SEPARATION AND PURIFICATION TECHNOLOGY
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2022
·
IF 9.136
Sisi Hu,Yanping Zhong,Jinghua Xu,Lingli Min,Xujun Liang,Rui Bai,Shuhua Wang
Waste printed circuit boards (PCBs), a common electronic waste, contain a high content of Cu. For environmental sustainability and economic benefit, it is necessary to recover the Cu as high value-added product instead of discarding it. In this work, Cu from PCBs was successfully recovered as CuO particles with high specific surface area and rich oxygen vacancies through cyclic leaching, chemical precipitation, low temperature aging, and calcination. Compared with CuO prepared from commercial Cu(NO 3 ) 2 ·5H 2 O, the PCBs-derived CuO (PCBs-CuO) exhibited comparable performance in activating peroxymonosulfate to degrade reactive blue 19, although its crystallinity and phase purity were relatively lower. Additionally, PCBs-CuO had an outstanding pH tolerance (2–12), confirming the practical application potential of PCBs-CuO in the removal of organic contaminants in various wastewater. Moreover, the quenching experiments, electrochemical measurements and electron paramagnetic resonance analysis suggested that 1 O 2 and ·OH played a significant role in PCBs-CuO/peroxymonosulfate system. The ≡Cu(II) and oxygen vacancies on the surface of PCBs-CuO was mainly responsible for the activation of peroxymonosulfate. This work provides a promising method for recycling metal from waste PCBs into high-effective peroxymonosulfate activator and simultaneously achieving environmental remediation.
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高影响因子
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
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2026
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IF 4.7
Huitian Zhi,Lingwei Bu,Ruhui Shang,Xujie Wang,Yingchao Yang,Wanyu Zhang,Zhengquan Yan,Lei Hu
Food health and safety is one of the hottest topics to affect human life nowadays. To reliably detect toxic S 2− and to normalize bioactive ascorbic acid (AA), a kind of tiny CuO/CeO 2 modified bovine serum albumin (CuO/CeO 2 @BSA) was prepared under microwave-assisted conditions. Not only did the modification of BSA to CuO/CeO 2 nanospheres endow CuO/CeO 2 @BSA with high stability and an average mesoporous pore of 3.88 nm, it exhibited outstanding oxidase-like activity to catalyze the oxidization of 3,3′,5,5′-tetramethyl benzidine (TMB) with V max / K m of 0.15 mM/5.96 × 10 −8 M·s −1 . The presence of trace S 2− or AA could exclusively deteriorate the characteristic UV–vis absorbance intensity at 652 nm ( A 652 ) of CuO/CeO 2 @BSA-TMB with obvious hypochromic effect from dark blue to light blue. Under the optimal oxidase-mimic conditions, CuO/CeO 2 @BSA-TMB was applied for potable UV–vis spectral/smartphones-assisted red-green-blue (RGB) monitoring of S 2− or AA in complex agricultural products with detection limits as low as 9.2 × 10 −9 /4.0 × 10 −8 M or 6.1 × 10 −8 /7.2 × 10 −8 M. The analysis accuracy was reliable from comparing their F and t values and the detection mechanisms were proposed. It will shed a potential for portable monitoring of analytes in food samples practically.
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MICROCHIMICA ACTA
·
2026
·Vol. 193
·期 3
·209
·
IF 5.4
Li Shaohui,Hao Sijia,Li Wen,Meng Ran,Wang Qiang,Wang Yuqing,Wang Lei,Liu Xinjing,Zhou Yuanyuan,Wang Haitong,Zhang Dongxia,Zhou Xibin
A ternary structure (CuO/CN/LDH) composed of LDH-anchored g-C 3 N 4 nanosheets loaded with CuO nanoparticles was successfully constructed via hydrothermal and co-precipitation methods, and a colorimetric sensing platform for hexavalent chromium (Cr(VI)) detection was proposed. The engineered nanomaterial demonstrates significantly enhanced oxidase-mimetic activity in the presence of Cr(VI), enabling rapid catalytic oxidation of 3,3’,5,5’-tetramethylbenzidine (TMB) with distinct chromogenic response. Mechanistic investigations reveal that Cr(VI) facilitates the conversion of dissolved oxygen into superoxide anions via redox cycling, thereby accelerating TMB oxidation. The sensor exhibits exceptional analytical performance with high accuracy (recoveries of 97.3-103.8%) and sensitivity (detection limit of 25 nM) in aqueous sample analysis. The sensor demonstrated excellent selectivity against common interfering metal ions, as well as high stability (still above 95% for 8 weeks). Notably, an innovative paper-based analytical device was developed in conjunction with smartphone-assisted colorimetric detection, achieving on-site visual quantification of Cr(VI) within 15 min. This integrated system provides a field-deployable solution for environmental monitoring, combining operational simplicity with reliable detection capabilities. This study addresses the main limitations of Cr(VI) sensors, such as their dependence on complex instruments and poor stability of natural enzymes, and demonstrates low detection limits, excellent selectivity, and long-term stability. In addition, the proposed methodology advances current sensing technologies by merging nanomaterial engineering with portable detection platforms, demonstrating significant potential for heavy metal surveillance in water quality management. Based on this, this study also constructed a paper-based colorimetric detection sensor.
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JOURNAL OF ALLOYS AND COMPOUNDS
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2022
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IF 6.371
Sixing Dai,Yue Wang,Lei Xiao,Gazi Hao,Yubing Hu,Guangpu Zhang,Wei Jiang
Limit caused by insufficient charge transfer between interfaces is one of the current topics in the photocatalytic degradation of pharmaceuticals and personal care products (PPCPs). Photocatalysts designed as 2D/2D/2D structures have a faster separation rate of the heterojunction interface and a better carrier transfer speed to improve their performance. In this work, 2D CuO nanosheets have been synthesized by the drip method at normal temperature. And layered MXenes are introduced as the charge transfer bridges into the system of O-doped g-C 3 N 4 nanosheets and CuO nanosheets to construct a 2D/2D/2D CuO-MXene-OCN S-scheme heterojunction. The photocatalytic performance of CuO-MXene-OCN is much higher than CuO-OCN heterojunction due to the intimate interaction between interfaces. The degradation efficiencies of different PPCPs in 60 min under visible light irradiation are 98.2 % for TC, 75.6 % for MT, 92.6 % for DCF. This unique interfacial engineering gives new insight into the construction of layered S-scheme heterojunctions with 2D/2D/2D structure for photocatalytic degradation of PPCPs.
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MICROCHIMICA ACTA
·
2022
·Vol. 189
·期 4
·1-12
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IF 6.408
Zheng Delun,Yang Jianying,Zheng Zengyao,Peng Mingxuan,Ng Kwan-Ming,Chen Yaowen,Huang Linjia,Gao Wenhua
A metal–organic framework (MOF) of Cu-TPA (terephthalic acid) microsphere was prepared, followed by calcinating the MOF precursor of Cu-TPA/ZIF-8 mixture to obtain the CuO/ZnO. N-doped carbon dots (NCDs) were employed to combine the CuO/ZnO composite to form a tripartite heterostructured architecture of NCDs@CuO/ZnO, which led to a fierce enlargement of the photocurrent response. This was ascribed to the thinner-shell structure of the CuO microsphere and the fact that hollow ZnO particles could sharply promote the incidence intensity of visible light. The more porous defectiveness exposed on CuO/ZnO surface was in favor of rapidly infiltrating electrolyte ions. The p-n type CuO/ZnO composite with more contact interface could abridge the transfer distance of photo-induced electron (e −1 )/hole (h + ) pairs and repress their recombination availably. NCDs not only could boost electron transfer rate on the electrode interface but also successfully sensitized the CuO/ZnO composite, which resulted in high conversion efficiency of photon-to-electron. The probe DNA (S1) was firmly assembled on the modified ITO electrode surface (S1/NCDs@CuO/ZnO) through an amidation reaction. Under optimal conditions, the prepared DNA biosensor displayed a wide linear range of 1.0 × 10 −6 ~ 7.5 × 10 −1 nM and a low limit of detection (LOD) of 1.81 × 10 −7 nM for colitoxin DNA (S2) measure, which exhibited a better photoelectrochemistry (PEC) analysis performance than that obtained by differential pulse voltammetry techniques. The relative standard deviation (RSD) of the sensing platform for target DNA detection of 5.0 × 10 −2 nM was 6.3%. This proposed DNA biosensor also showed good selectivity, stability, and reproducibility, demonstrating that the well-designed and synthesized photoactive materials of NCDs@CuO/ZnO are promising candidates for PEC analysis. Graphical abstract
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PubMed
高影响因子
CERAMICS INTERNATIONAL
·
2021
·
IF 4.527
Qingming Meng,Wenna Liu,Juan Jiang,Xinle Zhang
CuO/ZnO p-n heterojunction nanofibers were fabricated by coupling p-type CuO with n-type ZnO nanofibers for efficacious elimination of pyridine in fuel oil. The structural and photoelectric characteristics of the as-synthesized nanofibers were systematically studied. The photodegradation system was appropriate for the oxidation of pyridine from fuel oil utilizing the ambient air without mixing with other oxidants. Under visible light illumination, more than 90% of the pyridine (100 mL, 100 μg/g) could be degraded within 60 min by 17.5 mg of MCuZn-0.5 (the photocatalyst with a Cu/Zn molar ratio of 0.5 at%). The visible-light-induced photocatalytic denitrification efficiency of the MCuZn-0.5 nanofibers was nearly 1.5 times as high as that of ZnO alone. The superior denitrification activity of p-CuO/n-ZnO heterojunction nanofibers could be attributed to the enhanced optical absorption capacity and efficacious separation of photoexcited charge pairs. In addition, five-cycle experiments confirmed that MCuZn-0.5 nanofibers also displayed satisfactory photocatalytic denitrification properties. Mechanistic investigations proposed that the photoexcited holes played a dominant role in the formation of reactant intermediates, while superoxide radicals promoted the ultimate mineralization process of pyridine.
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SENSORS AND ACTUATORS B-CHEMICAL
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2021
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IF 7.46
Weijia Li,Lingchu Huang,Tong Wang,Xidong Hao,Bin Wang,Qi Lu,Xishuang Liang,Fengmin Liu,Fangmeng Liu,Chenguang Wang,Geyu Lu
The development of high-performance gas sensors for detecting trace amount of CH 3 OH is an essential and a challenging task for safety using fuel cell vehicles (FCVs). In this work, the metal oxides (SnO 2 , In 2 O 3 , CuO) are employed as the catalyst carrier materials in fuel cell type sensors for the first time to replace traditional carbon, with which the Pt/MO x based fuel cell type sensors are fabricated. Among them, Pt/SnO 2 based sensor displays the lowest detection limit because SnO 2 carrier can not only support Pt particles but also provide an appropriate number of electrons for Pt, which is beneficial to reduce the adsorption strength of the intermediates and then improves the catalytic ability. The detection limit is as low as 0.5 ppm, the lowest of the various types of CH 3 OH sensors that work at room temperature. Moreover, the Pt/SnO 2 based fuel cell type sensor displays the characters of high selectivity, good repeatability and robust moisture resistance. To the best of our knowledge, this is the first report employing MO x as the catalyst carrier materials in fuel cell type sensors.
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CHEMICAL ENGINEERING JOURNAL
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2020
·
IF 10.652
Min Wang,Chongyue Jin,Jin Kang,Jiayun Liu,Yiwu Tang,Zhilin Li,Siyan Li
In the current work, a CuO/g-C 3 N 4 (Cu/CN) 2D/2D heterojunction photocatalyst was precisely designed to degrade oxytetracycline (OTC) by activating peroxymonosulfate (PMS) under visible light irradiation. The as-fabricated catalysts were explored in detail on the base of the characterization results. The optimum 5Cu/CN can degrade almost 100% of oxytetracycline (OTC) by activating PMS under visible light in 10 min, and also displays high degradation efficiency toward tetracycline (TC), ciprofloxacin (CIP), levofloxacin (LVX) and sulfadiazine (SDZ). Additionally, the effect of experimental conditions on OTC degradation was investigated, and the stability of the catalysts was evaluated. The electron spin resonance (ESR) and quenching results verified the generation of multiple reactive oxygen species (ROS), and the size of their roles in OTC degradation followed the sequence •OH & SO 4 •− > 1 O 2 > h + > •O 2 − . The possible mechanism of higher OTC degradation efficiency in the 5CuO/CN/PMS/Vis system and the OTC degradation pathway were deeply explored. This work supplies a worthy reference for developing an efficient g-C 3 N 4 -based photocatalytic technology for rapid and efficient antibiotic elimination from the environment.
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JOURNAL OF POWER SOURCES
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2020
·
IF 8.247
Guichao Liu,Xue-Zhi Song,Shenpeng Zhang,Xi Chen,Sihang Liu,Yulan Meng,Zhenquan Tan
Rational architecture design and ingenious electrochemical performance optimization are highly desirable in developing high-performance asymmetric supercapacitors . Herein, a facile electrodeposition strategy is adopted to construct the hierarchical core-shell architecture of binary transitional metal hydroxide nanosheets anchored on copper foam ( CF) supported three-dimensional (3D) CuO scaffolds. The synergistic contributions from different electro-active components are maximized by the heterostructures construction and components optimization. As a result, the 3D binder-free electrode of CF supported CuO@Zn 1 Co 2 -OH core-shell heterostructure achieve a high areal capacitance of 2.634 F cm −2 at 5 mA cm −2 , enhanced rate performance (71.6% retention at 30 mA cm −2 ), and long durability (99.1% after 4000 cycles). Additionally, a CuO@Zn 1 Co 2 –OH//LSDC (loofah sponge derived carbon) asymmetric supercapacitor (ASC) is assembled with an operating voltage of 1.5 V. The ASC device delivers a maximum energy density of 0.21 mW h cm −2 (22.10 W h kg −1 ) at a power density of 4.08 mW cm −2 (434 W kg −1 ), and exceptional cycling stability (91.7% of capacitance retention after 4000 cycles). Of practical importance, this work broadens our horizons in fabricating novel hierarchical core-shell heterostructures for next-generation electrochemical energy-storage technologies.
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DALTON TRANSACTIONS
·
2020
·Vol. 49
·期 27
·9274-9281
·
IF 4.174
He Li,Yu Zou,Jiang Jiang
Ag and CuO in the form of nanoparticles have been widely used in our daily life as antibacterial agents, through releasing Ag ions and generating reactive oxygen species (ROS). In this work, we demonstrate that by synthesizing Ag@CuO nanohybrids with core–shell configurations, their bactericidal activity can be synergistically enhanced compared to the respective constituents. Upon AM 1.5G light illumination for short durations, the measured minimum inhibitory concentrations of the Ag@CuO nanohybrids show a significant decrease against both Gram-negative Escherichia coli and Gram-positive Staphylococcus aureus bacterial strains, requiring only 7% and 34% of those when conducted in the dark. The spread plate results demonstrate that with nanohybrid concentrations of 11.0 and 21.9 mg L−1, at least 7 orders of magnitude decrease in Escherichia coli and Staphylococcus aureus colony forming units is achieved, when the Ag@CuO nanohybrids are exposed to light illumination for 10 min. The effect of illumination is found to induce Ag+ release and enhance 1O2 generation, which act concertedly to facilitate the remarkable photo-enhanced bactericidal effect.
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高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2020
·
IF 3.573
Yajie Chen,Siyuan Xia,Wei Ren,Zilong Zheng,Junhong Chen,Kefeng Ma,Chunpei Yu,Xinli Zhou,Wenchao Zhang
In this paper, sheet-like porous CuO (p-CuO), which was prepared using a hydrothermal-annealing method, has been first selected as an oxidizer to prepare n-Al/p-CuO/GO nanoenergetic composites. The n-Al/p-CuO/GO nanoenergetic materials were fabricated by means of vacuum-assisted self-assembly. Moreover, the effect from the quantity of added GO was studied on the morphology and reaction performance of the n-Al/p-CuO/GO nanoenergetic composites. The characterizations show that the resulting n-Al/p-CuO/GO composites have a uniform distribution of reaction components for an improved reactivity. The total heat release of the composite energetic material gradually rises up to 2306.7 J/g with the increasing GO content till 5 wt % but decreases as the GO content continues going up. Most importantly, the maximum value of the reaction exothermic heat is approximately 2.2 times higher in value than that of the as-prepared composite without GO addition. It is found out that the n-Al/p-CuO/GO nanothermite with 5 wt % GO can be successfully ignited by a semiconductor bridge at a 1 A current to produce a big and bright flame, thus indicating that its combustion performance is excellent. Therefore, the new nanoenergetic composites from a combination of GO and n-Al/p-CuO have a bright application prospect in the field of energetic materials.
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MICROPOROUS AND MESOPOROUS MATERIALS
·
2019
·
IF 4.182
Yue Pan,Songshan Jiang,Wei Xiong,Derong Liu,Min Li,Bai He,Xiaolei Fan,Dong Luo
A novel heterogeneous Fenton catalyst of Cu-UiO-66 metal-organic framework (MOF) was developed for catalytic wet peroxide oxidation (CWPO) of wastewater containing the concentrated 4-chlorophenol. Cu-UiO-66 was characterized comprehensively using XRD , N 2 adsorption-desorption, SEM-EDS, TEM , H 2 -TPR and XPS analysis to reveal its physical and chemical properties. Specifically, XPS results indicated the interaction of Cu species with framework Zr element, and H 2 -TPR further proved the existence of CuO active component and thermal stability of the synthesized catalysts. The Cu-UiO-66 catalysts exhibited excellent catalytic activity in the CWPO of 4-chlorophenol wastewater (1,000 to 5,000 mg/L) with conversions of 98% achieved in 20 min and complete degradation in 40 min. Based on the detailed HPLC analysis of the reaction media, mechanistic study of the CWPO of 4-chlorophenol was performed.
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危险品化学品经营许可证（带存储）