INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
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2025
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IF 8.3
Zhiyong Yang,Guofang Zhang,Ruiqin Zhang,Lu Bai,Jianyi Xu,Ping Yuan,Lingliang Kong,Jingyi Zhang,Juan Du
The development of nickel-metal hydride battery anodes has long been limited by the inherent capacity decay of the anodes of the metal alloy materials. In this study, the BaCe 1-x Li x O 3 solid solutions with controlled contents of Li + ions (x = 0–0.8) were synthesized via combustion method and adopted them as the novel negative materials to offer a breakthrough in overcoming traditional performance constraints. The influences of Li + contents on microstructure and electrochemical hydrogen storage performance were systematically investigated. X-ray Diffraction test (XRD) confirmed that the Li + ions were successfully incorporated into the BaCeO 3 lattice and substituted at the Ce 4+ sites. The grain sizes were gradually decreased from 73.5 nm (undoped) to 67.0 nm (Li 0.08 ). Scanning Electron Microscope (SEM) and Transmission Electron Microscope (TEM) results further supported the reduction of the grain sizes and proved that the Li + ions had doped into the lattice of the BaCeO 3 . Spectral tests showed that the Li + ions induced obvious changes in the lattice structures and the concentration of oxygen vacancies. Electrochemical hydrogen storage performance tests demonstrated that the discharge capacity of BaCe 0.96 Li 0.04 O 3 achieved 212.7 mAh/g, representing 95.1 % improvement over the undoped sample (109.0 mAh/g), along with higher charge retention. Kinetic analysis further confirmed the superior hydrogen storage kinetic behavior of the doped samples. These results fully proved that the doping of Li + ions can effectively enhance the hydrogen storage performances of BaCeO 3 materials.
研究领域:
材料科学
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电化学
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储能技术
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固体化学
✓ 已验证
DOI
高影响因子
Materials Science & Engineering C-Materials for Biological Applications
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2020
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IF 5.88
Jumin Yang,Shuai Liu,Zhanpeng Ye,Liandong Deng,Anjie Dong,Jianhua Zhang
Various nanoparticles as drug delivery system provide significant improvements in the cancer treatment. However, their clinical success remains elusive in large part due to their inability to overcome both systemic and tumor tissue barriers. The nanosystems with nanoproperty-transformability (surface, size, stability and target) hold great promise for achieving enhanced delivery efficacy. However, currently available systems that are mainly polymer-based assemblies usually suffer from the intrinsic drawbacks of poor stability, premature leakage and low drug loading as well as limited transformability. In this study, we designed a facile strategy to build a novel multi-transformable MSNs@GO nanosystem for efficient doxorubicin (DOX) loading and delivery. This novel nanosystem was well characterized and investigated in vitro. The results indicated that the MSNs@GO can realize a very high drug loading ability due to the large pore surface area of MSNs and the demonstrated donor-acceptor (boron‑nitrogen) coordination interactions between phenylboronic acid-containing nanocarriers and electron donor-containing DOX. More importantly, the novel nanocarriers can simultaneously achieve charge reversal, size reduction and ligand reemergence by shielding/deshielding transition via acid-cleavable dynamic boronate bonds under in vitro simulated acidic microenvironment of tumor tissues, opening a new avenue for improving delivery efficiency of chemotherapeutics.
研究领域:
纳米技术
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药学
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癌症研究
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药物递送系统
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Journal of Physical Chemistry C
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2018
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IF 4.484
Jialun Tang,Sheng Huang,Zhaohan Li,Huaibin Shen,Zhao Lv,Haizheng Zhong
In this work, we reported the morphology evolution (formation of voids & size reduction) of gradient-alloyed CdxZn1–xSeyS1–y@ZnS quantum dots under electron irradiation during transmission electron microscopy observation. By investigating the correlations between shell gradients and morphology evolution, the formation of voids can be explained by the continuous electron irradiation-induced atomic movement under interfacial strain. On the other hand, the size reduction can be attributed to the elastic scattering-enabled sputtering of surface atoms. The as-formed voids of CdxZn1–xSeyS1–y@ZnS quantum dots with CdS-rich cores are much larger than those of ZnSe-rich ones, and the sizes of voids decreased with the increasing of shell thickness. The comparison of the morphology evolution of CdxZn1–xSeyS1–y@ZnS core–shell quantum dots with different composition gradients demonstrated that the size and shape of as-formed voids illustrate the strain characteristics of shell gradient. This provides a guideline to understand the strain effects in gradient-alloyed core–shell quantum dots through transmission electron microscopy measurement. We believe the deep insights into gradient-alloyed CdxZn1–xSeyS1–y@ZnS core–shell quantum dots would push forward their optimization toward commercialized light-emitting technology.
研究领域:
材料科学
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纳米技术
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物理学
✓ 已验证
DOI
高影响因子
ENVIRONMENTAL RESEARCH
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2021
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IF 6.498
Junning Wang,Yujie Zhou,Minqian Zeng,Yanhong Zhao,Xiaoxin Zuo,Fanrong Meng,Fang Lv,Yu Lu
Recently, metal-organic frameworks (MOFs) have great potential as an emerging peroxide-mimicking enzyme, and the improvement of its enzyme-like activity is desired. There are few studies on improving the peroxidase-like activity of MOFs by using the strategy of size reduction. Moreover, it is challenging to enhance the activity of Zr-based MOFs with peroxidase-mimicking activity by size reduction strategy. In this work, the synthesis of Zr-based MOFs capped with polyvinylpyrrolidone (Zr-MOF-PVP) was firstly reported to reduce crystal size of peroxidase-mimicking enzyme for enhanced catalytic activity . Using the 3,3′,5,5′-Tetramethylbenzidine (TMB) as substrate, the synthesized Zr-MOF-PVP nanocomposites with nanosize (about 45 nm) possessed obviously enhanced peroxidase-like activity compared with the pristine Zr-MOF. Based on the above, the Zr-MOF-PVP was also successfully applied in constructing colorimetric detection. By using hydrogen peroxide (H 2 O 2 ) and phenol as the model analytes, the satisfactory detection performance was obtained, indicating that the proposed method had an attractive application prospect in the field of peroxidase-related detection. Besides, this work also provided a new perspective for improving the catalytic activity of nanozymes.
研究领域:
材料科学
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纳米技术
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分析化学
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生物化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
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2024
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IF 13.3
Chong Yao,Jiwei Wu,Limei Pan,Lu Yu,Jie Luo,Jinjin Shan,Jie Liu,Chunshan Lu,Feng Feng,Xiaoliang Xu,Lili Lin,Yuxue Yue,Qingtao Wang,Jia Zhao,Qunfeng Zhang,Xiaonian Li
N-doped carbon materials were synthesized using a straightforward salt template method for Pt metal modification, resulting in a reduction in particle size from 4.8 nm to 2.1 nm due to the interaction between Pt and the carrier. The hydrogenation activity of nitrobenzene increased by 4.5 times compared to undoped catalysts. Additionally, the electronic effects of N and Pt enhanced the selectivity of p-aminophenol by up to 20.4 %. The anchoring of Pt by N improved the stability of active metal centers in a strong acidic system, thereby retarding Pt loss. Theoretical calculations and characterization revealed that the enhancement of activity relied on the high dispersion of Pt, while the improvement in product selectivity was associated with changes in the adsorption strength of the phenylhydroxylamine intermediate. N anchoring of Pt, inducing an electron effect, disentangled the activity and selectivity of nitrobenzene hydrogenation for the preparation of p-aminophenol.
研究领域:
催化
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材料科学
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化学工程
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）