SENSORS AND ACTUATORS B-CHEMICAL
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2024
·
IF 8
Shulong Wang,Yanni Luo,Jianniao Tian,Fanggui Ye,Zhihui Luo,Shulin Zhao
Metformin is currently the most commonly used oral drug for the treatment of diabetes. However, excessive use can up-regulate hydrogen sulfide (H 2 S) levels in the liver, which subsequently leads to severe liver injury and hepatotoxicity. Therefore, using endogenous H 2 S as a target molecule of an intelligent triggering sensor, a nano-probe that can recognize H 2 S with high specificity, and achieve non-invasive and highly specific in situ second near-infrared (NIR-II) photoacoustic (PA) imaging of hepatotoxicity induced by metformin would be welcomed in the field. In this work, we designed and synthesized a smart-responsive PA sensor based on metal-organic framework as bioreactor to dynamically monitor the changes in H 2 S levels induced by metformin. Molecular sieve imidazole framework-8 (ZIF-8) was selected as the coating layer, and the unique pore size of ZIF-8 was used to improve the selectivity of the sensor to H 2 S. The designed CuO x NPs@MOFs sensor turned on the PA signal of the sensor in NIR-II by in situ sulfation with overexpressed endogenous H 2 S in injured liver tissues. More importantly, the changes in the PA signal could non-invasively monitor liver injury in real time and with high sensitivity. Utilizing the unique structure in the MOFs sensor to selective recognize H 2 S molecules, ultra-sensitive monitoring and PA imaging of H 2 S in vitro and in vivo were achieved.
研究领域:
生物医学工程
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药学
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医学影像
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纳米技术
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产品关联
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2021
·
IF 6.707
Yuhui Ma,Yewei Zhang,Heyi Zhang,Hao Lv,Ruiyuan Hu,Wei Liu,Songle Wang,Mao Jiang,Liang Chu,Jian Zhang,Xing'ao Li,Ruidong Xia,Wei Huang
Interfacial layer is deemed as an efficient approach to align the energy level and reduce the carrier recombination at the interfaces. Therefore, for the first time, a facile yet effective method to enhance carrier transport by copper oxide quantum dots (CuO x QDs) interfacial layer in inverted perovskite solar cells (PSCs) is developed. The high mobility of CuO x QDs interfacial layer could boost the performance of PSCs by providing a better electrical carrier transport. Furthermore, the higher crystallinity of perovskite layer on CuO x QDs layer reduced the charge trap state densities, which leads to an increase in carrier recombination resistance. As a result, our inverted PSCs exhibit a power conversion efficiency (PCE) of 19.91%, a 14.6% increment compared with the PCE of a control device. Our finding demonstrates the promise of enhancing carrier transport by interfacial layer for high-performance PSCs and expands choice of interfacial layer materials in PSCs.
研究领域:
材料科学
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能源科学
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产品关联
DOI
高影响因子
Journal of Materials Chemistry A
·
2018
·Vol. 6
·期 9
·4167-4178
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IF 9.931
Siyi Guo,Yongrong Jiang,Liuyi Li,Xiangdong Huang,Zanyong Zhuang,Yan Yu
Despite extensive efforts dedicated to researching two-dimensional (2D) transition metal oxides (TMOs), significant challenges still remain to simplify their synthesis and improve the activity and reusability of these materials. In this work, we prepared a 2D Cu-containing layered double oxide (CuLDO) under mild conditions. Only via stirring LDO in diluted Cu solution at room temperature could ion exchange between Mg in LDO and Cu ions from that solution allow fixing of Cu onto the surfaces of LDO nanosheets with good dispersion at a high density. The obtained CuLDO was then annealed to give CuOx-rich nanosheets (denoted as c-CuLDO), which maintained a thin thickness of 5–9 nm with a flowers-like architecture thanks to the structural memory of the source materials. The excellent morphology of CuOx-based nanosheets helped to avoid the restacking of nanosheets. Such a c-CuLDO outperformed many other reported Cu-based nanomaterials as a catalyst in phenol degradation (k = 0.335 min−1) because c-CuLDO could efficiently activate persulfate to generate abundant amounts of sulfate radical (SO4˙−). Furthermore, the catalytic activity of used c-CuLDO could be restored by a simple hydrothermal treatment. The developed chemistry could also be used to remove copper ions from wastewater, generating value-added Cu-based nanomaterials and eliminating waste at the same time. The current results may inspire the design of novel low dimensional nanomaterials that are difficult to synthesize directly by conventional bottom-up strategies.
研究领域:
材料科学
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环境科学
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产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2025
·
IF 8.2
Junfang Ding,Changjin Xu,Xinyi Yao,Kunming Hou,Yinkang Yang,Dan He,Hao Chai,Xiaomin Sun,Shanghong Zeng
The development of ultrafine metal oxide nanoparticles anchored on reducible oxide supports with precisely engineered interfacial active sites has emerged as a critical frontier in heterogeneous catalysis. However, conventional synthesis strategies struggle to reconcile high loading with ultrafine dispersion, often leading to nanoparticle aggregation and compromised stability. Herein, we present a coordination chemistry-driven strategy integrating the hard–soft acid–base principle with a water-etching process to synthesize ultrafine CuOx nanoparticles anchored on CeO2. By exploiting the differential coordination affinities of Ce3+ and Cu2+ with carboxyl ligands in a bimetallic BTC precursor, selective segregation during solvothermal synthesis was achieved. Ce3+ formed a stable framework with carboxyl groups, while Cu2+ underwent a hydrolysis-induced migration to surface defect sites. Regulating the Cu2+/Ce3+ ratio enabled precise control over CuOx dispersion, interfacial Cu–O–Ce bonding, and local structure. The optimized catalyst exhibited a remarkable Cu loading of 21.94% with high dispersion, lattice distortion, and enhanced metal–support interactions. Notably, the designed catalyst demonstrated exceptional stability under H2-rich streams, which achieved a CO conversion enhancement from 67.4 to 77.7% over 40 h through the interfacial stabilization of metastable Cu+-Ov-Ce4+ active configurations. Advanced characterization and density functional theory (DFT) calculations revealed that the enhanced interfacial Cu–O–Ce interactions and unsaturated coordinated CuOx species facilitated electron transfer, oxygen activation, and CO adsorption, synergistically boosting the catalytic performance via the Mars–van Krevelen mechanism. This work establishes a rational coordination chemistry-guided paradigm for designing high-performance catalysts with precisely engineered active sites.
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DOI
PubMed
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
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2022
·
IF 7.139
Ying Duan,Pan Guo,Dong Sui,Dongsheng Deng,Tianliang Lu,Yanliang Yang
The development of a cost-effective catalyst for hydrogen evolution from ammonia borane is of importance for the application of AB as a hydrogen storage material. In this manuscript, a series of noble metal catalysts M@CuOx/C (M = Ru, Rh, Pd, and Pt) are prepared by the galvanic reduction method. The catalysts are characterized by XRD , TEM , EDS mappings and lines scanning, XPS , HAADF-STEM, and ICP-OES. The noble metal is highly dispersed on the surface of Cu nanoparticles . The morphology of Cu nanoparticles changed according to different metals after the introduction of noble metal and there has an interaction between the noble metal and Cu. The M@CuOx/C is used for the hydrolysis of AB. For the same metal catalyst, the activity of M@CuOx/C is increased by about 3–7 times than the corresponding M/C at 298 K. The Rh shows the highest TOF and lowest activation energy among the four noble metals.
研究领域:
材料科学
·
催化化学
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DOI
高影响因子
RSC Advances
·
2020
·Vol. 10
·期 59
·36111-36118
·
IF 3.119
Huang Kaimeng,Chen Siyuan,Xia Changjiu,Li Chenhao,Zhu Bin,Gao Hongyi,Peng Xinxin,Lin Min,Luo Yibin,Wang Ge,Shu Xingtian
The oxidative coupling of imines to ketazine with molecular oxygen is a green process towards the synthesis of hydrazine or hydrazine hydrate, which could efficiently address the economic and environmental issues of the traditional Raschig or peroxide-ketazine process. Herein, we developed an efficient heterogeneous base-free benzophenone imine oxidative coupling route with O2 catalyzed by Cu/CuOx/carbon materials derived from MOFs under mild conditions. Under optimized conditions, the conversion of BI is up to 98.2% and the selectivity of ketamine is 94.9%. This catalyst has excellent structure stability, recycling, and regeneration performance, owing to the carbonization of organic ligands of MOF at high temperature. More importantly, it is confirmed that the metallic Cu core is essential to improve the catalytic performance of the CuO shell in the BI oxidative coupling reaction, due to the promotion of electron transfer in the CuO surface, making dissolved O2 molecules more easily insert oxygen vacancies. This strategy might open an avenue to the sustainable catalytic synthesis of hydrazine or hydrazine hydrate.
研究领域:
催化化学
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材料科学
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产品关联
DOI
PubMed
高影响因子
DESALINATION
·
2023
·
IF 9.9
Jing Jiang,Ruiru Yang,Zerong Tao,Sheng Tu
Renewable solar energy meeting photothermal materials provides a promising approach for freshwater production via interfacial steam generation. The design and manufacture of high-performance evaporators are still highly anticipated for practical applications. Herein, the robust and durable solar evaporator is proposed and fabricated by integration of photothermal Cu-CuO x /NC (CNC) and three-dimensional porous structure heat-insulated polyurethane (PU) foam with polyvinyl alcohol (PVA)/sodium alginate (SA) modifications. The designed PVA-SA-CNC/PU simultaneously possesses fast water transmission, broadband light trapping, satisfactory mechanical robustness and effective heat confinement. When applied as a solar evaporator, the PVA-SA-CNC/PU exhibits a high evaporation rate of 1.99 kg m −2 h −1 and operates stably within ten consecutive cycles under one-sun illumination, which can also handle salt tolerant desalination of seawater and saline water to sustainably produce freshwater. In addition, the functional versatility of the fabricated evaporator is explored to purify various wastewater. This study establishes a highly efficient integrated evaporator with multitasking water purification towards the solution of water shortage.
研究领域:
能源科学
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材料科学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING SCIENCE
·
2022
·
IF 4.889
Minhui Rao,Mengyu Wang,Xuelin Zheng,Danmei Pan,Congbin Hong,Kaidong Chen,Liangxu Lin
Dense CuO x -CoO y nano-heterostructures were uniformly assembled on the surface of graphene via surfactant induced assembly and hydrolysis with the presence of PVP and NaBH 4 . As-prepared CuO x -CoO y -PVP/G composite exhibited excellent performance for selective oxidation of 5-HMF to FDCA in aqueous solution with NaClO as oxidant at 30 °C, which is comparable to noble metal catalysts. The outstanding performance can be attributed to fascinating synergetic contributions from the CuO x -CoO y heterostructure on graphene substrate, giving improved interfacial contact, increased active sites and accelerated electron transfer process to promote the catalytic reaction. This work provides a high-performing catalyst for oxidation of 5-HMF to FDCA, as well as an ideal design of metal-oxide heterostructures/graphene composite catalysts for more broad applications.
研究领域:
催化
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材料科学
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化学工程
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纳米技术
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2026
·Vol. 18
·期 31
·42970-42981
·
IF 7.8
Ma Chaofan,Su Huiyu,Liu Zhongneng,Zhu Chaoqi,Yang Yazhou,Zeng Dawen
It is crucial to detect hydrogen (H 2 ) release from battery packs to provide early warning of battery thermal runaway. In this article, the hollow octahedral CuO x /TiO 2 were prepared using an efficient MOF template strategy, and nitrogen (N) -doped carbon (C) nanofibers embedded with CuO x /TiO 2 were designed by electrospinning, which were CuO x /TiO 2 @NCFs. The hollow heterojunctions (CuO x /TiO 2 ) formed based on MOF templates can reduce the recombination rate of carriers in TiO 2 , and DFT calculations reveal charge transfer occurring at the heterojunction, with a substantial migration of electrons from TiO 2 to CuO, significantly enhancing the ability of TiO 2 surface to adsorb H 2 . Simultaneously, the nanofibers composed of CuO x /TiO 2 and PAN contain substantial amounts of nitrogen and carbon. The introduced N atoms can activate the adjacent C atoms, the 3D framework constructed from N-doped C nanofibers exhibits extremely strong electron transport capability. At the optimal TiO 2 :PAN ratio of 4.0:1, the sensor achieves the response of 48% toward 10 ppm H 2 , and can detect as low as 20 ppb H 2 at room temperature, which is a potential competitive candidate for monitoring LIBs thermal runaway.
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DOI
PubMed
高影响因子
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