CHEMICAL ENGINEERING JOURNAL
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2024
·
IF 13.3
Hui Xu,Haoran Zhong,Jinwu Hu,Xianjun Rong,Wenhui Zhang,Yinsheng Wang,Shengjuan Li,Guisheng Li,Ding Wang
Aiming to achieve high-sensitivity volatile organic compounds (VOCs), it is of great significance to continuously enhance the sensing performance of metal oxide based sensors. Herein, novel NiO nanoplates-decorated on SnO 2 nanofibers 1D core–shell structures derived from metal-organic frameworks (MOFs) are fabricated by the facial solvothermal method and heat treatment for VOCs gas sensors. The morphology and composition of 1D core shell SnO 2 @NiO are regulated by solvothermal time in the range of 0 ∼ 24 h. Based on the unique structure and composition of SnO 2 @NiO, SnO 2 @NiO with 4 h solvothermal time (denoted as SnO 2 @NiO-4) exhibits excellent selectivity, high response (R a /R g = 25.6) and low detection limit as well as good response linearity between response and concentration of xylene. Especially, the obtained SnO 2 @NiO-8 and SnO 2 @NiO-16 show the high sensitivity to acetone (R a /R g = 28.7) and triethylamine (R a /R g = 13.7), respectively. Structural characterizations such as SEM, TEM, and Mott-Schottky results demonstrate the core–shell structure with p-n heterojunction. In-depth investigations on reaction mechanism reveal XPS, photoluminescence (PL), and ESR testing reveal the intrinsic defects such of oxygen vacancy and Ni 3+ active sites. And in situ FTIR, online mass spectroscopy, as well as UV/UPS analysis further discover the evolution of intermediates and products during the surface catalysis reaction. These results demonstrate that the remarkable sensing performance of SnO 2 @NiO-8 can be attributed to several factors, including abundant oxygen vacancy, formation of p-n heterostructure and efficient Ni 3+ /Ni 2+ catalyzing, which beneficial for increased active sites and enhanced electron transport. This synthetic strategy provides an effective method for the facile engineering of high-performances metal oxide-based sensors towards practical health assessment.
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高影响因子
JOURNAL OF POWER SOURCES
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2024
·
IF 8.1
Zhidong Jin,Yue Mou,Jinbo Zhao,Fei Liu,Lin Liu,Dewen Zhao,Shiqiang Li,Fenglong Wang,Jiurong Liu,Chang Liu,Lili Wu
Clean, alternative energy sources, especially fuel cells, are gradually attracting global attentions while the produced toxic nitrogen dioxide (NO 2 ) is a greatly hazardous chemical impacting their energy efficiencies. Metal oxide semiconductors (MOS) hold significant promise as NO 2 sensors. However, intensive humidity interaction intensifies signal drifts and reliable response inhibitions under variable humidity conditions. In this study, we present a novel approach to address this issue by engineering in-situ F-doped NiO nanocomposites (NiOF x ) decorated on ZnO snowflakes achieved through decomposition modulation of ZnOHF precursors. The optimized NO 2 sensor demonstrates unparalleled humidity-independence across a wide operating temperature range with prime sensitivity, low detection limit and rapid response/recovery. Matrix algorithm is also implemented in highly precise NO 2 identification under complicated atmospheric and humid conditions. Mechanism studies based on temperature programmed desorption (TPD), quasi in-situ X-ray photoelectron spectroscopy ( Quasi in-situ XPS) reveal that F − dopants facilitate interfacial electron transferring and inhibit oxygen activity. In-situ diffuse reflectance infrared Fourier transform spectroscopy ( In-situ DRIFTS) demonstrates that hygroscopic NiO and electronegative F − synergistically obstruct hydroxyl adsorptions on sensing materials. The innovative approach offers a promising solution for enhancing moisture resistance of MOS sensors for real-time NO 2 concentration monitoring in fuel cells and provides valuable insights into anti-humidity mechanisms.
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CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Kuan Wang,Tong Sun,Hui Ma,Yi Wang,Zhen-Hong He,Huan Wang,Weitao Wang,Yang Yang,Lei Wang,Zhao-Tie Liu
The photo-driven CO 2 reduction holds significant potential in facilitating carbon fuel conversion. However, the inefficiency of charge conversion severely limits its spractical applications. Herein, the charge transfer routeway was tailored in NiO/BiOCl-7 heterostructures via a transform from type-II to S-scheme for enhancing CO 2 photoreduction to CO. Such S-scheme NiO/BiOCl-7 heterojunctions were prepared by pH-modulation to optimize the energy band structure of BiOCl and introduce abundant oxygen vacancies. Surprisingly, the S-scheme NiO/BiOCl-7 heterojunctions exhibited a significantly enhanced production of CO (78.11 μmol·g −1 ·h −1 ) with an impressive selectivity of 97.1 %, representing a remarkable 1.7- and 4.3-fold improvement in CO yield compared to the type-II NiO/BiOCl heterojunctions and pure BiOCl samples, respectively. The in-situ spectral experiments and DFT calculations reveal that the superior CO production can be attributed to a lower energy barrier for COOH* and a smoother potential energy surface of the S-scheme heterojunction with abundant oxygen vacancies. This meticulous strategy of energy band modulation sheds light on the deliberate customization of Bi-based heterostructures with favorable charge transfer for highly effecient photocatalysis.
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COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2025
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IF 5.4
Xuan Li,Yuyan Cao,Yihui Shen,Yulin Wu,Shicong Cui,Lingli Cheng,Xuechun Yang,Zheng Jiao
Nowadays, designing sensing materials possessing both high sensitivity and humidity resistance is still a challenge in the field of sensing materials. In this work, a ternary Ag nanoparticles decorated NiCo 2 O 4 /NiO (Ag/NiCo 2 O 4 /NiO) composite with hollow nanocage structure has been successfully obtained, which uses ZIF-67 as a template combined with self-etching method, followed by NaBH 4 reduction of silver ions. For the synergistic effect of the novel morphology, the presence of Ag nanoparticles and hydroxyl absorbent NiO, and the formation of p-p heterojunction between NiCo 2 O 4 and NiO, Ag/NiCo 2 O 4 /NiO exhibits good humidity resistance and high-sensitive to n-butanol. The mesoporous hollow nanocage morphology not only provides abundant adsorption sites for target gases, but also facilitates the diffusion of water molecules. The doping of Ag nanoparticles can regulate the adsorption of oxygen on the surface of gas sensing materials, improving the sensitivity while suppressing the hydroxyl poisoning reaction process. The hydroxyl absorbent NiO in Ag/NiCo 2 O 4 /NiO can both directly absorb water and form p-p heterojunction structure with NiCo 2 O 4 , which improves sensor performance while suppressing hydroxyl poisoning. In the gas sensing tests, the optimal Ag/NiCo 2 O 4 /NiO composites can achieve a high response value of 31.41, as well as rapid response/recovery times (65 s/47 s) to 100 ppm n-butanol at the working temperature of 170 °C. Moreover, it displays a wide detection range (1–120 ppm), a low detection limit (0.27 ppm), excellent selectivity to n-butanol, and superior long term stability (maintaining a response value of 84.68 % after 14 days). Notably, the optimal Ag/NiCo 2 O 4 /NiO demonstrates great humidity-tolerant ability with a response values fluctuation of 16 % under the range of 33 %-80 % relative humidity. This research provides a feasible approach for designing practical gas sensing materials with high sensitivity and moisture resistance.
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ENERGY
·
2025
·
IF 9.4
Fenhong Song,Jiaming Ma,Gang Wang,Ruibo Zhang,Jiawen Li,Jing Fan
Supercapacitors are essential to future energy systems, enabling efficient energy storage and management. Transition metal oxides are pivotal in advancing supercapacitor performance due to their redox activity and conductivity. Here, we synthesize a multi-element transition metal oxide composite (NiO-(NiFeCo)O) via a one-step hydrothermal method, forming self-assembled 3D rough nanorod networks. This architecture enhances ion transport, provides abundant active sites, and delivers a specific capacitance of 1414.54 F g −1 at 1 A g −1 , with 98.35 % capacitance retention after 3000 cycles. We further developed an asymmetric supercapacitor (ASC) using NiO-(NiFeCo)O as the positive electrode and rGO self-assembled on SiO 2 as the negative electrode. The ASC achieved a remarkable energy density of 66.0 Wh·kg −1 at 800 W kg −1 , alongside 88.46 % capacitance retention after 11,000 cycles. This design balances high energy/power density with exceptional stability, addressing critical challenges in next-generation energy storage. Our findings highlight the potential of NiO-(NiFeCo)O//SiO 2 /rGO ASCs for scalable, sustainable applications in advanced energy systems.
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MICROCHEMICAL JOURNAL
·
2025
·
IF 5.1
Linlin Chen,Qunlong Wang,Yuting Jing,Ruijing Wang,Xuefeng Wang
Excessive food pigments can be harmful to human health and in severe cases can cause cancer. Unlike conventional and time-consuming detection techniques, surface enhanced Raman scattering (SERS) is a fast, sensitive and accurate method. Ag NPs@NiO foam is developed as an efficient SERS substrate, featuring a large specific surface area and suitable charge transfer pathways. R6G can be detected at a concentration as low as 10 −14 M with an analytical enhancement factor (AEF) as high as 1.682 × 10 12 , demonstrating the high sensitivity of Ag NPs@NiO foam. In practical applications, Ag NPs@NiO foam is successfully used for the detection of food blue, amaranth, allura red in beverages, with the limit of detection lower than the safety limits in China. This facile and highly sensitive substrate provides a solid foundation for fast and accurate food analysis.
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ChemEngineering
·
2025
·Vol. 9
·期 4
·66
·
IF 3.4
Shang Peng,Zhao Liu,Pairuzha Xiaokaiti,Tiancheng Fang,Jiwei Wang,Guoqing Guan,Abuliti Abudula
In this study, a novel anode-supported solid oxide fuel cell (SOFC) comprising a Bi2O3-doped NiO-ScSZ anode and an ScSZ electrolyte was successfully fabricated via a low-temperature co-sintering process at 1300 °C. The incorporation of 3 wt% Bi2O3effectively promoted the sintering of both the anode support and electrolyte layer, resulting in a dense, gas-tight electrolyte and a mechanically robust porous anode support. X-ray diffraction (XRD) and scanning electron microscopy (SEM) analyses confirmed the formation of phase-pure, highly crystalline ScSZ with an optimized microstructure. Electrochemical performance measurements demonstrated that the fabricated cells achieved excellent power density, reaching a peak value of 0.861 W cm−2at 800 °C under humidified hydrogen fuel conditions. The cells maintained stable performance under dry methane operation, with a maximum power density of 0.624 W cm−2at 800 °C, indicating resistance to carbon deposition. Gas chromatographic analyses further revealed that the Bi2O3-doped NiO-ScSZ anode facilitated earlier and more stable electrochemical oxidation of methane-derived species compared with the conventional NiO-YSZ system, even under conditions of an elevated methane partial pressure. These findings demonstrate that Bi2O3co-doping, combined with low-temperature co-sintering, provides an effective approach for fabricating high-performance intermediate-temperature SOFCs with enhanced structural integrity and electrochemical stability. The developed methodology presents a promising pathway toward achieving cost-effective and durable SOFC technologies.
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JOURNAL OF HAZARDOUS MATERIALS
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2021
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IF 10.588
Hanyu Wang,Yanting Qi,Dan Wu,Qin Wei
In this study, lead(II) sulfide (PbS) nanocrystals were modified on nickel(II)oxide nanosheets (NiO NSs) via the chemical bath method. Afterwards, Au nanoparticles (NPs) were also modified successfully. A photoelectrochemical (PEC) self-powered platform for detecting sarcosine with high PEC activity was constructed. The capacity of NiO NSs to be loaded with other sensitizing materials was mainly attributed to its porous structure and large specific surface area. Under optimum conditions, the constructed PEC self-powered cathodic sensor for detecting sarcosine exhibited a linear range in 5.0 × 10 −8 –5.0 × 10 −2 mol/L with a detection limit (LOD) of 1.7 × 10 −8 mol/L. The biosensor demonstrated good reproducibility, acceptable stability and high specificity, thus confirming its potential application in the detection of other similar substances.
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Journal of Energy Chemistry
·
2020
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IF 7.216
Hao Xu,Yufang Cao,Yong Li,Pei Cao,Dandan Liu,Yongyi Zhang,Qingwen Li
Developing high power and energy supercapacitors (SCs) is a long-pursued goal for the application in transportation and energy storage station. Herein, a rationally-designed Co-doped nickel oxide nanosheets@carbon-welded carbon nanotube foam (Co-doped NiO@WCNTF) as freestanding electrode is successfully prepared for high power and energy SCs. The WCNTF framework with high specific surface area provides three dimensional highly conductive network for fast charge transport and ensures high loading of active materials (9.2 mg/cm 2 ). Moreover, porous Co-doped NiO nanosheets uniformly anchored on the WCNTF framework enable rapid charge kinetics due to the high intrinsic conductivity of Co-doped NiO nanosheets and their good contact with conductive WCNTF substrate. As a result, the unique integrated electrode with 3D architecture exhibits an ultrahigh specific capacitance of 11.45 F/cm 2 at 5 mA/cm 2 , outstanding rate capability (11.45 F/cm 2 at 5 mA/cm 2 and a capacitance retention of 86.2% at 30 mA/cm 2 ) and good cycling stability, suggesting great potential for high performance supercapacitor .
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Journal of Materials Chemistry A
·
2018
·Vol. 6
·期 42
·21131-21142
·
IF 9.931
Zhenbin Fang,Sajid ur Rehman,Mingze Sun,Yupeng Yuan,Shaowei Jin,Hong Bi
High specific capacity as well as good cycling stability are crucial for practical applications of supercapacitors, but actually the specific capacitances of transition metal oxide-based electrodes are still far below their theoretical predictions, and their cycling stabilities cannot satisfy the commercial standard due to intrinsically poor electronic conductivity and volume structural changes during charging/discharging processes. Here, we report the synthesis of a hybrid NiO–CuO mesoporous nanowire array with abundant oxygen vacancies which constructs a three-dimensional (3D) hollow architecture via a facile hydrothermal method and subsequent annealing. Compared to single-phase NiO or CuO, the increased O-vacancies on the NiO–CuO hybrid nanowires probably arising from a high number of lattice defects can promote their electronic conductivity, as revealed by XPS O 1s spectra, EPR characterization and HRTEM images. In addition, the 3D hollow structure together with mesoporous nanowires composed of alternately linked NiO and CuO nanocrystals can relax strain stress either in a hollow 3D structure or along a one-dimensional (1D)-direction nanowire, which not only provides a fast diffusion pathway for electrolyte ions and a high surface area with more active sites, but also helps to maintain the structural integrity during charge/discharge cycles. Therefore, the as-prepared NiO–CuO@Ni foam has a high areal capacitance of 4.35 F cm−2 and also a very high specific capacitance of 1450.8 F g−1 at a current density of 2 mA cm−2. Further, it can be utilized directly as a binder-free positive electrode, and assembled with a negative electrode based on a 3D porous graphene hydrogel (PGH) to construct an asymmetric supercapacitor, which shows a wide potential window of 1.6 V and an outstanding cycling stability of 90.4% capacitance retention after 5000 charge/discharge cycles.
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JOURNAL OF ELECTROANALYTICAL CHEMISTRY
·
2026
·
IF 4.6
Jiming Cao,Jiangpeng Yao,Yichen Ren,Mengting Sun,Chunyu Ou,Ruixin Li,Yahui Chen,Jingjing Zhang
Coupling waste biomass-derived carbon-supported transition metal oxide electrocatalysts with urea-assisted alkaline water splitting helps to reduce waste and pollution, while improving the efficiency of electrocatalytic hydrogen production. Herein, we report a waste cotton shell-derived carbon-supported Ni/NiO composite (Ni/NiO@C) synthesized via a straightforward pyrolysis strategy, enabling efficient valorization of agricultural biomass while significantly reducing catalyst cost. The optimized Ni/NiO@C-2 delivers exceptional bifunctional electrocatalytic activity, achieving a remarkably low overpotential of 117 mV for the urea oxidation reaction (UOR) and 228 mV for the hydrogen evolution reaction (HER) at 10 mA cm −2 , with the UOR exhibiting a Tafel slope as low as 22.18 mV dec −1 , underscoring its superior reaction kinetics. Notably, when employed as both the anode and cathode in a urea-assisted water electrolyzer, Ni/NiO@C-2 requires a cell voltage of only 1.55 V to achieve 10 mA cm −2 —substantially lower than that of conventional water splitting—while maintaining exceptional operational stability over prolonged electrolysis. The remarkable performance is attributed to the synergistic interplay between the hierarchically porous carbon architecture derived from natural cotton stalk, which ensures uniform dispersion of active Ni/NiO nanoparticles, and the enhanced charge transfer enabled by the well-integrated hybrid interface. This work not only establishes a sustainable platform for converting agricultural waste into high-performance electrocatalysts but also provides a viable pathway toward energy-saving hydrogen production through urea-assisted water splitting, offering a compelling strategy for simultaneous clean energy generation and wastewater treatment.
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高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2026
·
IF 12.5
Qi Shen,Yibin Liu,Jiarong Lu,Mengnan Ma,Zhonghao Qu,Xianbang Yin,Hao Yan,Shenliang Hou,Zhiyu Zhao,Shurong Wang,Xiang Feng,Chaohe Yang,Xiaobo Chen
The catalytic upgrading of bio-oil via hydrogen transfer deoxygenation necessitates catalysts capable of simultaneously activating C H bonds and oxygen-containing functionalities. Herein, we report a confined Ni@Y zeolite catalyst synthesized through a hydrothermal encapsulation approach, wherein NiO clusters are predominantly confined within the FAU micropore network and preferentially stabilized near the 12-membered ring junction regions connecting supercages and sodalite cages. Structural characterization confirms that this spatial confinement enhances metal dispersion, generates additional Lewis acid sites, and strengthens synergistic effect of metal and acid sites. Spectroscopic analyses combined with density functional theory calculations suggest that the intracrystalline NiO fraction stabilized in the 12-membered ring junction environment facilitate the activation of C H bonds and oxygen-containing functionalities. Owing to the synergistic interplay between well-dispersed metal sites and proximal acid centers, the Ni@Y zeolite exhibits superior catalytic activity in the hydrogen-transfer deoxygenation of salicylaldehyde with tetralin, achieving the highest deoxygenation efficiency (63.4%), highest water yield (3.6%), and lowest coke yield (6.1%), outperforming conventional HY and impregnated Ni/Y-IM zeolites. These findings provide mechanistic insights into the molecular-scale role of confined metal-acid synergy and offer theoretical guidance for the rational design of zeolite-based catalysts for bio-oil valorization.
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危险品化学品经营许可证（带存储）