SEPARATION AND PURIFICATION TECHNOLOGY
·
2025
·
IF 9
Yanqing Cong,Yudi Wang,Jiajia Luo,Liwen Fan,Xinyun Li,Chenyi Wang,Xinyi Shen,Zihan Xu,Shi-Wen Lv
The pollution problem caused by fluorinated pharmaceutical is a big challenge facing humanity, and it is of great significance to develop an effective remediation method. Herein, Co 3 O 4 /g-C 3 N 4 composites with photocatalytic activity are synthesized and employed to activate Peroxymonosulfate (PMS) for the degradation of fluorinated pharmaceutical, and we bring about an interesting discovery that light irradiation can change the activation pathway of PMS. Due to the formation of internal electric field, Co 3 O 4 /g-C 3 N 4 composite exhibits very good charge transfer ability and offers more active sites. Thus, Co 3 O 4 /g-C 3 N 4 composite can quickly activate PMS to produce SO 4 •- , achieving effective degradation of ofloxacin with a reaction rate constant as high as 1.6813 min −1 . Once visible light irradiation is introduced, notably, the activation pathway of PMS over Co 3 O 4 /g-C 3 N 4 composite becomes non-radical mechanism based on 1 O 2 , which is mainly ascribed to the generation of O 2 •- . More significantly, anti-interference ability of Co 3 O 4 /g-C 3 N 4 -mediated PMS system is visibly enhanced under the visible light irradiation. To our surprise, consumed electrons of Co 3 O 4 /g-C 3 N 4 composite can be restocked by photogenerated carriers, thereby resulting in the regeneration of catalytic activity. During a long-term operation, Co 3 O 4 /g-C 3 N 4 -mediated PMS system always displays good performance in ofloxacin degradation. In short, current work shared some new insights into the research on the removal of fluorinated pharmaceutical.
✓ 已验证
DOI
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2025
·
IF 2.5
Wenjing Kong,Xueyun Zhong,Ying Yan,Yun Xing,Lei Liu,Chuan Yu,Leneng Yang,Xiaofei Song,Mingli Fu
With the widespread use of waterborne coatings, the treatment of volatile organic compounds (VOCs), which is also easy to produce odor pollution, has become the major concern of the air pollution control in coating industry. Since the deep oxidation of the butyl acetate (BA) molecule requires the involvement of a large amount of reactive oxygen species, the catalytic oxidation of BA was promoted by weakening the Co-O bond strength on the cobalt oxide surface. In this study, we adopted a simple sacrificial template approach to fabricate a series of specifically shaped and uniform Co3O4 catalysts for the catalytic oxidation of BA. The flake CM71-C catalyst showed the most excellent catalytic properties of BA (T50 = 197 °C, T90 = 215 °C). According to the characterization results, flake CM71-C has the largest specific surface area and the weakest Co-O bond, which is more conducive to redox and oxygen activation capabilities of catalyst. The results of In-situ DRIFTS studies showed that the surface reactive oxygen species were continuously recharged during the reaction due to the higher oxygen activation capacity, which accelerated the rapid decomposition of carboxylate, a key reactive intermediate species in the deep oxidation of BA. This study provides a practical and effective way to gain insight into the role of oxygen vacancies in the preparation of efficient catalysts with specific morphology for VOCs oxidation.
✓ 已验证
产品关联
DOI
高影响因子
RSC Advances
·
2025
·Vol. 15
·期 22
·17665-17674
·
IF 4.6
Hao Ji,Zelin Li,Zhenyi Xu,Lingmin Yao,Rui Tong,Shan Zhang
Developing an efficient visible-light-responsive catalyst for the hydrogen evolution reaction (HER) is essential for addressing energy scarcity and environmental pollution. In this study, one-dimensional Co3O4 (CO) nanoparticles were synthesized via electrospinning and subsequently sulfurized using a low-temperature solvothermal method. These sulfurized one-dimensional CO nanoparticles were then combined with two-dimensional sheet-like ZnIn2S4 (ZIS) to form a p–n heterojunction composite semiconductor photocatalyst (SCO/ZIS). The one-dimensional CO nanoparticles obtained through electrospinning significantly enhance the catalytic activity and efficiency, while sulfurization further improves their electronic structure and surface properties. The built-in electric field at the p–n heterojunction interface between n-type ZIS and p-type SCO effectively inhibits the recombination of photogenerated electron–hole pairs while facilitating electron transfer. Additionally, the incorporation of one-dimensional SCO into sheet-like ZIS prevents ZIS stacking, improving sunlight utilization and substantially enhancing photocatalytic HER performance. Our results demonstrate that SCO/ZIS achieves a superior HER rate of 4300.3 μmol g−1 h−1 under visible light, which is 7.45 times higher than that of pristine ZIS, while also exhibiting excellent photocatalytic stability.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
MICROCHEMICAL JOURNAL
·
2022
·
IF 5.304
Xun Zou,Yuying Chen,Zhiyuan Zheng,Mingyan Sun,Xiangfei Song,Peiru Lin,Jia Tao,Peng Zhao
Real-time monitoring of dopamine in living cells is of great significance to the research and biomedical diagnosis of many central nervous system diseases. Since the release of dopamine (DA) from cells is instantaneous and few, an analytical strategy with high sensitivity and rapid response to DA is highly in needed. In this report, a novel electrochemical sensing system constructed by nitrogen-doped graphene aerogel/Co 3 O 4 nanoparticles modified electrode (Co-NGA/GCE) was proposed. Benefiting from its effective conductivity, high surface area and catalytical activity, the Co-NGA/GCE performed an outstanding detection of DA from 0.05 − 200 μM and 200–1500 μM DA, with a limit of detection (LOD) of 12 nM, which was lower than most of the reported methods. It was proved that the Co-NGA/GCE was able to realize the real time monitoring of living cell-secreted DA under the K + stimulation. It is anticipated that the Co-NGA/GCE will not only serve as an ideal tool for DA assay, but also offer a robust alternative to the pathogenesis research and drug screening of central nervous system diseases.
✓ 已验证
DOI
高影响因子
ELECTROANALYSIS
·
2022
·Vol. 34
·期 11
·1756-1762
·
IF 3.077
Zhang Kaiyue,Li Juan,Xiong Lulu,Sun Wei,Li Ming Chang
A hollow Co 3 O 4 turtle shell-like structure (HS−Co 3 O 4 ) was synthesized from ZIF-67 and further employed for the first time to electrochemically real-time monitor dopamine (DA) released from living cells. X-ray powder diffraction, electron microscopy, X-ray photoelectron spectroscopy, electrochemical methods were used to study its physical and chemical properties and electrocatalytic behaviours. The as-prepared DA HS−Co 3 O 4 sensor accomplishes an outstanding limit of detection (LOD) of 3 nM, a broad linear range of 0.01–360 μM, good stability and high selectivity. It was further used to successfully real-time monitor DA released from living cells, demonstrating its great potential in practical applications in clinic diagnosis and bioscience research. The great sensing enhancement mechanism is investigated, revealing that the unique nanostructure not only provides a high density of active centers, but also more interestingly renders a unique mechanism by creating an atomic match between the adjacent Co ions catalysis centers and the two reaction atomic sites of DA for a fast 2-electron transfer path.
✓ 已验证
DOI
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2022
·Vol. 46
·期 23
·11350-11356
·
IF 3.925
Yanqing Cong,Wanxing Wang,Xiang Chen,Yi Zhang,Shi-Wen Lv
Nowadays, it is a challenging task to achieve the high-efficiency removal of emerging organic pollutants from wastewater. In the current work, a novel Co3O4@NiO-2 composite with great magnetic properties was synthesized by a facile hydrothermal method followed by calcination. Interestingly, the introduction of NiO could improve the specific surface area of Co3O4, while the presence of Co3O4 decreased the charge transfer resistance of NiO. The existence of magnetic properties created more flexibility for the separation and recovery of the catalyst. More importantly, the as-prepared Co3O4@NiO-2 exhibited excellent catalytic performance in PS activation, and the developed Co3O4@NiO-2/PS oxidation system could achieve the effective degradation of various organic contaminants, including TC, BPA, and phenol. During the TC degradation process, radical and nonradical pathways were involved in the PS activation, in which , ˙OH, , and 1O2 were the major active species. Furthermore, it was also noted that the Co3+/Co2+ and Ni3+/N2+ redox couples played a crucial role in PS activation for generating radicals, while the direct electron-transfer process among PS, Co3O4@NiO-2, and TCs was involved in TC degradation. In short, in the current study, not only a high-performance catalyst was synthesized for the PS activation, but also some novel insights for further research on the activation mechanism are shared.
✓ 已验证
DOI
高影响因子
ELECTROCHIMICA ACTA
·
2019
·
IF 5.383
Shi-Yuan Zhang,Hong-Lin Zhu,Yue-Qing Zheng
Transition metal oxides with hierarchical structures that grow on conductive substrates directly, which have been considered as promising catalysts for electrochemical catalysis. In this study, we used a stepwise synthesis method to prepare CuO nanoflake @Co 3 O 4 nanowire composite nano-arrays (denote as CuO/Co 3 O 4 composite), which show an excellent electrochemical performance. In the oxygen evolution reaction (OER), the CuO/Co 3 O 4 composite shows lower overpotential of 450 mV at the current density of 50 mA cm −2 and a smaller Tafel slope of 42 mV dec −1 in KOH solution (1 M, pH = 13.7). In the electrocatalytic CO 2 reduction reaction, the prepared CuO/Co 3 O 4 composite showed better CO selectivity in KHCO 3 aqueous solution (0.1 M, CO 2 saturated), the corresponding Faradaic efficiency of CO product reached 35.4%, and the product ratio of H 2 to CO was controlled by changing the potential values. The synthesis strategy reported here opens a way for designing high-performance electrodes for electrochemical catalysis and also provides new ideas for the construction of overall reaction (CO 2 + H 2 O → CO + O 2 ).
✓ 已验证
DOI
高影响因子
DALTON TRANSACTIONS
·
2017
·Vol. 46
·期 45
·15947-15953
·
IF 4.029
Ming Zhong,Dong-Hui Yang,Ling-Jun Kong,Wei Shuang,Ying-Hui Zhang,Xian-He Bu
Developing high-performance electrode materials to replace a traditional graphite electrode is critical for the commercialization of lithium ion batteries, which however still remains a great challenge. Herein, we report a suitable method to synthesize a series of well-dispersed nanostructured Co3O4–CoFe2O4 composites (CCFs) from bimetallic metal–organic frameworks (BiMOFs) with varied Fe3+/Co2+ molar ratios. When used as anodes for lithium ion batteries, the CCF-12 composite exhibits a maximum initial discharge capacity of 1328 mA h g−1, a reversible capacity of 940 mA h g−1 at 100 mA g−1 after 80 cycles, and a better rate capability in comparison with those of pure Co3O4 and other CCF composites. The well-dispersed structure and small particle size are believed to mainly contribute to the outstanding electrochemical performance of CCF-12 electrodes.
✓ 已验证
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2018
·
IF 3.779
Shan Yan,Lina Xu,Jun Jiang,Hongping Xiao,Xinhua Li
Single-material electrodes do not satisfy the demands of high-performance supercapacitors. To exploit the advantages of both oxides and carbon-based materials, a tightly packed Co 3 O 4 /NiCo 2 O 4 /NiO/C&S nanocomposite is fabricated by sintering a Co/Ni-based coordination complex precursor at 400 °C. The composites and basic components are characterized using various techniques, namely, X-ray powder diffraction, scanning electron microscopy, transmission electron microscopy , Brunauer–Emmett–Teller specific surface area analysis, and elemental analysis . The electrochemical performance is analyzed by cyclic voltammetry , galvanostatic charge/discharge cycling, and electrochemical impedance spectrometry . A uniform nanocomposite was found to be formed of NiCo 2 O 4 , NiO, and Co 3 O 4 nanoparticles , incompletely carbonized C, and incompletely vulcanized S. When used as supercapacitor electrodes, the synthesized composites show extra-long cycling stability (>20,000 cycles) during the charge/discharge process. This improvement in the cycle life of the composites is attributed to its highly stable structure. The roles of C and S in forming a stable structure are investigated. The results show that a supercapacitor with electrodes made from the as-prepared Co 3 O 4 /NiCo 2 O 4 /NiO/C&S composite will be promising for commercial applications.
✓ 已验证
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2025
·
IF 6.9
Yan Zhuang,Shuang Meng,Xue Yang,Dongxuan Guo,Dantong Zhang,Tai Peng,Yue Li,Jinlong Li
The formation of amorphous-crystalline heterojunctions has been recognized as an exceptionally effective strategy for enhancing the separation and transfer of photogenerated charge carriers, thereby improving photocatalytic efficiency. In this study, amorphous-crystalline MoS 2 /g-C 3 N 4 /Co 3 O 4 ternary heterojunctions with a unique flower-like structure were synthesized via the integration of g-C 3 N 4 nanosheets and amorphous MoS 2 onto Co 3 O 4 microspheres with a floral structure using a simple solvothermal method followed by acid treatment. Density functional theory (DFT) calculations revealed that the unique floral morphology, combined with the formation of amorphous-crystalline heterojunctions, facilitates the efficient transfer of photogenerated carriers while simultaneously suppressing the recombination of electron-hole pairs. The optimized MoS 2 /g-C 3 N 4 /Co 3 O 4 (3 %) heterojunction exhibited remarkable photocatalytic performance, achieving 82.1 % degradation of Rhodamine B (5 mg L −1 ) under visible-light irradiation within 90 min. Furthermore, the photocatalyst exhibited excellent stability and reusability, as confirmed through cycling experiments, and efficiently decomposed Rhodamine B and its intermediates into small, non-toxic molecules. This work highlights the successful development of a highly active, recyclable amorphous-crystalline ternary heterojunction with a flower-like structure, providing a novel and efficient strategy for the visible-light-driven removal of organic pollutants.
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2022
·
IF 9.965
Hong Zhao,Huixue Yao,Shuting Wang,Yali Cao,Zhenjiang Lu,Jing Xie,Jindou Hu,Aize Hao
Highly efficient oxygen reduction and oxygen evolution reactions have the critical role in the practical application of zinc-air batteries. Herein, doping engineering strategy has been adopted by construction of Se/Fe-doped in Co 3 O 4 /N-doped carbon nanosheets (denoted as Se/Fe-Co 3 O 4 /N-CNs) catalyst for boosting oxygen electrocatalytic activity. The achieved Se/Fe-Co 3 O 4 /N-CNs catalyst presents high-performances electrocatalytic characteristics, which exhibits a small overpotential gap (0.79 V), excellent oxygen evolution reaction activity with a small overpotential of 361 mV and a low Tafel slope of 57.3 mV dec −1 at 10 mA cm −2 as well as excellent oxygen reduction reaction activity with a large half-wave potential of 0.8 V, also surpassing the majority of reported Co 3 O 4 -based electrocatalysts. The outstanding catalytic performances are benefiting from the contributions between Se/Fe doping engineering and N-doped carbon nanosheets optimizing the electronic structure of Co species, endowing more active sites, enhancing the intrinsic catalytic activity and accelerating charge transfer rate for oxygen electrocatalytic process. Particularly, the as-fabricated zinc-air batteries with Se/Fe-Co 3 O 4 /N-CNs as air cathode presents a high open circuit potential of 1.41 V, a prominent highly efficient peak power density of 141.3 mW cm −2 , a high specific capacity of 765.6 mAh g −1 and energy density 861.3 Wh kg −1 at current density of 10 mA cm −2 as well as an excellent cycling stability, which are exceeding the commercial Pt/C-RuO 2 based zinc-air batteries. This work lays a foundation for design and development of high-performance bifunctional cobalt-based electrocatalysts for rechargeable metal-air batteries application.
✓ 已验证
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2021
·
IF 13.273
Jian Ji,Kebin Deng,Jianing Li,Zhihua Zhang,Xuezhi Duan,Haibao Huang
Despite substantial progress in various application fields of polyoxometalates (POMs), the use of POMs as ligands to alter the structure of solid catalysts in heterogeneous catalysis requires additional efforts. Herein, we used the reduced α-SiW 12 O 40 4- (RSTA) as an inorganic ligand to mediate Co 3 O 4 nanoparticles that efficiently promote the hydrolysis of NaBH 4 to generate hydrogen with multiple activities (4747 mL/(g cat ·min)) compared with NaBH 4 -pretreated Co 3 O 4 (1236 mL/(g cat ·min)), pristine Co 3 O 4 (inactive) and commercial Co 3 O 4 (inactive) at 25℃. RSTA induced both electronic and morphology effects on Co 3 O 4 through in situ driving 3D Co 3 O 4 nanoparticles to 2D Co 3 O 4 nanosheets with rich surface oxygen vacancies or Co 2+ during the hydrolysis process. This modulation by RSTA allowed more active sites, including both electron-rich Co 0 and electron-deficient Co 2+ , facilitating BH 4 - and H 2 O adsorption and thus hydrogen generation. The promoted mechanism of the RSTA on both the microstructure and the catalytic performance was further proposed.
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）