NANO
·
2020
·
IF 1.566
Dan Wang,Xinfeng Xiao,Bo Han,Weiming Ni,Yu Gao,Lin Li,Jianliang Xue
A series of UiO-66-PEI materials were obtained by impregnating UiO-66 with different amounts of polyethylenimine (PEI) with UiO-66 as the basic skeleton material. The materials were used as adsorbents to remove Ni 2 + and Cu 2 + from water. The prepared UiO-66-PEI-30 had good adsorption capacity on Ni 2 + and Cu 2 + at 30% PEI. The adsorption of Ni 2 + and Cu 2 + with UiO-66-PEI-30 was further studied. The role of eluent types, elution time, concentration and volume on the effect of Cu 2 + elution was investigated. The adsorption of Ni 2 + and Cu 2 + by UiO-66-PEI-30 followed the pseudo-second-order kinetic model and Langmuir adsorption model. The maximum adsorption capacities obtained by Langmuir fitting for Ni 2 + and Cu 2 + were 11.54 mg g − 1 and 24.87 mg g − 1 , respectively. After four desorption/adsorption experiments, UiO-66-PEI-30 still showed good adsorption performance. UiO-66 impregnated with PEI was an adsorbent with adsorption potential.
研究领域:
材料科学
·
环境科学
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产品关联
DOI
高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
·
2019
·
IF 14.229
Yaru Wang,Jianjun Zhao,Xianqiang Xiong,Shengwei Liu,Yiming Xu
Anatase TiO 2 is the most studied environmental photocatalyst, but its efficiency is still not high enough to enable application. Herein we report a positive effect of Ni 2+ ions on the photocatalytic reaction in neutral aqueous solution. On addition of 1 mM Ni(ClO 4 ) 2 , the rates of phenol oxidation on TiO 2 and 0.5 wt.% Pt/TiO 2 increased by factors of 2.1 and 8.0, respectively. Meanwhile, the formation of organic intermediate was reduced, and the removal of total organic content was enhanced. Interestingly, Ni 2+ concentration did not change with irradiation time. Moreover, a maximum rate of phenol degradation was observed with Ni 2+ ions, occupying half the surface of TiO 2 or Pt/TiO 2 , where Ni(OH) + was more active than Ni(OH) 2 . X-ray photoelectron spectroscopy identified a Ni 3+ species produced in absence of phenol. A (photo)electrochemical study revealed that Ni 2+ oxidation was favored over H 2 O oxidation, whereas Ni 2+ and Pt inhibited and facilitated O 2 reduction, respectively. It is proposed that the adsorbed Ni(OH) + on TiO 2 is oxidized to Ni 3+ by the photogenerated holes of TiO 2 , followed by regeneration through phenol oxidation. The Ni 2+ -catalyzed organic oxidation then promotes the Pt-catalyzed O 2 reduction, and vice visa, resulting into the greatly improved efficiency of charge separation. This work highlights the possibility of Ni 2+ ions as the hole mediator of organic oxidation over a semiconductor.
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
CHINESE JOURNAL OF STRUCTURAL CHEMISTRY
·
2024
·
IF 5.9
Maomao Liu,Guizeng Liang,Ningce Zhang,Tao Li,Lipeng Diao,Ping Lu,Xiaoliang Zhao,Daohao Li,Dongjiang Yang
Rationally constructed new catalyst can promote carbon dioxide reduction reaction (CO 2 RR) to valuable carbonaceous fuels such as formate and CO, providing a promising strategy for low CO 2 emissions. Herein, the synthesized Ni 3 S 2 @C as a highly efficient electro-catalyst exhibits remarkable selectivity for formate with 73.9% faradaic efficiency (FE) at −0.7 V vs. RHE. At high applied potential, it shows a high syngas evolution with CO/H 2 ratios (0.54–3.15) that are suitable for typical downstream thermochemical reactions . The experimental and theoretical analyses demonstrate that the electron-rich Ni 2+ in Ni 3 S 2 enhances the adsorption behavior of ∗ OCHO intermediate, reduces the energy barrier of the formation of intermediates, and improves the selectivity of the formate product. Attenuated total reflection surface-enhanced infrared absorption spectra conducted in situ show that ∗ OCHO intermediate is more likely to be generated and adsorbed on Ni 3 S 2 , enhancing the selectivity and activity of the formate product.
研究领域:
电化学
·
催化材料
·
可再生能源
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产品关联
DOI
高影响因子
Food Chemistry-X
·
2024
·
IF 6.5
Xiuying Liu,Si Kang,Wen Wang,Lijie Zhu,Wei Zhang,Pingping Wang,Zaixi Shu,Yiwei Tang
Histamine is a biogenic amine with various physiological functions. However, excessive consumption of histamine can lead to various symptoms, and pose a threat to human lives. A ratiometric fluorescent test strip for visual detection of histamine was developed based on CB-Ni 2+ @CDs probes. As the concentration of histamine increases, the test strips exhibit a transition in fluorescence signal from yellow-green to blue. The RGB values were extracted from the images, and used for quantitative analysis of histamine. The method had a linear range of 0–1.0 mM, with a detection limit of 0.086 mM. The test strips were employed for the detection of histamine, and the recovery rate was found to be in the range of 88.3% to 104.69%, indicating a high level of accuracy. The uniqueness of the test strips lies in their ability to be produced simply by mixing CB, Ni 2+ on a suitable polyvinyl alcohol/wood cellulose fiber substrate.
研究领域:
生物化学
·
食品安全检测
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产品关联
DOI
PubMed
高影响因子
JOURNAL OF MOLECULAR LIQUIDS
·
2022
·
IF 6.633
Chaojian Zhang,Tianrui Yang,Junsheng Liu,Qianqian Duan,Jiahui Song,Youjun Yin,Hansong Wang
Novel poly(ethylene imine) (PEI) modified chitosan-based hybrid membranes (PMCHMs) were created via a soft chemistry method, in which unmodified chitosan (CS) firstly reacted with PEI to produce a CS-PEI precursor. Later, such CS-PEI precursor was blended with silicone to create the membrane solution of PMCHMs. Finally, PMCHMs could be obtained via phase-inversion process. Multi-component sorption of Pb 2+ , Cu 2+ and Ni 2+ on PMCHMs in metal mixed solutions, such as, Pb 2+ &Cu 2+ and Pb 2+ &Ni 2+ binary, Pb 2+ , Cu 2+ and Ni 2+ ternary, as well as Pb 2+ , Cu 2+ , Ni 2+ , Cd 2+ and Cr 3+ quintuple mixed solutions, was inspected. The calculation of effective diffusion coefficients, distribution coefficients and selectivity coefficients showed that Pb 2+ sorption on PMCHMs had excellent selectivity in these mixed multi-metal solutions. While, the calculation of activation energy proved that Pb 2+ , Cu 2+ and Ni 2+ sorption on PMCHMs was a physic-sorption process Also, mechanism insight reveals that Pb 2+ sorption on PMCHMs could be depicted via Lagergren pseudo-2nd-order kinetic model and Langmuir or Freundlich isotherm equation. Exclusively, intra-particle diffusion process was discussed in detail. Desorption testing verified that HCl is a good desorbent for metals sorption on PMCHMs and the cycle time of membranes can arrive at 6 times. These results demonstrate that PMCHMs can be used to preferentially eradicate Pb 2+ from metal mixture solutions, showing prospective applications in the treatment of metal mixture wastewater from waste vehicle power-battery and other various metal-bearing polluted water.
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
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
·
2014
·Vol. 22
·期 1
·555-564
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IF 2.757
Wu Yingxin,Wu Zihao,Huang Xiongfei,Simonnot Marie-Odile,Zhang Tao,Qiu Rongliang
Effective dehalogenation by nanoscale zerovalent iron (nZVI) has been reported. In this study, the effects of Ni 2+ , Cu 2+ ions, and the nonionic surfactant Tween-80 on dechlorination of 2,2’,5,5’-tetrachlorinated biphenyl (PCB-52) by nZVI were investigated in aqueous solution. The rate of dechlorination was significantly enhanced by Ni 2+ , while Cu 2+ had a less significant catalytic effect. Ni 2+ and Tween-80 used in combination synergistically enhanced dechlorination of PCB-52 by nZVI, although the enhancement by Tween-80 was inhibitory in the presence of Cu 2+ and insignificant in the absence of both metal ions. Congener specificity in the dechlorination pathway resulted from the preferential retention of ortho-chlorine, which restricted the formation of environmentally toxic coplanar PCB congeners. The application of nZVI dehalogenation enhanced by Ni 2+ and Tween-80 is a promising technique for posttreatment of PCB-contaminated soil washing solutions.
研究领域:
环境科学
·
化学
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DOI
PubMed
高影响因子
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
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2019
·Vol. 125
·期 5
·1-10
·
IF 1.784
Guo Huiling,Wang Wenjing,Zhou Fengzhen
In this study, core–shell Fe 3 O 4 @Au nanoparticles with good chemical stability and tunable particle size were synthesized via Au–S bonding, which overcomes the challenges encountered for the reported preparation of Fe 3 O 4 @Au. The surface of nanoparticles was investigated by TEM, XRD, XPS, FT-IR, VSM and DLS which characterized the size, morphology, chemical lattice, elemental analysis, functional groups, magnetic strength, and size distribution. The results showed that Fe 3 O 4 @Au/NTA-Ni 2+ magnetic nanocomposites were spherical with an average diameter of 469.5 nm, and superparamagnetic with saturation magnetization of 7 emu/g. The magnetic nanocomposites were directly utilized for one-step purification of His-tagged proteins from Description Escherichia coli lysate. The as-separated proteins were qualitatively validated by gel analysis and quantitatively measured by UV–visible spectroscopy. The binding capacity of Fe 3 O 4 @Au/NTA-Ni 2+ towards His-tagged proteins was 48.3 mg/g. The target proteins were separated with high purity and separation efficiency up to 96.6%. Their specificity and enrichment ability were maintained during six cycles of adsorption–elution operations. The advantages of this novel nanoparticle can open a window for the multifunction of nanomaterials and their biological application.
研究领域:
生物化学
·
纳米技术
·
蛋白质工程
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产品关联
DOI
高影响因子
Processes
·
2019
·Vol. 7
·期 9
·590
·
IF 1.963
Tingting Zhong,Yali Liu,Xiaorong Kang
Batch tests were carried out to study the effect of simultaneous addition of ethylenediaminetetraacetic acid and Ni2+(EDTA-Ni) on anaerobic digestion (AD) performances of kitchen wastes (KWs). The results indicated that the cumulative biogas yield and methane content were enhanced to 563.82 mL/gVS and 63.7% by adding EDTA-Ni, respectively, which were almost 1.15 and 1.07-fold of that in the R2 with Ni2+addition alone. At the same time, an obvious decrease of propionic acid was observed after EDTA-Ni addition. The speciation analysis of Ni showed that the percentages of water-soluble and exchangeable Ni were increased to 38.8% and 36.3% due to EDTA-Ni addition, respectively. Also, the high-throughput sequencing analysis revealed that the EDTA-Ni promoted the growth and metabolism ofMethanosarcinaandMethanobacterium, which might be the major reason for propionic acid degradation and methane production.Keywords:EDTA;kitchen waste;methane;microbial community;Ni2+
研究领域:
环境科学
·
微生物学
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产品关联
DOI
高影响因子
CHEMICAL PHYSICS LETTERS
·
2021
·
IF 2.328
Linshan Zhang,Deshun Huang,Guozong Yue,Jing Zhu,Lijun Yang,Luming Yang,Weihua Dan,Pengxiang Zhao
A colorimetric sensor for detection of Ni 2+ with high sensitivity and selectivity has been developed by functionalizing gold nanoparticles (AuNPs) with phytate (PA) in aqueous solution. The as-prepared PA-AuNPs exhibit the excellent selectivity for colorimetric detection of Ni 2+ over 13 metal ions in 15 min. In the presence of Ni 2+ , the color of PA-AuNPs changes from red to blue, and the plasmon absorption exhibits a redshift. The detection limit of PA-AuNPs is found to be 5 μM and 0.216 μM for naked eyes and UV–vis spectroscopy on basis of signal-to-ratio of 3:1 respectively.
研究领域:
分析化学
·
纳米技术
·
环境科学
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产品关联
DOI
高影响因子
ENVIRONMENTAL TECHNOLOGY
·
2022
·
IF 3.475
Yuxing Tong,Qunshan Yan,Song Gao,Bin Xiong,Xiangbing Tang,Zhichang Liu,Pengfei Li,Ming Huang,Ziwei Wang,Xi Le,Wei Pei,Zejun Dai,Zhe Xiong,Yi Wang
In this study, KMnO4 modification was proved to effectively increase the Ni2+ adsorption capacity of biomass. In order to clarify the KMnO4 modification mechanism, the Ni2+ adsorption characteristics of KMnO4 modified corncob (PPCB) under adsorption time, pH and Ni2+ concentration were studied. The results showed that the adsorption was the pseudo second-order kinetic process, indicating that chemisorption was the dominated process, which followed the Langmuir isotherm model and the highest Ni2+ adsorption capacity of PPCB reached 35.6 mg/g. By KMnO4 modification, the corncob was oxidized to generate carboxylates, and the MnO2 (reduction product) was loaded on the modified corncob, both carboxylates and MnO2 increased the Ni2+ adsorption capacity of PPCB. The molecular dynamic results indicated the carboxylate structures had the strongest adsorption capacity. Moreover, the Ni2+ removal efficiency of KMnO4 modified biomass decreased linearly with the increase of lignin content in biomass, while KMnO4 modified lignin showed a good adsorption performance, indicating that the cross-linked structures between lignin and other components in the biomass could inhibit the adsorption capacity of PPCB.
研究领域:
环境科学
·
材料科学
✓ 已验证
DOI
PubMed
高影响因子
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
·
2024
·
IF 4.1
Peng Yang,Lulu Xu,Yourong Tao,Wenxin Wang,Xingcai Wu,Dunming Zhang
Here, Ni 2+ -doped Na 2 Ti 6 O 13 nanotubes (NNTONT) were successfully synthesized by a simple hydrothermal ultrasound method. It could be found that Na 2 Ti 6 O 13 partly transformed to TiO 2 with the addition of Ni 2+ , and affected the electrochemical properties of sodium ion batteries (SIBs). When the added Ni source got to 40 wt% (NNTONT-40), the capacity of charge–discharge approached the best value: 130.4 mAh/g after 100 cycles at 1C (1C = 177 mA g −1 in this paper), and increased by 41 % compared with undoped NTONT (92.2 mAh/g), and increased by 76 % even at a high rate (10C) after 1000 cycles. Subsequently, the analyses of CV (cyclic voltammetry), EIS (AC impedance spectrum) and GITT (galvanostatic intermittent titration technique) confirmed that Ni 2+ -doping resulted in lower Na + insertion-extraction voltage, smaller charge transfer resistance and higher ion diffusion rate and lager BET specific surfaces. Therefore, Ni 2+ -doping is an effective strategy to improve the capacity, rate performance and energy density, which is a promising SIBs’ anode material.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
INFRARED PHYSICS & TECHNOLOGY
·
2023
·
IF 3.3
Junyi Wang,Feifei Huang,JiaBo Li,Bingpeng Li,Ying Tian,Shiqing Xu
ZnGa/AlO 4 provides an octahedral coordination field in which Ni 2+ serves as the luminescent center and combines with highly attractive transparent glass ceramics, playing a crucial role in achieving broadband near-infrared (NIR) emission. Transparent glass-ceramics embedded with ZnGa/AlO 4 :Ni 2+ mixed crystals prepared by secondary high-temperature melting methods retain the structural characteristics of the dual-phase crystal, which was confirmed by a series of structural and morphological characterization. Through fine tailoring, the surrounding Ni 2+ ligand field environment was transformed, realizing special composite NIR emission characteristics with a half-maximum width (FWHM) exceeding 280 nm, which achieved the best results for now in kinds of similar materials. The results show that the NIR emission of ZnGa/AlO 4 :Ni 2+ -doped transparent glass-ceramics is significantly broadened while maintaining a high level and a long lifetime, which makes it an excellent candidate material for IR light sources and broadband fiber amplifiers.
研究领域:
材料科学
·
光学工程
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产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）