Science China-Technological Sciences
·
2025
·Vol. 68
·期 6
·1-17
·
IF 4.9
Guo Sijia,Tian Xikun,Yan Jun,Shang Chaolin,Zhao Changying
Thermochemical energy storage (TCES) under direct irradiation mode is a promising technology that promotes the widespread utilization of high-temperature concentrated solar energy. However, poor cyclic stability and solar absorption for calcium carbonates, high cost for cobalt oxides, and safety issues for powder-form materials hinder the practical applications of the TCES systems. This work innovatively proposed a compressed reactive TCES unit composed of 10%-volume of modified Co 3 O 4 in the center and 90%-volume of modified CaCO 3 around the center. The modified calcium-based compacted material (CaCO 3 M-p) exhibits 20.5°C lower onset temperature, 13.9 kJ mol −1 lower activation energy, and faster kinetics than the commercial CaCO 3 powder (CaCO 3 -u) in the energy storage process. Both the cyclic stability in 15 cycles and solar absorption of the CaCO 3 M-p are boosted, which are 1.25 times and 18.3 times those of the CaCO 3 -u, respectively. While compaction reduces the reactive performances by narrowing the porous, the Mn/Mg co-modification has a more significant effect in increasing the above properties by creating lattice defects and introducing impurities. The modified cobalt-based compacted material (Co 3 O 4 M2-p) presents similar reactive and optical properties as raw Co 3 O 4 powder, yet it elevates the average conversion rate in 30 cycles to 1.75 times that of compressed raw Co 3 O 4 . Modification by microcrystalline cellulose is the key to this improvement, as it reduces activation energy and promotes decomposition kinetics for compacted Co-based materials. The compressed reactive TCES unit demonstrates outstanding energy storage density and power. The 10%-volume Co 3 O 4 improves external radiation absorption and reinforces internal heat transfer, enhancing the unit’s energy storage rate. Moreover, Co 3 O 4 also contributes to energy density, raising the total density to 0.4217 MWh m −3 , exceeding the 0.2468 MWh m −3 limit of CaCO 3 powder. The compacted materials and composite unit advance the practical use of TCES in solar energy storage.
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Tao Li,Weikun Sun,Jian Zhang,Shengqin Liu,Hongbin Chen,Zumin Qiu,Jason Chun-Ho Lam
Herein, an efficient and stable catalyst of Co 3 O 4 @LDH-AC was innovatively prepared through uniform loading of an activated carbon substrate with Mg/Al layered double hydroxide (Mg/Al-LDH) followed by dispersing Co 3 O 4 nanoparticles in the confined space of LDH. This unique flower-like spherical structure significantly improved the adsorption capacity and would increase the concentration of reactants in the confined space. Experimental results showed that levofloxacin (LFX) completely degraded in 4 min with the addition of µM peroxymonosulfate (PMS). The fast conversion of Co 2+ and Co 3+ in catalyst for the generation of highly reactive species is revealed via EPR, in-situ Raman, in-situ FT-IR, and XPS. Further tests of 5Co 3 O 4 @LDH-AC in effluent of hospital wastewater treatment showed that it not only possessed strong anti-interference capabilities, but also maintained stable catalytic activity in fixed-bed reactor for a long operation time. Therefore, the excellent catalytic performance in confined space offers the possibility of application for the degradation of micropollutants in real pharmaceutical wastewater discharged from hospital (800–1200 tons/day, COD > 150 mg/L).
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Ziyi Wang,Yuqian Zhang,Chengping Li,Liang Wang,Ting Bian,Shitan Yan,Kuzmin Anton,Liuting Zhang
Incorporating solar steam generation with the hydrovoltaic effect presents a promising approach to concurrently addressing water scarcity and energy challenges. However, realizing a high water evaporation rate while simultaneously maintaining substantial electrical output in a single device remains a formidable obstacle. Here, this study presents a novel hydrovoltaic and galvanic effects-coupled evaporation platform (HGEP) for dual-function applications in freshwater production and electricity generation from seawater. Coating urchin-like Mn-doped Co 3 O 4 on inclined nickel foam (NF), the system achieves a stable evaporation rate of 1.77 kg m −2 h −1 in 3.5 wt% brine under 1 kW m −2 irradiation with a 30° tilt angle. The inclined structure facilitates unidirectional ion transport by establishing a salinity gradient, effectively preventing salt deposition for up to 8 h. Moreover, integrating Zr-Al electrodes effectively combines the hydrovoltaic and galvanic effects, enabling the HGEP to deliver a stable open-circuit voltage of 1.0 V and a short-circuit current of 1.5 mA—over an order of magnitude higher than the pure hydrovoltaic effect (0.49 V, 0.15 mA)—and achieve a maximum power density of 0.8 W m −2 . This study presents an innovative solar-powered water treatment technology that simultaneously achieves water production and power generation
✓ 已验证
DOI
高影响因子
COLLOIDS AND SURFACES B-BIOINTERFACES
·
2017
·
IF 3.887
Wei Zhang,Jinlai Dong,Yang Wu,Peng Cao,Lina Song,Ming Ma,Ning Gu,Yu Zhang
In this study, Co 3 O 4 nanopolyhedrons, nanocubes, nanoplates and nanorods were synthesized and characterized. Furthermore, the peroxidase- and catalase-like activities of these Co 3 O 4 nanoparticles (NPs) were studied and influence of the exposed crystal planes was explored. According to their morphology and peroxidase-like activity, dimercaptosuccinic acid (DMSA) modified Co 3 O 4 nanopolyhedrons synthesized via coprecipitation method (Co 3 O 4 NHs) were selected as a proper candidate for the immunohistochemical (IHC) detection of epidermal growth factor receptor (EGFR) expression in non-small cell lung cancer (NSCLC) tissues. Bivalent cobalt ions were coupled to the carboxyls on the surface of the obtained Co 3 O 4 NHs so as to chelate the hexahistidine residues (His-Tags) at the C-terminal of EGFR single-domain antibodies (EGFR sdAbs). Finally, the as-obtained EGFR sdAbs-binding Co 3 O 4 NHs (Co 3 O 4 nanoprobes) were successfully applied to the detection of EGFR expression in NSCLC tissues.
✓ 已验证
DOI
PubMed
高影响因子
FUEL
·
2023
·
IF 7.4
Fanggang Zhang,Sheng Su,Juan Wang
Aiming to achieve efficient utilization of high-energy–density fuels in the promising portable power systems, self-sustained combustion of n-decane over Co 3 O 4 -based catalysts in a narrow quartz reactor was investigated. Chemiluminescence, gas chromatography and various physicochemical characterization methods were used in this study. The evidences suggest that Co 3 O 4 -based catalysts can significantly reduce the ignition temperature and broaden the flammability limits of n-decane. The heat release stored in the catalyst bed can help improve the flame stability, delay the flame extinction, and achieve auto-ignition without forced heating. Besides, great promotion of the catalytic performance of Co 3 O 4 spinel is achieved by doping with 6 wt% PdO. PdO/Co 3 O 4 catalysts exhibit higher activity and enhanced ability in effectual resistance toward deactivate than pure Co 3 O 4 . Furthermore, the coupling of heterogeneous and homogeneous reactions of n-decane has been analyzed. It can be revealed that both the adsorbed and gaseous OH* radicals play greatly different roles when using different catalysts. These findings promote the use of heavy hydrocarbon fuels for energy supply and contribute to designing efficient Co 3 O 4 -based catalysts rationally.
✓ 已验证
DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2021
·
IF 4.539
Qiangbin Yang,Jibin An,Zhonghao Xu,Shuting Liang,Honghong Wang
Due to the carcinogenicity of atrazine, the effective removal of atrazine in water and soil has become the focus of attention. In the paper, the advanced oxidation technology based on sulfate radicals ( S O 4 · - ), which the visible light catalysis and nanocatalyst Co 3 O 4 /g-C 3 N 4 synergistically catalyzed to yield S O 4 · - , was constructed to efficiently degrade and remove atrazine. The Co 3 O 4 /g-C 3 N 4 was prepared through a simple solvothermal method, and its microstructure and composition were characterized by SEM and XRD. A series of experiments were carried out to degrade atrazine by Co 3 O 4 /g-C 3 N 4 activation of peroxymonosulfate under visible light, which revealed that the degradation efficiency reached to 78.5 percent in 35 min, CO 3 2− had a significant inhibitory effect on the degradation of atrazine in coexisting ions of NO 3 -, SO 4 2− , Cl- and CO 3 2− , the e -, ⋅OH, and S O 4 · - were mainly active species. Combined with density function theory calculations of Co 3 O 4 /g-C 3 N 4 , the high-efficiency degradation of atrazine was due to the synergetic enhancement between photocatalysis and Co 3 O 4 /g-C 3 N 4 catalyst in the constructed catalytic system.
✓ 已验证
DOI
高影响因子
FUEL
·
2022
·
IF 8.035
Yihua Yue,Zhongliang Huang,Dongren Cai,Shafqat Ullah,Abdul-Rauf Ibrahim,Xin Yang,Jiale Huang,Guowu Zhan
Controlled fabrication of spatial positions of different active sites on catalyst structures is critical to exploring the reaction mechanisms for CO 2 hydrogenation. Herein, two isomorphous zeolitic imidazolate frameworks (ZIF-67 and ZIF-8) were used as sacrificial templates to synthesize multi-layered Co 3 O 4 /ZnO catalysts with tunable core-shell structures and well-controlled spatial positions. The multi-layered catalysts were then evaluated for the catalytic performance for CO 2 hydrogenation. A series of characterization techniques were applied to investigate the morphology and structure of the Co 3 O 4 /ZnO composites with different spatial locations. Due to the unique multi-layered structure, the distinct interfacial structures, and the synergistic effects, the resultant core-shell structured Co 3 O 4 /ZnO nanocatalysts exhibited significantly enhanced activity as compared to their monometallic counterparts (pure Co 3 O 4 and ZnO). In addition, the ZnO@Co 3 O 4 with Co 3 O 4 as shell showed significantly higher CO 2 conversion (25%) than that of Co 3 O 4 @ZnO with ZnO as shell (0.82%). Furthermore, in-situ Diffuse Reflection Fourier Transform Infrared Spectroscopy (DRIFTS) analysis suggested that formate (HCOO*) and methoxy (CH 3 O*) species were the crucial intermediates in the CO 2 hydrogenation over the Co 3 O 4 /ZnO composite nanocatalysts. However, pure ZnO could not activate the CO 2 ; consequently, the use of the Co 3 O 4 /ZnO nanocatalysts derived from multiple-layered ZIFs structures provides new insights into improving the catalytic efficiency of CO 2 hydrogenation.
✓ 已验证
DOI
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2022
·
IF 9.221
Rongrong Jin,Yueru Jiang,Liupeng Zhao,Tianshuang Wang,Xiaomin Liu,Fangmeng Liu,Xu Yan,Peng Sun,Geyu Lu
In this paper, we successfully prepared Ru-doped Co 3 O 4 flower-like hollow microspheres by a simple hydrothermal method . The microstructure characterization results indicated the formation of well-organized microflowers with a size of 0.5–1 µm, which were composed of nanosheets . The gas sensing performances of sensors by using the synthesized Ru-doped Co 3 O 4 hollow microflowers as sensing material were investigated. The 1 at% Ru-doped Co 3 O 4 sensor showed the best acetone sensing performance and had a response 18.8–10 ppm acetone, which was almost 5.4 times that of pure Co 3 O 4 . Significantly, the sensor had an ultra-low detection limit, with a response value of 1.5–50 ppb acetone at 137.5 °C (30%RH). We propose a plausible mechanism for sensing performance improvement. Namely, the substitution of Ru 4+ regulated the carrier concentration and induced the change of Co 3 O 4 defect oxygen and chemisorbed oxygen.
✓ 已验证
DOI
高影响因子
JOURNAL OF POWER SOURCES
·
2016
·
IF 6.333
Ruchun Li,Dan Zhou,Jiaxian Luo,Weiming Xu,Jingwei Li,Shuoshuo Li,Pengpeng Cheng,Dingsheng Yuan
Electrochemical water splitting has attracted great interest because of the growing demand for sustainable energy and increasing concerns for the environment. We present a facile strategy to design the three-dimensional (3D) urchin-like sphere arrays Co 3 O 4 as an effective bifunctional catalyst for electrochemical water splitting. The 3D urchin-like Co 3 O 4 was directly grown on Ni foam by a hydrothermal reaction and annealing treatment at a low temperature. This process offers several advantages including facile synthesis, binder-free, and low cost. The 3D urchin-like Co 3 O 4 as a catalyst for hydrogen evolution reaction exhibits a low onset potential (−130 mV vs. RHE) and good cycling stability in an alkaline electrolyte . When urchin-like Co 3 O 4 is used as a catalyst for oxygen evolution reaction , the onset potential is at 1.46 V (vs. RHE) with a low overpotential of only 230 mV. The good catalytic activity can be attributed to the unique urchin-like nanostructure , abundant mesopores, and low charge-transfer resistance (compared with Co 3 O 4 NPs). In addition, H 2 and O 2 generation was performed using Co 3 O 4 as both cathode and anode catalysts with a potential of 1.64 V to reach a current density of 10 mA cm −2 .
✓ 已验证
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2020
·
IF 3.83
Bo Yu,Fanming Meng,Muhammad Wasim Khan,Rui Qin,Xingbin Liu
Traditional bulk photocatalysts often experience serious charge recombination and poor visible-light capturing, resulting in inefficient photocatalytic activity. However, proper nanostructure design usually helps to increase the activity of composite photocatalysts. Here, hollow TiO 2 @g-C 3 N 4 /Co 3 O 4 core-shell microspheres are first reported. The hollow structure of the heterostructured will directionally separate the photogenerated carriers, and the photogenerated holes transferred to the surface will be further captured by Co 3 O 4 to achieve an exposed oxidized surface. The novel multi-stage hollow microspheres can simultaneously achieve effective transfer of photogenerated carriers and extended light absorption. Benefiting from these structural and compositional characteristics, the optimized TiO 2 @g-C 3 N 4 /Co 3 O 4 nanospheres have excellent photodegradation activity for tetracycline and MO. Under simulated sunlight, the degradation rates of TC (10 mg/L) and MO (25 mg/L) at 60 min are 91.6% and 97.8%, respectively. At the same time, high activity is maintained after multiple cycles of testing. Possible transfer paths for photogenerated carriers have also been proposed. This work will provide more inspiration for the design of multi-stage hollow photocatalytic systems.
✓ 已验证
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2024
·
IF 8.1
Fu-Kai Tang,Xiao-Ran Wang,Feng Ge,Wen-Ming Pei,Jing-Jing Yun,Shi-Wen Lv,Tong Wei
Herein, hollow carbon sphere (HCS) is constructed via hard template method for loading the Co 3 O 4 , and obtained catalyst (namely Co 3 O 4 /HCS) is then employed to activate peroxymonosulfate (PMS) for the removal of tetracycline (TC). Owing to high specific surface area and good conductivity of HCS, Co 3 O 4 modified with HCS exhibits low interface resistance and fast charge transfer rate. Meanwhile, hollow structure of HCS can provide spatial confinement effect for Co 3 O 4 and accelerate the mass transfer process between Co 3 O 4 and PMS. As predicted, peroxy bond break of PMS over Co 3 O 4 /HCS is significantly boosted compared with pure Co 3 O 4 , so reaction system can produce more SO 4 •– , OH • , 1 O 2 and high-valent metal complexes to conduct TC degradation. Importantly, Co 3 O 4 /HCS-mediated electron transfer process between PMS and TC is also involved in TC degradation. As a result, Co 3 O 4 /HCS shows excellent performance in TC degradation, and the highest removal efficiency of TC is more than 95 % within 10 min. Benefiting from the protective effect of HCS, only a small amount of Co ion is released from Co 3 O 4 /HCS during the reaction process. Besides, Co 3 O 4 /HCS possesses good reusability and anti-interference ability. In short, current work provides a promising catalyst for PMS activation to treat wastewater containing antibiotic.
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Renquan Wu,Yijing Sun,Xuzhou Jiang,Shanxin Li,Sichen Guo,Hongying Yu
In response to the increasing challenges posed by electromagnetic pollution, The development of high-performance microwave absorbing materials is increasingly urgent. This study addresses this challenge through synergistic engineering of hierarchical architectures and magnetic-dielectric components, proposing a sequential templating strategy to fabricate hierarchical multi-shell hollow porous (HMSHP) NiO/Co 3 O 4 nanospheres. Systematic characterization reveals that the HMSHP architecture can effectively improve the impedance matching, reduce the material density, extend the microwave transmission path, and significantly enhance the conduction loss and interface polarization loss. In addition, the NiO/Co 3 O 4 heterointerfaces induce polarization loss caused by lattice defects in the shell and magnetic loss due to the magnetic metal oxide components, which synergistically enhance electromagnetic energy conversion. The 3-shell hollow porous NiO/Co 3 O 4 nanospheres (3-NCO) demonstrated superior microwave absorption performance. Specifically, at a low filler ratio (20 wt%) and a thin thickness (2.1 mm), the 3-NCO nanospheres exhibited a significant absorption capacity (−67.62 dB) and a wide effective absorption bandwidth (7.68 GHz). This work reveals a nanostructure design route for designing lightweight, broadband microwave absorbers through rational integration of structural hierarchy and interfacial engineering, offering actionable strategy to fabricating novel microwave absorption nanomaterials.
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）