CHEMICAL ENGINEERING JOURNAL
·
2022
·
IF 16.744
Yuwei Ma,Guangtong Hai,Juming Liu,Jinxiao Bao,Yan Li,Ge Wang
Ni-doped cadmium sulfide (CdS) nanospheres with nickel phosphide (Ni 2 P) loading (Ni 2 P@CdS-Ni) were successfully prepared via the two-step thermal treatment growth and chemical reduction method in this work. Firstly, the thermal treatment method was applied to introduce the Ni 2+ into the lattice of CdS and induce the Ni-precursor loaded on surface of the CdS intimately. Then, the Ni-precursor was reduced into Ni(OH) 2 by using the chemical reduction process. Furthermore, the Ni 2 P were loaded on the CdS via the second thermal phosphorization reaction. The loaded Ni 2 P would evidently accelerate the transfer of photo-generated electrons between CdS-Ni and Ni 2 P and meanwhile effectively decrease the charges recombination. Moreover, the results of UV–vis DR spectra and density functional theory (DFT) calculations confirmed that Ni cations doped in the lattice of CdS lead to a doping level at the bottom of the conduct band, which narrowed the bandgap. The work function indicated that doped Ni 2+ helps to enhance the migration and separation of the photo-induced charge. Based on the synergistic effects, 3.7% Ni 2 P@CdS-Ni-3 presented a relatively high hydrogen evolution rate of 176.6 mmol h −1 g −1 under visible light irradiation (λ ≥ 420 nm), which is 63 times of the common CdS.
研究领域:
材料科学
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能源科学
·
化学工程
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DOI
高影响因子
ChemCatChem
·
2021
·Vol. 13
·期 24
·5148-5155
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IF 5.686
Wangxi Liu,Jianmin Chen,Xueling Pan,Tingting Wang,Yingwei Li
Graphical Sulfur vacancies and nickel dopants were simultaneously introduced into ultrathin ZnIn 2 S 4 nanosheets (ZIS NSs) to boost photocatalytic hydrogen evolution. Ni 0.05 −V S −ZIS reaches the highest photocatalytic hydrogen evolution rate of 8.91 mmol g −1 h −1 under visible light irradiation. The synergistic role of S vacancies and Ni dopants allows the photoexcited electrons in the CB to transfer to the trap state, thus delaying the recombination of photogenerated electrons and holes. Introducing vacancies and element doping are effective approaches to boost photocatalytic activities of metal sulfides. In this work, sulfur vacancies and nickel dopants were simultaneously introduced into ultrathin ZnIn 2 S 4 nanosheets (ZIS NSs) to explore their synergistic role in promoting photocatalytic hydrogen evolution. The S vacancies can trap the photo-generated electrons, lower the conduction band minimum (CBM), improve the photo-generated charge reduction capacity and prolong the carrier lifetime. Meanwhile, Ni dopants cause an increase in the Fermi level (E F ), which ensures a higher charge density and an effective carrier separation efficiency. The optimum hydrogen evolution rate of sample Ni 0.05 −V S −ZIS reaches 8.91 mmol g −1 h −1 under visible light due to the synergistic effect of the S vacancies and Ni dopants.
研究领域:
材料科学
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纳米技术
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光催化
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能源材料
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DOI
高影响因子
APPLIED ORGANOMETALLIC CHEMISTRY
·
2023
·Vol. 37
·期 4
·e7006
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IF 3.9
Xiaoxi Li,Jiajia Li,Dilnur Kurbanjan,Tianhao Yu,Hong Du
Oxygen evolution reaction (OER), as a multi-step coupled anode reaction, is more sluggish in kinetics than electrocatalytic hydrogen evolution reaction (HER). In order to overcome the potential barrier in OER, it is necessary to develop high-efficient non-noble metal catalysts for energy utilization. In this work, several NiCo-ZIF materials with different molar ratios of Ni and Co were prepared by doping Ni 2+ in the preparation of ZIF-67 via a simple room temperature stirring method. After that, NiCo-ZIF was calcined at 350°C in a muffle furnace to obtain corresponding Ni-doped Co 3 O 4 (Ni-Co 3 O 4 ). Ni-Co 3 O 4 catalyst exhibits a low overpotential (η ≈ 203 mV @10 mA cm −2 ), a small Tafel slope (111.0 mV dec −1 ) and prominent stability for OER in 1 M KOH solution, which is higher than for a commercially available Ir/C electrocatalyst (η ≈ 350 mV @10 mA cm −2 ). The higher electrochemical performance should be largely ascribed to the introduction of oxygen vacancies resulting from the Ni doping, which leads to the improved electrochemical active surface area (122.81 mF cm −2 ) and the topological structure of the dodecahedron, which is in favor of the good contact area between the catalyst and the electrolyte. The design and synthesis of ZIF-derived catalyst in this work create a significative method to prepare efficient OER electrocatalysts.
研究领域:
材料科学
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电化学
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能源转换与存储
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DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE
·
2021
·Vol. 56
·期 12
·7494-7507
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IF 4.22
Zhang Rui,Yuan Yaoxin,Zhang Jianfeng,Liu Haiyun,Chen Gang,Li Kun,Hong MengQing,Zuo Wenbin,Wang Chunlan,Yang Wen,Qin Zhenxing
Mn-doped perovskite CsPb(Cl/Br) 3 nanocrystals (NCs) have been widely explored due to their unique dual-color emission characteristics, which could reduce the usage of toxic Pb and introduce the exciton emission in blue region and the stable Mn 2+ emission peak in orange-red region via energy transfer from exciton to Mn 2+ emission. Although doping high concentration Mn 2+ could increase the Mn 2+ emission, excess Mn 2+ ions would be expelled from the host perovskite lattice. Doping secondary metal Ni into the NCs as an efficient method is always used to improve the Mn 2+ emission. We adopted a one-pot halogen injection into Cs-precursor under ambient environment method to prepare (Mn, Ni): CsPbCl 3 and (Mn, Ni): CsPb(Cl/Br) 3 NCs, which introduces NiCl 2 in the Mn: CsPb(Cl/Br) 3 NCs to supply enough halide ions and to passivate defect states or traps in the perovskite NCs so as to enhance Mn 2+ emission. Density Functional Theory (DFT) calculations were also conducted to explain our experimental results, which revealed that Ni 2+ doping could eliminate the in-gap deep defects of the CsPb(Cl/Br) 3 nanocrystals. In addition, the passivated lattice defects help to improve the stability of the perovskite NCs, preventing from electron beam irradiation.
研究领域:
材料科学
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光学
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DOI
高影响因子
Journal of Environmental Chemical Engineering
·
2025
·
IF 7.2
Qingfang Zhang,Jianghe Chen,Yuxin Zhou,Jianpeng Zhang,Xiangjing Zhang,Tianfeng Wang,Zuoyan Chen,Linhai Yang
As an environmentally friendly carrier, the non-toxic and non-hazardous nature of carbon nitride ensures that there is no secondary pollution of the environment during the application process, thus significantly enhancing the environmental sustainability of the overall process. In this study, carbon nitride was explored as a promising catalytic support for nickel doping, employing a pre-assembly strategy utilizing the bridging effect of 2-methylimidazole to introduce nickel atoms into the carbon nitride precursor uniformly. Subsequently, a tubular amorphous nickel-doped carbon nitride catalyst was successfully synthesized through a thermal polycondensation method. The material's morphological characteristics and physicochemical properties were characterized and analyzed using techniques such as XRD, TEM, and XPS. Ni/CN(4) samples exhibit the largest Fenton-like catalytic performance under neutral conditions, and the degradation of 50 mg/L phenol reaches 91.9 % within 1 h. The catalyst shows good catalytic activity within the initial pH= 4–11, and the degradation rate of phenol can still reach 85.5 % after 4 cycles of use. Free radical capture experiment and EPR results show that ¹O₂ and O₂•⁻ are the main active substances in the degradation process. The synthesized catalyst Ni/CN(4) uses 2-methylimidazole as an intermediate connecting the nickel source and supramolecular structure, so that the doped Ni can promote the directed polycondensation of the carbon nitdrive precursor, resulting in the formation of tubular structures. Nickel doping can introduce new active sites on the surface of carbon nitride, which can promote carbon nitride activated PMS to degrade phenol and have better durability in acidic or alkaline environments.
研究领域:
环境科学
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材料科学
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催化化学
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产品关联
DOI
高影响因子
RUSSIAN JOURNAL OF GENERAL CHEMISTRY
·
2025
·Vol. 95
·期 1
·239-252
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IF 0.8
Niu X.,Han D.,Zhang B.,He X.,Zhang Y.,Yan Z.
N -[3-(Trimethoxysilyl)propyl]ethylenediamine, tetraethyl silicate, nickel acetate, and sodium hydroxide solution were reacted through using anhydrous ethanol as the solvent and heated in a water bath to synthesize nickel-doped amino-modified silica adsorbent material (NDAMS). The structure of NDAMS was characterized by utilizing XRD, BET, FTIR, and XPS. The thermodynamics, kinetics and mechanism of luteolin adsorption on NDAMS were examined. The results exhibit that NDAMS achieves a 94.69% adsorption efficiency for luteolin at 298 K, demonstrating excellent adsorption performance. As the temperature increases, the adsorption amount rises, which conforms to the Langmuir model. The adsorption process aligns with the pseudo-second-order kinetic model, with an enthalpy (Δ H ) of 30.68 kJ/mol, entropy (Δ S ) of 198.70 J/(mol K), and Gibbs free energy (Δ G ) of –28.44 kJ/mol at 298 K. NDAMS may adsorb luteolin through a spontaneous, endothermic and monolayer chemisorption process, in which a bond is formed between the doped nickel atoms and the oxygen atoms in the luteolin’s phenolic hydroxyl group.
研究领域:
化学工程
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环境科学
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产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2023
·
IF 6.2
Zheng Wang,Jiawei Wang,Fumin Wang,Xubin Zhang,Xinyuan He,Shuai Liu,Zhengliang Zhang,Zhiwei Zhang,XingTao Wang
Elemental-doped is considered as an effective strategy to modulate the electronic structure of Metallic MoS 2 (i.e., 1T-MoS 2 ) and enhance its electrochemical performance. Herein, DFT is applied to predict the electronic structure of different transition metals (TMs) doped 1T-MoS 2 . Based on the results, stable Ni-doped 1T-MoS 2 (N 3 MS) is synthesized in a propionic acid (PA) aided system. Electrochemical tests show that N 3 MS possesses an excellent specific capacitance of 2461.2 F·g −1 at 1 A·g −1 and a cycle retention rate of 85.67 % at 10 A·g −1 for 1000 cycles due to the critical contribution of Ni-doped to electronic structure modulation. Meanwhile, in-situ Raman measurements show that the active sites of N 3 MS are Mo 3+ and Ni 2+ . The assembled N 3 MS//ZnO/ZnS-C hybrid device shows a specific capacitance of 242.28 F·g −1 at 1 A·g −1 , an excellent energy density of 65.96 Wh·kg −1 at the power density of 700 W·kg −1 and the excellent stability for up to 2000 cycles (77.26 % retention at 5 A·g −1 ). This work proves the significant contribution of elemental doping to modulate electronic structures and improve electrochemical performance.
研究领域:
材料科学
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电化学
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DOI
高影响因子
Functional Materials Letters
·
2021
·
IF 2.17
Biao Wang,Ya Liu,Xu Huai,Yuqing Miao
In order to develop non-noble metal-based electrocatalysts for glucose oxidation, the Ni-doped, urchin-like Bi 2 S 3 particles were prepared by a solvothermal method using the solvent of ethylene glycol/H 2 O. The obtained products were characterized by scanning electron microscopy, transmission electron microscopy, X-ray photoelectron spectroscopy and X-ray diffraction. The background signal from capacitance current is relatively low and the electrocatalytic oxidation current of glucose relatively high due to the urchin-like nanostructure of Bi 2 S 3 particles and high surface area where the presence of Bi also improves the electrocatalytic performance of Ni I I /Ni I I I shift.
研究领域:
材料科学
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电化学
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产品关联
DOI
高影响因子
Journal of Materials Chemistry A
·
2018
·Vol. 6
·期 14
·6065-6073
·
IF 9.931
Haoxiong Nan,Dai Dang,Xin Long Tian
The development of both effective and robust catalysts is crucial for the commercialization of polymer electrolyte membrane fuel cells since the reactivity and durability of the catalysts determine its ultimate lifetime and activity. Herein, we developed a facile approach for the synthesis of porous and hierarchical mono- or bi-metallic titanium nitride nanotubes (NTs), and this robust non-carbon material was used as the Pt support. The optimized catalyst (Pt/Ti0.9Ni0.1N NTs) demonstrated a mass activity of 0.78 A mgPt−1 and a specific activity of 1.3 mA cm−2 at 0.9 V (vs. RHE), which is roughly 3.6 times that of the commercial Pt/C catalyst. In particular, the catalyst exhibited excellent stability, such that the mass activity remained 3.2 times greater than that of pristine commercial Pt/C even after 15 000 continuous cycles at up to 1.2 V; in addition, the structure of the catalyst was perfectly maintained. The experimental data demonstrates that the hollow and porous structures, the strong metal-support interaction, and the synergistic effects derived from the nickel doping contribute to the improved performance and durability of the catalyst. This study paves the way for the rational synthesis of robust non-carbon catalysts that can be applied in a wide range of energy conversion processes.
研究领域:
材料科学
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能源工程
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催化化学
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产品关联
DOI
高影响因子
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
·
2021
·
IF 5.302
Yuqian Wang,Qiuyu Cheng,Peng Jiang,Lin Liu,Kunyang Cui,Yong Li
Solid solutions based on BaAl 12- x M x O 19 (M = Co 2+ , Ni 2+ ) showing intense blue shades were successfully synthesized by conventional solid state reaction. Then, novel zirconia ceramic materials with intense blue hues were then prepared upon addition of 5 wt% of the synthesized chromophore to a ZrO 2 white matrix containing 5 wt% Y 2 O 3 and sintered at 1400 °C for 6 h. The colors of the BaAl 12- x Co x O 19 or BaAl 12- x Ni x O 19 are due to the d-d transitions of Co 2+ or Ni 2+ in tetrahedral coordination, respectively. The colored zirconia ceramics were all indexed with tetragonal phase. The coexistence of the chromophore and ZrO 2 were observed by scanning electron microscopy and energy dispersive spectrometer. The hardness of the as-synthesized blue zirconia ceramic was slightly higher as compared to the pure undoped sample.
研究领域:
材料科学
·
无机化学
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产品关联
DOI
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
·
2022
·
IF 14.224
Can Liu,Yujie Li,Qi Liu,Jun Liu,Yafei Guo,Xiaoping Yu,Yingchun Xie,Tianlong Deng
The removal of 137 Cs from radioactive wastewater remains a huge challenge due to the interference of many coexisting ions. Several tin chalcogenides (X 2 Sn 3 Y 7 , X Na, K; Y Te, Se, S) were synthesized and screened for highly selective cesium removal from radioactive wastewater. It was found that Na 2 Sn 3 S 7 showed the best adsorption performance for low cesium concentrations. Especially after nickel doping, the adsorption capacity and thermal stability of the adsorbent were significantly enhanced. Its maximum adsorption capacity reached 436.72 mg·g −1 within only 5 min and adsorption performance kept active in the pH range of 2–12. After being coated with a porous polysulfone (PSF) fiber, the developed PSF-Na 2.1 Ni 0.05 Sn 2.95 S 7 was applied to natural complex water with cesium concentration of 17.58 mg·L −1 . The separation factors between Cs + and competitive ions ranged from 625.21 to 13123.21. It is noteworthy that NaNO 3 was an efficient regenerating agent and can be easily separated from the CsNO 3 mixture for cyclic utilization. Remarkably, only 45 min in each cycle of adsorption and desorption toward cesium was realized, and the adsorption properties hardly decreased even after 50 consecutive cycles. The above advantages make the proposed material an excellent candidate for efficient Cs + removal and enrichment from wastewater.
研究领域:
环境科学
·
材料科学
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产品关联
DOI
PubMed
高影响因子
CERAMICS INTERNATIONAL
·
2021
·
IF 4.527
Junhua Chen,Guo Feng,Feng Jiang,Li Yin,Qianqian Zhao,Shanfang Lan,XiaoJun Zhang,Jianmin Liu,Qing Hu,Weihui Jiang
Novel Ni-doped Al 2 TiO 5 emerald green ceramic pigments were successfully synthesized for the first time. Several characterization techniques (XRD, XPS , SEM, TEM, UV–Vis, and automatic colorimeters) were used to determine the phase composition and stability of the pigments, as well as the valence state of the doped nickel ion . The results show that nickel ion replaces the Al 3+ in the aluminum titanate lattice in the form of Ni 2+ , which reduces the distortion of the octahedral structure. Ni-doping of the aluminum titanate lattice produces an excellent coloring effect and significantly promotes the synthesis and stabilization of aluminum titanate. The novel pigments have excellent color stability while maintaining exceptional coloring performance and thermal stability in a base glaze synthesized at 1200 °C. These pigments show considerable potential for high-temperature applications.
研究领域:
材料科学
·
陶瓷工程
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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）