APPLIED CATALYSIS B-ENVIRONMENTAL
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2019
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IF 14.229
Lindong Liu,Qian Liu,Ying Wang,Jin Huang,Wenju Wang,Lian Duan,Xiao Yang,Xiaoyong Yu,Xu Han,Nian Liu
Engineering the electronic properties of catalysts to facilitate electron transfer and activation of dynamically stable peroxydisulfate (PDS) offers a promising strategy for efficient remediation of recalcitrant organic pollutants through heterogeneous Fenton-like processes, but also presents challenges due to a lack of facile methods. Herein, we highlight a simple defect engineering strategy that greatly increases the efficiency of PDS adsorption and activation by introducing oxygen vacancies ( V O ) into NiO to produce an electron-rich surface. Experimental studies and density functional theory (DFT) calculations confirmed that V O confined in NiO could successfully cause synergetic effects of lower adsorption energy and more exposed active sites, thus facilitating the bonding with PDS molecules and promoting the reactivity of PDS-NiO complex, giving rise to dramatic enhancement of catalytic performance with removal rate as high as 3.978 mmol(phenol) min −1 g(NiO) −1 . Mechanistic studies further reveal that the surface-activated PDS-NiO complex mediate oxidative polymerization of phenol (a model pollutant) involved in the generation of phenoxyl radicals and subsequent coupling reactions, providing the potential to convert recalcitrant organic pollutants into value-added products. This work may pave the way toward practical fabrication of highly efficient “defect-type” Fenton-like catalysts, and the present method also provides new opportunities to achieve sustainable wastewater treatment through reuse of organic pollutants.
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高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
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2020
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IF 4.65
Xianke Zhang,Li Li,Yuqiang Zeng,Jujun Yuan,Yi Yu,Xiurong Zhu,Zuzhou Xiong,Huajun Yu,Yingmao Xie
In this study, we report a facile in situ synthesis of hierarchical NiO/NiFe 2 O 4 sub-microcubes by annealing Ni 3 [Fe(CN) 6 ] 2 sub-microcubes fabricated via a one-step solution-precipitation method. The temperature-dependent magnetization curves show that there exists a collective freezing of the moments of interface spin clusters at T B ≈ 296 K , which further indicates the appearance a coupling interaction between the ferrimagnetic NiFe 2 O 4 and antiferromagnetic NiO nanoparticles . Furthermore, hysteresis loops measurements reveal the existence of an exchange bias effect in the NiO/NiFe 2 O 4 composite system . Interestingly, no training effect of exchange bias is observed, which indicates that the magnetic pinning interaction between NiFe 2 O 4 and NiO is stable and robust. Exchange bias field shows an exponential dependence on temperature and vanishes at about 150 K, which reveals the strong coupling interaction does not improve effectively the thermal stability of exchange bias effect in the current system.
研究领域:
材料科学
·
物理学
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ACS Applied Electronic Materials
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2026
·
IF 4.7
Zhe Li,Yawen Wei,Yingcun Liu,Zhe Sun,Li Niu,Jian Fang
Textile-based temperature sensors often suffer from signal distortion due to strain interference in practical applications, severely limiting their reliability in dynamic environments. To address this challenge, this study developed a strain-insensitive resistive temperature-sensing yarn with a helical structure, named CNAS. The yarn utilizes aramid fiber as the substrate. After modification with polydopamine (PDA), single-walled carbon nanotubes (SWCNTs) were loaded onto the substrate through five cycles of dipping and drying. Subsequently, a uniform nickel oxide (NiO) sensitive layer was constructed on its surface via electrodeposition followed by thermal decomposition. The sensitive yarn (CNA) was then helically wrapped onto a prestretched Spandex core yarn to form the CNAS composite yarn. Experimental results demonstrate that CNAS exhibits a resistance variation below 4% within a strain range of 0–93% and maintains stable performance after 500 stretching cycles. It displays a significant negative temperature coefficient (NTC) behavior within a temperature range of −20 to 70 °C, with its sensitivity markedly superior to that of pure carbon nanotube (CNT) or graphene (GR) yarns. Human wear trials further confirmed that the yarn can effectively distinguish temperature changes from strain interference induced by joint movements. An alarm system built using CNAS enables reliable visual alerts for ambient temperature changes. This research provides an innovative and practical solution for anti-interference wearable temperature sensors.
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CHINESE JOURNAL OF CHEMICAL ENGINEERING
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2020
·
IF 2.627
Nanhang Dong,Ruiqiang Huo,Ming Liu,Lisheng Deng,Zhengbing Deng,Guozhang Chang,Zhen Huang,Hongyu Huang
Chemical looping gasification (CLG) provides a novel approach to dispose the sewage sludge. In order to improve the reactivity of the calcined copper slag , NiO modification is considered as one of the good solutions. The copper slag calcined at 1100 °C doped with 20 wt% NiO (Ni20-CS) was used as an oxygen carrier (OC) in sludge CLG in the work. The modification of NiO can evidently enhance the reactivity of copper slag to promote the sludge conversion, especially for sludge char conversion. The carbon conversion and valid gas yield ( V g ) increase from 67.02% and 0.23 m 3 ·kg −1 using the original OC to 78.34% and 0.29 m 3 ·kg −1 using the Ni20-CS OC, respectively. The increase of equivalent coefficient ( Ω ) facilitates the sludge conversion and a suitable Ω value is determined at 0.47 to obtain the highest valid gas yield (0.29 m 3 ·kg −1 ). A suitable steam content is assigned at 27.22% to obtain the maximum carbon conversion of 87.09%, where an acceptable LHV of 12.63 MJ·m −3 and V g of 0.39 m 3 ·kg −1 are obtained. Although the reactivity of Ni20-CS OC gradually decreases with the increase in cycle numbers because of the generation of NiFe 2 O 4- δ species, the deposition of sludge ash containing many metallic elements is beneficial to the sludge conversion. As a result, the carbon conversion shows a slight uptrend with the increase of cycle numbers in sludge CLG. It indicates that the Ni20-CS sample is a good OC for sludge CLG.
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JOURNAL OF POWER SOURCES
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2019
·
IF 7.467
Hui-Xian Yang,Dong-Lin Zhao,Wen-Jie Meng,Ya-Qian Wu,Yu Yang,Hao Pu,Rui-Ze Gao
Electrochemical energy storage (EES) devices that combine high-performance are essential to resolve the extreme shortage of non-renewable energy sources and environmental issues. Nickel oxide (NiO) is considered to be a promising EES cathode material because of its ultra-high theoretical specific capacitance, whereas the practical applications are greatly limited with poor rate and cycle performance. Herein, we report the yolk-shelled NiO/Ni composites (YS NiO/Ni) that exhibit good charge storage capability in the aqueous electrolyte with high specific capacitance (2207.3 F g −1 at 1 A g −1 ), exceptional rate capability, and ultra-high cycling stability (95.8% retention after 10,000 cycles). The superior property can be ascribed to the special yolk-shelled structure that exposes more redox reaction active sites, and the associate Ni nanoparticles with flower-like NiO which can improve electron transfer as current collectors.
研究领域:
材料科学
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电化学
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能源存储
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纳米材料
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功能材料
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电化学能量存储
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高影响因子
LANGMUIR
·
2024
·
IF 3.7
Pai Peng,Jie Ren,Shuxiang Wang,Jing Huang,Li Zou,Pingping Yang,Xiangui Pang,Ming Zhang,Youyi Su,Wanqi Luo,Wenyan Tao,Jiale Xie
The severe photocorrosion of cadmium sulfide (CdS) restricts its practical application for solar hydrogen production. Although remarkable progress has been achieved with an overlayer strategy for isolating the CdS surface, the lifetime of CdS-based photoanodes is still far from the actual requirements. Herein, a hybrid overlayer of defective Ni-MOF and NiO nanoparticles has been developed through the chemical bath deposition method with postannealing. This hybrid overlayer of Ni-MOF-d is coated on the surface of the TiO2/CdS type-II heterojunction. The composite photoanode exhibits a photocurrent density of 4.41 mA cm–2 at 1.23 VRHE, which is 3.47- and 1.32-fold that of CdS and TiO2/CdS, respectively. The Ni-MOF-d overlayer gives rise to a negative shift of the onset potential by 59.51 mV. After a long-term stability test of 11 h, a photocurrent retention of 70% is observed, which is among the most robust CdS-based photoanodes. The kinetics studies reveal that the performance improvements can be attributed to the multiple functions of the Ni-MOF-d hybrid overlayer, including isolating the CdS surface from the electrolyte, cocatalyzing the electrode oxidation processes, passivating the surface defect states of CdS, and facilitating the charge injection from the photoanode to the electrolyte.
研究领域:
材料科学
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光催化
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可再生能源
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纳米材料
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电化学
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高影响因子
CHEMICAL ENGINEERING JOURNAL
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2019
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IF 8.355
Wenming Zhang,Pin Cao,Zihao Zhang,Yajun Zhao,Yu Zhang,Ling Li,Kun Yang,Xiaowei Li,Lin Gu
Rational design of nanostructured metal oxides with carbon substrates is urgently needed to improve the electrochemical properties of sodium-ion batteries (SIBs). In this paper, the preparation of one-dimensional (1D) metal-organic frameworks grown on polymer(Co/Ni) fiber films via a feasible electrospinning method and in situ growth strategy is reported. After successive carbonization and oxidation heat-treatments, hierarchical heteroatom-doped carbon nanofibers decorated with several nanocomposites (denoted as NiCo 2 O 4 /NiO/carbon nanofibers) were obtained. When their electrochemical properties were evaluated by testing Na half-cells, the resultant sample displayed a high sodium-storage capacity of 210 mAh g −1 after 200 cycles at a current density of 100 mA g −1 and an outstanding rate capability. The enhancement of the sodium-storage performance of NiCo 2 O 4 /NiO/carbon nanofibers was ascribed to the novel structure and the synergistic effect between Co/Ni-Oxide and carbon component. The 1D carbonized nanofibers are well intertwined to form a three-dimensional conductive matrix with heterogeneous particles embedded, which can effectively reduce the ionic diffusion distance and ensure high electronic mobility along their 1D geometry, leading to rapid diffusion kinetics. Furthermore, well-dispersed heterogeneous particles endow the composite high surface to exposure to the electrolyte, which can contribute to a high utilization rate.
研究领域:
材料科学
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储能技术
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电化学
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纳米材料
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金属有机框架（MOFs）
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高影响因子
CHEMICAL ENGINEERING JOURNAL
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2026
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IF 12.5
Zhiyuan Jiang,Fan Zhao,Chong Li,Ruihao Wang,Xiaoqi Feng,Mengke Li,Zongqi Wang,Siyi Liu,Kaixuan Yao,Lingmin Yu,Hairong Wang
In-situ growth of NiO nanowalls on MEMS micro-hotplates secures Ohmic contact. • Pt doped into the NiO lattice intrinsically anchors oxygen vacancies. • The device achieves exceptional 60-day stability and 98% RH moisture resistance. • Rapid and ultraselective acetone sensing enables non-invasive diabetes screening. Non-invasive breath acetone analysis offers a promising approach for continuous diabetes monitoring. However, poor long-term stability and material-electrode interfacial drift in p-type metal oxide sensors remain key bottlenecks for their clinical translation. To address these challenges, a Micro-Electro-Mechanical-System (MEMS) acetone sensor was developed via the in-situ growth of Pt-doped NiO nanowalls on a micro-heater chip. Unlike conventional surface modification and physical coating methods, the intrinsic doping of Pt within the NiO lattice and its integration with the substrate address signal drift through a synergistic dual mechanism. Specifically, the in-situ growth minimizes contact resistance drift at the material-electrode interface. Simultaneously, intrinsic Pt lattice doping anchors the active sites, suppressing catalyst thermal agglomeration and preserving structural stability at the gas-solid interface. The optimized sensor exhibits a response of 10.3 to 100 ppm acetone at 200 °C (a 5.7-fold enhancement over pure NiO) and a response time of 37 s. Furthermore, the device demonstrates continuous stability over 60 days and steady-state reliability at the 1.8 ppm clinical diagnostic threshold. It also shows stable moisture resistance (up to 98% relative humidity), maintaining typical p-type characteristics without response reversal phenomena. Supported by competitive co-adsorption density functional theory (DFT) calculations, this moisture tolerance is attributed to a favorable adsorption energy that prioritizes acetone chemisorption over water molecules. Comprehensive characterizations and DFT models indicate that Pt doping triggers localized lattice distortions and charge compensation, increasing the surface oxygen vacancy concentration (35.2%). This theoretically broadens the hole accumulation layer (HAL) and facilitates single-molecule acetone adsorption (−1.12 eV), stabilizing the p-type conduction mechanism. This work provides a stable, drift-resistant acetone sensor capable of sub-ppm trace detection for non-invasive diabetes screening. Download: Download high-res image (204KB) Download: Download full-size image
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高影响因子
CERAMICS INTERNATIONAL
·
2026
·
IF 6
Chongchen Pang,Mengyuan Ren,Xu Li,Qingji Wang
Carbon monoxide is a colorless and odorless, highly toxic gas, posing a significant risk to both human health and industrial safety. Zinc oxide has garnered significant interest for its outstanding chemical stability and cost-effectiveness in the development of CO sensors. However, sensors based on a single ZnO has the shortcomings of low sensitivity and high detection limit, rendering them challenging to meet the precise detection requirements for CO. To address this issue, ZnO nanoflower arrays were prepared by chemical bath deposition (CBD), followed by modification of varying ratios of Co 3 O 4 and NiO onto the ZnO nanoflower arrays. The response value of the sensor based on Co 3 O 4 -NiO/ZnO-2 to 100 ppm CO was 104% at 310 °C. Remarkably, the sensor achieved an exceptionally low detection limit of 1 ppb. Further, the crystal structure and morphology characteristics of Co 3 O 4 -NiO/ZnO were systematically analyzed by XRD, SEM, TEM, XPS, Raman, EDS, EPR, and BET. The results show that the improvement in gas-sensing performance is mainly ascribed to the ZnO nanoflower array and the heterojunctions formed among Co 3 O 4 , NiO and ZnO. In this study, Co 3 O 4 and NiO decorated ZnO nanoflower arrays were prepared by a two-step CBD, offering a novel approach for advancing high-performance CO sensors.
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高影响因子
JOURNAL OF THE INDIAN CHEMICAL SOCIETY
·
2026
·Vol. 103
·期 5
·102576
·
IF 3.4
Xingyu Liu,Huiyang Li,Guoli Zhao,Weiya Yang
Catalytic hydrolysis of ammonia borane presents a promising pathway for hydrogen production. Herein, pyroligneous acid, a byproduct of biomass pyrolysis, was employed for the green synthesis of a NiO–Co 3 O 4 –CuO microparticle catalyst, and the catalytic performance for hydrogen evolution via ammonia borane hydrolysis was evaluated. The synergistic effects among CuO, NiO and Co 3 O 4 were found to significantly enhance catalytic activity. The porous structure of the catalyst facilitated the catalytic reaction. The optimized green-synthesized NiO–Co 3 O 4 –CuO catalyst demonstrated exceptional hydrogen production efficiency of 1153 mL⋅g −1 ⋅min −1 , validating the advantages of plant-derived extracts as both reducing and stabilizing agents in catalyst preparation. These findings provide critical insights for designing high-performance oxide catalysts for ammonia borane hydrolysis. With its cost-effectiveness and superior catalytic performance, the NiO–Co 3 O 4 –CuO catalyst emerges as a prime candidate for practical hydrogen production applications. Furthermore, this research highlights the substantial potential of environment friendly synthesis approaches in developing advanced energy conversion materials.
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JOURNAL OF APPLIED ELECTROCHEMISTRY
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2026
·Vol. 56
·期 9
·181
·
IF 3.7
Zou Liming,Xu Guorong,Tang Anping,Song Haishen
A straightforward dip-coating method was proposed for the direct construction of three-dimensional NiO micro-nanorod arrays on nickel foam. The morphology and crystal structure were characterized by scanning electron microscopy and X-ray diffraction, respectively, confirming the beneficial growth and favorable crystallinity of the fabricated micro-nanorods. Electrochemical measurements revealed that the NiO micro-nanorod arrays electrode delivered a high specific capacitance of 1400 F g −1 at a current density of 1 A g −1 in 2 M NaOH electrolyte. Furthermore, an asymmetric supercapacitor was assembled using the fabricated NiO as the positive electrode and activated carbon as the negative electrode. At a current density of 0.5 A g −1 , the device achieved a energy density of 114.74 Wh kg −1 , while a maximum power density of 14 kW kg −1 was attained at an energy density of 73.84 Wh kg −1 . Remarkably, the device exhibited outstanding cycling stability, maintaining 100% capacitance retention and 99.1% Coulombic efficiency after 5000 charge–discharge cycles. This work presented a simple, safe, and efficient strategy for fabricating NiO micro-nanorod arrays structure, offering a promising route toward high-performance electrochemical energy storage devices. Graphical abstract
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高影响因子
CHEMICAL PAPERS
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2025
·
IF 2.5
Gu Peng
Dielectric composites with high dielectric constant, minimal dielectric loss and low conductivity can well serve for energy storage capacitors. High dielectric loss is not favorable due to large energy waste. Here, to improve dielectric constant of poly(vinylidene fluoride–hexafluoropropylene) by electric percolation, semiconducting NiO filler was added to form composites. However, high leakage current from interfaces can lead to high dielectric loss. Doping insulating α-Al 2 O 3 particles with stable structure, low chemical activity and high modulus into above binary composites can reduce dielectric loss. By changing NiO dose, dielectric constant was well tailored. Dose of α-Al 2 O 3 was left unchanged. Dielectric loss, conductivity and dielectric constant of composites were measured. By the same NiO loading, dielectric loss, conductivity and dielectric constant in ternary composites can be reduced, compared with binary composites. The optimal ternary composite should contain 35 wt% NiO and 4 wt% α-Al 2 O 3 . Optimized dielectric traits of this composite can be reflected by dielectric constant of ~ 64 and dielectric loss of ~ 0.27 under 100 Hz electric field.
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