti-PCB77 aptamer was anchored on the NiHCF NPs/rGO hybrids by covalent bonding reaction. The design aptasensor for detecting PCB77 exhibits a favorable linear response from 1.0 to 100.0 ng/L with a low detection limit of 0.22 ng/L. Meanwhile, it displays good selectivity for PCB77 detection due to the specificity and high affinity of aptamer to PCB77. Additionally, the application of the aptasensor was evaluated in real environmental samples.
研究领域:
环境科学
·
分析化学
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纳米技术
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电化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
International Journal of Electrochemical Science
·
2023
·
IF 1.5
Li Zheng,Chao-Rui Zhang,Dan Zhao,Xuan Wanga,Ting-Ting Du
A β-Ni(OH) 2 flakes modified carbon paste electrode [Ni(OH) 2 /CPE] has fabricated for hydrazine sensing. The β-Ni(OH) 2 flakes derived from nickel hexacyanoferrate (NiHCF) through a facile in situ electrochemical method and characterized by Fourier transform infrared spectrometry, X-ray diffraction, and scanning electron microscopy. Meanwhile, the electrochemical performances of the modified electrode studied by electrochemical impedance spectroscopy, chronocoulometry, cyclic voltammetry, and linear sweep voltammetry. Owing to the large active surface area and enhanced electron transfer efficiency of β-Ni(OH) 2 flakes, the Ni(OH) 2 /CPE showed enhanced catalytic activity toward the oxidation of hydrazine compared with NiHCF/CPE and unmodified CPE. Under the optimized conditions, the amperometric current presented linear dependence on the concentration of hydrazine in the ranges of 0.1 ~ 600 μM with the detection limit of 0.04 μM. Furthermore, the sensor has applied for the determination of hydrazine in water samples.
研究领域:
分析化学
·
电化学
·
传感器与执行器
✓ 已验证
产品关联
DOI
高影响因子
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