2D Materials
·
2022
·Vol. 9
·期 2
·025028
·
IF 6.861
Meng Yuan,Haodong Shi,Cong Dong,Shuanghao Zheng,Kai Wang,Shaoxu Wang,Zhong-Shuai Wu
Some vital challenges are main obstacles for further development of lithium–sulfur (Li–S) batteries such as low capacity and poor cycle stability resulted from polysulfide shuttling behavior, the physical/chemical entrapment is regarded as an effective method to inhibit and catalyze polysulfides. Herein we design a cross-linked framework of reduced graphene oxide anchored with Cu2−xSe nanoparticles (Cu2−xSe@rGO) by building an electrolyte/Cu2−xSe/graphene triple-phase interface to be a high-efficiency electrocatalyst for Li–S batteries. Importantly, this three-dimensional conductive network possesses a large specific surface area with high ion transport capability, meanwhile providing strong physical constraint for efficient adsorption of soluble polysulfides. Further, this triple-phase catalytic interface provides strong chemical adsorption and abundant Cu2−xSe nanoparticle sulfiphilic active sites, effectively inhibiting the dissolution of polysulfides and guaranteeing the efficient polysulfide adsorption catalysis as well as rapidly uniform Li2S nucleation. Consequently, with the Cu2−xSe@rGO separator, a lower capacity decay rate about 0.059% per cycle after 500 cycles at 2 C is obtained. What's more, with a higher areal sulfur loading of 3.0 mg cm−2, the capacity is still maintained at 805 mAh g−1 over 100 cycles. Therefore, this work will open new avenue to construct 2D transition metal selenide for superior performance Li–S batteries.
研究领域:
材料科学
·
能源存储与转换
✓ 已验证
DOI
高影响因子
ANALYTICAL CHEMISTRY
·
2018
·
IF 6.042
Lin Yang,Ming Xuan Gao,Hong Yan Zou,Yuan Fang Li,Cheng Zhi Huang
Nature enzyme-based immunoassays have been widely used in fundamental scientific research and clinical diagnosis. However, the limitations of natural enzyme, such as the low physical/chemical stability or susceptibility to protein denaturation, greatly restrained its applications. In this article, we reported a new enzyme-free SERS immunoassay by utilizing plasmonic Cu2–xSySe1–y nanoparticles (NPs) as nanocatalyst to catalyze the click chemistry between the azido and alkynyl substrate which is used as the SERS signal reporter. The unique vibration of C≡C of alkynyl in the Raman-silent region (1800–2800 cm–1) is not overlapped with the signals of the other conventional Raman reporters or endogenous biological species, and thus it can make sure the enzyme-free SERS immunoassay has high selectivity and sensitivity. As a proof of concept, prostate-specific antigen (PSA), a biomarker of prostate cancer in blood, has been detected. The SERS immunoassay shows good analytical performance for PSA in the range of 3–120 ng mL–1, and it has been successfully applied to detect PSA in the serum samples of prostate cancer patients, proving that the proposed enzyme-free SERS immunoassay has great potential in the clinical diagnosis of cancer.
研究领域:
生物医学工程
·
癌症诊断
·
纳米技术
·
免疫学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CHINESE JOURNAL OF ANALYTICAL CHEMISTRY
·
2015
·
IF 0.754
Xin-Ran WANG,Bo-Wei LI,Hui-Yan YOU,Ling-Xin CHEN
A novel highly selective fluorescent sensor was fabricated based on the microfluidic paper-based analytical device for the determination of Cu 2+ in aqueous samples. The glass fiber paper was activated using HCl solution and incubated in CdTe quantum dots (QDs) solution to obtain a fluorescent substrate. The Cu 2+ imprinted polymers (Cu-IIP) was synthesized using 3-aminopropyl triethoxysilane (APTES) as functional monomer and TEOS as cross-linker on the surface of the glass fiber in paper at room temperature. This fluorescent sensor was successfully applied to determine the amount of Cu 2+ in aqueous samples that mainly depended on the electron transition between the CdTe quantum dots and the Cu 2+ for specific recognition Cu 2+ . A good linearity was presented in the range of 0.032–3.2 mg L −1 , and the limit of detection was achieved at 0.012 mg L −1 . Satisfactory recoveries ranging from 99.9% to 122.5% were attained for spiked seawater and lake water samples with four concentration levels of Cu 2+ . The paper@QDs@Cu-IIP showed a good performance and significant application perspectives for rapid detection of Cu 2+ by comparing with the results of inductively coupled plasma-mass spectrometry (ICP-MS).
研究领域:
分析化学
·
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2021
·Vol. 45
·期 27
·11983-11991
·
IF 3.591
Wen Lu,Jiuzhou Shi,Jichao Chen,Lu Sun,Lingcen Shao,Hongyu Ren,Mengmeng Huang,Yanqin Wang,Shilong Yang,Xu Li
This study describes the synthesis of a coumarin-based reversible fluorescent probe BuCAC for the detection of Cu2+ and S2− in CH3CN : PBS (v/v = 8 : 2, pH = 7.4) solution. The resulting BuCAC exhibited high sensitivity (detection limit = 3.03 × 10−7 M) and selectivity towards Cu2+ through a 2 : 1 binding mode. In the presence of S2−, the BuCAC–Cu2+ recovered to BuCAC and CuS, which in turn perform the function of a sensitive probe with a lower detection limit of about 1.7 × 10−7 M. This “on–off–on” process can easily occur in 1 min with a repetition of at least 5 times. The sensing mechanism was confirmed by Job's plot analysis, MS, and density theory calculation. Besides, fluorescence imaging in zebrafish, HeLa cells, and soybean root tissue revealed that the probe BuCAC could serve as a valuable tool for monitoring and tracking intracellular Cu2+ and S2− while benefiting from its excellent fluorescence performance and lower cytotoxicity.
研究领域:
分析化学
·
生物化学
·
生物医学工程
·
细胞生物学
✓ 已验证
DOI
高影响因子
CRYSTENGCOMM
·
2014
·Vol. 16
·期 37
·8684-8690
·
IF 3.858
Haihang Ye,Aiwei Tang,Chunhe Yang,Kai Li,Yanbing Hou,Feng Teng
High-quality rhombohedral digenite (Cu1.8S) nanocrystals (NCs) were synthesized using a facile one-pot approach, in which foreign metal ions (Zn2+ and Cd2+) were added to drive a transformation in the phase and morphology of the as-obtained Cu2−xS NCs. During this process, the as-obtained products could transform from monoclinic djurleite (Cu1.94S) NCs to rhombohedral Cu1.8S NCs in the presence of Zn2+ and Cd2+ ions by extending the reaction time and increasing the reaction temperature, which could provide sufficient energy to overcome activation energy barriers. Moreover, we further studied the evolution of the plasmonic properties of the as-obtained Cu2−xS NCs, and the near-infrared (NIR) localized surface plasmon resonance (LSPR) absorption wavelength could be tuned by varying the amount of Zn2+ and Cd2+ ions added into the reaction system, which was in close association with the change in copper deficiencies and free hole densities induced by foreign metal ions.
研究领域:
材料科学
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
Advanced Science
·
2019
·Vol. 6
·期 20
·1901461
·
IF 15.804
Xiaojuan Huang,Guoying Deng,Yong Han,Guizhu Yang,Rujia Zou,Zhiyuan Zhang,Shuyang Sun,Junqing Hu
Stimuli-responsive nanomedicines have become a recent research focus as a candidate for cancer treatment because of their effectiveness, sensibility, and minimal invasiveness. In this work, a novel nanosystem is developed based on Cu 2− x S@MnS core–shell nanoparticles (CSNPs) in which the Cu 2− x S core serves as a photosensitizer to generate hyperthermia and reactive oxygen species (ROS), and the MnS shell is used in H 2 O 2 -responsive O 2 production. Cu 2 −x S@MnS CSNPs with an independent core and shell ratio are synthesized by a controllable hot-injection method, resulting in an optimal photothermal (PT) effect with a PT conversion efficiency of up to 47.9%. An enhanced photodynamic (PD) effect also occurs in an H 2 O 2 environment. More significantly, in vivo experiments demonstrate that Cu 2 −x S@MnS CSNPs can mediate tumor shrinkage in both HeLa tumor cell line-derived xenograft (CDX) and head and neck squamous cell carcinoma (HNSCC) patient-derived xenograft (PDX) models, with the capability of being used as a T1-enhanced magnetic resonance (MR) contrast agent. These results suggest the great potential of as-prepared Cu 2 −x S@MnS CSNPs as photo/H 2 O 2 -responsive therapeutic-agents against tumors, even in a complicated and heterogeneous environment, thus promoting the clinical translation of nanomedicine.
研究领域:
生物医学工程
·
纳米医学
·
癌症治疗
✓ 已验证
产品关联
DOI
PubMed
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2021
·
IF 4.539
Rongchuang Geng,Hanxiao Tang,Qiujuan Ma,Luping Liu,Weisheng Feng,Zhijuan Zhang
In this work, a series of bimetallic Ag/Zn-ZIF-8 materials were successfully developed for sensing toward traces of Fe 3+ and Cu 2+ . The bimetallic Ag/Zn-ZIF-8 was synthesized via a one-pot method. Interestingly, this obtained bimetal Ag/Zn-ZIF-8 exhibited high photoluminescence property and excellent fluorescence quenching response to target analytes with high selectivity , sensitivity and detection limits of 3.9 μM for Fe 3+ , 6.7 μM for Cu 2+ ions, respectively, both of which have been confirmed to be very comparable or better than the reported LMOFs sensors. The possible photoluminescence quenching mechanisms were studied in detail, revealing that the competitive absorption of excitation source and resonance energy transfer (RET) resulted from the host (imidazole of the framework, Lewis basic sites)-guest (metal ions of Cu 2+ and Fe 3+ , Lewis acid sites) interaction should be responsible for high efficiency fluorescence quenching. The binding energies of metal ions adsorption on the ZIF-8 obtained by DFT simulation were further performed to explain the higher quenching effect of Fe 3+ than Cu 2+ .
研究领域:
材料科学
·
分析化学
·
纳米技术
✓ 已验证
DOI
高影响因子
SENSORS
·
2024
·Vol. 24
·期 12
·3809
·
IF 3.4
Feng Chen,Mingfu Zhao,Bin Zhang,Minggang Zhao,Ye Ma
Copper ion (Cu2+) pollution poses a serious threat to marine ecology and fisheries. However, the complexity of seawater and its interference factors make the online detection of Cu2+quite challenging. To address this issue, we introduce the concept of the photo-assisted adjustment barrier effect into electrochemical detection, using it as a driving force to generate electrochemical responses. The Schottky barrier demonstrates a remarkable regulatory influence on the electrochemical response under photoexcitation, facilitating the response through Cu2+adsorption. We developed a 4-MBA-AuNPs/CdS/FTO composite that serves as a sensitive platform for Cu2+detection, achieving a detection limit of 70 nM. Notably, the photo-assisted adjustment of the barrier effect effectively counters the interference posed by ions in seawater, ensuring accurate detection. Furthermore, the sensor exhibits a promising recovery rate (99.62–104.9%) in real seawater samples, highlighting its practical applications. This innovative approach utilizing the photo-assisted adjustment barrier effect offers a promising path for developing electrochemical sensors that can withstand interference.
研究领域:
环境科学
·
分析化学
·
材料科学
·
电化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
BIOMATERIALS
·
2020
·
IF 10.317
Yuanlin Wang,Zhenglin Li,Ying Hu,Jing Liu,Mengyu Guo,Hengxiang Wei,Shanliang Zheng,Tingting Jiang,Xiang Sun,Zhuo Ma,Ye Sun,Flemming Besenbacher,Chunying Chen,Miao Yu
In vivo chemical reactions activated by the tumor microenvironment (TME) are particularly promising for antitumor treatments. Herein, employing Cu 2-x Se-Au Janus nanoparticles (NPs), photothermal conversion-coordinated Fenton-like and photocatalytic reactions are demonstrated in vitro/vivo . The amorphous form of Cu 2-x Se and the catalytic effect of Au benefit the OH generation, and the photo-induced electron‒hole separation of the Janus NPs produces additional OH. The plasmonic electrons of Au facilitate the conversion from Cu 2+ to Cu + . Both Cu 2-x Se and Au contributes to the efficient photothermal conversion, further promoting the reactions. As a result, the H 2 O 2 utilization rate is largely increased, and remarkable generation of reactive oxygen species is achieved by cell endogenous H 2 O 2 in vitro/vivo . A competent tumor inhibition effect is afforded, with high-contrast multimodal imaging. This work opens up the route synergistically integrating photothermal therapy with chemodynamic therapy and photocatalytic therapy into tri-combination antitumor therapy, simply by heterojunction of semiconductor and noble metal.
研究领域:
生物医学工程
·
纳米医学
·
肿瘤学
✓ 已验证
DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2025
·
IF 5.4
Jiuyu Chen,Zhiwen Liu,Baozhong Zhu,Chensheng Gao,Yunlan Sun
Radioactive iodine (I) produced in the nuclear industry can be eliminated through solid-phase adsorption. Nevertheless, conventional adsorbents suffer from limited capacity, poor selectivity, and insufficient stability. In this study, metallic copper modified nitrogen-doped carbon composites (Cu x -NC) were prepared from a pre-synthesized template of Cu 2+ -zeolite imidazole framework-8 (Cu 2+ -ZIF-8) by ball milling combined with pyrolysis processes. The surface physical and chemical properties of Cu x -NC composites were characterized, and then applied to remove iodide (I - ) in aqueous solutions. The experimental results indicated that Cu 0 introduced to nitrogen-doped carbon not only significantly enhanced I - removal but also achieved an exceptional adsorption capacity of 269.2 mg/g by incorporating 35 % copper and setting the pyrolysis temperature at 1000 °C. Notably, under acidic (pH = 3) and blown air conditions, the adsorption capacity was markedly increased, attaining 383.3 and 474.3 mg/g, respectively. The Cu 35 -NC demonstrated exceptional selectivity for I - in the presence of interfering anions such as Cl - and SO 4 2- . Mechanism studies showed that as-fabricated materials eliminated I - through adsorption and oxidation. The presence of Cu 0 particles activated molecular oxygen to release Cu + and generate H 2 O 2 , resulting in I - being adsorbed and oxidized. These findings underscore the significant potential of the economical Cu x -NC for the effective elimination of radioactive iodide.
研究领域:
环境科学
·
材料科学
·
核工程
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
SURFACE & COATINGS TECHNOLOGY
·
2019
·
IF 3.192
Jingcheng Du,Cailong Zhou,Zhijie Yang,Jiang Cheng,Yuanyuan Shen,Xinjuan Zeng,Luxi Tan,Lichun Dong
The economic and green synthesis of metal-organic frameworks (MOFs) is of great significance. In this work, a facile method for preparing HKUST-1 MOFs at room temperature with insoluble Cu 2 (OH) 2 CO 3 particles and film as the precursors was developed. The as-prepared HKUST-1 MOFs were characterized by using the XRD , Raman spectrum , FTIR, XPS and N 2 adsorption-desorption analyses, and the wetting property of the HKUST-1 film was also evaluated. The results demonstrated that the MOF film decorated copper mesh possesses the promising underwater superoleophobicity and underoil superhydrophobicity, with the contact angles of non-wetting liquids larger than 150°. The on-demand oil/water separation was subsequently realized through a prewetting method, obtaining the high separation efficiency up to 97%. The facile route by using solid precursors developed in this work might provide a new strategy for preparing MOFs, and the special wetting properties of the as-prepared materials could enrich the applications of MOF films as well.
研究领域:
材料科学
·
化学工程
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2019
·
IF 8.355
Meiqing Chen,Pingxiao Wu,Nengwu Zhu,Zhi Dang,Yingzhi Bi,Feike Pei
MgMn-layered double hydroxide (MgMn-LDH) was fabricated by a homogeneous co-precipitation method. MgMn-LDH exhibited excellent Cu 2+ immobilization with the maximum removal capacities of 668 mg·g −1 . Based on the outstanding fixation ability, the feasibility of re-utilization of spent Cu-MgMn-LDH as catalyst for drug degradation was investigated. Calcination in muffle furnace at 300 °C strengthen the stability of spent Cu-MgMn-LDH and obtained CuO-MgMn-LDO-300. As-obtained CuO-MgMn-LDO-300 consisted of CuO, Mg 2 MnO 4 and MgO. CuO-MgMn-LDO-300 exhibited superior catalytic performance, almost 97% of sulfamethoxazole (SMX) was removed within 30 min. The TOC removal for CuO-MgMn-LDO-300 reached to 76%, while that of MgMn-LDO-300 was only 5%. These were profit from convenient electronics transfer due to oxygen vacancy and synergism between Cu and Mn. Therefore, CuO-MgMn-LDO-300 could effective activate persulfate (PS) to generate 1 O 2 and SO 4 – for SMX degradation. The performance showed good adaptability in a wide pH (from 3 to 9), low dissolution of Cu and Mn verified the security of re-utilization. Moreover, more than 95% of ciprofloxacin (CIP), tetracycline (TC) and sulfadiazine (SD) could also be degraded by the obtained materials. The catalysis system of CuO-MgMn-LDO-300 was also effective applied in lake and river water contaminated by SMX. Hence, the re-utilization strategy of spent Cu-MgMn-LDH was feasible and obtained an excellent catalytic material for antibiotics degradation.
研究领域:
环境科学
·
催化材料
·
水处理技术
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）