JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2013
·
IF 3.172
Youcheng Zhao,Xinyu Song,Zhilei Yin,Qisheng Song
Controlled synthesis of CuO with various hierarchical structures consisting of self-organized nanoparticles is realized by using n-octylamine (OLA) as a structure inducing agent via a facile hydrothermal synthetic method. The growth and assemblage of CuO can be finely tuned by selecting the preparative parameters. In particular, it is found that the degree of the hierarchical organization can be modulated by simply changing the amount of the n-octylamine and CuO nanoparticles exhibit self-assembled two-dimensional (2D) sheet-like, three-dimensional (3D) disk-like and bowknot-like architectures, respectively. In the present case, OLA serves as a capping surfactant that can modulate growth of CuO nanocrystals via hydrophobic forces between the OLA molecules. CuO nanoparticles can be self-assembled into different complex architectures depending on the strength of hydrophobic forces. Hierarchical sphere-like CuO assembled from nanorods can also be easily fabricated by adjusting the starting NaOH to CuCl 2 volume ratio, in which OLA serves not only as the structure-directing agent, but also as a weak base agent to produce hydroxyl anions. The electrochemical performances of the as-synthesized different products for sensing nitrite oxidation are evaluated. The results reveal that the electrocatalytic activity is related to the secondary nanostructures. Compared to the others, the bowknot-shaped and sphere-shaped CuO products exhibit excellent electrocatalytic activity toward nitrite oxidation and fast current response in nitrite sensing because of their peculiar hierarchical structures with high BET surface areas and well-ordered pores.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Pigment & Resin Technology
·
2025
·
IF 1.5
Bingxin Wang,Dawu Shu,Xinqi Zhang,Fangfang An,Guoqing Zhang
Purpose This study aims to develop a copper oxide (CuO)-modified loofah biochar catalyst (CuO@LSC) for the activation of peroxymonosulfate (PMS), enabling the efficient degradation of C.I. Reactive Red 218 (RR218) in dye wastewater. Design/methodology/approach The study systematically examined the influence of various factors on the degradation of RR218, including initial pH, PMS concentration, CuO@LSC catalyst concentration, reaction temperature and the type and concentration of ionic species. Furthermore, the degradation mechanism of RR218 via free radical pathways was thoroughly investigated. Findings Under the conditions of 0.125 g/L CuO@LSC catalyst, 0.25 g/L PMS, at 25°C, and an initial pH of 9, a reaction time of 30 min achieved a degradation of up to 98.20%. Despite a 4.18-fold slowdown in dye degradation with sodium chloride (NaCl), the final degradation efficiency still reached 98%. In contrast, the addition of sodium sulfate (Na 2 SO 4 ) inhibited dye degradation, resulting in a degradation of less than 90%. Furthermore, the experimental results confirmed that dye degradation occurs due to the combined action of sulfate radicals (SO 4 •− ), singlet oxygen ( 1 O 2 ) and hydroxyl radicals (·OH). Originality/value This study successfully achieved the rapid treatment of dye wastewater, offering valuable insights for its recycling and reuse.
研究领域:
环境科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY
·
2023
·
IF 6.1
Renjie Xie,Jianbin Lu,Jian Wang
The detection of dissolved gases in the oil of oil-immersed transformers is essential to evaluate the operating status of oil-immersed transformers. In this study, a CuO/TiO 2 /N-MWCNTs composites-based sensor was fabricated by hydrothermal method for the detection of dissolved CO gas in oil. The introduction of N-MWCNTs with high specific surface area, high electrical conductivity and multiple adsorption sites effectively improved the response value and response/recovery performance for CO. The response can reach 4.33 at a CO concentration of 50 ppm, which is 1.74 times higher than that of the CuO/TiO 2 sensor. In addition, the prepared sensor presents a fast response/recovery time (230 s/60 s) to CO, and has excellent selectivity and long-term stability. Finally, a multi-concentration CO alarm system was constructed through a reasonable circuit design. It is shown that the CuO/TiO 2 /N-MWCNTs-based sensor can achieve high-precision CO detection, which can provide a new idea for the detection of dissolved CO gas in the oil of oil-immersed transformers.
研究领域:
材料科学
·
传感器技术
·
电气工程
✓ 已验证
产品关联
DOI
高影响因子
PROCESS SAFETY AND ENVIRONMENTAL PROTECTION
·
2020
·
IF 4.966
Xin Chen,Jiabin Zhou,Yi Chen,Ying Zhou,Lidan Ding,Hong Liang,Xi Li
In this study, we synthesized CuO modified BiVO 4 composite (CuO-BiVO 4 ) and used it to construct a novel coupling system, in which two processes of photocatalysis and peroxymonosulfate (PMS) oxidation processes were integrated together to synergistic remove tetracycline hydrochloride (TC−HCl). XRD , XPS , FESEM , EDS, PL and UV–vis DRS techniques were applied for characterization of the catalyst features. CASTEP procedure of MS software was employed to calculate the electronic structure of the catalyst. The catalytic performance of CuO-BiVO 4 + Vis + PMS system was investigated under impact of different variables such as CuO loading amount, pH, PMS dosage, catalyst dosage, temperature and co-existing ions. Compared with the individual photocatalysis or peroxymonosulfate oxidation process, the catalytic performance of the coupling system was significantly improved. Under visible light irradiation, 100 mL of 80 mg/L TC−HCl solution was completely degraded using 2 mM PMS activated by a CuO-BiVO 4 composite in 50 min without adjust pH, and the system synergistic index reached 3.04. The improved catalytic activity is due to the effective separation of photogenerated electrons-holes and the availability of more activation PMS sites. After five cycling experiments, the degradation rates of TC−HCl were reduced slightly to 94 %, which indicated the catalysts exhibited excellent reusability and stability for its practical applications. Active species trapping experiments and ESR tests confirmed that SO 4 ·− ,·OH, h VB + , O 2 ·− and 1 O 2 worked together for the TC−HCl degradation. Furthermore, the possible reaction mechanism of the coupling system was proposed, and the degradation intermediates of TC−HCl were identified by LC MS. In conclusion, integration of CuO-BiVO 4 , Vis and PMS exhibited an excellent performance for TC−HCl degradation within 50 min reaction, which could be introduced as an effective and promising method for the wastewater treatment .
研究领域:
环境科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2019
·
IF 5.155
Qi Lian,Han Liu,Xuefang Zheng,Xiaoming Li,Fengjie Zhang,Jing Gao
A general method for the preparation of Pt doped CuO/Pt nanoflowers (CuO/Pt NFs) for peroxidase mimicking has been demonstrated via hydrothermal method . Pt ions could be reduced to Pt nanoparticles by using the ascorbic acid (AA) as reducing agent and Pt ions were uniformly doped in the CuO nanoflowers by using the bovine serum albumin (BSA) as the stabilizer . The obtained CuO/Pt NFs exhibited a higher peroxidase-like catalytic activity than individual CuO and Pt nanoparticles alone, which could be ascribed to their synergistic effect. In the presence of hydrogen peroxide (H 2 O 2 ), the CuO/Pt NFs could catalyze the oxidation of chromogen 3,3′,5,5′-tetramethylbenzidine (TMB) to a blue color product. The peroxidase activity of CuO/Pt NFs was selectively inhibited by Hg 2+ due to form the CuO/Pt-Hg trimetallic amalgam . However, the inhibition was not affected by other metal ions . Therefore, a novel colorimetric biosensor was developed for sensitive detection of mercuric ions by using CuO/Pt NFs. This method exhibited a wide response linear range, low limit of quantification values, excellent sensitivity and selectivity for detection of Hg 2+ in various ground water samples, which was verified with CVAAS. With the advantages of rapid response, simple operation, naked-eye observation and low cost, the colorimetric CuO/Pt NFs sensor showed bright prospects for detection of Hg 2+ in various water samples and public drinking water distribution systems .
研究领域:
环境科学
·
生物化学
✓ 已验证
产品关联
DOI
高影响因子
Surfaces and Interfaces
·
2023
·
IF 6.2
Tianbo Jia,Linlin Wang,Lina Zhang,Zhouhao Zhu,Kun Zhang,Baikang Zhu,Xin Li,Chunyang Zhai,Shunli Li,Yingtang Zhou,Hengcong Tao
Electrochemical carbon dioxide reduction (ECR) to ethylene by using renewable energy is a viable way to tackle the global climate change, and beneficial to facilitate closing the carbon cycle . Herein, a sulfur-doped spherical coral-like CuO (S-CuO) catalyst was facile synthesized, which is enabling efficient conversion CO 2 -to-C 2 H 4 . The obtained 5% S-CuO can reach the Faradaic efficiency (C 2 H 4 ) of 48.4% with a current density of 15 mA cm −2 at -1.3 V vs. RHE, which maintained stability over 20 h in 0.1 M KHCO 3 electrolyte. XPS , SEM, TEM, and XRD were applied in the characterization of the materials. EPR, CO 2 adsorption measurements and density functional theory calculations results indicate that the incorporation of S can promote CO 2 adsorption, activation and the formation of *COOH intermediate, which is boosting CO 2 conversion enabling the high selectivity to C 2 H 4 . Compared to unmodified CuO, electrocatalytic studies show that the greatly increased C 2 H 4 activity on S-CuO is because of the fast electron transfer . Meanwhile, the contact angle measurement reveals the excellent selectivity is derived from the suppression of the hydrogen evolution reaction after the S doping.
研究领域:
材料科学
·
环境科学
·
催化化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2024
·
IF 9.4
Jinyun Liao,Yuanzhong Li,Jingjing Tian,Yufa Feng,Quanbing Liu,Hao Li
Catalytic methanolysis of ammonia borane is an integrated hydrogen production/storage technology with bright prospects, while its wide application is impeded by the high-cost of catalysts. In this work, hollow core@shell structured (HCSS) Co 3 O 4 @CuO-NiO with a size of 300–500 nm and a shell thickness of ca. 100 nm has been designed for ammonia borane (NH 3 BH 3 ) methanolysis for rapid hydrogen release. The possible formation mechanism of HCSS-Co 3 O 4 @CuO-NiO is proposed based on a series of characterization results, which is crucial for the design and preparation of nanocatalysts with similar architectures. Benefiting from the optimized compositions and electronic structures, the best HCSS-Co 3 O 4 @CuO-NiO sample exhibits high catalytic activity in NH 3 BH 3 methanolysis with a turnover frequency of 67.1 min −1 , surpassing that of all the noble-metal-free catalysts in previous reports. A possible reaction mechanism of NH 3 BH 3 methanolysis is put forward based on the in-situ Fourier transform infrared spectrometer (FTIR) characterization and kinetic isotope effect (KIE) experimental results. This work supplies a novel avenue for developing cheap and robust catalysts towards NH 3 BH 3 methanolysis by tailoring the catalysts’ morphology to hollow core@shell structures.
研究领域:
材料科学
·
催化化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2024
·
IF 5.8
Yuyin Dai,Qiuyu Lin,Qi Wang,Hongguang Zhao,Yinghua Li
Copper oxides (CuO), by virtue of their exceptional electrical conductivity, benign environmental profile, and economic viability, have emerged as indispensable constituents in the design and development of binder-free electrodes for advanced supercapacitor systems. The ongoing quest for the synthesis of CuO nanomaterials through gentle yet economically feasible methodologies held considerable promise for broadening their applicability within the domain of energy storage devices. In this investigation, a novel architectural innovation was achieved through the integration of carbon nanotubes (CNTs) within the framework of an in-situ electrooxidation process, culminating in the formation of a distinctive CuO-CNT nanorod configuration. Subsequent to this fabrication, the electrode material was subjected to an extensive cyclic voltammetry (CV) activation for 2000 cycles, which precipitated a profound morphological evolution. This process resulted in the emergence of 2D hierarchical nanosheet arrays enveloping 1D nanorods, a configuration herein designated as CuO-CNT-2000. This meticulously engineered lamellar structure conferred upon the material an extraordinary specific surface area, quantified at 219.6 m 2 g⁻ 1 , and an impressive specific capacitance of 709.1 F g⁻ 1 . Moreover, the asymmetric supercapacitor (ASC) assembled utilizing this advanced material exhibited a remarkable energy density, measured at 38.09 Wh kg⁻ 1 . Notably, even after enduring 60,000 charge-discharge cycles, the device demonstrated a retention of 82.36 % of its initial energy density, coupled with a Coulombic efficiency of 99.43 %, thus attesting to its superior electrochemical stability and longevity. The efficacy of the CV activation technique in facilitating significant morphological refinement, augmenting the specific surface area, and enhancing the electrochemical performance of the material suggests a broad applicability of this method to a diverse array of other electrode materials, potentially revolutionizing the design and fabrication of next-generation energy storage systems.
研究领域:
材料科学
·
能源存储技术
✓ 已验证
产品关联
DOI
高影响因子
MATERIALS CHEMISTRY AND PHYSICS
·
2017
·
IF 2.084
Yanjun Yin,Xueming Li,Yuanjie Shu,Xiaogang Guo,Hebin Bao,Wulin Li,Yuhua Zhu,Yu Li,Xinyue Huang
A novel porous Al/CuO nanothermite was successfully synthetized by utilizing the controllable electrophoretic deposition (EPD) method. The morphology and phase composition of the CuO and Al/CuO films were investigated in detail by field emission scanning electron microscopy (FESEM) and X-ray diffraction (XRD). When the pH of the solution was 2.0, the surface area of the Al/CuO film was able to reach 495.6 m 2 /g, which was much higher than that of films grown at pH 1.0, 3.0 or 4.0. Meanwhile, the combustion performance and energy outputs were coincident with the results mentioned above. At pH 2.0, bright flames were observed after ignition, and the released heat of the nanothermite reaction reached 3.49 kJ/g, exhibiting excellent combustion performance and enhanced energy output.
研究领域:
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
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.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
APPLIED SURFACE SCIENCE
·
2018
·
IF 4.439
Wei Li,Shu-ao He,Zi-ying Su,Wei Xu,Xue-chuan Wang
In this paper, the CuO nanoparticles (NPs) with narrow bandgap and near-infrared light response were chosen as the co-catalyst, and a series of BiOCl-CuO (BC-x, x = 1, 2 and 3) heterojunctions with superior visible light response and fast interfacial charge migration were synthesized by a facile one-pot solvothermal method. Then, the morphology, composition, crystal structure, photoelectronic properties and visible-light photocatalytic performance were studied in sequence. Research shows that the incorporation of CuO NPs can effectively enhance the photocatalytic performance of BiOCl semiconductor. For the moderate incorporation of CuO NPs, the p-n heterojunction interfaces can be fabricated between BiOCl and CuO components, so that the light response and interfacial charge migration ability can be effectively improved. Especially, when the content of incorporated CuO NPs was about 0.02 g, the BC-2 heterojunction exhibited the highest photocatalytic activity and very robust photostability in decomposing organic targeted pollutants (acid orange (AO) and bisphenol A (BPA)) and H 2 evolution reaction (HER) experiments under visible-light illumination.
研究领域:
材料科学
·
环境科学
✓ 已验证
DOI
高影响因子
JOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE
·
2020
·Vol. 29
·期 2
·1375-1383
·
IF 1.652
Yin Yanjun,Li Xueming
In this work, an Al/CuO energetic film with a porous hollow structure was obtained by electrophoretic deposition (EPD) from an aqueous solution at low field strengths of 20 V cm −2 instead of from organic solvents. CuO porous hollow microspheres (PHMSs) were prepared by a one-step hydrothermal method. The shape of the CuO PHMSs was very uniform at the macroscale with a size of 5 μm. To codeposit the species during the EPD process, the nano-Al particles and CuO PHMSs were modified with acrylic acid and citric acid, respectively. The nano-Al particles were deposited on the surface or in the interior of the CuO PHMSs by an electrical field and formed Al/CuO PHMS composites. The chemical composition, morphology, heat release and combustion of the as-prepared composite coating films were analyzed by XRD, FESEM, FT-IR, EDS, TG-DSC and with a high-speed camera. The heat release of the Al/CuO porous thermite reached 3804 J/g with excellent combustion performance due to the novel microstructure and appropriate modifications.
研究领域:
材料科学
·
化学工程
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）