SENSORS AND ACTUATORS B-CHEMICAL
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2014
·
IF 3.84
Xiaogan Li
Pure mesoporous TiO 2 microspheres based chemoresistive gas sensors showed response to several organic volatile compounds (VOCs) such as formaldehyde, methanol, ethanol, ammonia and acetone under the UV illumination in the humid air at room temperature . With the loading of NiO at the porous surface of TiO 2 microspheres, the sensor indicated a different sensing property. The sensor using 10 wt% NiO-wrapped mesoporous TiO 2 composite microspheres showed a good sensitivity to different concentrations of ammonia from 10 ppm to 100 ppm whereas almost no response to other VOCs indicating an excellent selectivity to detect ammonia in the humid air with UV illumination at room temperature.
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ACS Nano
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2017
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IF 13.942
Jie Yin,Yuxuan Li,Fan Lv,Qiaohui Fan,Yong-Qing Zhao,Qiaolan Zhang,Wei Wang,Fangyi Cheng,Pinxian Xi,Shaojun Guo
The development of highly efficient bifunctional catalysts for oxygen evolution reaction (OER) and oxygen reduction reaction (ORR) is crucial for improving the efficiency of the Zn–air battery. Herein, we report porous NiO/CoN interface nanowire arrays (PINWs) with both oxygen vacancies and a strongly interconnected nanointerface between NiO and CoN domains for promoting the electrocatalytic performance and stability for OER and ORR. Extended X-ray absorption fine structure spectroscopy, electron spin resonance, and high-resolution transmission electron microscopy investigations demonstrate that the decrease of the coordination number for cobalt, the enhanced oxygen vacancies on the NiO/CoN nanointerface, and strongly coupled nanointerface between NiO and CoN domains are responsible for the good bifunctional electrocatalytic performance of NiO/CoN PINWs. The primary Zn–air batteries, using NiO/CoN PINWs as an air–cathode, display an open-circuit potential of 1.46 V, a high power density of 79.6 mW cm–2, and an energy density of 945 Wh kg–1. The three-series solid batteries fabricated by NiO/CoN PINWs can support a timer to work for more than 12 h. This work demonstrates the importance of interface coupling and oxygen vacancies in the development of high-performance Zn–air batteries.
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PubMed
高影响因子
Molecular Catalysis
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2024
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IF 3.9
Xiaoying Zhou,Shiyu Fang,Zihao Hu,Zuliang Wu,Jing Li,Wei Wang,Jiali Zhu,Shuiliang Yao,Erhao Gao
This study introduces a novel catalyst system comprising Pd nanoparticles loaded onto Mn-doped NiO for the efficient oxidation of methane (CH 4 ) at low temperatures. The loading of Pd nanoparticles onto the Mn-doped support has yielded a catalyst with exceptional activity and stability, as evidenced by the lowest T 50 temperature of 276 °C and a CH 4 conversion reaching 97% at 325 °C. The catalyst demonstrates optimized reaction kinetics with the lowest activation energy of 69.2 kJ mol –1 . The catalyst's superior performance is attributed to the synergistic effects of the Pd/Mn-NiO composite, which include a higher Pd 2+ /Pd 4+ ratio, increased adsorptive oxygen concentration (O ads /O total ), and a reduced Ni 3+ /Ni 2+ ratio. These characteristics collectively enhance the catalytic activity for CH 4 oxidation. The Mars-van Krevelen mechanism underpins the oxidation process, with Pd 2+ identified as the principal active site for CH 4 adsorption and dissociation. Diffuse reflectance infrared Fourier transform spectroscopy coupled with mass spectrometry elucidates the pathway of surface reactive oxygen species in the formation of key intermediates, such as formates, and underscores the accelerated decomposition of carbonate facilitated by the Pd modification on the Mn-NiO surface. The findings signify a significant advancement in the development of catalysts for environmental and energy-related applications, particularly in the mitigation of CH 4 emissions.
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CERAMICS INTERNATIONAL
·
2024
·
IF 5.1
Yingyue Wang,Jinyang Huang,Wansheng Tang,Mengying Long,Zongwei Zhang,Hongli Liu,Dongmin An
In this work, an uncomplicated solvothermal method was used to synthesize NiO-SnO 2 gas sensing materials derived from bimetallic MOFs. The influence of MOF derived NiO-SnO 2 with different amount of Ni on the gas sensing performance of triethylamine (TEA) was systematically evaluated. The results showed that the MOF derived 0.5 mol% NiO-SnO 2 based gas sensor exhibited the best gas sensing performance. The response to TEA gas of the sensor reached 124.5 to 50 ppm at 170 °C, which was 1.5 times that of SnO 2 sensor (83). Compared with SnO 2 sensor at 190 °C, its operating temperature was reduced by 20 °C. Moreover, the MOF derived 0.5 mol% NiO-SnO 2 sensor also performed outstanding selectivity towards TEA, with a response that is 3.1–49.8 times higher than other target gases. The MOF derived NiO-SnO 2 nanomaterials were also conducted X-ray photoelectron spectroscopy and UV–visible absorption spectra analysis. The results demonstrated that an increase in specific surface area, abundant oxygen vacancies, a decrease in forbidden bandwidth, and the formation of p-n heterojunctions were significant factors in improving the gas sensing performance of MOF derived NiO-SnO 2 nanomaterials.
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IONICS
·
2024
·
IF 2.4
Yan Lichen,Chen Wei,Song Zehui,Xiao Li
A novel NiO/MnO 2 pompon-like hybrid structure was synthesized through a facile one-step hydrothermal in situ growth approach in this paper. NiO nanosheets grow on MnO 2 pompon-like microsphere to form typical hybrid structures which significantly increase the abundant active sites of electrode materials. The resulting NiO/MnO 2 electrode material exhibits an impressive specific capacity of 2706.1 F/g at a current density of 1 A/g. Remarkably, NiO/MnO 2 pompon-like hybrid structure shows excellent cycling performance and its capacity retention is maintained at 84.8% and the charge–discharge efficiency at 96% after 15,000 cycles. Even after undergoing 40,000 cycles, the electrode material maintains an outstanding charge–discharge efficiency of 95.2% with capacity retention of 69%, which revealing promising application as long-term electrode materials for supercapacitors.
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2024
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IF 9.4
Hong-Li Yue,Hong-Yan Zeng,Jin-Feng Peng,Wei Yan,Kai Zhang,Chao-Wei Luo,Zi-Feng Tian
Constructing amorphous/crystalline heterophase structure with high porosity is a promising strategy to effectively tailor the physicochemical properties of electrode materials and further improve the electrochemical performance of supercapacitors. Here, the porous C-doped NiO (C-NiO) with amorphous/crystalline heterophase grown on NF was prepared using NF as Ni source via a self-sacrificial template method. Calcining the self-sacrificial NiC 2 O 4 template at a suitable temperature (400 °C) was beneficial to the formation of porous heterophase structure with abundant cavities and cracks, resulting in high electrical conductivity and rich ion/electron-transport channels. The density functional theory (DFT) calculations further verified that in-situ C-doping could modulate the electronic structure and enhance the OH − adsorption capability. The unique porous amorphous/crystalline heterophase structure greatly accelerated electrons/ions transfer and Faradaic reaction kinetic, which effectively improved the charge storage. The C-NiO calcined at 400 °C (C-NiO (4 0 0) ) displayed a markedly enhanced specific charge, outstanding rate property and excellent cycling stability. Furthermore, the hybrid supercapacitor assembled by C-NiO (4 0 0) and active carbon achieved a high energy density of 49.0 Wh kg −1 at 800 W kg −1 and excellent cycle stability (90.9 % retention at 5 A/g after 10 000 cycles). This work provided a new strategy for designing amorphous/crystalline heterophase electrode materials in high-performance energy storage.
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高影响因子
MICROCHEMICAL JOURNAL
·
2025
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IF 5.1
Zhaopeng Li,Pei Li,Jinfu Zhang,Helei Yang,Zhiguo Zhu,Hua Zhou,Xia Sun,Zhenhe Wang
This study reports on the development of a NiO quantum dot-modified ZnO gas sensor, which is designed for detecting ethyl formate, a crucial indicator of fish meal spoilage. The results indicated that NiO quantum dots were uniformly dispersed on the surface of ZnO, leading to the formation of a P N heterojunction that enhanced the gas sensing properties. Among the sensors tested, the S2 sensor (with a NiO doping of 0.1 mmol) exhibited the highest response value of 15.75 when exposed to 100 ppm of ethyl formate at 260 °C, additionally presented out excellent selectivity, linear response behavior, and long-term stability. The superior performance of the S2 sensor can be attributed to its unique jackfruit-like structure and the formation of P N junctions. These features increase the number of active sites and modulate the electronic properties of the material. The S2 sensor has been implemented for the assessment of fish meal freshness. This study emphasizes the great potential of this sensor for the real-time monitoring of fish meal freshness, offering significant applications in the field of food and feed safety.
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INORGANIC CHEMISTRY COMMUNICATIONS
·
2024
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IF 4.4
Hao Sun,Zhigang Xie,Jun Yang,Taiping Xie,Zixuan Zhang,Bingzhao Cui,Yanling Zhao,Meiying Huang
Bismuth chloride oxide is a potential photocatalyst with a unique structure and visible light responsive properties. This paper explores the effects of different ratios of NiO on the photocatalytic performance of NiO/BiOCl heterojunction photocatalysts, which are prepared by impregnation and annealing. The experimental results demonstrate that the construction of NiO/BiOCl heterojunction enhances the visible light response and significantly decreases the compounding efficiency of the photogenerated carriers. The degradation of tetracycline by 6% NiO/BiOCl was almost complete within approximately 30 min, which is about 30% faster than that of unmodified BiOCl. The cycling performance is excellent and the preparation process is simple, making it highly applicable.
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OPTICAL MATERIALS
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2025
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IF 4.2
Liangmiao Zhang,Changzheng Pan,Hao Zeng,Kailin Han,Yanfeng Gao
Nickel oxide (NiO), an electrochromic (EC) material, has been extensively used in various fields such as smart energy-saving windows, intelligent displays, and anti-counterfeiting technologies. However, crystalline NiO exhibits some drawbacks that hinder its practical applications. In this research, we successfully synthesized amorphous and porous C/N-doped NiO films through a two-step process. The process involved the formation of a complex between acetate tetrahydrate and monoethanolamine, followed by spray coating and calcination. The resultant C/N-doped NiO films demonstrated exceptional EC properties, including a high optical modulation of 57.7 % at 500 nm, rapid coloration and bleaching times of 7 and 11 s, respectively, and an ultra-high coloring efficiency of 108.2 cm 2 /C. Furthermore, the films exhibited remarkable cycling stability, maintaining a transmittance of 63.1 % after 500 cycles. Notably, when applied to smart windows, these films reduced the temperature of room center by 14.3 °C compared to traditional double-glazed windows. This study introduces a promising material for EC smart windows and display applications, advancing the field beyond previously reported methods.
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Nature Communications
·
2024
·Vol. 15
·期 1
·1-9
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IF 14.7
Hu Kejun,Li Qing,Song Dongsheng,Jia Yingze,Liang Zhiyao,Wang Shuai,Du Haifeng,Wen Hai-Hu,Ge Binghui
The recent discovery of superconductivity in infinite-layer nickelate films has sparked significant interest and expanded the realm of superconductors, in which the infinite-layer structure and proper chemical doping are both of the essence. Nonetheless, the reasons for the absence of superconductivity in bulk infinite-layer nickelates remain puzzling. Herein, we investigate atomic defects and electronic structures in bulk infinite-layer Nd 0.8 Sr 0.2 NiO 2 using scanning transmission electron microscopy. Our observations reveal the presence of three-dimensional (3D) block-like structural domains resulting from intersecting defect structures, disrupting the continuity within crystal grains, which could be a crucial factor in giving rise to the insulating character and inhibiting the emergence of superconductivity. Moreover, the infinite-layer structure, without complete topotactic reduction, retains interstitial oxygen atoms on the Nd atomic plane in bulk nickelates, possibly further aggravating the local distortions of NiO 2 planes and hindering the superconductivity. These findings shed light on the existence of structural and atomic defects in bulk nickelates and provide valuable insights into the influence of proper topotactic reduction and structural orders on superconductivity.
研究领域:
材料科学
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凝聚态物理
·
超导
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Plasma Processes and Polymers
·
2024
·Vol. 21
·期 7
·2400001
·
IF 2.9
Shouxian Tang,Shiji Qin,Zhengduo Wang,Lijun Sang,Jiushan Cheng,Zhongwei Liu
A solution combustion synthesis (SCS) process to prepare nickel catalyst over bentonite (NiO/Ben) is reported. Compared to the traditional impregnation method, NiO/ben produced by SCS has smaller nickel particle size and higher dispersion. With a metal loading of 20 wt%, the afforded NiO/Ben demonstrates excellent catalytic activity for CO 2 methanation in a dielectric barrier discharge reactor. In certain discharge conditions (H 2 :CO 2 ratio of 5 in feed gas, discharge input power of 45 W, and gas hourly space velocity of 11 320 h − 1 ), CO 2 conversion and CH 4 selectivity are as high as 55.8% and 84.6%, respectively. Under the conditions of plasma configuration, the strong interaction between the nickel species and the support plays an important role in the CO 2 methanation process.
研究领域:
化学工程
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环境科学
·
催化科学
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高影响因子
Journal of Energy Storage
·
2025
·
IF 9.8
Chenglin Wei,Mengdi Sun,Baoguo Zhang,Zhangyong Yan,Zihao Dang,Yongkang Xu,Lin Wu,Ya Hu
Benefiting from the low cost and natural abundance of sulfur, as well as its excellent theoretical performance metrics - including a capacity of 1675 mAh g −1 and an energy density of 2600 Wh kg −1 - lithium-sulfur (Li-S) batteries have attracted considerable attention for next-generation energy storage. However, their practical deployment is severely hindered by the intrinsic shuttle effect of lithium polysulfides (LiPSs), which leads to the loss of active materials and poor cycling stability. In this work, we report a facile hydrothermal-calcination strategy to synthesize porous nanosheet-structured Fe-doped nickel oxide (Fe-NiO) as a functional separator modifier for Li-S batteries. The polar nature of NiO enables strong chemical interactions with LiPSs, effectively anchoring polysulfides on the cathode side and suppressing the shuttle effect. Furthermore, Fe doping significantly increases the density of surface active sites, thereby enhancing the adsorption and catalytic conversion of LiPSs into insoluble Li 2 S 2 /Li 2 S species, which promotes redox kinetics and mitigates capacity fading. When applied to Li-S cells, the Fe-NiO-modified separator markedly improves the electrochemical performance, delivering a high reversible capacity of 1150 mAh g −1 at 0.2C, an excellent rate capability of 505 mAh g −1 at 5C, and outstanding long-term stability with a minimal capacity decay of 0.091 % per cycle over 500 cycles at 1C. This study presents a simple and scalable strategy for separator engineering, providing a promising pathway toward high-performance Li-S batteries.
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