ACS Applied Materials & Interfaces
·
2025
·
IF 8.2
Mingchen Xu,Xinfa Zhu,Gaoning Fan,Xiyu Jia,Yonghui Zhang,Mengjun Wang,Hongxing Zheng,Pengyu Zhou,Chao Fan
Visible photodetectors based on two-dimensional tin disulfide (SnS2) have attracted interest for applications in optical communication, information capture, and military reconnaissance owing to their high absorption efficiency, atomic-scale thickness, and nontoxicity. However, their intrinsic bandgap limits their spectral detection range, hindering further practical applications. Herein, we introduce VIII B-nickel (Ni) with a similar ionic radius to Sn to form Ni-doped SnS2 few-layers via micromechanical exfoliation. As the Ni-doping concentration increases, the bandgap decreases from 2.14 (SnS2) to 1.95 eV (Sn0.9Ni0.1S2). Subsequently, Ni-doped SnS2-based photodetectors are fabricated and characterized. These devices exhibit an extended spectral detection range and excellent performance, with a maximum responsivity of 2009 A W–1 and high normalized detectivity of 2.47 × 1012 cm Hz1/2 W–1. Furthermore, to suppress dark current and noise, SnS2/Ni-doped SnS2 homostructures and their corresponding photodetectors are fabricated. The built-in electrical field of the homostructure effectively reduces the dark current of the homostructure photodetector to 110 nA. Consequently, the responsivity is enhanced to 3350 A W–1 and the response time is reduced to 3.5 ms, outperforming most other 2D material–based and commercial photodetectors. And Ni-SnS2 VPDs show an application potential in imaging and visible-light communication systems. Thus, this study presents an effective approach to extend the detection spectrum of SnS2-based photodetectors and pave the way for their future applications.
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高影响因子
MOLECULES
·
2024
·Vol. 29
·期 9
·2092
·
IF 4.2
Zhi Lu,Shilin Li,Laiyuan Ning,Kun Tang,Yifan Guo,Long You,Chong Chen,Guangxin Wang
Developing high-performance and cost-competitive electrocatalysts have great significance for the massive commercial production of water-splitting hydrogen. Ni-based electrocatalysts display tremendous potential for electrocatalytic water splitting. Herein, we synthesize a novel NiFe-layered double hydroxide (LDH) electrocatalyst in nanosheets array on high-purity Ni foam. By adjusting the Ni/Fe ratio, the microstructure, and even the behavior of the electrocatalyst in the oxygen evolution reaction (OER), changes significantly. The as-obtained material shows a small overpotential of 223 mV at 10 mAcm−2as well as a low Tafel slope of 48.9 mV·dec−1in the 1 M KOH electrolyte. In addition, it can deliver good stability for at least 24 h of continuous working at 10 mAcm−2. This work proposes a strategy for engineering catalysts and provides a method for the development of other Ni-based catalysts with excellent performance.
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高影响因子
MOLECULES
·
2024
·Vol. 29
·期 16
·3966
·
IF 4.2
Zhi Lu,Shilin Li,Yuxin Wang,Jiefeng Wang,Yifan Guo,Jiaqi Ding,Kun Tang,Yingzi Ren,Long You,Hongbo Meng,Guangxin Wang
Water splitting is an important approach to hydrogen production. But the efficiency of the process is always controlled by the oxygen evolution reaction process. In this study, a three-dimensional nickel–molybdenum binary nanoarray microstructure electrocatalyst is successfully synthesized. It is grown uniformly on Ni foam using a hydrothermal method. Attributed to their unique nanostructure and controllable nature, the Ni-Mo-based nanoarray samples show superior reactivity and durability in oxygen evolution reactions. The series of Ni-Mo-based electrocatalysts presents a competitive overpotential of 296 mV at 10 mA·cm−2for an OER in 1.0 M KOH, corresponding with a low Tafel slope of 121 mV dec−1. The three-dimensional nanostructure has a large double-layer capacitance and plenty of channels for ion transfer, which demonstrates more active sites and improved charge transmission. This study provides a valuable reference for the development of non-precious catalysts for water splitting.
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Small
·
2024
·
IF 13
Zhipeng Liu,Jinling Xue,Yibin Fan,Yinshi Li
Rational design of efficient and non-noble metal bifunctional catalysts for alkaline overall water splitting (OWS) electrochemical reactions is of top priority in the development of hydrogen-based energy. Constructing catalysts with unique structures to optimize the intrinsic activity is a promising strategy. In this work, a newly developed Ni 3 Co 3 Mo 100 -BTC-15h catalyst consisting of Ni nanoparticles enriched on the surface along with a core-shell porous structure is prepared via a hydrothermal process. Due to the unique composition and Ni-enriched core–shell structure, the Ni 3 Co 3 Mo 100 -BTC-15h catalyst exhibits enhanced electrocatalytic properties for both the oxygen evolution reaction (OER) and hydrogen evolution reaction (HER) in alkaline media. Under the dual tuning and intermetallic phase, the Ni 3 Co 3 Mo 100 -BTC-15h catalyst deliver a lower overpotential of 151 mV and ≈ 136 mV exceeding commercial catalysts for OER and HER. When the Ni 3 Co 3 Mo 100 -BTC-15h is used as bifunctional catalyst for OWS in a two-electrode alkaline electrolyzer, a cell voltage of 1.62 V is required to drive 10 mA·cm −2 comparable to that of commercial Pt/C and RuO 2 catalysts. This work proposes a potential strategy for optimizing the electrocatalytic performance of non-noble metal catalysts for OWS.
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2024
·
IF 9.4
Bohao Kong,Hefeng Yuan,Zhehao Liu,Zizai Ma,Xiaoguang Wang
Engineering platinum-free catalysts for hydrogen evolution reaction (HER) with high activity and stability is essential for electrochemical hydrogen production . In this paper, we report the synthesis of cobalt-doped AlNi 3 /NiO (Co-AlNi 3 /NiO) electrode with three-dimensional nanoporous structure via chemical dealloying method. Density functional theory (DFT) calculations reveal that Co-AlNi 3 /NiO can accelerate water adsorption / dissociation and optimize adsorption–desorption energies of H* intermediates, thus improving the intrinsic HER activity. Both the introduction of Co and Al can efficiently ameliorate the electronic density around Ni sites of NiO and AlNi 3 , which can effectively reduce the energy barrier towards Volmer–Heyrovsky reaction and thus synergistically promote the hydrogen evolution. Benefiting from the large electrochemical active surface area , high electrical conductivity and electronic effect, the nanoporous Co-AlNi 3 /NiO catalyst exhibits remarkable HER activity with an overpotential of 73 mV at a current density of 10 mA cm −2 in alkaline condition, outperforming most of the reported non-precious metal catalysts . The nanoporous Co-AlNi 3 /NiO catalyst can operate continuously over 1000 h at high current densities with a robust stability. This work provides a new vision for the development of low-cost and efficient electrocatalysts for energy conversion applications.
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高影响因子
APPLIED SURFACE SCIENCE
·
2018
·
IF 4.439
Xiaoqin Wang,Qiaoqin Li,Yong Zhang,Yufei Yang,Zhi Cao,Shanxin Xiong
A novel synthesis approach of N-doped porous carbon (NPC)/NiO composites possessing some honeycomb-shaped nanoporous carbon and plentiful NiO nanosheets is exploited. First NPC/Ni composites are achieved with NPC yield of 52.9% through a catalytic pyrolysis method, using coal-based polyaniline particles prepared by an in-situ polymerization method as a carbon and nitrogen source, and nickel particles as a catalyst, respectively. Next NPC/NiO composites are achieved unexpectedly with plentiful NiO nanosheets and N content of 1.00 wt% after a liquid oxidation process. In NPC/NiO composites, porous carbon mainly presents in the amorphous state, while the incorporated nitrogen mainly presents in the form of pyrrolic N (92.9 at.%) and oxidized N (7.1 at.%). Plentiful NiO nanosheets are embedded in the pores or on the NPC surface. 33.3 at.% Ni 2 O 3 components exist in the surface of NiO nanosheets. NPC/NiO composites possess not only rich micropores, but also significant mesopores and nanoscale macropores. The BET specific surface area, BET average pore width and BJH adsorption average pore diameter are 627.5 m 2 /g, 2.0 nm and 5.1 nm, respectively. NPC/NiO composites demonstrate a high specific capacitance of 404.1 F/g at 1 A/g, and a good cycling stability maintaining high specific capacitance of 212.4 F/g (84.3% of the initial capacitance) at 5 A/g after 5000 cycles of charge and discharge, attributed to some honeycomb-shaped nanopores of carbon and large specific surface area of NiO nanosheets, and the synergistic effects between electric double-layer capacitance of NPC and pseudocapacitance of NiO. This study may provide a novel approach for the value-added applications of low-rank coal.
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JOURNAL OF ELECTRONIC MATERIALS
·
2017
·Vol. 47
·期 6
·3248-3253
·
IF 1.579
Chen Jun-Liang,Liu Chengyan,Miao Lei,Gao Jie,Zheng Yan-yan,Wang Xiaoyang,Lu Jiacai,Shu Mingzheng
With excellent high-temperature stability (up to 1000 K) and favorable electrical properties for thermoelectric application, TiNiSn-based half-Heusler (HH) alloys are expected to be promising thermoelectric materials for the recovery of waste heat in the temperature ranging from 700 K to 900 K. However, their thermal conductivity is always relatively high (5–10 W/mK), making it difficult to further enhance their thermoelectric figure-of-merit ( ZT ). In the past decade, introducing nano-scale secondary phases into the HH alloy matrix has been proven to be feasible for optimizing the thermoelectric performance of TiNiSn. In this study, a series of TiNiSn-based alloys have been successfully synthesized by a simple solid-state reaction. The content and composition of the heterogeneous phase (TiNi 2 Sn and Sn) is accurately regulated and, as a result, the thermal conductivity successfully reduced from 4.9 W m −1 K −1 to 3.0 Wm −1 K −1 (750 K) due to multi-scale phonon scattering. Consequently, a ZT value of 0.49 is achieved at 750 K in our TiNiSn-based thermoelectric materials. Furthermore, the thermal stability of TiNiSn alloys is enhanced through reducing the Sn substance phase.
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NANO
·
2018
·
IF 1.1
Xiaojun Tao,Shuang Wang,Yanbao Zhao,Zhiwei Li
In this paper, a facile one-pot bottom-up approach for the preparation of graphene and Ni/graphene nanostructures at normal pressure and low temperature (150 ∘ C) has been developed. The graphene and Ni/graphene nanostructures were prepared by reducing hexachloro-benzene (C 6 Cl 6 ) with potassium in n -tetradecane (C 1 4 H 3 0 ) solution without the presence of a catalyst. Meanwhile, the effect of Ni content on the specific surface area (SSA) of the final products was investigated. The testing results display that the as-prepared samples have large SSA and high C/O ratio, implying that the designed synthesis method is simple and efficient. To evaluate the adsorption performances of the samples, we select organic dye rhodamine B (RhB) as the model organic contaminant in aqueous solutions. The experimental results show that the samples possess high adsorption capacity ( q max mg g − 1 ) , ultrafast adsorption rate ( > 9 9 %, 2 min), high adsorption efficiency ( ≥ 9 9 . 8 %) and good chemical stability in a wide pH range (2–11), high salt tolerance ( > 8 0 mg mL − 1 ) , and good reusability ( > 9 9 . 5 %, 9 cycles) for dye RhB from water. In particular, the samples exhibit a good property for the treatment of the raw industrial wastewater (RIW).
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INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2017
·
IF 2.843
Hai-Bo Zhao,Zhi-Bing Fu,Xue-Yi Liu,Xiao-Cao Zhou,Hong-Bing Chen,Ming-Long Zhong,Chao-Yang Wang
Novel magnetic and conductive Ni/carbon aerogels have been successfully fabricated through an autocatalytic reduction process. The resultant Ni/carbon aerogels have nanoporous structure with high specific surface area, low densities, appropriate electrical conductivities and controllable magnetization. Due to these special attributes, the aerogel composites are demonstrated to be a great microwave absorbent possessing strong and controllable EM absorption with ultrathin thickness. Only with filler loading of 10 wt % in the wax, a minimum RL of −57 dB is found at 13.3 GHz with the thickness of 2 mm. Even with the thickness of 1.5 mm, the Ni/carbon aerogel-3 composite can exhibit the low RLmin value of −32 dB and wide effective EM absorption bandwidth of 4.0 dB. The synergistic effect of the medium dielectric loss, weak magnetic loss and good impedance match, accounts for the high microwave absorption performance.
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JOURNAL OF MEMBRANE SCIENCE
·
2024
·
IF 8.4
Wangli Yao,Tian Liu,Jingxian Zheng,Saitao Yan,Baoliang Chen,Xiaoying Zhu
Conventional catalytic membranes often exhibit inadequate catalytic efficiency due to limited retention time for pollutants during filtration. In this study, a single-atom catalyst (Ni-NG) was prepared by dispersing single nickel atoms onto nitrogen-doped graphene oxide sheets. Subsequently, under controlled conditions, the assembly of Ni-NG with reduced graphene oxide (rGO) sheets led to the fabrication of efficient electrocatalytic cathodic membranes (ECMs). The ECMs were designed to concentrate and dehalogenate antibiotics simultaneously by utilizing the confined single nickel atoms within the multilayered ECMs through electrocatalytic reduction. Remarkably, complete degradation of chloramphenicol (CAP, 20 mg L −1 ) in the solution was achieved within a remarkably short time of 3.0 ms by ECM8 which had an area of 7.1 cm 2 and comprised Ni-NG (16.9 μg) and rGO (16.9 μg), with an interlayer spacing of 0.37 nm, during filtration (40 L m −2 h −1 ). The reaction rate constant (k) for CAP degradation by ECM8 was approximately 3 × 10 8 min −1 , surpassing the highest value in the literature. Furthermore, the ECM demonstrated both high energy efficiency and stability, highlighting the great potential for practical applications. The electrocatalytic cathodic membrane, designed to primarily concentrate pollutants in confined interlayer spaces through the sieving effect, shed lights on the highly efficient dehalogenation of organic compounds in pharmaceutical salt-laden wastewater.
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SEPARATION AND PURIFICATION TECHNOLOGY
·
2025
·
IF 9
Kuang Wang,Zhanqiang Fang
In this work, a cost-effective ball-milling technique was employed to synthesize submicron oxalated zero-valent iron co-doped with graphite and nickel (G@Fe OX bm /Ni), aiming to enhance the removal efficiency of the recalcitrant pollutant 2, 2′, 4, 4′ – tetrabromodiphenyl ether (BDE-47) while minimizing secondary risks. The incorporation of graphite significantly improved the debromination efficiency of BDE-47, with a rate constant of 0.26 day −1 in a tetrahydrofuran/water system, which represents a 59.88 % increase over the oxalated zerovalent Fe/Ni without graphite (0.16 day −1 ). The determination of Ni leaching showed that no nickel ions were detected post-reaction over a broad pH range (3–11). Moreover, the reactivity of G@Fe OX bm /Ni was largely unaffected across the pH range (0.26–0.49 day −1 ), exhibiting excellent resistance to acidic and alkaline conditions. In both ultrapure water and real groundwater matrices, the degradation rate constants for BDE-47 increased to 2.98 day −1 and 0.79 day −1 , respectively, achieving debromination yields of 97.86 % and 50.18 % for the final product, diphenyl ether. Based on the established degradation pathway and electrochemical analysis, the debromination of BDE-47 follows a catalytic debromination and hydrogenation process by adsorbed atomic hydrogen (H* ADS ). The graphite doping enhanced the debromination of BDE-47 by increasing the production of H* ADS . The adsorption effect of graphite on metal ions effectively controlled secondary pollution and improved the material’s tolerance to acidic and alkaline environments. This work offers an efficient method for the degradation of low brominated diphenyl ether pollutants at a low cost and without secondary risks.
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ENVIRONMENTAL POLLUTION
·
2024
·
IF 7.6
Kuang Wang,Zhanqiang Fang
In the homologous series of polybrominated diphenyl ethers (PBDEs), the debromination of low-brominated diphenyl ethers with higher toxicity remains a challenge. Nano zero-valent iron (nZVI) has been extensively studied for the debromination of PBDEs, but its inherent direct electron transfer mechanism is less efficient for low-brominated diphenyl ethers, and there are issues with high preparation costs. In this work, we synthesize Ni-doped oxalated submicron ZVI (Fe OX bm /Ni) using a low-cost ball-milling method. Fe OX bm /Ni exhibits a debromination rate constant of 0.48 day −1 for 2,2′,4,4′-tetrabromodiphenyl ether (BDE-47) in tetrahydrofuran (THF)/water. The debromination rate of Fe OX bm /Ni for BDE-47 in water is even faster (0.98 day −1 ), with the yield of the complete debromination product, diphenyl ether, reaching 76.71%. In real groundwater, Fe OX bm /Ni also shows high reactivity toward BDE-47, with a rate constant of 0.33 day −1 . Kinetic experiments, quenching experiments, and degradation pathway indicate that the attack of atomic hydrogen on C-Br bonds is the primary degradation mechanism. Electrochemical analysis further show that Ni 0 sites could cleave hydrogen into absorbed atomic hydrogen (H∗ ABS ) and adsorbed atomic hydrogen (H∗ ADS ), with H∗ ADS playing the main role. These findings contribute valuable insights into advancing the large-scale application of ZVI and offer promising strategies for thorough remediation of PBDEs pollution.
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危险品化学品经营许可证（带存储）