SENSORS AND ACTUATORS B-CHEMICAL
·
2025
·
IF 7.7
Linling Zhong,Fanpeng Gong,Jing Li,Guizhu Liu,Xin Wen,Fan Yu,Changjun Hou,Sen Yang,Fangyong Zhu,Xianfeng Wang
High-performance detection of cTnI possesses great significance for diagnosis of myocardial infarction. In this work, two kinds of lower-dimensional Cu(II)-loaded polydopamines were synthesized via in-situ polymerization of dopamine for the first time using Cu-pBDC MOFs and Cu-aBDC MOFs as templates. The obtained Cu-ppDA nanosheets and Cu-apDA nanoribbons maintain the original structure of MOFs and exhibit the advantages of large specific surface area and metal coordination effect, which efficiently enhances the adsorption of single-stranded aptamer DNA probe via π–π stacking. Energy transfer from FAM-Apt probe to Cu(II)-loaded pDA occurred, resulting in the fluoresce quenching. The inference of target cTnI assembles with FAM-Apt probe and the releases from FAM-Apt/Cu-ppDA or FAM-Apt/Cu-apDA systems, leading to the fluorescence recovery. This approach enables a simple, rapid, sensitive, and specific detection method for cTnI. By contrast, FAM-Apt/Cu-ppDA system shows a lower LOD than that of FAM-Apt/Cu-apDA. Furthermore, the successful implementation of these two fluorescent sensors for the detection of cTnI in serum samples obtained from mice with myocardial infarction has been demonstrated. The outcomes of this detection aligned with those achieved through the ELISA method, suggesting their promising potential for practical application in early screening for myocardial infarction.
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高影响因子
Journal of Environmental Chemical Engineering
·
2024
·
IF 7.4
Xueqian Wu,Jin Zhao,Jiangyan Tao,Jiawen Chi,Xin Min,Songjian Zhao
As a major greenhouse gas, the rational conversion and utilization of CO 2 can help reduce carbon emissions and mitigate the greenhouse effect. In this study, mesoporous SiO 2 as a carrier, with CuO and NiO employed to construct a binary metal composite silica-based catalyst, coupled with dielectric barrier discharge (DBD) plasma, for the conversion of CO 2 . Physicochemical analysis confirmed the successful introduction of CuO into the mesoporous SiO 2 . NiO and CuO bimetals were dispersed on SiO 2 surfaces with large specific surface areas, ensuring an optimal distribution of metal oxide. Gas chromatography was utilized to investigate the performance of DBD-coupled x%CuO-3 %NiO/Si for CO 2 conversion. The results indicated that the CuO-NiO binary composite silica catalysts significantly improved CO 2 conversion, CO yield, and energy efficiency compared to the monometallic 3 %NiO/Si materials. Further microstructural analysis of the 9 %CuO-3 %NiO/Si catalyst revealed near-elliptic particles with dimensions of 200 by 500 nm and a large number of irregular fine particles attached to the surface. When the CuO loading reached an optimal level and the input power was set at 30 W, the energy efficiency of the 9 %CuO-3 %NiO/Si catalyst increased by 119.6 %. The CuO-NiO binary composite Si-based catalyst developed in this study boasts simple operation and environmental friendliness, making it highly significant for CO 2 treatment.
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APPLIED CATALYSIS A-GENERAL
·
2025
·
IF 4.8
Zheng Cui,Yueli Wen,Bin Wang,Maohong Fan,Faraz Ahmad,Hui Bai,Wei Huang
Activation of hydrogen atoms of methyl in toluene and methanol is crucial for side-chain alkylation of toluene with methanol. Herein, two strategies were applied, introducing dehydrogenation component (Cu) and tailoring the catalyst acid-base property with NaOH. A series of Cu and NaOH dual-modified PAl-NaX catalysts were prepared by in-situ hydrothermal method, the synergistic effect of Cu and NaOH was investigated. It is revealed that the product of (medium base)* (weak acid) and surface Cu δ+ percentage is crucial in controlling the total yield of side chain alkylation products by enhancing ethyl benzene selectivity. Cat-3Cu-13Na exhibits the optimal catalytic performance with an average methanol conversion of 97.25 % and an average total yield of side chain alkylation products of 77.46 % without obvious deactivation occurs in 192 h, and Cat-3Cu-19Na shows a promising styrene selectivity of 44.06 %. The decrease of weak acid sites might result in the decline in selectivity of styrene.
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Small
·
2024
·
IF 13
Yi-Ran Du,Xiao-Qiang Li,Xian-Xia Yang,Guo-Yi Duan,Yong-Mei Chen,Bao-Hua Xu
In this study, the copper-nickel (Cu–Ni) bimetallic electrocatalysts for electrochemical CO 2 reduction reaction(CO 2 RR) are fabricated by taking the finely designed poly(ionic liquids) (PIL) containing abundant Salen and imidazolium chelating sites as the surficial layer, wherein Cu–Ni, PIL–Cu and PIL–Ni interaction can be readily regulated by different synthetic scheme. As a proof of concept, Cu@Salen-PIL@Ni(NO 3 ) 2 and Cu@Salen-PIL(Ni) hybrids differ significantly in the types and distribution of Ni species and Cu species at the surface, thereby delivering distinct Cu–Ni cooperation fashion for the CO 2 RR. Remarkably, Cu@Salen-PIL@Ni(NO 3 ) 2 provides a C2+ faradaic efficiency (FE C2+ ) of 80.9% with partial current density ( j C 2+ ) of 262.9 mA cm −2 at −0.80 V (versus reversible hydrogen electrode, RHE) in 1 m KOH in a flow cell, while Cu@Salen-PIL(Ni) delivers the optimal FE C2+ of 63.8% at j C2+ of 146.7 mA cm −2 at −0.78 V. Mechanistic studies indicates that the presence of Cu–Ni interfaces in Cu@Salen-PIL@Ni(NO 3 ) 2 accounts for the preserve of high-valence Cu(I) species under CO 2 RR conditions. It results in a high activity of both CO 2 -to-CO conversion and C–C coupling while inhibition of the competitive HER.
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PubMed
高影响因子
LANGMUIR
·
2025
·
IF 3.9
Caiwen Pan,Qinghong Shi,Xiaoyan Dong,Linling Yu,Yan Sun
Effective degradation and detoxification of the highly toxic organophosphate pesticide methyl parathion (MP) are important for pollution treatment and sustainable development. Enzymatic hydrolysis of MP by organophosphate hydrolase (OPH) is an effective way. However, hydrolytic product 4-nitrophenol (4-NP) remains environmentally hazardous. A promising strategy is to reduce 4-NP to 4-aminophenol (4-AP), which not only is weakly toxic but also has high application value. To realize the cascade conversion of MP to 4-AP with the dual objectives of detoxification and recycling, we designed a chemoenzymatic catalyst by immobilizing the OPH within a reduction-catalytic nanocomposite (NCu) constructed by generating copper nanoparticles (Cu NPs) in a zirconium-based metal–organic framework, NU-1000. Optimized OPH@NCu exhibited a 239% enhancement in catalytic activity compared to free OPH, attributed to substrate enrichment by NCu and activation of OPH by Cu2+. Moreover, OPH@NCu exhibited an average cascade conversion rate of 11.1 μmol min–1 gcatalyst–1, achieving a complete conversion of 50 μM MP to 4-AP within 9 min by using a low reductant concentration (15 mM NaBH4). Notably, OPH@NCu demonstrated robust stability, retaining >86% of its activity after being stored for 10 days and nearly 80% of its activity over six reuse cycles. These results validate OPH@NCu as an efficient and sustainable platform for the cascaded detoxification and recycling of MP.
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PubMed
高影响因子
ADVANCED MATERIALS
·
2025
·
IF 26.8
Tianrui Li,Baoling Tang,Jiance Jin,Kai Han,Haoran Zhang,Hailian Zhao,Xuejie Zhang,Maxim Molokeev,Yuzhen Wang,Zhiguo Xia,Bingfu Lei
Cu(I)-based halide scintillators are promising candidates for X-ray detection due to excellent scintillation and low-cost solution processability. However, the rational design of Cu(I)-based halide scintillators remains challenging due to insufficient theoretical frameworks elucidating their structure-property correlations. In this work, two Cu(I)-based hybrid metal halides, Cu 2 I 4 -IC (Ionic compound) are designed and Cu 4 I 4 -CC (Coordination compound) via bonding mode control engineering. The Cu 2 I 4 -IC exhibits blue emission, and the Cu 4 I 4 -CC exhibits yellow emission, and the photoluminescence quantum yield (PLQY) of Cu 2 I 4 -IC and Cu 2 I 4 -IC are 91% and 100% respectively. The non-radiative transitions are reduced due to the high rigidity of Cu 4 I 4 , resulting in a light yield up to 67 500 photons MeV −1 and a detection limit as low as 47.3 nGy s −1 of Cu 4 I 4 -CC. Additionally, a high-performance scintillator hydrogel based on Cu 4 I 4 -CC with polyvinyl alcohol (PVA),H 2 O and dimethyl sulfoxide (DMSO) is innovatively developed. Owing to the high transmittance, the large-area scintillator hydrogel film (10 × 10 cm 2 ) achieves an X-ray imaging resolution of 14 lp mm −1 . Furthermore, the synergistic effects of hydrogen bonding and coordination bonding endow the hydrogel scintillator with excellent plasticity and flexible stretchability. The Cu 4 I 4 -CC@PVA hydrogel proves promising for X-ray imaging with excellent stability in harsh environments, matching state-of-the-art scintillators.
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高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
·
2024
·
IF 20.2
Bo Liu,Miao Cheng,Chunyang Zhang,Yitao Si,Jiancheng Zhou,Yuqi Ren,Jie Guan,Lunbo Duan,Maochang Liu,Dengwei Jing,Naixu Li
CO 2 photoreduction into high-value-added C 2+ products struggles with energetic challenges in forming critical intermediates and multiple C−C bonds. Herein, an effectively synthesized photocatalyst , Bi 2 WO 6 nanosheets with oxygen vacancies anchoring Au and Cu dual single atoms on the surface, can convert CO 2 and H 2 O vapour into C 3 H 6 and C 2 H 4 . The high product selectivity of 18.2 % for C 3 H 6 and 65.4 % for total C 2+ hydrocarbons are achieved under concentrated light irradiation (2.4 W·cm −2 ). Au-Cu dual-single-atom sites and defect engineering strategies exhibit synergistic effects on optimizing the reaction thermodynamics and charge kinetics for CO 2 conversion. Theoretical calculations provide reference values for reaction pathways of C 3 H 6 and C 2 H 4 formation, with the C−C couplings being potential determining steps of multicarbon product formation. Our work offers a promising strategy with a combination of concentrated light irradiation technology and catalyst modification to achieve high selectivity of C 2+ products.
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高影响因子
ACS Nano
·
2022
·
IF 18.027
Yujun Zhang,Shenghua Ye,Min Gao,Yong Li,Xuan Huang,Jun Song,Hong Cai,Qianling Zhang,Junmin Zhang
Heterogenization of homogeneous catalysis through supported single-atom catalysts (SACs) provided a feasible solution to recycling catalysts while keeping its efficiency in chemical synthesis. In this work, Cu SACs anchored on N-doped graphene (Cu SACs/NG) were prepared and first used for C–N coupling reactions. During the preparation, Cu–N–C structures, including Cu–N4 moieties, were formed in a one-step pyrolysis method. As-prepared Cu SACs/NG exhibited excellent catalytic activity toward C–N coupling reactions with a broad scope of substrates and showed outstanding performance of recycling. Compared with Cu nanoparticles (Cu NPs/NG), the advantages of single-atom catalysts were validated via experimental and theoretical calculations. The enhanced performances were attributed to increasing the number of active sites and increasing the intrinsic activity of each active site. This work provides an alternative synthetic strategy for fabricating atomically dispersed SACs and represents a significant advance for coupling reactions.
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高影响因子
Chemical Science
·
2024
·Vol. 15
·期 24
·9173-9182
·
IF 7.6
Jiye Feng,Wenbiao Zhang,Danni Shi,Yingshuai Jia,Yi Tang,Yuying Meng,Qingsheng Gao
Multi-phase interfaces are promising for surmounting the energy barriers of electrochemical CO2 reduction involving multiple electron transfer steps, but challenges still remain in constructing interfacial micro-structures and unraveling their dynamic changes and working mechanism. Herein, highly active Ag/Cu/Cu2O heterostructures are in situ electrochemically restructured from Ag-incorporating HKUST-1, a Cu-based metal–organic framework (MOF), and accomplish efficient CO2-to-C2H4 conversion with a high faradaic efficiency (57.2% at −1.3 V vs. RHE) and satisfactory stability in flow cells, performing among the best of recently reported MOFs and their derivatives. The combination of in/ex situ characterizations and theoretical calculations reveals that Ag plays a crucial role in stabilizing Cu(I) and increasing the CO surface coverage, while the active Cu/Cu2O interfaces significantly reduce the energy barrier of C–C coupling toward the boosted ethylene production. This work not only proves MOFs as feasible precursors to derive efficient electrocatalysts on site, but also provides in-depth understanding on the working interfaces at an atomic level.
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高影响因子
ACS Sustainable Chemistry & Engineering
·
2024
·
IF 7.1
Honghui Gong,Fei Wang,Qi Li,Longxing Wei,Juan Zhang,Yuan Ma,Yifan Rui,Xian-Lei Shi
Selective synthesis of cyclopentanol (CPL) from biomass-derived furfural (FAL) is highly attractive, but it still faces serious challenges. In this work, an alloyed Cu–Co catalyst derived from Cu–Co–Al layered double hydroxide (LDH) was grafted onto sulfur-doped coffee biochar for the first time (Cu–Co–Al/SCB). Cu–Co–Al/SCB achieved a maximum CPL yield of 97.5% and a high turnover frequency (TOF) of 15.6 h–1 in the selective hydrogenative rearrangement of FAL at 140 °C. The characterization results demonstrated that grafting Cu–Co–Al onto SCB results in the formation of Cu–Co alloys and a strong interaction between them. Further characterization and activity tests demonstrated that the formation of a highly dispersed Cu–Co alloy and in situ generated Brønsted acid sites collaboratively catalyzes the selective hydrogenative rearrangement of FAL to CPL over Cu–Co–Al/SCB, and the strong interaction between the Cu–Co alloy and sulfur-doped coffee biochar endowed Cu–Co–Al/SCB with remarkable stability. As a result, Cu–Co–Al/SCB is a promising catalyst for the selective hydrogenative rearrangement of FAL.
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MATERIALS CHEMISTRY AND PHYSICS
·
2025
·
IF 4.7
Ruofan Wang,Yanfu Yan,Wenjun Li,Zhiming Li
Cu–Al soft soldering plays a crucial role in the fabrication of Cu–Al composites. In this study, a new rosin-type flux for Cu–Al direct soldering was synthesized, and G-1 (Sn42Bi58 paste) and G-2 (Sn64.7Bi35Ag0.3 paste) soft soldering pastes were prepared. The results of flux physicochemical tests are as follows: density 1.11 g/cm 3 , pH 5.2, viscosity 32 Pa s, and non-corrosive to the copper plate. These are in line with the requirements for soldering applications. The wettability test results show that G-1 and G-2 displayed good wettability on the Cu and Al plates. This is in line with the standard Cu–Al soft soldering paste. The mechanical property test showed that G-2 had better mechanical properties than G-1, with a tensile strength of 112.57 MPa. SEM revealed that the IMC (intermetallic compound) layer of G-1 was flatter than that of G-2. This is closely related to the fact that the Ag in Sn64.7Bi35Ag0.3 powders can reduce the enrichment of metallic Bi and refine the grains.
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Advanced Energy Materials
·
2021
·Vol. 12
·期 6
·2103644
·
IF 29.368
Shaotang Yu,Bingyan Li,Jingjing Jiang,Xinge Liu,Shasha Hao,Shuaiqi Han,Weibo Yan,Hao Xin
Solution-processed Cu(In,Ga)(S,Se) 2 solar cells have reached 18% efficiency but still remain much lower compared to state-of-the-art vacuum based solar cells. In comparison to vacuum deposited precursor films, which mostly consist of stacked metal and/or metal chalcogenide layers and takes a liquid Cu 2− x Se assisted grain growth mechanism, solution-processed precursor films normally have a chalcopyrite structure that is already developed. Understanding the grain growth mechanism of solution-processed absorbers is crucial to control the electronic properties and further improve the device photovoltaic performance. Here, the grain growth mechanism of a N -methyl-pyrrolidone solution processed precursor film with composition from Cu-poor to Cu-rich is systematically investigated. Characterizations show that the chalcopyrite structured CuInS 2 precursor film takes a direct phase transformation grain growth mechanism and forms the CuIn(S,Se) 2 (CISSe) absorber without the presence of a detrimental Cu 2− x Se phase with Cu/In ratio up to unit. Beyond the stoichiometric composition, the coexistence of Cu 2− x Se facilitates grain growth but deteriorates device performance. The direct phase transformation mechanism not only avoids detrimental Cu 2− x Se but also enables fabrication of a highly efficient CISSe device near stoichiometric composition with high tolerance to the Cu/In ratio (from 0.90 to 1.05). By preliminary optimization, a CISSe solar cell with an efficiency of 13.6% is achieved in ambient air with a Cu/In ratio of 0.93.
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