JOURNAL OF HAZARDOUS MATERIALS
·
2015
·
IF 4.529
Ping Tan,Jian Sun,Yongyou Hu,Zheng Fang,Qi Bi,Yuancai Chen,Jianhua Cheng
Novel, highly ordered layered graphene oxide (GO) membranes with larger interlayer spacing were prepared by induced directional flow and were used as adsorbents for the removal of Cu 2+ , Cd 2+ and Ni 2+ from aqueous solutions. The effects of pH, ionic strength, contact time, metal ion concentration and cycle time on Cu 2+ , Cd 2+ and Ni 2+ sorption were investigated. The results indicated that the adsorption of Cu 2+ , Cd 2+ and Ni 2+ onto GO membranes was greatly influenced by the pH and weakly affected by the ionic strength. The adsorption isotherms for Cu 2+ , Cd 2+ and Ni 2+ were well fitted by the Langmuir model. The maximum adsorption capacities of the GO membranes for Cu 2+ , Cd 2+ and Ni 2+ were approximately 72.6, 83.8 and 62.3 mg/g, respectively. The adsorption kinetics of Cu 2+ , Cd 2+ and Ni 2+ onto GO membranes followed the pseudo-second-order model. The adsorption equilibrium was reached in a shorter time. The GO membranes can be regenerated more than six times based on their adsorption/desorption cycles, with a slight loss in the adsorption capacity. The results demonstrated that the GO membranes can be used as effective adsorbents for heavy metal removal from water.
研究领域:
环境科学
·
材料科学
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DOI
高影响因子
Advanced Optical Materials
·
2026
·
IF 7.2
Zhidan Liu,Qiufeng Shi,Lei Wang,Haijie Guo,Dawei Wang,Konstantin V. Ivanovskikh,Jianwei Qiao,Xiao-Jun Wang
Broadband and thermally robust near-infrared (NIR) emitters are essential for advanced photonic applications from night-vision imaging to biological sensing and spectroscopy. However, transition-metal-activated phosphors face an intrinsic coupling between emission bandwidth and thermal stability, with ultrabroad spectra accompanied by severe thermal quenching. Here, we demonstrate a dual-site occupancy strategy mitigating this trade-off by enabling Ni 2+ to occupy two crystallographically distinct octahedral sites in double perovskite Ca 2 AlTaO 6 . The optimized Ca 2 AlTaO 6 :Ni 2+ phosphor exhibits broadband NIR-II emission (1050–1650 nm) with a 225 nm full width at half maximum, retaining 61% of room-temperature luminescence intensity at 423 K. Spectral deconvolution, lifetime analysis, and structural characterization reveal the concentration-dependent emission peak red-shift (1260 → 1310 nm) originates from dynamic Ni 2+ redistribution between the two sites, with controllable spectral broadening. This site-selective emission mechanism provides a reliable route for tunable NIR-II spectral engineering. A phosphor-converted LED based on a commercial red excitation chip delivers efficient NIR-II output, validated in night-vision imaging, biological tissue transillumination, and qualitative chemical identification. These results establish dual-site occupancy as a viable, generalizable design principle for broadband, thermally stable NIR emitters, with direct relevance to photonic light-source engineering.
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DOI
高影响因子
PROGRESS IN NUCLEAR ENERGY
·
2026
·
IF 3.2
Yixuan Cai,Mei Li,Hedi Wei,Xudong Wang,Jiayi Chen,Jia Yan,Rugeng Liu,Linshan Zhang,Wei Han
To electrodeposit uranium dioxide from LiCl–KCl molten salt containing Cr 3+ and Ni 2+ , a series of electrochemical techniques were employed to investigate the electrochemical behavior of UO 2 2+ , Cr 3+ , and Ni 2+ . CV and SWV measurements revealed that Cr 3+ is reduced to metallic Cr through a two-step process, while Ni 2+ undergoes a one-step, two-electron process to form metallic Ni. UO 2 2+ is reduced to uranium dioxide via two successive one-electron transfer steps, and its reduction mechanism remains unaffected by the presence of Cr 3+ and Ni 2+ . Chronoamperometry was employed to study the influence of Cr 3+ on the nucleation mechanism of UO 2 2+ , which indicated that the addition of Cr 3+ could decrease the nucleation density of uranium dioxide. In addition, the effects of Cr 3+ and Ni 2+ on the electrodeposition of uranium dioxide were separately explored. In the presence of Cr 3+ , the deposited product contained only uranium dioxide and no Cr was deposited, but the current efficiency was reduced. Pulse electrolysis was carried out and found that current efficiency could be improved by pulse electrolysis in the presence of Cr 3+ . The introduction of Ni 2+ led to the co-deposition of uranium dioxide and Ni, while significantly accelerating the extraction rate of uranium dioxide. Thermodynamic analysis and experimental results indicate that this enhancement arises from the in situ reduction of UO 2 2+ by the deposited Ni, a process that proceeds much faster than the direct electrochemical reduction of UO 2 2+ .
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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
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产品关联
DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2016
·
IF 2.76
Ping Tan,Yongyou Hu,Qi Bi
A novel graphene oxide membrane (GOM) was prepared using the vacuum filtration-induced directional flow method. The properties of GOM were characterized by scanning electron microscope, X-ray diffraction instrument, transmission electron microscope, and Fourier transform infrared spectroscopy apparatus. The adsorptive properties of Cu 2+ , Cd 2+ and Ni 2+ onto GOM were systematically investigated in single, binary and ternary solutions by batch experiments. In a single system, the maximum adsorption capacities of Cu 2+ , Cd 2+ and Ni 2+ obtained by the Langmuir model were 1.21, 0.81 and 1.08 mmol/g, respectively. The isotherms results for Cu 2+ indicated that GOM exhibited good selectivity in the adsorption of Cu 2+ over Cd 2+ and Ni 2+ . The adsorption capacity followed the order of Cu 2+ > Ni 2+ > Cd 2+ in binary systems. For ternary system, the order of the adsorption capacity was Cu 2+ > Cd 2+ > Ni 2+ . Previously adsorbed metal ions on GOM could be displaced by subsequently adsorbed metal ions from the solution. The difference in hard and soft acids and bases of Cu 2+ , Cd 2+ and Ni 2+ solutions was identified as the main reason for GOM to be able to selectively adsorb favorable metal ions during competitive adsorption in binary systems. This interaction mechanism between the favorable component and other metal ions could be the primary cause of direct displacement.
研究领域:
环境科学
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材料科学
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产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2025
·
IF 9
Jianqiang Ye,Shixing Wang,Rong Zhu,Yihui Wu,Jiaxing Luo,Likang Fu,Gengwei Zhang,Guo Lin,Jingxiang Ma
In the zinc hydrometallurgical process, the deep removal of deleterious Ni 2+ and Co 2+ ions from zinc sulfate electrolytes remains a major challenge. This study introduces an ultrasonic-enhanced zinc powder replacement method as a green and efficient strategy to address this issue. The results demonstrated a remarkable enhancement in purification efficiency, with the removal rates of Ni 2+ and Co 2+ ions increasing by 14.01% and 13.92%, respectively, compared to the conventional method. Electrochemical analysis showed that ultrasonic treatment enhanced the potential difference of Ni 2+ and Co 2+ ions removal by zinc powder replacement, promoted the in-situ renewal of zinc anode surface, and thus improved the purification rate. This enhancement directly promoted the adsorption and desorption dynamics of the impurity ions on the zinc surface. Morphological characterization of the purified slag provided further evidence, showing that ultrasound effectively refined the zinc powder particles, increased their specific surface area, and intensified the solid-liquid interaction. Finally, electron paramagnetic resonance detection confirmed that ultrasound significantly enhanced the formation of strong reducing free hydrogen atoms, which actively contributed to the reduction and removal of Ni 2+ and Co 2+ ions. This work not only develops a viable purification strategy but also provides a comprehensive theoretical understanding of the ultrasonic enhancement mechanism, offering valuable guidance for achieving efficient separation in zinc sulfate electrolytes.
研究领域:
湿法冶金
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环境化学
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分离科学
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超声处理
·
电化学
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产品关联
DOI
高影响因子
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
·
2022
·Vol. 29
·期 51
·77536-77552
·
IF 5.19
Xue Yun,Cheng Wanting,Cao Meng,Gao Jianzhang,Chen Jiaqi,Gui Yunyang,Zhu Wenmin,Ma Fuqiu
In this paper, nitric acid-modified activated carbon was used as an electrode in the electrosorption process for the removal of Co 2+ , Mn 2+ , and Ni 2+ from wastewater. The effects of applied voltage, initial pH, and coexisting ions on removal efficiency were investigated. The adsorption process was evaluated by adsorption isotherm models. The results indicated that the electrosorption process was consistent with the Langmuir model, proving that the electrosorption process was a monolayer adsorption process. The maximum adsorption capacities of Co 2+ , Mn 2+ , and Ni 2+ were 131.58 mg/g, 102.04 mg/g, and 103.09 mg/g. Electrochemical tests revealed that the specific capacitance of AC-HNO 3 was 54.11 F/g when the scanning rate was 5 mV/s, while the specific capacitance of AC was 36.51 F/g. The Fourier transform infrared spectroscopy (FT-IR) and X-ray photoelectron spectroscopy (XPS) confirmed that the content of oxygen groups on the surface of activated carbon increased after modification, which provided more adsorption sites for electrosorption. When the selected concentration of HCl was used as the eluent, the elution efficiency of Co 2+ , Mn 2+ , and Ni 2+ could reach 94.23%, 93.65%, and 90.61%. The removal efficiency could reach more than 95% after three cycles. The results of the study can be used as a reference significance for the removal of cobalt, manganese, and nickel ions from heavy metal wastewater by electrosorption.
研究领域:
环境科学
·
材料科学
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DOI
PubMed
高影响因子
Energy Technology
·
2026
·Vol. 14
·期 8
·e70614
·
IF 3.6
Bing Zhang,Yu Zhang,Zhengxin Lu,Song Zhou,Ping Li,Kui Xu,Yonghua Chen
Electrocatalytic CO 2 reduction reaction (CO 2 RR) stands as a pivotal strategy for the selective conversion of CO 2 into high-energy-density hydrocarbons, offering a promising avenue for carbon neutrality. Cu-based electrodes have emerged as a highly potential platform for the production of diverse products, yet their practical application is hindered by the crystallization regulation of electrocatalysts achieving high selectivity for multielectron products. Here, we report Cu-based electrodes, deposited on carbon paper via facile one-step coelectrodeposition methods, for efficient electrocatalytic CO 2 RR. The introduction of trace Ni was found to smooth the surface of Cu-based electrocatalysts, thereby facilitating the electron transfer at the catalytic interface. For CuNi 0.3% electrode, a maximum Faraday efficiency of 30.5% and a CH 4 yield rate of 16.4 mg h −1 cm −1 were achieved at −1.4 V versus RHE, outperforming the Cu electrode (17.9% FE) and the CuNi 0.6% electrode (26.9%). This enhancement might be attributed to the superior surface of the CuNi 0.3% electrocatalyst, with the trace amount of Ni 2+ codeposition playing a critical role in optimizing the smooth surface of the Cu electrode. Density functional theory calculations further revealed that Ni addition is thermodynamically favorable for the deep hydrogenation of *CO by lowering the formation energies of *CO and *COH intermediates.
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产品关联
DOI
高影响因子
JOURNAL OF POWER SOURCES
·
2025
·
IF 7.9
Zhongsheng Liu,Taixing Zhang,Hejing Wen,Pengfei Hu,Lei Chen,Jia Qiao,Jianchun Wu,Jianhong Yang
Aluminum-ion batteries (AIBs) have garnered significant attention due to their high theoretical capacity, low cost, and high safety. However, finding suitable cathode materials is a challenge due to the complex energy storage mechanism of multivalent ions, which severely limits the practical applications of AIBs. Polyaniline (PANI) is widely used in rechargeable batteries, but its polymerization reaction causes several problems that limit its use in AIBs. To address the issue, PANI material coordinated with Ni 2+ (Ni-PANI) is synthesized by introducing NiCl 2 ·6H 2 O with chemical oxidation, compared with PANI as the cathode materials for AIBs. A better electrochemical performance with Ni-PANI cathode is displayed at a voltage range of 0.1–2.2 V in comparison with PANI. Furthermore, the effects of introducing Ni 2+ are investigated on the reaction mechanism through ex-situ characterization. The coordination of Ni element with N in PANI increases the interaction between the molecular chains of polyaniline, and improves the mechanical strength, thus affecting its cycling stability. At the same time, the conversion between different N structures increases and improves the adsorption of AlCl 2 + , presenting high electrochemical performance of AIBs. A new strategy is presented for the development of organic polymer cathode materials for AIBs.
研究领域:
材料科学
·
电化学
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产品关联
DOI
高影响因子
SURFACE REVIEW AND LETTERS
·
2016
·
IF 0.435
YUHUA YAN,ZHONGHUI ZHANG,MINGSHU XIAO,HUALAN ZHOU
A method was developed to conveniently and rapidly determine hydrogen peroxide (H 2 O 2 ) in food. The glassy carbon electrode (GCE) modified with agmatine sulfate (AS) easily anchoring nickel ion was attached to AS with polyamine structure. As a result, more Ni 2 + was obtained and transformed to Ni(OH) 2 /NiOOH on the AS–GCE, which caused the electrode to own much better electrocatalytic performance on H 2 O 2 . Based on these, the content of H 2 O 2 in thin sheet of bean curd sample was detected with standard addition method, by which good results were obtained.
研究领域:
分析化学
·
食品科学
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DOI
高影响因子
MATERIALS RESEARCH BULLETIN
·
2025
·
IF 5.7
Wenlong Liu,Jianbo Wang,Jiahua Wei,Di Li,Jin Zong,Qibin Yuan
In the field of multifunctional electronic components, multiferroic material which possesses both ferroelectricity and ferromagnetism has important application prospect. Here, the Bi 0.89 Tb 0.11 Fe 0.96 Mn 0.02 Co 0.02 O 3 /Zn 1-x Ni x Fe 2 O 4 (BTFMCO/ZN x FO) bilayer thin films ( x = 0.0, 0.1, 0.2, 0.3, 0.4) are fabricated by the sol-gel spin-coating technique. The influence of ZN x FO magnetic layer on the structural, dielectric, ferroelectric, and ferromagnetic properties of the bilayer thin films is systematically investigated. The BTFMCO/ZN 0.2 FO bilayer exhibits the lowest surface roughness (Ra=1.44 nm), a markedly reduced Fe 2+ concentration and minimized oxygen vacancy density, leading to a suppressed leakage current density of 3.7 × 10 –4 A/cm 2 at 200 kV/cm. Consequently, enhanced multiferroic properties with a ferroelectric remnant polarization (2P r ) of 118.5 µC/cm² and saturation magnetization (M s ) of 63.2 emu/cm³, respectively, are observed in the BTFMCO/ZN 0.2 FO sample. These findings reveal that interfacial modulation via Ni 2+ -doped ZN x FO layers is an effective strategy to simultaneously enhance ferroelectric and ferromagnetic performance.
研究领域:
材料科学
·
凝聚态物理
·
功能薄膜
·
多铁材料
·
磁电耦合
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产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Wei-Xiao Li,Meng-Jiao Liu,Xiao-Yuan Wu,Sa-Sa Wang,Weiming Wu,Can-Zhong Lu
Porous Ni 2+ -doped Co 3 O 4 nanosheets were prepared by a combination method of electrodeposition and post-calcination. The catalytic activities of the as-prepared samples for the electrocatalytic nitrate reduction to ammonia were evaluated. It was found that the Ni 2+ -doped Co 3 O 4 sample with a Ni 2+ doping content of 20 % exhibited higher catalytic activity as compared with other samples. The outstanding catalytic activity of the 20 % Ni 2+ -doped Co 3 O 4 sample could be attributed to its porous nanosheet structure with rich oxygen vacancies, which was confirmed by SEM, XPS, TEM, EPR and operando EIS analyses. The DFT results further revealed that the increased hydrogen generation energy and nitrate adsorption, and the diminished rate-determining step energy barrier ensured Ni 2+ -doped Co 3 O 4 exhibited outstanding activity for the electrocatalytic nitrate reduction. Moreover, membrane-less electrocatalytic nitrate reduction was coupled with methanol oxidation by using the oxygen vacancies-rich Co 3 O 4 electrocatalyst. The Faradic efficiencies for the electroreduction of nitrate to ammonia and the electrooxidation of methanol to formate could keep at 98 % and 99 % after multiple cycles, respectively, revealing a good stability of the reported hybrid system for the membrane-less electrocatalytic ammonia synthesis.
研究领域:
材料科学
·
电化学
·
催化化学
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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）