APPLIED SURFACE SCIENCE
·
2021
·
IF 6.707
Kun Li,Xiao Chang,Xurong Qiao,Shifan Yu,Xiaofang Li,Fujun Xia,Qingzhong Xue
Metal-organic frameworks (MOFs) derived metal oxides, as a promising gas-sensing material, have received extensive attention because of its unique advantages of abundant pore structures, high surface areas and diverse compositions. In this work, hierarchical flower-like Zn-doped Co 3 O 4 derived from Zn/Co-MOF is prepared through a process of solvothermal synthesis and annealing. 3 mol% Zn-doped Co 3 O 4 exhibits the highest response of 52.3 toward 100 ppm acetone at 200 °C, which is nearly 20 times higher than that of pure Co 3 O 4 . Additionally, 3 mol% Zn-doped Co 3 O 4 based sensor displays a ppb-level detection limit for acetone, outstanding selectivity, excellent long-term stability and good independence to humidity. The probable reasons for the improved sensing properties are attributed to the changes of carrier concentration, specific surface area and chemisorbed oxygen amount due to Zn doping.
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高影响因子
ChemElectroChem
·
2017
·Vol. 4
·期 6
·1279-1286
·
IF 4.136
Jinling Zhou,Tongguang Ge,Xiangzhi Cui,Jian Lv,Hangle Guo,Zile Hua,Jianlin Shi
Graphical Upping the pace : A novel precious-metal-free cathode catalyst, Co 3 O 4 nanoparticle-incorporated m -Beta zeolite, is synthesized and used to speed up the sluggish oxygen reduction reaction through a synergistic catalytic effect. Cost-efficient and high-performance oxygen reduction electrocatalysts are widely pursued to boost the sluggish oxygen reduction reaction (ORR) for renewable-energy technology applications. Here, a novel precious-metal-free cathode catalyst, Co 3 O 4 nanoparticle-incorporated mesoporous Beta zeolite, was first synthesized by using a facile steam-assisted crystallization (SAC) and hydrothermal approach. Owning to the synergetic catalytic effects between the Co 3 O 4 nanoparticles and the mesoporous Beta matrix, the resulting Co 3 O 4 / m -Beta nanocomposites catalyst showed comparable ORR electrochemical catalytic activity to the benchmark 20 wt% Pt/C catalyst with a high onset potential of 0.88 V, and much higher methanol tolerance with a negligible negative shift of the peak potential and excellent electrochemical stability in alkaline media. The relatively higher surface Co 2+ concentration and the abundant Brønsted acid sites facilitate the ORR process, mainly through a 4e − pathway, which makes the Co 3 O 4 / m -Beta nanocomposite a favorable candidate for improving energy storage and conversion efficiencies in fuel cells.
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Catalysis Science & Technology
·
2025
·
IF 4.2
Xiaohui Wang,Zhuang Li,Peng Zhao,Chao Yao,Jie Meng,Shixiang Zuo,Wei Zhu,Jingwei Liu,Fengqin Wu
Natural manganese ore (NMO) has received extensive attention on account of its inherent stability, abundant reserves, and low cost. The higher specific surface area and abundant active sites are considered crucial for catalytic combustion. However, owing to the limited specific surface area inherent to natural manganese ore, we employed an acid etching activation treatment to enlarge the specific surface area of NMO (from 17.8 m2 g−1 to 48.9 m2 g−1). Herein, we successfully fabricated composite catalysts consisting of activated natural manganese ore (HNMO) and Co3O4 using the ethylene glycol sol–gel method and then evaluated them for the catalytic combustion of ethane. Results showed that the catalytic performance of the composite catalysts for ethane could not be enhanced monotonically by increasing the introduction of Co indiscriminately. Among them, the Co2-HNMO catalyst exhibited a higher specific surface area, increased Mn4+ and Co3+ contents and higher oxygen mobility, which were attributed to the significant interaction between Co3O4 and HNMO. The T90 of the corresponding Co2-HNMO catalyst was 294 °C under a space velocity of 40 000 mL g−1 h−1. This work presents new insights into the design and synthesis of efficient composite catalysts based on natural minerals.
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Journal of Environmental Chemical Engineering
·
2025
·
IF 7.2
Xingjian Zhang,Yuanfei Gao,Zhaoxia Si,Yuzhu Li,Yanhua Ding,Lin Guo
Integrating photothermal catalytic degradation functionality into solar-driven interfacial evaporation systems offers an efficient strategy for purifying organic wastewater and mitigating the accumulation of organic pollutants on solar absorber surfaces. In this study, a comprehensive solar energy utilization system was accomplished by synthesizing Co 3 O 4 porous nanosheets on the compacted stainless steel mesh (CSSM) as solar absorbers. This system simultaneously harnessed interfacial heat to drive water evaporation and enhanced photodegradation through photothermal effects. Under simulated sunlight irradiation, the system achieved an interfacial water evaporation rate of 1.39 kg m −2 h −1 and a photothermal degradation efficiency of 90.1 % for RhB, confirming their dual functionalities in water evaporation and photothermal catalytic treatment of wastewater. Furthermore, owing to the superior acid-base and corrosion resistance of CSSM, Co 3 O 4 /CSSM was well-suited for water purification applications across various water quality conditions. Under outdoor illumination, Co 3 O 4 /CSSM demonstrated a water evaporation rate of 1.04 kg m −2 h −1 and achieved nearly 100 % photothermal catalytic degradation efficiency for RhB. Additionally, the concentrations of Na⁺, Mg²⁺, Ca²⁺, and K⁺ in the evaporated water met the drinking water standards established by the WHO. This study, utilizing CSSM as a substrate the flexible material, introduces an innovative approach towards achieving zero-emission dye wastewater treatment.
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高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2025
·
IF 9.7
Kaiyue Zhang,Bin Feng,Hong Wang,Lijie Liu,Liang Hu,Hui Zhao,Zeyu Xu,Xihao Zhang,Jianguo Liu
Vanadium flow batteries (VFBs) face critical challenges in power density due to sluggish redox kinetics and inefficient mass transport. Herein, we propose a dual-functional strategy that synergistically addresses both limitations through precursor morphology engineering. By precisely regulating hydrothermal crystallization kinetics, cobalt carbonate hydroxide (CCH) precursors evolve from 1D nanorods to 2D nanosheets, which transform into Co 3 O 4 nanoarrays after annealing while retaining structural features. The resulting 1D rod-like architectures create open mesoporous channels for rapid ion diffusion, while defective Co 3 O 4 surfaces enriched with oxygen vacancies enhance redox kinetics. DFT calculations reveal that oxygen vacancies upshift the Co d-band center in Co 3 O 4 , strengthening vanadium ion adsorption and accelerating redox reactions. Finite element analysis demonstrates that the rod-like microstructure enhances mass transport and reduces concentration polarization, while its uniform potential distribution suppresses parasitic side reactions. As a result, the VFB with Co 3 O 4 @CF-90 achieves a high energy efficiency of 74.4 % at 300 mA cm −2 , outperforming conventional carbon felt by 9.7 %, and maintains 80.2 % efficiency at 200 mA cm −2 over 400 cycles. This work establishes a scalable morphology-induced vacancy engineering paradigm for high-performance flow battery electrodes, decoupling catalytic and transport optimization through precursor design.
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PubMed
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2025
·
IF 9.7
Junhao Tang,Minqiang He,Biyang Zhang,Kang Zhong,Zhengrui Yang,Zhaolong Wang,Xingwang Zhu,Huaming Li,Jinman Yang,Hui Xu
The utilization of heterojunction photocatalysts in photocatalytic CO 2 conversion has attracted significant attention. Nevertheless, the interface structure between the two components in the heterojunction material essentially decides the carrier separation efficiency and the performance of photocatalytic CO 2 reduction. The development of semiconductor heterojunctions with suitable materials and intimate interfacial contact is paramount. In this study, SnIn 4 S 8 /Co 3 O 4 heterostructures have been successfully fabricated by a facile hydrothermal synthesis method. The experimental results demonstrated that the established internal electric field effectively suppressed the recombination of photogenerated carriers and accelerated charge transfer kinetics. Meanwhile, the increased specific surface area endows SnIn 4 S 8 /Co 3 O 4 heterostructures with an improved CO 2 adsorption ability, ultimately achieving a significant improvement in photocatalytic activity. The highest formation rate of CO and CH 4 reaches 38.20 and 3.60 μmol g −1 h −1 . The design strategy reveals the potential of establishing intimate interfacial contacts as an extremely efficient catalyst for photocatalytic CO 2 reduction, facilitating effective charge separation. This work provides distinctive thoughts for the development of advanced catalytic material design for CO 2 conversion and other photocatalytic applications.
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高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2023
·Vol. 34
·期 5
·1-11
·
IF 2.8
Su Hao,Wang Qing,Dai Jianfeng,Li Weixue
Rational design of electrode materials is an important means to improve the performance of supercapacitors. In this paper, CoMoO 4 @Co 3 O 4 composite is prepared by hydrothermal treatment and sintering treatment using ZIF-67 as a self-supporting template. The CoMoO 4 @Co 3 O 4 electrode shows an excellent specific capacity of 2003 F g −1 at a current density of 1 A g −1 , and the capacity retention after 5000 cycles can reach 68% at a current density of 10 A g −1 . In addition, the asymmetric supercapacitor composed of CoMoO 4 @Co 3 O 4 composite and activated carbon (AC) shows an energy density of 56 Wh kg −1 at a power density of 750 W kg −1 and the capacity retention of 80% after 15,000 cycles at a current density of 10 A g −1 . The excellent electrochemical performance is attributed to the use of ZIF-67 as a self-supporting template to suppress the volume expansion and fragmentation of the CoMoO 4 @Co 3 O 4 electrode during charge and discharge.
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SCIENCE OF THE TOTAL ENVIRONMENT
·
2018
·
IF 4.61
Jing Deng,Mengyuan Xu,Shanfang Feng,Chungen Qiu,Xueyan Li,Jun Li
Ordered mesoporous Co 3 O 4 (OM-Co 3 O 4 ) displayed superior performance for peroxymonosulfate (PMS) activation. While, the separation and recovery of the catalyst after catalytic oxidation needed tedious operation. In this study, the as-synthesized iron-doped OM-Co 3 O 4 not only inherited the merits of ordered mesoporous materials such as high surface area and abundant mesoporous structure, but endowed them with ferromagnetism , facilitating their separation from the solution. Compared with spinel Co 3 O 4 , iron-doped OM-Co 3 O 4 showed superior catalytic activity , wide application scope, excellent reusability and long-term stability, fully validated that iron-doped OM-Co 3 O 4 can be a promising heterogeneous PMS activator for environmental application. High catalyst loading and PMS concentration were both beneficial to CIP degradation. The best CIP degradation occurred under base conditions. Chlorine and bicarbonate presented completely opposite two-side effects. The mechanism of CIP degradation was primarily attributed to SO 4 − and OH to a lesser extent. The rapid redox cycles of M 2+ /M 3+ (M = Co, Fe) and O 2− /O 2 ensured the continuous generation of reactive oxygen species and the efficient degradation of CIP. The cleavage of piperazine ring, hydroxylation and defluorination were identified as the main oxidation pathways for CIP degradation in iron-doped OM-Co 3 O 4 activated PMS system.
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高影响因子
Journal of Materials Chemistry A
·
2018
·Vol. 6
·期 8
·3454-3461
·
IF 9.931
Rui Luo,Chao Liu,Jiansheng Li,Chaohai Wang,Xiuyun Sun,Jinyou Shen,Weiqing Han,Lianjun Wang
The facile synthesis and engineering of highly active catalysts is an urgent requirement for the practical application of environmental remediation. In this report, we demonstrate the convenient synthesis of Co3O4-incorporated carbon composite (Co3O4/CC) by pyrolysis of a cobalt complex modified cotton cloth, which can be extended to other cellulose products (cotton, filter paper). Benefitting from the ultrafine Co3O4 particles with a mean particle size of ∼7.4 nm, the Co3O4/CC catalyst exhibits excellent performance for biphenol A (BPA) removal based on the sulfate radical (SO4˙−) process. Notably, as a proof-of-concept application, the Co3O4/CC packed column as a microreactor was designed and used in the continuous-flow reaction. Leveraging on the long half-life time period and high oxidability of SO4˙−, the degradation rate of BPA could increase above 95% at a flow rate of 2 mL min−1 when the total BPA solution reached to 1400 mL. The convenient synthesis of a high-performance catalyst and its efficient application to a continuous-flow reaction represent a further step towards practical application of SO4˙− based advanced oxidation processes.
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高影响因子
Journal of Energy Storage
·
2025
·
IF 9.8
Yong Tang,Jianwei Zhao,Yi Li,Yujing Wang,Guangqiu Zhang,Yihang Zhao,Lirong Qin
In this study, we synthesized Co 3 O 4 :Ce 3+ /Mn 2+ granular nanowires on nickel foam as an electrode for supercapacitors using a hydrothermal method. The introduction of Mn 2+ ions into the Co 3 O 4 :Ce 3+ electrode material increased the oxygen vacancy and Co 2+ /Co 3+ ratio of the material, resulting in an increase in electrical conductivity and electrochemical performance. In the three-electrode system, the Co 3 O 4 :Ce 3+ /Mn 2+ electrode achieved a specific capacitance of 2527.8 F/g at 1 A/g, which is 65 % higher than that without Mn 2+ ions. A symmetric supercapacitor (SSC) device was prepared by assembling two electrode components. At a current density of 1 A/g, the SSC device achieved a specific capacitance of 467.0 F/g, delivering a maximum energy density of 233.5 Wh/kg (1 A/g) and a maximum power density of 36,600 W/kg (20 A/g), coupled with outstanding cycling stability. These results indicate that the Co 3 O 4 :Ce 3+ /Mn 2+ nanowires coated nickel foam electrode holds considerable promise for applications in energy storage.
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高影响因子
GREEN CHEMISTRY
·
2025
·
IF 9.2
Wen-Jing Shi,Zhen-Hong He,Mei-Xia Yang,Yue Tian,Lu-Ting Pan,Xin-Yan Wei,Weitao Wang,Kuan Wang,Huan Wang,Zhao-Tie Liu
Utilizing renewable energy-derived H2 to convert CO2 into valuable chemicals represents a crucial strategy for achieving carbon emission reduction and enabling resource utilization. Conventional photocatalytic CO2 methanation, however, is hindered by low activity and inefficient energy utilization, limiting its practical application. In the present work, we developed a Cu and Nd co-doped Co3O4 catalyst that synergistically harnesses both light and thermal energy for photothermal catalytic CO2 methanation. The optimized catalyst with a molar ratio of 9/1/1 for Co/Cu/Nd (denoted as CCNO-9) achieves a remarkable CH4 formation activity of 27.3 mmol·gcat-1·h-1 at 200 °C, especially at ambient pressure. The incorporation of foreign Cu and Nd atoms in Co3O4 lattice induces the formation of abundant heterogeneous interfaces and oxygen vacancies, thereby exposing additional active sites for CO2 adsorption and activation. In-situ DRIFTS studies revealed that the Nd promotes the conversion of CO2 into *HCO3- and *COOH key intermediates. The photothermal synergy significantly enhances the reaction. Photoexcitation generates electrons and holes for CO2 reduction, while the thermal energy assists in overcoming the reaction energy barriers. DFT calculations confirmed that the CCNO-9 catalyst requires the lowest energy barrier for the rate-determining step from *COOH to *CH4. This study presents a very active and stable photothermal catalytic system for efficient CO2 conversion, advancing the development of low-carbon catalytic technologies.
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高影响因子
NANOTECHNOLOGY
·
2022
·Vol. 33
·期 21
·210001
·
IF 3.953
Yiwen Chen,Junguo He,Peigen Jiang,Heliang Pang,Xuhui Hu,Jie Zhang,Wenjing Zhang
The growing chloramphenicol (CAP) in wastewater brought a serious threat to the activity of activated sludge and the spread of antibiotics resistance bacteria. In this study, a highly ordered nanoporous Co3O4 layer on Co foil through anodization was prepared as cathode for nitro-group reduction and electrodeposited with Pd particles for dechlorination to reduce CAP completely. After 3 h treatment, almost 100% of CAP was reduced. Co2+ ions in Co3O4 served as catalytic sites for electrons transfer to CAP through a redox circle Co2+–Co3+–Co2+, which triggered nitro-group reduction at first. With the presence of Pd particles, more atomic H* were generated for dechlorination, which increased 22% of reduction efficiency after 3 h treatment. Therefore, a better capacity was achieved by Pd/Co3O4 cathode (K = 0.0245 min−1, K is reaction constant) than by other cathodes such as Fe/Co3O4 (K = 0.0182 min−1), Cu/Co3O4 (K = 0.0164 min−1), and pure Co3O4 (K = 0.0106 min−1). From the proposed reaction pathway, the ultimate product was carbonyl-reduced AM (dechlorinated aromatic amine product of CAP) without antibacterial activity, which demonstrated this cathodic technology was a feasible way for wastewater pre-treatment.
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