EUROPEAN JOURNAL OF INORGANIC CHEMISTRY
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2023
·Vol. 26
·期 11
·e202200640
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IF 2.3
Chen Wang,Nan Gao,Zhaoqing Gao,Ruofan Li,Yunpeng Wang,Weitao Gong
Graphical CuO/Cu glucose catalytic electrode is fabricated by copper anodization which can construct nanostructure in situ on copper substrates and regulate the chemical composition and morphology of the anodized films. The anodized CuO/Cu sample can be used as catalytic electrode directly and presents a high catalytic performance towards glucose oxidation. Potentiostatic anodization was developed to synthesize copper oxide/copper (Cu x O/Cu, x=1,2) electrode with nano structure for sensitive non-enzymatic glucose detection. At a catalytic potential of 0.55 V, the CuO/Cu electrode presented a high sensitivity of 2954.38 μA mM −1 cm −2 to glucose and a linear range of 0.1 mM to 1.3 mM. The response time is less than 3 s with addition of 0.1 mM glucose. The CuO/Cu electrode above was anodized in 1M KOH solution at −100 mV and the morphology was compact nanoparticles and sparsely dispersed nanosheets, which enlarged the surface area and provided abundant electrocatalytic active sites. Compared the sensing property of electrodes with different morphologies, it indicated that nanostructure was significant to the efficient glucose catalytic oxidation process and it could be regulated by changing the potential and electrolyte concentration during anodization.
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JOURNAL OF CHEMICAL TECHNOLOGY AND BIOTECHNOLOGY
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2022
·Vol. 97
·期 7
·1900-1908
·
IF 3.709
Yanjie Wu,Huiping Zhang,Ying Yan
BACKGROUND Cu-ZSM-5 was prepared on paper-like sintered stainless steel fibers (PSSF) by ion-exchange method for the catalytic wet peroxide oxidation (CWPO) of phenol in a fixed bed reactor. The prepared Cu-ZSM-5/PSSF catalyst was characterized by scanning electron microscope (SEM), Brunner−Emmet−Teller (BET), X-ray diffraction (XRD), Fourier Transform InfraRed (FT-IR), Ultraviolet–visiblespectroscopy (UV–vis) and X-ray photoelectron spectroscopy (XPS). RESULTS The XRD results showed that the ZSM-5 membrane was loaded well over PSSF with good crystallinity, even after the process of ion-exchange. The UV–vis inferred that isolated copper was the predominant species over ZSM-5 pores of the catalyst. Then, the effects of different catalyst bed heights, reaction temperatures, and feed flow rates on catalytic performance were investigated to obtain optimum reaction conditions. CONCLUSIONS Finally, the catalytic reaction kinetics analysis over Cu-ZSM-5/PSSF catalyst were carried out with the Power-rate Law Kinetic model. The experimental results showed that the reaction order was the first-order reaction, and the activation energy of the oxidation reaction was Ea = 72.9 kJ/mol. The initial oxidation rate equation (−r A0 = 5.36 × 10 8 e −72 994/RT C A ) was obtained for phenol degradation using Cu-ZSM-5/PSSF catalyst. © 2022 Society of Chemical Industry (SCI).
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COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
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2022
·
IF 9.463
Mulan Cui,Xiaowei Mu,Wei Cai,Xuan Wang,Daolin Ye,Jianchao Xi,Yuan Hu,Weiyi Xing
To enhance the flame retardancy and smoke suppression effects of epoxy resin (EP), three inorganic compounds of copper modified covalent organic frameworks (COFs), COFs@CuO, COFs@Cu 2 O, COFs@Cu(OH) 2 are synthesized. The flame retardancy of EP can be significantly uprated by adding only 2 wt% COFs@Cu 2 O. The PHRR and THR yield of EP/COFs@Cu 2 O decrease by 36.6% and 20.4% compared with that of unmixed EP, respectively. The smoke density of EP/COFs@CuO reduces by 54.3% compared with that of pure epoxy. Moreover, the peak CO yield (COPR) of EP/COFs@Cu 2 O nanocomposites is 42.8% lower than that of unmixed EP. In addition, the impulse strength of EP/COFs@CuO augment 50.7% than that of pure epoxy, and the tensile strength of EP/COFs@CuO is 80.0% higher than that of EP/COFs. The synergy between metallic inorganic compounds and COFs is investigated. This work proves a guidance for preparation of high safety EP.
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JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS
·
2022
·
IF 4.383
Bing Xiao,Minghao Xu,Bin Lu,Yun Wang,Hui Liu,Rufen Chen
Economical elimination of organic pollutants from waste water has be paid more attention owing to its environmental and ecological significance. In this study, an easily achievable process to in-situ fabricate copper and co-modified Z-scheme BiOCl/Bi 2 O 3 heterojunction was proposed. The study on the formation mechanism indicated that the introduction of copper ions is favorable for the formation of Bi-based catalyst with flaky morphology while the addition C-dots makes the nanosheets loosely be packed and intercrossed each other. The composite exhibited a high degradation efficiency for Bisphenol A (BPA) and 91% of BPA was removal within 35 min under xenon lamp irradiation. The excellent photocatalytic performance was attributed to the synergistic effect of the in-situ formation Z-scheme BiOCl/β-Bi 2 O 3 heterojunction, multiple charge transfer channels including Cu 2+ /Cu + and C-dots, and efficient charge separation. The electron paramagnetic resonance (EPR) analysis and quenching tests revealed that O 2 •− play a main role in degradation of BPA. Based on the experimental results, the photo-catalytic mechanism is proposed and the degradation path of BPA is revealed.
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NANO
·
2022
·
IF 1.438
Bo Tang,Ke Liu,Jiayuan Liu,Zhengwei Wang
Volatile organic compounds (VOCs) are the one kind of pollution, which lead to the severe atmospheric contamination problem. Metal organic frameworks (MOFs) and graphene are promising candidates to collect VOCs. In this study, composites which consist of graphene sheets and Cu-BTC (benzene-1,3,5 tricarboxylic acid) are prepared by the hydrothermal method to adsorb VOCs and CO. Moreover, the morphology of the resulting graphene material in the composites can be controlled by adjusting the pH value, reaction time and surfactant during the hydrothermal process, which further determines the adsorption ability for different gas molecules. According to the pore distribution features of various composites, the morphology of graphene exerts a fatal influence on the observed adsorption performances. Furthermore, the polarity of the as-prepared composites is another important determinant to selective adsorption for various VOCs. The stability of these composites under high temperature is also tested, and the results demonstrate that the adsorbents can be used in a wide temperature range. Moreover, the large BET areas and high stability of the composites in the water endow them a potential application in the sewage clarification field. After the corresponding optimization, the adsorption amounts of methanol and ethanol reach 13.6 mmol g − 1 and 9.68 mmol g − 1 , respectively.
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BIOMATERIALS
·
2022
·
IF 15.304
Jie Chen,Xiaomin Tan,Yanjuan Huang,Congjun Xu,Zishan Zeng,Ting Shan,Zilin Guan,Xiaoyu Xu,Zeqian Huang,Chunshun Zhao
Disulfiram (DSF), an effective FDA-approved anti-alcoholism drug, shows potent antitumor activity by producing Cu(DTC) 2 , a chelate of its metabolite diethyldithiocarbamate (DTC) and copper. However, the rapid metabolism and unselective distribution of DSF and the insufficient endogenous copper severely restrict enough bioactive Cu(DTC) 2 generation in tumor tissues to achieve satisfactory antitumor effect. Moreover, directly Cu(DTC) 2 administration also suffers from serious systemic toxicity. Herein, a reactive oxygen species (ROS)-activatable self-amplifying prodrug nanoagent (HA-DQ@MOF) was developed for the stable co-delivery of DTC prodrug and Cu-quenched photosensitizer , aiming to achieve tumor-specific dual-activation of highly-toxic Cu(DTC) 2 -mediated chemotherapy and cascaded photodynamic therapy (PDT). The ROS-cleavable hyaluronic acid-conjugated DTC prodrug (HA-DQ) was decorated on Cu 2+ and photosensitizer Zn-TCPP coordinated MOF (PDT-shielded state) to construct HA-DQ@MOF. HA-DQ@MOF could specifically activated in ROS-overexpressed tumor cells to rapidly release DTC, while remaining relatively stable in normal cells. The free DTC immediately grabbed Cu 2+ from MOF to in situ generate highly-cytotoxic Cu(DTC) 2 chelate, accompanied by MOF dissociation to restore the PDT effect of Zn-TCPP. Importantly, ROS produced by PDT could in turn trigger more DTC release, which further promoted Zn-TCPP liberation, forming a self-amplifying prodrug/photosensitizer activation positive feedback loop . Experimental results confirmed the dual-activated and combined tumor-killing effect of Cu(DTC) 2 -mediated chemotherapy and Zn-TCPP-based PDT with little systemic toxicity. This work provides a dual-activated “low toxic-to-toxic” transformable treatment pattern for tumor-specific chemo-photodynamic therapy.
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PubMed
高影响因子
ACS Applied Materials & Interfaces
·
2022
·
IF 10.383
Junji Guo,Xungang Diao,Mei Wang,Zhi-Bin Zhang,Yizhu Xie
Electrochromic devices with unique advantages of electrical/optical bistability are highly desired for energy-saving and information storage applications. Here, we put forward a self-driven Al-ion electrochromic system, which utilizes WOx films, Cu foil, and graphite rod as electrochromic optical modulation and graph display electrodes, coloration potential supplying electrodes, and bleaching potential supplying electrodes, respectively. The inactive Cu electrode can not only realize the effective Al3+ cation intercalation into electrochromic WOx electrodes but also eliminate the problem of metal anode consumption. The electrochromic WOx electrodes cycled in Al3+ aqueous media exhibit a wide potential window (∼1.5 V), high coloration efficiency (36.0 cm2/C), and super-long-term cycle stability (>2000 cycles). The dynamic optical modulation and static graph display function can be achieved independently only by switching the electrode connection mode, thus bringing more features to this electrochromic system. For a large-area electrochromic system (10 × 10 cm2), the absolute transmittance value in its color-neutral state can reach about 41% (27%) at 633 nm (780 nm) by connecting the Cu and WOx electrodes for 140 s. The original transparent state can be readily recovered by replacing the Cu foil with the graphite rod. This work throws light on next-generation electrochromic applications for optical/thermal modulation, privacy protection, and information display.
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SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
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2022
·
IF 4.831
Fei Qu,Yue Wang,Dafeng Jiang,Xian-en Zhao
The Metallacrowns (MCs) composed of repeated [Metal-N-O] subunits are a type of new material, but the MCs have not been developed and utilized in analytical applications. This essay reports on a new kind of terbium(III)-based Metallacrowns (Tb-MCs) with aggregation-induced emission (AIE) feature to build a sensing platform. It is first time that Tb-MCs are able to aggregate to larger aggregates in water along with a bright green emission, so that the property makes it possible to apply in biosensing. Thereafter, the AIE of Tb-MCs can be quenched effectively by Cu 2+ . Based on the high affinity of thiol to Cu 2+ , cysteine (Cys) recovers the fluorescence of Tb-MCs in the presence of Cu 2+ . There is a good linear range varying from 0.02 to 20 μM with a low limit of detection (LOD) 9.67 nM of Cys. In the end, this novel probe is also successfully applied to the determination of Cys in human serum with satisfactory results.
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SOLAR ENERGY
·
2022
·
IF 7.188
Shuang'an Liu,Senyang Wang,Ying Cao,Chengyang Liang,Shitong Geng,Haipeng Guo,Ying Liu,Wenming Zhang,Ling Li
The catalytic enhancement of counter electrode materials is of an essential move for the overall evolution of QDSSCs. While the commonly used Cu 2 S/Cu counter electrode is easy to be eroded off by sulfur electrolyte, resulting in photoanode pollution. Herein, rough polyhedron Cu/Co@NCF composite is smoothly prepared via hydrothermal and synchronous doping method to replace Cu 2 S/Cu application. With the ZIF-67 as carbon source and morphology support, Cu and Co nanoparticles (NPs) are uniformly embedded in the carbon polyhedron without agglomeration, while the doping of nitrogen makes the composites have better porous structure. Combining the superior catalytic from Cu and Co particles with the electrical conductivity and stability from the carbon frame, the Cu/Co@NCF composite as QDSSCs counter electrode achieves an excellent photoelectric conversion effect (6.66%), close to that of Cu 2 S/Cu (7.29%). With stable and excellent counter electrode performance, Cu/Co@NCF composite unquestionably has the potential to be an alternative material for the CE application of QDSSCs.
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Nanomaterials
·
2022
·Vol. 12
·期 7
·1063
·
IF 5.719
Guannan Yang,Shaogen Luo,Tao Lai,Haiqi Lai,Bo Luo,Zebo Li,Yu Zhang,Chengqiang Cui
In this work, we developed an eco-friendly and facile microvia filling method by using printing and sintering of Cu-Ag core-shell nano-microparticles (Cu@Ag NMPs). Through a chemical reduction reaction in a modified silver ammonia solution with L-His complexing agent, Cu@Ag NMPs with compact and uniform Ag shells, excellent sphericity and oxidation resistance were synthesized. The as-synthesized Cu@Ag NMPs show superior microvia filling properties to Cu nanoparticles (NPs), Ag NPs, and Cu NMPs. By developing a dense refill method, the porosity of the sintered particles within the microvias was significantly reduced from ~30% to ~10%, and the electrical conductivity is increased about twenty-fold. Combing the Cu@Ag NMPs and the dense refill method, the microvias could obtain resistivities as low as 7.0 and 6.3 μΩ·cm under the sintering temperatures of 220 °C and 260 °C, respectively. The material and method in this study possess great potentials in advanced electronic applications.Keywords:Cu-Ag core-shell nano-microparticles;microvias;vertical interconnection;blind hole filling;sintering
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Journal of Environmental Chemical Engineering
·
2022
·
IF 7.968
Wenjun Zhu,Sylvestre Ndayiragije,Xiaohua Zuo,Xiaofei Zhang,Guanghui Wang,Xiaobo Wang
Single-atom Cu and N co-coordinated porous carbon (Cu-N-C) was synthesized by hydrothermal-calcination using zinc zeolite imidazole frameworks (ZIF-8) as the precursor. The catalyst showed excellent adsorption and catalytic ability due to the ideally-dispersed single atomic copper sites and the unique nitrogen-doped porous carbon. The complete removal of sulfamethoxazole (SMX, 18 mg/L) could be achieved within 40 min of pre-adsorption and 25 min of oxidative degradation in the present of peroxymonosulfate (PMS). The adsorption capacity of Cu-N-C (0.2 g/L) was evaluated to be 58.69 mg/g. The apparent degradation rate constant ( k ) of SMX on Cu-N-C was 0.155 min -1 , which was 14.1 times faster than that on N-C (0.011 min -1 ). From the activation mechanism, it was found that CuN units acted as the main active sites in Cu-N-C for PMS activation . EPR analysis and quenching experiments verified that the reactive oxygen species (ROSs) of SO 4 · - and 1 O 2 were involved in the decomposition and mineralization of SMX. This work provides a new perspective for the development of Fenton-like single-atom catalysts.
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SEPARATION AND PURIFICATION TECHNOLOGY
·
2022
·
IF 9.136
Chuankun Yin,Aimal Khan,Qiaohui Gao,Quan Li,Xiaoyun Zhou,Xiuying Liu,Aihua Xu,Xiaoxia Li
Recently, the development of efficient mixed metal oxide catalysts for organic pollutants degradation via peroxymonosulfate (PMS) activation is a hot topic in the area of wastewater treatment . In this work, the silver-copper mixed-oxide, Ag 2 Cu 2 O 3 (ACO) was reported for the first time as a highly active catalyst for removing organic pollutants in the presence of PMS. ACO was successfully synthesized from Ag + and Cu 2+ ions at 60 °C, and its structure was strongly influenced by the temperature. The catalyst could almost completely remove p -nitrophenol and other pollutants with 0.65 mM PMS after 20 min, and also exhibited satisfactory stability and recyclability. The system efficiency was shown to vary with the concentration of PMS and catalyst, as well as solution pH. Scavenger experiment and EPR analysis indicated that radicals produced by the oxidation of Ag(I) and Cu(I) with PMS could promote degradation reaction. The synergistic effect between Cu and Ag in the bimetallic catalyst was demonstrated to contribute to the high performance: Cu(II)-O-Ag(I) bonds promote the conversion of Cu(II) species to Cu(I) through reaction with PMS, and facilitate the oxidation of Cu(I) and Ag(I) by PMS to generate active radicals. The study provides a feasible strategy to design efficient and stable bimetal oxide catalysts for PMS activation.
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