RSC Advances
·
2017
·Vol. 7
·期 13
·7906-7913
·
IF 3.108
Qingshuang Liang,Keke Huang,Xiaofeng Wu,Xiyang Wang,Wei Ma,Shouhua Feng
Ni2−xCoxP (0 ≤ x ≤ 2) nanocrystals (NCs) with good control of composition are synthesized by a facile economical approach. Low-cost air-stable triphenylphosphine is used as phosphorus source and NaBH4 is added to facilitate the reaction, which helps to carry out the reaction at relatively low temperature (250 °C). By modulating the Ni/Co precursor ratios, the composition of Ni2−xCoxP NCs can be tuned over the whole range. A comprehensive study of the key role of NaBH4 on the metal phosphide NCs formation reveals that NaBH4 can efficiently activate the triphenylphosphine, lowering the thermodynamic barrier for the P–C bond broken and thus reducing the reaction temperature. As-prepared Ni2−xCoxP NCs show Ni/Co-composition dependent catalytic performance on both hydrogen evolution reaction (HER) and oxygen evolution reaction (OER). In particular, OER catalytic activities follow the volcano relationship due to the synergistic effect. The Ni1.0Co1.0P NCs exhibit the highest OER catalytic activity with the overpotential of 0.34 V at a current density of 10 mA cm−2, among the top tier of water oxidation catalysts. In addition to providing a new green low-cost route to composition controllable synthesis of ternary phosphides, this work also contributes to fundamental guideline on rational design of low-cost high-efficient catalysts for water splitting.
研究领域:
材料科学
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电化学
·
催化化学
✓ 已验证
产品关联
DOI
高影响因子
RUSSIAN JOURNAL OF APPLIED CHEMISTRY
·
2022
·Vol. 95
·期 1
·143-153
·
IF 0.869
Jing Xiaohua,Sun Zhumei,Ren Jie,Chen Jing,Pan Donghui,Chen Yufei
Abstract Novel task-specific ionic liquids of [C 4 H 9 NH 3 ][P507], [C 6 H 13 NH 3 ][P507], [C 8 H 17 NH 3 ][P507], [C 10 H 21 NH 3 ][P507] and [C 12 H 25 NH 3 ][P507] were synthesized by one-step reaction. The 1 H NMR, 13 C NMR, FT-IR and mass spectra (MS) of the novel task-specific ionic liquids s were studied for analysis of their purities. The [C 4 H 9 NH 3 ][P507] has better performance of selective separation of Co 2+ from Ni 2+ in simulated sulfate solution due to the smaller different value between the radius of Co 2+ and the radius of [C 4 H 9 NH 3 ] + . The separation factor of Co 2+ from Ni 2+ was 522 using the three-stage cross flow extraction. A cleaner separation of Co 2+ from simulated solution containing 14 and 25 g/L of Co 2+ and Ni 2+ , respectively, was achieved using this process due to the unique properties of [C 4 H 9 NH 3 ] [P507].
研究领域:
化学工程
·
环境科学
✓ 已验证
DOI
高影响因子
Journal of Materials Chemistry C
·
2023
·Vol. 11
·期 26
·9014-9022
·
IF 6.4
Simin Gu,Bomei Liu,Shuaichen Si,Jing Wang
Laser-driven lighting technology is a remarkable innovation in the field of solid-state lighting. High-efficiency white light sources have been commercially produced, but laser-driven near-infrared (NIR) light source has not yet been captured, which hindered the numerous optoelectronic applications such as NIR spectroscopy and imaging techniques. Inspired by the observation that laser-driven lighting could break the limited power density and achieve effective output optical power density under higher incident optical power density, here, a novel NIR MgO:Cr3+,Ni2+ phosphor-in-glass film was prepared and combined on the sapphire substrate to fabricate laser-driven NIR light source. The results show that laser-driven NIR light source based on blue laser and MgO:Cr3+,Ni2+ phosphor-in-glass film combination could achieve a NIR output optical power density of 5.3 mW mm−2, which is 5 times higher than LED-driven NIR light source based on the same MgO:Cr3+,Ni2+ phosphor-in-glass film. Finally, we successfully demonstrated the potential applications of the as-fabricated laser-driven NIR light source in the field of night vision and high-penetration imaging. This finding provides an approach to achieving high-performance NIR light sources thereby opening up a new avenue for the exploration of NIR spectroscopy technology.
研究领域:
光学
·
材料科学
·
光谱学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2025
·
IF 6.3
Yaoyang Xia,Hao Xiang,Fu Wan,Ruiqi Liu,Kaida Hu,Yujie Zheng,Quan Zhou,Weigen Chen
Aqueous zinc ion batteries (AZIBs) with MnO 2 as the positive electrode have attracted extensive attention due to their high theoretical energy density. However, the dissolution of the positive electrode and the poor conductivity during the cycling process affect its development prospects. In this paper, δ-MnO 2 with larger interlayer spacing is adopted, and pre-intercalation of Ni 2+ is used to further expand its interlayer spacing to enhance the diffusion kinetics of Zn 2+ in the cathode. Density functional theory (DFT) calculations show that the charge distribution around Mn and O atoms will be changed to improve the conductivity of the MnO 2 cathode by the Ni 2+ intercalation. However, the intercalation of metal cations will lead to the production of more Mn 3+ . which will lead to further manganese dissolution. Therefore, we prepared a polyindole (PIn) coating layer with high conductivity and can effectively prevent cathode erosion by in-situ polymerization. The formation of a heterogeneous interface between PIn and MnO 2 surface not only provides more active electrochemical sites, but also enhances the conductivity of the cathode and reduces the occurrence of manganese dissolution, which greatly improves the cycle performance and specific capacity of the cathode. Ni-MnO 2 @PIn delivers a discharge capacity of 385 mAh g −1 at a current density of 0.1 A g −1 , and maintains a capacity of 278 mAh g −1 after 200 cycles at a current density of 0.3 A g −1 , with a capacity retention of 95 %.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2023
·
IF 15.1
Xiaotian Wang,Chenyu Yang,Pingzhou Wang,Chun Shen
The development of Ni-based catalyst with simultaneous outstanding catalytic performance and low cost and the exploration of nitrobenzene hydrogenation mechanism are in urgent need but still remain a severe challenge. Herein, a nickel phyllosilicate (Ni@Si) catalyst in which Ni species are stabilized by SiO x ligands is successfully prepared and applied in nitrobenzene hydrogenation to obtain aniline, exhibiting excellent catalytic performance (∼97.6% yield). A combination study reveals that the Ni 0 and Ni 2+ species cooperatively catalyze the reaction and govern the catalytic performance of the rate-determining step, namely N O group reduction. Specifically, Ni 0 species facilitates activation and dissociation of H 2 , while Ni 2+ species accounts for the adsorption of N O group via the lone electron pairs in oxygen. This work would pave the way to the rational design of efficient Ni-based catalysts and deepen the fundamental understanding for nitrobenzene hydrogenation.
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
POWDER TECHNOLOGY
·
2019
·
IF 3.413
Xinping He,Bing Yao,Yang Xia,Hui Huang,Yongping Gan,Wenkui Zhang
A novel efficient Ni 2+ adsorbent A-type zeolite is successfully synthesized. It is worth noting that the raw material used is the waste coal ash produced by local power plants. The ability of A-type zeolite to remove Ni 2+ from wastewater is up to 94%. In the study, the physical properties of zeolite are systematically characterized. In addition, we study in detail the effect of the external environment on the adsorption capacity of A-type zeolite. Moreover, the pseudo secondary kinetic model and Langmuir isothermal model evaluate the kinetic performance and isothermal equilibrium adsorption ability are better. The synthetic zeolite not only effectively uses the coal fly ash, but also realizes the sewage recycling. Therefore, the use of power plant coal fly ash to make adsorbent zeolite has potential practical significance.
研究领域:
环境科学
·
材料科学
·
废物管理
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2022
·
IF 16.744
Shun Zhang,Shiyu Miao,Xiaoqiang An,Huachun Lan,Huijuan Liu,Jiuhui Qu
Heterogeneous process with low mass transfer rate is limited in the treatment of large-volume Ni-containing wastewater. The homogeneous reaction provides a promising strategy to solve this problem, but phase transition process of Ni 2+ removal and its potential impact on activated sludge system are rarely explored. Herein, the Ni 2+ removal efficiency and process were firstly investigated in detail by using S-containing reagent with dithioamino groups. When the dosage of reagent concentration was controlled at 5–10:1(Ni), Ni 2+ can be rapidly and completely removed within 1 min. Additionally, other coexisting Cu 2+ , Co 2+ , Cd 2+ , and Pb 2+ could be synchronously removed with more reagent adding, while the typical organics (e.g., humic/citric acid) in water and high concentration of chemical oxygen demand (3800 mg L −1 ) in actual wastewater, exhibited negligible inhibition for Ni 2+ capture. The phase transition was visually investigated by charge coupled device camera and paticle size change. Experimental characterizations demonstrate that the dithioamino groups in capture reagent could efficiently chelate with Ni 2+ , which can be validated by the theoretical calculations. Vitally, the utilization of reagent cannot affect the nitrification activity of aerobic sludge system through short-term experiment and 29 months of operation while ensuring total Ni removal efficiency. These findings highlight an opportunity for using S-containing organic reagents to remove heavy metal ions from actual wastewater, especially in the application of the sewage treatment plant with bulky water.
研究领域:
环境科学
·
污水处理
·
化学工程
✓ 已验证
DOI
高影响因子
ENZYME AND MICROBIAL TECHNOLOGY
·
2020
·
IF 3.448
Ting Liu,Baoyou Pei,Jinqing Lin,Guangya Zhang
β-1,3-xylanase plays an important role in the conversion of algal biomass into renewable chemical commodities and functional xylooligosaccharides. Efficient immobilization of the target enzymes that could integrate the separation, purification, and immobilization in one-step may have great potentials. The cheap and easily obtained pitch was adopted as the raw material to prepare the hyper-cross-linked polymers with the specific surface areas of 560 m 2 /g and the Ni 2+ loading about 80 mg/g. As a carrier, it could immobilize and purify the β-1,3-xylanases directly from the crude cell debris with the activity recovery of (80.66 ± 0.87) %. The half-life of the immobilized β-1,3-xylanases was 50 min at 50 °C, which was significantly longer than the free ones with only 14 min. The immobilized β-1,3-xylanases could retain 65 % of the activity after stored at 30 ℃ for 80 h, they could also retain 87 % of the original activity after 15 cycles of reuse. In terms of potential applications in the manipulation of algae Caulerpa lentillifera , the immobilized β-1,3-xylanases could release 30 % more reducing sugar in 85 h. The method proposed here is promising for algal biomass manipulation because of its low cost, stable storage, convenient recycling and excellent reusability.
研究领域:
生物化学
·
可再生能源
·
酶工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
MATERIALS LETTERS
·
2014
·
IF 2.269
Ming Yan,Yan Yan,Chao Wang,Wei Lu,Weidong Shi
In this letter, Ni 2+ doped InVO 4 nanocrystals were successfully synthesized by a simple one-pot microwave-assisted method. The energy bandgap of obtained samples can be precisely controlled by varying the Ni 2+ doping amount. The O 2 production rate of obtained Ni–InVO 4 nanocrystals is higher than that of pure InVO 4 nanocrystals under visible-light, which can be ascribed to the narrowed band gaps. The corresponding 1% doped sample N1 has the highest O 2 production rate (394 μmol/h) in all samples, which is 66% higher than the undoped sample N0.
研究领域:
材料科学
·
环境科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL PAPERS
·
2020
·Vol. 75
·期 3
·1279-1289
·
IF 1.68
Yu Li,Chen Nanjun,Chen Wenjiao,Liu Cailin,Ren Xianyan,Yang Haijun,Lin Shudong
In Liquid Phase Catalytic Exchange (LPCE), the strength and hydrophobicity of styrene-divinylbenzene copolymer (SDB) carrier are key limitation factors for practical applications. In this paper, a surface-modified nano-SiO 2 (KH570-SiO 2 ) was used to improve the strength and hydrophobicity of SDB. Then, copolymerization of KH570SiO 2 with St, DVB to produce KH570-SiO 2 /SDB, Divinyl benzene (DVB), styrene (St) glycidyl methacrylate (GMA) to produce KH570-SiO 2 /GMA/SDB. The two kinds of new carriers were characterized by scanning electron microscope, static water contact angle, N 2 adsorption–desorption, transform infrared spectrometry and thermogravimetric analysis. Compared with SDB, both KH570-SiO 2 /SDB and KH570SiO 2 /GMA/SDB show better performances, such as a higher hydrophobicity(147° and 145°, respective), a higher strength(107.11 N and 115.37 N, respectively), a better thermal stability(373.8 and 435.67 ℃, respectively), and a larger specific surface area(487.253 and 463.673 m 2 /g, respective). The Nickel ion was uesd as the model ion of Platinum ion. And then the Ni 2+ adsorption performances of KH570-SiO 2 /SDB and KH570-SiO 2 /GMA/SDB were studied. Experiments show that KH570-SiO 2 /GMA/SDB has a much higher adsorption rate and a bigger adsorption amount. Refinement indicates that the adsorption behaviors of SDB, KH570-SiO 2 /SDB and KH570-SiO 2 /GMA/SDB with Ni 2+ are according to pseudo-first-order kinetic. The adsorption of SDB and KH570-SiO 2 /GMA/SDB obeyed Freundlich isotherm, while the adsorption of KH570-SiO 2 /SDB obeyed Langmuir isotherm.
研究领域:
材料科学
·
环境科学
·
化学工程
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2022
·
IF 16.744
Bo-Mei Liu,Xiao-Xuan Guo,Lu-Yu Cao,Lin Huang,Rui Zou,Zhi Zhou,Jing Wang
The development of phosphor-converted light-emitting diodes (pc-LEDs) in the second near-infrared window (NIR-II, 1000–1700 nm) represents an important, newly emerging, and dynamic field in NIR spectroscopy. Unfortunately, lacking efficient NIR-II phosphors that can be excited by commercial blue LED chips impedes NIR spectroscopy applications. Herein, a donor–acceptor strategy is developed by introducing Cr 3+ sensitizers to greatly enhance the blue-light excitation efficiency of NIR-II-emitting MgO:Cr 3+ ,Ni 2+ phosphor. Consequently, a high-efficiency blue-light-excitable MgO:Cr 3+ ,Ni 2+ phosphor that gives a NIR-II emission at 1335 nm with a full width at half-maximum (FWHM) of 235 nm, is demonstrated. The product has a high internal quantum efficiency of 92.7 % and excellent thermal stability, maintaining 83.0 % of the room temperature emission intensity at 150 °C. Excitingly, the fabricated NIR-II pc-LED device shows a high NIR-II optical power (27.4 mW@350 mA). The performances of the achieved NIR-II pc-LED are almost the best results until now. Additionally, multifunctional applications including nondestructive detection and anti-counterfeiting of the NIR-II light source are demonstrated. These results are pretty crucial for the further development of NIR-II spectroscopy and imaging technology.
研究领域:
材料科学
·
光学工程
·
光谱学
✓ 已验证
DOI
高影响因子
ADVANCED POWDER TECHNOLOGY
·
2018
·
IF 2.943
Xiaoli Zhou,Qinghua Yang,Huanping Wang,Feifei Huang,Junjie Zhang,Shiqing Xu
Ni doped ZnS nanopowders were synthesized by hydrothermal method. The as-synthesized ZnS nanopowders possessed zinc blende structure with the particle sizes of ∼20 nm, and they display a broad emission band from 400 nm to 700 nm centered at ∼540 nm. The influence of Ni 2+ doping and vacuum annealing on the structure, morphology and optical properties was investigated systematically. The results revealed that the emission peaks are blue shifted with Ni 2+ doping, and the emission peaks of 0.2, 0.4, 0.6, 0.8 and 1.0 mol% Ni 2+ doped ZnS nanopowders are centered at ∼520, ∼ 510, 500, 490 and 470 nm, respectively. While, the zinc blende phase transformed to wurtzite phase when annealing at 600 °C or higher, and the annealed samples exhibited three emission peaks positioned at ∼490, ∼547 and ∼580 nm. The results indicated that the as prepared Ni 2+ -doped ZnS nanopowders have a potential application in LED as light conversion layer.
研究领域:
材料科学
·
光学
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）