Surfaces and Interfaces
·
2025
·
IF 6.3
Jinyue Yang,Jianxin Wang,Yongwen Lin,Xin Huang,Guangming Yin,Haixia Yu,Wendi Wang,Xinyou Zhang,Hong Pan
Transition metal sulfides are considered potential electrode materials for supercapacitors because of their low electronegativity, high electrochemical activity, and rich oxidation–reduction properties , but they also have the disadvantages of poor cycle stability and low magnification performance. In-situ growth sulfides on the current collector can strengthen the structural stability of the electrode to a certain extent, but this method only obtains a weak binding of the sulfide and current collector. With the progress of cycling, repeated structural evolution will inevitably lead to metal dissolution and sulfide shedding. In this study, nickel-poor reactants were cleverly adopted to synthesize one in-situ sulfide on nickel foam (NF) by activating the nickel element in NF to participate in the formation of sulfide, so as to obtain the in-situ electrode material with flower shape and gradient Ni content, named as Ni (2-x) CoS 4 /Ni 2 CoS 4 /Ni electrode. By further compounding polyaniline (PANI) on the surface of Ni (2-x) CoS 4 /Ni 2 CoS 4 /Ni electrode, the in-situ gradient Ni (2-x) CoS 4 /Ni 2 CoS 4 /Ni-PANI composite electrode (ISG-NCS-PANI) was obtained. This in-situ bimetallic sulfide has not only high stability, but also high reactivity. The flower shape with a large specific surface area is also beneficial to enhance the rate performance. As a result, the specific capacitance of the composite electrode is up to 2909.4 F g −1 at 1 A g −1 . After 5000 cycles, the capacity remains 83.8 %. The asymmetric supercapacitor (ASC) composed of activated carbon (AC) negative electrode has a specific capacitance of 211.11 F g −1 at 1 A g −1 . The power density of 749.99 W kg −1 shows the maximum energy density of 65.97 Wh kg −1 . The above results prove that ISG-NCS-PANI electrode holds significant potential for application prospect in the domain of energy storage and conversion.
研究领域:
材料科学
·
能源存储与转换
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产品关联
DOI
高影响因子
JOURNAL OF CHROMATOGRAPHY A
·
2024
·
IF 3.8
Zilong Zhang,Jiahuan Chen,Lixiang Chen,Kaihua Long,Lejing Qu,Silin Huang,Xinyi Yuan,Xu Ji,Qian Li,Xinfeng Zhao
Functional protein immobilization forms the basis for bio-detections. A series of one-point, site-specific immobilization methods have been developed, however, it still remains as a challenge how to avoid the proteins to move in all directions as well as conveniently regenerate the bio-devices. Herein, we have developed a bivalent affinity binding-inspired method for PPARγ immobilization using DNA aptamer and nickel-nitrilotriacetic acid (Ni 2+ -NTA) chelation. The specific DNA aptamer ( Apt 2 ) was selected by an on-column systematic evolution of ligands by exponential enrichment (SELEX) method with affinity of (1.57 ± 0.15) × 10 5 M −1 , determined by isothermal titration calorimetry (ITC). Apt 2 and nickel-nitrilotriacetic acid (Ni 2+ -NTA) were modified on macroporous silica gels via L-α-allylglycine as a linker. They respectively interacted with PPARγ and 6×His tag via bivalent affinity binding for the receptor immobilization. After comprehensive surface characterization, PPARγ was proved to be successful immobilized. Chromatographic studies revealed that the immobilized PPARγ has conformation selectivity, which discriminated agonist and antagonist of the receptor. Ligand-binding parameters (affinity and rate constant) of four agonists (rosiglitazone, pioglitazone, troglitazone, and magnolol) with PPARγ were determined. Troglitazone showed the lowest dissociation rate constant. The binding affinities (3.28 × 10 7 , 1.91 × 10 6 , 2.25 × 10 7 , and 2.43 × 10 7 M −1 ) were highly consistent with the data obtained using purified receptor in solution (2.16 × 10 7 , 4.52 × 10 6 , 1.20 × 10 7 , and 1.56 × 10 7 M −1 ), offering reliable bio-detection method for PPARγ and its ligands. Due to the biocompatibility of nuclear receptor with DNA, it is conceivable that the bivalent affinity-based method will be a general method for the immobilization of other nuclear receptors, which may provide selective conformation and improved ligand-binding activity for the receptors.
研究领域:
生物化学
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分子生物学
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生物技术
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分析化学
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DOI
PubMed
高影响因子
ChemistrySelect
·
2023
·Vol. 8
·期 10
·e202204406
·
IF 2.1
Chibin Pu,Zhongxi Huang,Lihua Huang,Qian Shen,Changmin Yu
Graphical We firstly reported the direct detection and quantification of His-tagged protein based on intramolecular rigidification induced emission in dilute solution, achieved the real-time and fast fluorescent “On” response of His-tagged proteins in protein solution. Our probe could be used in fluorescent labeling of proteins with simple procedure, high quality and low background interference. Histidine tag (His-tag) is a representative epitope tag, which has been widely used in the purification or immobilization of recombinant proteins. In this study, a novel probe CTPE-IDA-Ni 2+ based on intramolecular rigidification induced emission for fluorescence detecting His-tagged proteins is successfully developed and experimentally demonstrated. This detecting system is based on TPE derivative incorporated IDA-Ni 2+ moiety for real-time detection of His-tagged proteins. In the presence of His-tagged proteins, the IDA-Ni 2+ -His-tag complex was formed, which restricted the rotation of two phenyl rings linked with TPE and subsequently resulting in the fluorescence turn on. Results have shown that our probe could directly detect His-tagged proteins with good selectivity and fast response within 10 min. In addition, we have proved that this system could be used in fluorescent labeling of His-tagged protein instead of traditional Western blot assay with simple procedure, high quality and low background interference, as well as without aggregation-caused quenching (ACQ) problems like some organic dyes.
研究领域:
分析化学
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生物化学
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分子生物学
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蛋白质工程
✓ 已验证
产品关联
DOI
高影响因子
HYDROMETALLURGY
·
2023
·
IF 4.7
Changye Mang,Guanghui Li,Yanhu Chen,Jun Luo,Mingjun Rao,Tao Jiang
Partial neutralization is typically used to remove Fe 3+ ions from the acid leach solution of laterite. However, during this process, significant amounts of Mg 2+ , Ni 2+ , Co 2+ , and SO 2– 4 are lost. With increasing initial Fe 3+ concentration and solution pH, the severity of loss increases, with the precipitation of Fe 3+ . In this study, the mechanisms of ion co-precipitation during partial neutralization were investigated. Based on density functional theory calculations, a precipitation pathway through the formation of [Fe 4 (OH − ) 2 (SO 2– 4) 4 ]•[2SO 2 – 4 •yH 2 O]•[M 2+ ] was proposed. The differential charge density diagram indicated that the O atoms acted as the charge acceptors and maintained the precipitate structure. The coordination between M 2+ and SO 2– 4 could be destroyed via intense agitation, releasing approximately 100% of Mg 2+ , Ni 2+ , and Co 2+ ions from the precipitates to the solution. Furthermore, the addition of cationic or anionic surfactants limited the formation of these coordination bonds. The highest retention percentages of Mg 2+ , Ni 2+ , and Co 2+ in solution were 99.4, 99.6, and 99.9%, respectively, after adding 2 × 10 −5 mol/L of sodium dodecylbenzenesulfonate (CTAB). In addition, a high temperature could break these coordination bonds. The retention percentages of Mg 2+ , Ni 2+ , and Co 2+ increased from 82.6, 85.2, and 86.5% to 99.9, 99.6, and 99.8%, respectively, as the temperature increased from 25 to 65 °C. These results confirmed the rationality of the proposed structure of the precipitate.
研究领域:
化学工程
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材料科学
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环境化学
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产品关联
DOI
高影响因子
JOURNAL OF CHROMATOGRAPHY B-ANALYTICAL TECHNOLOGIES IN THE BIOMEDICAL AND LIFE SCIENCES
·
2016
·
IF 2.687
Xiao-Mei He,Bi-Feng Yuan,Yu-Qi Feng
Immobilized metal affinity chromatography (IMAC) technique is frequently used in the purification of histidine-tagged (His-tagged) recombinant proteins. In this study, nickel(II)-immobilized carboxyl cotton chelator (CCC-Ni 2+ ) fibers was synthesized by a simple method based on the coordination effect between Ni 2+ and carboxyl group. The nickel content of the CCC-Ni 2+ fibers was determined to be 5 times larger than that of Ni 2+ -immobilized sulfhydryl cotton fiber (SCF-Ni 2+ ) fibers developed in our previous work. The prepared CCC-Ni 2+ fibers were then applied for the selective and rapid separation of His-tagged protein from escherichia coli ( E. coli ) cell lysates on the basis of the high affinity of Ni 2+ to 6 × His with a lab-in-syringe format. Benefiting from the good biological compatibility and high nickel content, the results showed that CCC-Ni 2+ fibers were able to selectively capture His-tagged proteins from complex E. coli cell lysates and exhibited a relatively large adsorption capacity toward His-tagged protein. The recoveries of His-tagged GFP in E. coli cell lysates were in the range of 89.8%-106.7% with the relative standard deviations (RSDs) less than 9.4% (intra-day) and 10.3% (inter-day). Taken together, this efficient approach for the purification of recombinant proteins extends the application of CCC-based fibrous materials in biological analysis.
研究领域:
生物化学
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蛋白质工程
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分析化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Journal of Materials Chemistry A
·
2024
·Vol. 12
·期 24
·14698-14708
·
IF 10.7
Xinjie Wang,Juntian Li,Juan Li,Binghua Jing,Yun Sun,Teng Wang,Didi Li,Haibo Huang,Zhimin Ao
Ligands play an important role in the dispersion of metal and catalytic activity in single-atom transition metal-doped catalysts (SATMCs). In this work, a series of oxygen-ligand (O-ligand)-single-atom-Ni/2-dimensional reduced graphene oxide (RGO) materials (SANiX-O-2DRGO (X = 0.5–5)) were fabricated by a simple one-step co-reduction method. The single Ni atom on SANi5-O-2DRGO is embedded into the RGO and ligated by four O-ligand atoms. A systematic study confirms that the O-ligand is conducive to the dispersion of Ni and the formation of SATMCs with high metal loading. Density functional theory (DFT) calculation results demonstrate that the d-band center value of O-ligand-single-atom-Ni is closer to the Fermi level than that of the conventional N coordination, which is beneficial for electronic transition and enhances catalytic activity, i.e., the O-ligand accelerates the electron transfer between the carrier and the single metal atom, thus improving the catalytic oxidation capacity of volatile organic compounds (VOCs) on SANi5-O-2DRGO. As a demonstration, SANi5-O-2DRGO exhibits excellent reusability, water resistance, and stability for ethyl acetate oxidation. The degradation of ethyl acetate remained at 100% over 150 hours of continuous onstream operation. The catalytic oxidation mechanism of ethyl acetate on SANi5-O-2DRGO was also investigated. The O-ligand atoms provide the key electron transfer in the activation of adsorbed oxygen and catalytic oxidation process of reaction intermediates.
研究领域:
催化
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材料科学
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环境科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
Molecular Catalysis
·
2020
·
IF 3.687
Anwei Wang,WeiYou Zhou,Zhonghua Sun,Zhong Zhang,Zhihui Zhang,MingYang He,Qun Chen
Developing efficient heterogeneous catalytic systems based on easily available materials and molecular oxygen for the selective oxidation of alkylarenes is highly desirable. In the present research, NiMn hydrotalcite (Ni 2 Mn-LDH) has been found as an efficient catalyst in the oxidation of alkylarenes using molecular oxygen as the sole oxidant without any additive. Impressive catalytic performance, excellent stability and recyclability, broad applicable scope and practical potential for the catalytic system have been observed. Mn 3+ species was proposed to be the efficient active site, and Ni 2+ played an important role in stabilizing the Mn 3+ species in the hydrotalcite structure. The kinetic study showed that the aerobic oxidation of diphenylmethane is a first-order reaction over Ni 2 Mn-LDH with the activation energy ( E a ) and pre-exponential factor ( A 0 ) being 85.7 kJ mol −1 and 1.8 × 10 9 min −1 , respectively. The Gibbs free energy (Δ G ≠ ) was determined to be -10.4 kJ mol -1 K -1 for the oxidation based on Eyring-Polanyi equation, indicating the reaction is exergonic. The mechanism study indicated that the reaction proceeded through both radical and carbocation intermediates. The two species were then trapped by molecular oxygen and H 2 O or hydroxyl species, respectively, to yield the corresponding products. The present research might provide information for constructing highly efficient and stable active site for the catalytic aerobic oxidation based on available and economic material.
研究领域:
催化
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化学工程
·
材料科学
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物理化学
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING SCIENCE
·
2024
·
IF 4.1
Ze-Min Zhao,Yu Zhang,Yu Chen,Jieying Jing,Wen-Ying Li
Nickel–aluminum (Ni–Al) spinel catalysts with distinct Ni/Al molar ratios were synthesized to construct Ni 2+ coordination sites. Owing to the favorable distribution of Ni 2+ coordination sites and the presence of suitable concentration of Ni 2+ in octahedral sites, Ni/Al-0.725 catalyst achieved an 86.1 % average yield of perhydrophenanthrene, which was higher than that obtained with Ni/Al-0.25 (6.3 %). Characterization results indicated that Ni 2+ of the Ni/Al-0.725 catalyst was present in octahedral sites and ∼ 40.4 % Ni 2+ was reduced to Ni, whereas the active Ni metal of Ni/Al-0.25 catalyst mainly comprised Ni 2+ occupying tetrahedral sites as precursors. Furthermore, the Ni/Al-0.725 catalyst exhibited the smallest Ni particle size (2.82 nm) and the largest Ni available surface (19.62 m 2 /g sample ), which helped alleviate competitive adsorption among aromatic hydrocarbons. The Ni reduced by the spinel catalysts was in an electron-deficient state, which enhanced the adsorption of polycyclic aromatic hydrocarbons.
研究领域:
催化
·
化学工程
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
TALANTA
·
2020
·
IF 5.339
Nan Yin,Ruihuan Zhao,Jie Zhang,Dingding Yang,Zhimin Guo,Rui Liu,Xin Yao
Abnormal O-linked N-acetylglucosamine (O-GlcNAc) concentrations have been associated with many diseases, but the lack of accurate detection method limited O-GlcNAc to be used as a biomarker in clinical diagnosis. Then O-GlcNAc transferase (OGT) has drawn researchers’ attention as it closed related to the level of O-GlcNAc and be considered to be a promising new target for diseases diagnosis. Nevertheless, the existing OGT detection methods are either need labeling or the sensitity can not meet the needs of clinic testing. Herein, a label-free and sensitive SPR biosensor was developed for accurate detection of OGT based on a multi-functional peptide. The designed peptide contains three recognition sites, one is the cleavage site of protease K, one is the O-GlcNAcylated site by OGT, and another is six histidine which be used as the signal report probe to recognize Ni 2+ . The immobilized peptide would be cleavaged by proteinase K, then the His-tag residue part will leave the surface of Au film, resulting less His-tag could bind to Ni 2+ and a small SPR signal would be record. If the peptide is O-GlcNAcylated by OGT, the cleaving reaction would be limited due to the adjacent site of O-GlcNAcylation. Then more His-tag can be left on the Au film and a bigger SPR signal could be record, this signal is associated with the concentration of OGT. Utilizing the change of the peptide configuration as a signal report probe for OGT detection not only avoids labeling of peptide, but also makes the method more sensitive. The determination linear range of OGT is from 2.00 × 10 −13 to 5.00 × 10 −8 M with a detection limit of 1.19 × 10 −13 M, and the separation of two enzyme reactions ensured the high selectivity of the method. Finally, the sensing system was successfully used for OGT detection in blood samples with satisfied recovery. In summary, the label-free SPR platform for accurate detection of OGT in real samples is helpful to promote OGT serve as a biomarker for early clinical diagnosis of O-GlcNAc related diseases.
研究领域:
生物化学
·
分析化学
·
生物传感器
·
临床诊断
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Journal of Energy Chemistry
·
2020
·
IF 7.216
Aili Wang,Zhiyuan Cao,Jianwei Wang,Shurong Wang,Chengbo Li,Nuo Li,Lisha Xie,Yong Xiang,Tingshuai Li,Xiaobin Niu,Liming Ding,Feng Hao
Nickel oxide (NiO x ) has exhibited great potential as an inorganic hole transport layer (HTL) in perovskite solar cells (PSCs) due to its wide optical bandgap and superior stability. In this study, we have modulated the Ni 2+ vacancies in NiO x film by controlling deposition temperature in a hot-casting process, resulting the change of coordination structure and charge state of NiO x . Moreover, the change of the HOMO level of NiO x makes it more compatible with perovskite to decrease energy losses and enhance hole carrier injection efficiency . Besides, the defect modulation in the electronic structure of NiO x is beneficial for increasing the electrical conductivity and mobility, which are considered to achieve the balance of charge carrier transport and avoid charge accumulation at the interface between perovskite and HTL effectively. Both experimental analyses and theoretical calculations reveal the increase of nickel vacancy defects change the electronic structure of NiO x by increasing the ratio of Ni 3+ /Ni 2+ and improving the p-type characteristics. Accordingly, an optimal deposition temperature at 120 °C enabled a 36.24% improvement in the power conversion efficiency compared to that deposited at room temperature (25 °C). Therefore, this work provides a facile method to manipulate the electronic structure of NiO x to improve the charge carrier transport and photovoltaic performance of related PSCs.
研究领域:
材料科学
·
纳米技术
·
能源技术
·
固体物理
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光伏技术
·
薄膜技术
✓ 已验证
DOI
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2023
·
IF 8.4
Lanlan Guo,Yanji Feng,Feng Shi,Wei Zhao,Hua Zeng,Tingyu Chen,Yingli Yang,Guodong Wang,Xiaolian Liu,Yan Wang,Xueli Yang
In this work, pure NiO, Al-doped NiO, W-doped NiO and a series of Al/W co-doped NiO nanoflowers were successfully prepared through a simple solvothermal method . Various characterization methods, such as XRD , SEM, TEM, HRTEM and XPS , were used to confirm the physical and chemical properties of the sensitive materials in terms of micro-nano structures, compositions and elemental distributions. The as-obtained Al/W co-doped NiO showed a nanoflower structure with an approximate size of ∼ 200 nm. What's more, among six sensors constructed from the sensitive materials, the sensor based on 3 at% Al 3+ /3 at% W 6+ co-doped NiO (3Al3W-NiO) achieved the highest response (R g /R a =112) toward 100 ppm triethylamine with a low detection limit (1 ppm) at 325 ℃. Besides, this sensor also exhibited excellent response/recovery characteristics and long-term stability. These favorable sensing performances of the 3Al/3 W co-doped NiO sensor are not only modulated by the initial resistance (R a ), but are also closely related to the large specific surface area , porous structures , low crystallinity , rich oxygen vacancies and high Ni 3+ /Ni 2+ ratio in the composite nanomaterials.
研究领域:
材料科学
·
纳米技术
·
化学传感器
·
气体传感
✓ 已验证
DOI
高影响因子
Nano Energy
·
2018
·
IF 13.12
Guorong Chen,Juan An,Yiming Meng,Changzhou Yuan,Bryan Matthews,Fei Dou,Liyi Shi,Yongfeng Zhou,Pingan Song,Gang Wu,Dengsong Zhang
Cobalt-free Li and Mn-rich layered cathode materials are promising for next generation lithium ion batteries due to their high specific capacity and low cost. However, these materials are facing serious issues, such as structural collapse due to volume shrinkage during Ni 2+ oxidation to Ni 4+ and oxygen vacancy generation over 4.5V. In this work, we report a strategy to address the issue of volume shrinkage caused by structural deformation via constructing a large-size rigid frame by simultaneously doping inactive and large radius atoms of Cd and S. This strategy significantly reduces the volume shrinkage when fully delithiated relative to the pristine material. The Cd- and S-doped cathode materials present a highly reversible structure, which were determined by using HAADF-STEM and in-situ XRD characterization. The doped Cd and S atoms act as supporting atoms and synergistically enlarge the layer spacing of crystalline from 0.455 to 0.483 nm. The in-situ XRD monitors the structural changes in real time during charging and discharging processes, further verifying structural stability during cycling. Due to the unique structural properites, an initial capacity of 268.5 mAh g −1 at 0.1 C along with a good rate capacity of 153.8 mAh g −1 at 5 C were achieved. Also, a capacity of 243.4 mAh g-1 at 0.1 C over 80 cycles indicate good cyclic stability of the co-doped Li- and Mn-rich layered cathode.
研究领域:
材料科学
·
电化学
·
电池技术
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）