ChemPlusChem
·
2022
·Vol. 87
·期 11
·e202200290
·
IF 3.21
Wenjuan Bai,Bozheng Wang,Shaobo Yang,Song Yan,Chaochao Cao,Zheng Zhou,Jiawei Ji,Kai Guo,Chengchun Tang
Graphical A bimetallic oxide co-modified CuO−Co 3 O 4 /P−BNFs material is reported in this work, which significantly improved the adsorption performance on TCs, and the removal rate of TCs was more than twice that of P−BNFs under the same conditions. The presence of antibiotic contaminants in aqueous environment already poses significant risks to ecological sustainability, biodiversity and human public health and safety. Therefore, it is urgent to develop practical water pollution control technologies and new materials. Here, we prepared CuO−Co 3 O 4 co-modified porous boron nitride fibers (P−BNFs) for the adsorption and removal of tetracycline antibiotics (TCs) in aqueous environment. The prepared adsorbents were characterized by XRD, FTIR, XPS, SEM, TEM and BET, and the adsorption behavior was explored by batch experiments. The results show that the removal percentage for doxycycline (DC) reaches 98.68 %, which was much higher than that of P−BNFs, and the modification results of P−BNFs with CuO or Co 3 O 4 alone. After five regeneration cycles, the removal rate of DC by CuO−Co 3 O 4 /P−BNFs was still as high as 89.33 %. This is promising and indicates that the prepared CuO−Co 3 O 4 /P−BNFs adsorbent has good renewable recycling performance and practical application prospects.
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PubMed
高影响因子
APPLIED SURFACE SCIENCE
·
2022
·
IF 7.392
Kean Chen,Binxian Chu,Qiuju Qin,Xuemei Ou,Runqi Zhao,Xiaoling Wei,Huan Wu,Bin Li,Lihui Dong
As an ideal substitute for the precious metals in the selective catalytic reduction of NO by CO, transition metal oxides perform very well. Thus, a series of CuO - Co 3 O 4 symbiotic oxide porous nanosheet catalysts are prepared with a CTAB-assisted hydrothermal method. Cu5 with the ratio of Cu and Co is 5 : 10, has the best activity on the premise of maintaining the nanosheet structure. Reduction pretreatment of Cu5 with H 2 is carried out, and the surface will be rapidly oxidized in air. In this period, Cu, CuO and Co 3 O 4 were produced and coexisted on surface. Cu5-re-163 exhibits greatly higher N 2 selectivity but a little inferior NO conversion. Further DFT calculation and characterizations proved that [N] free radicals exist during the reaction. The reaction on Cu5 and Cu-re-163 follow L-H and E-R mechanism respectively. [N] radicals on the latter are much easier to desorb, so that they are easy to combine with each other to form N 2 rather than with NO to generate N 2 O, as the reason why Cu5-re-163 has better selectivity.
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高影响因子
APPLIED SURFACE SCIENCE
·
2023
·
IF 6.7
Yuanzhong Li,Liling Li,Yufa Feng,Huize Wang,Jinyun Liao,Jianwei Ren,Weiyou Zhou,Mingyang He,Hao Li
Engineering and fabricating cost-effective and high-performing bifunctional catalysts for ammonia borane (AB) hydrolysis and methanolysis is paramount for their commercial availability. A series of rattle-structured CuO/Co 3 O 4 @C microsphere bifunctional catalysts for AB hydrolysis and methanolysis were produced using a simple hard template etching approach. The CuO/Co 3 O 4 @C-4 (4 refers to designed the mole ratio of Cu/Co) exhibits the best activity with TOF of 18.8 and 26.8 mol H2 ·mol cat -1 ·min −1 for AB hydrolysis and methanolysis, respectively. It is discovered that the excellent performance is mainly attributed to its unique rattle structure and the synergetic effect between Co 3 O 4 and CuO . Kinetic isotope effect (KIE) experiments and infrared spectroscopy were applied to investigate AB hydrolysis and methanolysis reaction mechanisms. A suggested mechanism for AB methanolysis on rattle-structured CuO/Co 3 O 4 @C-4 is proposed based on the experiment results. This work could provide useful guidance for the construction of high-performance bifunctional catalysts for AB hydrolysis and methanolysis for hydrogen production.
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高影响因子
APPLIED SURFACE SCIENCE
·
2026
·
IF 6.6
Ao-tian Gu,Xiao-jun Dai,Pei Liu,Jian Chen,Lei-Lei Gu,Peng Wang,Chun-hui Gong,Yi Yang
MOF-derived CuO/Co 3 O 4 heterojunctions were constructed for efficient PMS activation. • The interfacial built-in electric field induces directional electron transfer from Co to Cu. • High-valent metal species and non-radical pathways dominate BPA degradation. • Enhanced PMS adsorption promotes O − O bond cleavage and a non-radical pathway. Efficient removal of phenolic endocrine disruptors, such as bisphenol A (BPA), remains a significant challenge in complex aquatic environments. In this study, a CuO/Co heterojunction catalyst (CuCo-NC X ) was developed by anchoring Co 3 O 4 nanoparticles onto MOF derived CuO/carbon composites for the high-performance activation of peroxymonosulfate (PMS). The CuCo-NC/PMS system exhibited superior catalytic activity, achieving a 97.8% removal of BPA within 40 min, with a corresponding apparent rate constant of 0.1111 min −1 . Furthermore, it demonstrated exceptional anti-interference capability and selectivity in complex aqueous matrices containing various co-existing anions and natural organic matter. Density functional theory (DFT) calculations and systematic characterization revealed that a built-in electric field (BIEF) formed at the CuO/Co 3 O 4 interface strongly drives directional electron transfer from Co sites to Cu sites. During the catalytic process, the electron-rich Cu acts as an electron reservoir, significantly promoting the Co redox cycle through an electron feedback effect, which induces the generation of high-valent metal species (HVMs) and optimizes the PMS activation pathway. This study not only develops a high-performance catalytic platform for eliminating endocrine disruptors but also provides new insights into modulating heterogeneous catalytic pathways via interfacial BIEF. Download: Download high-res image (198KB) Download: Download full-size image
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高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Feng Chen,Xuebin Lin,Wei Chen,Na Wen,Yanqiao Jin
The design of a highly active Cu-Co catalyst for catalytic transfer hydrogenolysis of lignin without the use of external hydrogen remains highly challenging. In this work, Cu 2 O was initially encapsulated in ZIF-67, and subsequently Cu 2 O@ZIF-67 was utilized as a precursor and sacrificial template to prepare the unique double core–shell hollow nanocage CuO@Co 3 O 4 . Co and Cu, serving as Lewis acid sites and dehydrogenation sites for the hydrogen-donor solvent isopropanol, respectively, exhibited synergistic enhancement, further increasing the catalytic activity. Under the optimal conditions of 220 °C, 1 MPa N 2 , and 4 h, the catalyst achieved 100 % conversion of 2-phenoxy-1-phenylethanol and 100 % yield towards cyclohexanol and ethylbenzene. Furthermore, the catalyst remained stable and reusable after 5 cycles, providing a practicable guidance for the value-added conversion of lignin.
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高影响因子
Journal of Energy Storage
·
2024
·
IF 8.9
Bairui Tao,Xiaoyan Feng,Fengjuan Miao
In order to solve the problem of glucose detection in medical development and meet the urgent demand for new energy storage devices, this paper proposes a new material suitable for glucose sensing and capacitive properties. The sensor was fabricated by depositing Co 3 O 4 nanoparticles onto nickel foam with integrated r-GO via the hydrothermal method, followed by the synthesis of CuO nanoparticles using electroplating. The detection range of the sensor is 0.3–11.3 mM. The sensor's sensitivity is 1000.3 μA mM −1 cm −2 , indicating its responsiveness to changes in analyte concentration. In electrochemical test systems, Signal-to-Noise Ratio (SNR) usually represents the relative intensity of the effective current signal and the background noise, reflecting the accuracy and reliability of the measurement. When the SNR is three, the minimum detection limit is 0.431 μM, highlighting its ability to reliably detect analytes at low concentrations amidst background noise. According to electrochemical workstation tests, the sensor demonstrates robust stability. Furthermore, the electrode material proves suitable for asymmetric supercapacitor devices, when the current density is 2 Ag −1 , the specific capacitance is 660.5 Fg −1 . At the same time, we also explore the cyclic stability of the device, which can retain 92.3 % of its initial specific capacitance after 5000 cycles, showing its remarkable long-term stability. In addition, the prepared nanocomposites can also light the red LED light. The results show that the synthesized CuO/Co 3 O 4 /r-GO/NF electrode can be used for electrochemical glucose sensing and supercapacitors, and plays an important role as a multi-functional material in the fields of medical, food, electronics, transportation and energy, providing key technical support for a variety of applications.
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高影响因子
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