JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2017
·Vol. 28
·期 23
·18145-18153
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IF 2.019
Hao Meifeng,Fa Dejuan,Qian Lihong,Miao Yuqing
By one step hydrothermal reaction, the ultrafine nanoparticles of Bi 2 WO 6 /NiWO 4 were prepared with the particle size smaller than 5 nm. They dispersed very well in solution and exhibited excellent photocatalytic efficiency for the degradation of Rhodamine under visible light, UV light and natural solar light respectively. Under visible light irradiation for 30 min, the model dye Rhodamine B (Rh B) nearly completely degraded. For natural solar light irradiation, only 10 min observed the complete degradation of Rh B. This provides new nanocomposites for efficient photo-driven degradation of organic dyes under visible or natural solar light irradiation.
研究领域:
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
ELECTROCHIMICA ACTA
·
2022
·
IF 7.336
Yaoxia Yang,Lan Zhang,Fengyao Guo,Dangxia Wang,Xingwei Guo,Xiaozhong Zhou,Dongfei Sun,Zhiwang Yang,Ziqiang Lei
Electrocatalytic hydrogen evolution reaction by water splitting is deemed to a clean and efficient approach for greener energy. The intensive pursuit of cost-effective and stable electrocatalysts for HER is quite imperative and challenging. Herein, a typical core-shell NiWO 4 @NiCoO x S y /NCF nano-architecture consisted of NiCoO x S y /NCF octahedrons and NiWO 4 nanoparticles on nickel-cobalt foam is synthesized, and the NiWO 4 @NiCoO x S y /NCF requires quite small overpotential of 85 mV to afford current density of 10 mA cm −2 for HER in 1 M KOH, respectively, while NiCoO x S y /NCF shows the overpotential of 132 mV at the current density of 10 mA cm −2 in 0.5 M H 2 SO 4 . Moreover, they still present good durability with continuous operation of 72 h in alkaline and acidic electrolytes, outperforming most of the non-noble bimetallic oxides or sulfides electrocatalysts. The prominent performance benefits from NiWO 4 @NiCoO x S y /NCF takes advantages of component respective strengths such as interfacial cooperative effect, strong electrical connection and fast electron transfer, the highly exposed surface area, in situ surface reconstruction. The work provides a new prospect toward the controlled design and rational fabrication of multicomponent hierarchical core-shell structure electrocatalyst in high-performance flexible electrochemical hydrogen production.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
SOLID STATE SCIENCES
·
2017
·
IF 1.811
Meifeng Hao,Xiangrui Meng,Yuqing Miao
The NiWO 4 powder crystals were synthesized by a simple hydrothermal method . It is found that the morphologies of most of NiWO 4 particles are the polyhedron including cube, decahedron and dodecahedron et al. The typical cubic structures show the side length around 3 μm. SEM, TEM, XRD , FTIR and UV-vis were employed to characterize the NiWO 4 powder crystals. The band gap value of 1.48 eV was calculated according to UV-vis. The NiWO 4 powder crystals exhibit high photocatalytic activity toward the degradation of Rh B under both UV and visible irradiations. Especially, under UV, only 17% Rh B remains after 40 min UV photodegradation and only 80 min is needed for the complete degradation.
研究领域:
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2022
·
IF 7.139
Liya Fan,Jaka Sunarso,Xiao Zhang,Xianqiang Xiong,Li He,Lixia Luo,Fangling Wang,Ziwei Fan,Chenglin Wu,Deman Han,Ngie Hing Wong,Yong Wang,Guihua Chen,Wei Chen
The electrocatalyst coupling with CuWO 4 has resulted in a comparable or worse performance when compared to the bare CuWO 4 . This work attempts to address this challenge by coupling CuWO 4 with NiWO 4 electrocatalyst that can form a Type-II heterojunction with a suitable energy-level alignment allowing for effective hole transfer from CuWO 4 to NiWO 4 electrocatalyst. We applied thermal annealing to the WO 3 nanoplates by adding Cu(NO 3 ) 2 and Ni(NO 3 ) 2 precursors to obtain the CuWO 4 /NiWO 4 composite with common anions. A high surface-to-volume ratio, perfect interface lattice match, suitable energy level alignment, and high electrocatalytic activity were exhibited in the composite. These characteristics led to a 100 mV negative shift on the onset potential compared to the pure CuWO 4 photoanode. Moreover, it featured a 0.7-fold higher photocurrent density than that of the pure CuWO 4 photoanode. Only 9% of photocurrent density decreased after 4 h of photo-irradiation, demonstrating excellent photostability. Our mechanism study demonstrated that NiWO 4 could act as a semiconductor to form a Type-II heterojunction with CuWO 4 , promoting hole transfer from the CuWO 4 valence band to the NiWO 4 . Meanwhile, the NiWO 4 effectively injects the separated holes into the water solution as a promising electrocatalyst, thus enhancing the overall water splitting performance. This work provides an important design consideration by focusing on the corrected level alignment and lattice match for developing the CuWO 4 /electrocatalyst system to work effectively.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
JOURNAL OF ELECTRONIC MATERIALS
·
2021
·Vol. 50
·期 12
·7240-7249
·
IF 1.938
Tang Jing,Chen Mingming,Xu Hui
Zn ion-doped amorphous NiWO 4 nanospheres (named ZNWO) were successfully synthesized using a simple chemical coprecipitation method. The specific surface area and pore size of NiWO 4 were significantly improved owing to the Zn atom dopant. Compared with NiWO 4 , the conductivity of ZNWO increases and, more importantly, the energy gap decreases. This is mainly because Zn atoms are used as dopants to generate energy levels in the forbidden band of NiWO 4 , which decreases the energy absorption of electronic transitions. When tested under a traditional three-electrode system, the obtained Zn-doped NiWO 4 with 10 at.% Zn (labeled ZNWO-10) delivered an impressive specific capacitance of 653.75 F g -1 at a current density of 1 A g −1 , with a capacitance retention of 64.1% at 1 A g -1 over 1000 cycles. However, pristine NiWO 4 displayed an inferior capacitance retention of 6.4% under the same conditions. Studying confirms the availability of electronic structure control in NiWO 4 by introducing Zn atoms for pseudocapacitance (PC). When it is combined with an activated carbon (AC) electrode, the ZNWO//AC device exhibits a maximum energy density of 34.4 W h kg -1 at a power density of 525 W kg -1 and excellent cycling stability, with 116.3% retention after 1000 cycles. This study provides new options and an important foundation for application in asymmetric supercapacitors.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA
·
2022
·
IF 3.752
Yong-ping CUI,Ya-ru SHANG,Rui-xia SHI,Quan-de CHE,Jun-peng WANG
The heterostructured NiWO 4 /WO 3 nanotubes (Ni/W NTs) were synthesized by using a facile self-assembly method on the sacrificial polystyrene (PS) nanofibers templates. Then, the Pt-decorated NiWO 4 /WO 3 (Pt@Ni/W) composite NTs were obtained through using an ultrasonic mixing method. The experimental results display that the order of gas-sensing performance is Pt@Ni/W>Ni/W>WO 3 . The 2wt.%Pt@Ni/W-5 NTs indicate the supreme acetone-sensing response ( R air / R gas =58.4 at 100×10 −6 ) at 375 °C, which is 10.6 and 1.53 times that of the WO 3 and NiWO 4 /WO 3 NTs, respectively. Additionally, the 2wt.%Pt@Ni/W-5 NTs also exhibit the dramatically high selectivity toward acetone against ethanol, methanal, methanol, NH 3 and toluene. The Pt-decorated Ni/W NTs show the excellent responsivity and stability toward acetone, which is ascribed to the construction of heterostructured NiWO 4 /WO 3 and the spill-over effect of Pt nanoparticles.
研究领域:
材料科学
·
纳米技术
·
传感器
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2019
·
IF 6.361
Xin Guo,Menggang Li,Yequn Liu,Yarong Huang,Shuo Geng,Weiwei Yang,Yongsheng Yu
Rational construction of MnCo 2 O 4 -based core-shell nanomaterials with distinctive and desirable architectures possesses great potential in the advanced electrode material of high-performance supercapacitors. Here, a new class of hierarchical core-shell nanowire arrays (NWAs) with a shell of NiWO 4 nanoparticles and a core of MnCo 2 O 4 nanowires is reported, which can significantly improve the electrochemical energy storage properties of supercapacitors. The unique core-shell structure endows the MnCo 2 O 4 @NiWO 4 NWAs electrode with a high areal specific capacitance of 5.09 F cm −2 at a current density of 1 mA cm −2 and a superior cyclic retention of 96% after 5000 charge-discharge cycles, which are more preferable than those of MnCo 2 O 4 NWAs electrode. More importantly, an aqueous electrochemical energy storage device (core-shell MnCo 2 O 4 @NiWO 4 NWAs as the positive electrode and active carbon as the negative electrode, MnCo 2 O 4 @NiWO 4 //AC ASC) was assembled and shows a high energy density of 0.23 mWh cm −2 at a power density of 2.66 mW cm −2 , and 0.09 mWh cm −2 at 16.00 mW cm −2 , indicating hopeful potential for practical applications. This work highlights the significance of NiWO 4 as a shell for hierarchical core-shell nanostructures, which can further improve the electron transport characteristic of the electrode material, thereby achieving performance breakthroughs in energy storage devices.
研究领域:
材料科学
·
能源存储与转换
·
纳米技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Zichen Zheng,Kewei Liu,Yiwen Zhou,Kaichun Xu,Liangchao Guo,Marc Debliquy,Carla Bittencourt,Chao Zhang
The simultaneous optimization of sensitivity and humidity tolerance in metal oxide semiconductor (MOS)-based gas sensors remains a critical challenge for practical volatile compound (VOC) detection. This work demonstrates a defect engineering strategy to modulate the electronic and surface properties of NiWO 4 microstructures through controlled hydrogen reduction. Systematic annealing protocols induced a high density of oxygen vacancy (O V ) via selective oxygen removal, as confirmed by structural and spectroscopic characterization. The engineered oxygen vacancies exhibited dual functionality: (1) enhanced bulk electron transport through improved conductivity and (2) boosted surface reactivity via optimized adsorption sites. The optimized NiWO 4 sensor achieved exceptional performance for 1-octen-3-ol detection at 40 ppm, including a high response value (R a /R g = 20.6), fast response time (22 s), and remarkable relative humidity resilience (19.7 % response drift across 20–80 % RH). The mechanism underlying enhanced sensing performance is elucidated through an oxygen adsorption model and molecular dynamics (MD) simulation. This study establishes hydrogen reduction as an effective approach for developing durable NiWO 4 sensors with combined high sensitivity and environmental stability, advancing their applicability in real-world atmospheric monitoring systems.
研究领域:
材料科学
·
化学传感器
·
纳米技术
·
表面化学
·
环境监测
✓ 已验证
产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2025
·
IF 8.3
Jinrong Fan,Dongjian Kang,Xuyang Meng,Xiaoguang Wang,Zizai Ma,Jianping Du
Nickel tungstate-based materials emerge as effective catalysts to accelerate the kinetics of oxygen evolution reaction (OER), whereas their limited electrochemical activity and stability at industrial-level current densities necessitate structural and electronic optimization. In this paper, we explore the preparation of the self-supporting Fe 2 O 3 /NiWO 4 heterojunction nanosheets by a synergistic hydrothermal and vapor-phase cation exchange strategy. The optimized catalyst exhibits exceptional OER performance, requiring ultralow overpotentials of 251 and 310 mV to deliver 100 and 1000 mA cm −2 in 1 M KOH, respectively, along with remarkable durability exceeding 120 h of continuous operation. Density functional theory demonstrates that heterointerface drives directional electron transfer from Ni to Fe sites, redistributing interfacial charge density and elevating the Ni 3d orbital energy level closer to the Fermi level. This tailored electronic configuration hastens OER reaction rate by lowering activation barriers, and shifts the rate-determining step. Furthermore, the anion exchange membrane water electrolyzer employing Fe 2 O 3 /NiWO 4 anode demonstrates exceptional operational efficiency, requiring only 1.67 V to deliver industrial-scale current density (1000 mA cm −2 ) and maintaining stable operation for 60 h. This work serves critical insights for development of high-performance catalysts under practical operating conditions.
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产品关联
DOI
高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
·
2020
·
IF 16.683
Senchuan Huang,Yuying Meng,Yangfei Cao,Fen Yao,Zhujie He,Xuxu Wang,Hui Pan,Mingmei Wu
Heazlewoodite nickel sulfide (Ni 3 S 2 ) has become attractive for electrocatalytic hydrogen evolution reaction (HER). However, strong sulfur–hydrogen bonds (S–H ads ) formed on the surface of Ni 3 S 2 greatly hinder the H ads desorption and reduce HER activity. Herein, amorphous NiWO 4 nanoparticles-decorated Ni 3 S 2 electrocatalysts (NiWO 4 /Ni 3 S 2 ) have been constructed via a two-step hydrothermal method. The heterostructures exhibit much better HER performance than original Ni 3 S 2 by delivering current densities of −10 and −100 mA cm −2 at low overpotentials of 136 and 274 mV, while those for Ni 3 S 2 are 234 and 424 mV, respectively. Moreover, they display ultra-long stability of 75 h. Theoretical calculation proves the improved activity of NiWO 4 /Ni 3 S 2 heterostructures is attributed to highly active interfaces between amorphous NiWO 4 nanoparticles and Ni 3 S 2 electrocatalysts. The strong electronic interaction between NiWO 4 and Ni 3 S 2 decreases the local electron density of Ni and S atoms, facilitates water adsorption on Ni-sites and optimizes hydrogen atom adsorption/desorption on adjacent S-sites with weakened S–H ads .
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
Electronic Materials Letters
·
2024
·Vol. 20
·期 4
·459-473
·
IF 2.1
Tang Jing,Xu Hui,Chen Yong,Zhu Yuanqiang
Currently, transition metal tungstates are emerging as electroactive materials for supercapacitors due to their excellent electrical conductivity and electrochemical properties. Small amounts of transition metal ions doping can affect the physical and electrical properties of transition metal tungstates. In this study, Co ion-doped NiWO 4 amorphous composites (CNWO) were synthesized using a simple and effective hydrothermal method and utilized as the cathode material for supercapacitors. The structure and electrochemical properties of NiWO 4 and CNWO composites were investigated using various testing techniques. Specifically, when the cobalt ion doping amount is 10%, the corresponding CNWO-10 electrode material exhibits a specific capacitance of 804 F g −1 at 1 A g −1 , and at a current density of 10 A g −1 , the capacitance retention rate reaches 66.7%, demonstrating good rate performance. Additionally, an asymmetric supercapacitor device was constructed using CNWO-10 and activated carbon (AC) as positive and negative materials, respectively. Which could cycle reversibly under a potential window of 2.1 V. The device demonstrates a maximum specific capacitance of 76.5 F g −1 at 0.5 A g −1 , and a high energy density of 47 Wh kg −1 at a power density of 527 W kg −1 . Furthermore, 96% capacitance cycling stability is maintained after 5500 cycles at a trapezoidal current density. Moreover, the electrical conductivities of NiWO 4 and CNWO-10 samples are 9.01 × 10 –8 S m −1 and 8.93 × 10 –6 S m −1 , attributed to the Co ion-doping that can reduce the gap width of the forbidden band to enhance conductivity. These results suggest that CNWO composites can serve as promising high-capacity electrode materials for high-performance supercapacitors in alkaline electrolytes. Graphical Abstract
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
Surfaces and Interfaces
·
2025
·
IF 6.3
Weijie Yuan,Kanglong Zhang,Minghui Zhu,Jiamin Huang,Xue-Yang Ji,Dafeng Zhang,Junchang Liu,Xipeng Pu
The misuse of tetracycline (TC) poses a significant threat to the natural environment, necessitating the development of efficient methods for its degradation. Heterojunction photocatalysts have emerged as a promising approach for the degradation of such pollutants. This work aims to construct a novel NiWO 4 /Mn 0.3 Cd 0.7 S (NWO/MCS) S-scheme heterojunction using solvothermal coupled with mechanical mixing methods for efficient photocatalytic degradation of TC. The optimized NWO/MCS composite exhibited an 82% removal rate within 40 minutes under visible light irradiation, which represents an 18.4-fold and 1.13-fold improvement compared with pristine NWO and MCS, respectively. Various analytical methods and DFT calculations were utilized to characterize the structure and photophysical properties as well as prove the electron flow of the heterojunction, respectively. This work provides evidence of efficient charge carrier transfer between NWO and MCS within the S-scheme heterojunction, which contributes to the enhanced photocatalytic activity. The rational structural configuration of the S-scheme heterojunction has been shown to improve both the reduction and oxidation capabilities, offering a potential pathway for developing photocatalysts with high antibiotic removal efficiency.
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产品关联
DOI
高影响因子
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