CERAMICS INTERNATIONAL
·
2017
·
IF 2.986
Yajuan Sun,Jingkui Qu,Qiang Guo,Jing Song,Guangye Wei,Xinguo Xi,Guihua Hou,Tao Qi
Zirconia fiber, with its resistance to ultra-high temperature, is irreplaceable in many applications. Herein, a technique combining the sol-gel method and electrospinning was used to fabricate uniform 1D zirconia nanofibers from zirconium polyacetate. A suitable heat treatment process was established, and the effects of spinning parameters and additives on the fiber morphology were investigated using XRD, SEM, TGA , and FTIR. The results showed that addition of silica effectively inhibited grain growth and reduced the grain size to 30–60 nm. By optimizing the electrospinning parameters and the sintering process , fine-grained tetragonal zirconia fibers of 400–700 nm diameter could be produced.
研究领域:
材料科学
·
纳米技术
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DOI
高影响因子
ACTA MATERIALIA
·
2021
·
IF 8.203
Xuejia Wang,Ting Su,Yunan Luo,Lijun Quan,Linping Zhong,Ruizhi Li,Ting Zhou,Mengjiao Liu,Yan Zhao,Xin Lai,Jian Bi,Daojiang Gao
Regarded as a promising anode material, CoMoO 4 can reveal higher theoretical capacity (980 mAh g −1 ) in the context of completely reversible electrochemical reaction. Unfortunately, the large volume expansion, low conductivity and inferior cyclic stability are non-negligible, which have greatly limited its further development and application. Herein, a series of CoMo 1- x Si x /2 O 4-2 x ( x = 0, 0.1, 0.15, 0.2 and 0.25) anode materials have been successfully synthesized through a solid-state method. This heterovalent atom doped strategy can not only provide cationic vacancy (Mo vacancy) but also generate anionic vacancy (O vacancy). The results demonstrate that all the Si doped CoMoO 4 samples exhibit superior electrochemical performances than that of the pure CoMoO 4 although the produce of the dual vacancies has negligible influence on the microstructures of CoMoO 4 , which should be attributed to the synergistic effect of the Mo vacancy and O vacancy and thus leading to the lower optical band gap, the enhanced conductivity and the faster transport of lithium ions and electron. Particularly, when the content of Si-doping is set as 0.05, the obtained CoMo 0.9 Si 0.05 O 3.8 sample displays the highest capacity (847.4 mAh g −1 ) up to 300 cycles at a current density of 200 mA g −1 . This work paves an effective strategy for constructing dual vacancies to promote the electrochemical performance of transition metal oxide anode materials.
研究领域:
材料科学
·
能源存储与转换
✓ 已验证
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2021
·
IF 6.707
Beirong Liang,Sisi Zhu,Jingchu Wang,Xianqing Liang,Haifu Huang,Dan Huang,Wenzheng Zhou,Shuaikai Xu,Jin Guo
Developing low-cost and high-capacity anode materials is one of the momentous issues in lithium-ion batteries (LIBs). In this study, we propose a facile one-pot hydrothermal strategy to synthesize silicon-doped FeOOH@reduced graphene oxide (Si-FeOOH@rGO) composites, which integrate the advantages of hybridization and doping engineering as novel anodes for LIBs. The Si-FeOOH nanorods are uniformly grown on the conductive rGO sheets with the formation of Fe−O−C bonding at interfaces. Results demonstrate that the doping of Si can effectively suppress the aggregation of active nanoparticles, facilitate Li + diffusion, and promote the conversion reaction of FeOOH. As a result, the optimized Si-FeOOH@rGO composite manifests high reversibility (1370.5 mAh g −1 at 0.1 A g −1 over 200 cycles), outstanding rate capability (690.4 mAh g −1 at 1 A g −1 , 599.2 mAh g −1 at 2 A g −1 ) and excellent long-term cyclability (920.1 mAh g −1 at 0.5 A g −1 and 612.7 mAh g −1 at 1 A g −1 after 380 cycles). The simple fabrication strategy and superior electrochemical performance indicate that this novel Si-FeOOH@rGO composite shows a great application prospect as anode material for advanced LIBs.
研究领域:
材料科学
·
能源存储
✓ 已验证
DOI
高影响因子
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
·
2022
·
IF 4.831
Jia-Man Liang,Fang Zhang,Yu-Lin Zhu,Xiao-Yan Deng,Xian-Ping Chen,Qiu-Ju Zhou,Ke-Jun Tan
Here, the high fluorescent silicon-doped carbon quantum dots (Si-CQDs) were prepared by a facile and one-pot hydrothermal assay using 3-aminopropyltrimethoxysilane as the carbon and silicon source. The prepared Si-CQDs exhibit favorable water-soluble, high-temperature resistance, acid resistance, alkali resistance, high ionic strength resistance, high photostability, film-forming ability and solid-state fluorescence. Compared to other Si-CQDs that have been reported, the prepared Si-CQDs show unique up-conversion fluorescence. Furthermore, it is found that berberine hydrochloride (BH) can effectively quench the down- and up-conversion fluorescence of the Si-CQDs, making it can be used as a highly sensitive and specific probe for BH dual-mode sensing. Meanwhile, the linear range of down-conversion fluorescence detection for BH is 0.5-30.0 µmol/L with a limit of detection (LOD) of 50 nmol/L, and the linear range of up-conversion fluorescence assay for BH is 0-25.0 µmol/L. The mechanism of down-conversion fluorescence quenching by BH was investigated through a series of studies. The results show the quenching mechanism is the inner filter effect (IFE). Moreover, this proposed strategy has been well used to analyze BH in urine samples with satisfactory results.
研究领域:
材料科学
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分析化学
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药物分析
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产品关联
DOI
PubMed
高影响因子
ACS Applied Materials & Interfaces
·
2020
·
IF 8.758
Jun Zhang,Lujie Li,Chao Zheng,Yang Xia,Yongping Gan,Hui Huang,Chu Liang,Xinping He,Xinyong Tao,Wenkui Zhang
Argyrodite-type sulfide solid electrolytes (SEs) Li6PS5X (X = Cl, Br, I) have attracted considerable interest lately by providing a promising lithium-ion transport capability for its application in all-solid-state lithium batteries (ASSLBs). However, other than Li6PS5Cl and Li6PS5Br, Li6PS5I shows poor ionic conductivity of 10–7 S cm–1, which is originated from the I–/S2– site ordered arrangement in its structure. Herein, we report a silicon-doped solid electrolyte Li6+xP1–xSixS5I in this sulfide class, which can remarkably increase the conductivity to 1.1 × 10–3 S cm–1 and lower the activation energy to 0.19 eV as a consequence of changing the structural unit in the argyrodite network. The Li6+xP1–xSixS5I solid electrolytes are employed in ASSLBs with Li(Ni0.8Mn0.1Co0.1)O2 (NCM-811) as cathode and Li metal as an anode to evaluate the electrochemical performance. With x = 0.55, the battery displays an initial discharge capacity of 105 mA h g–1 at a rate of 0.05C and achieves high Coulombic efficiency. Moreover, chemical reactions occurring on the interfaces of the NCM/SE and Li/SE in regard to the degradation of cell performance are also investigated.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
PubMed
高影响因子
Gels
·
2024
·Vol. 10
·期 5
·285
·
IF 5
Zhengdong Zhao,Yichang Jing,Yuan Shen,Yang Liu,Jiaqi Wang,Mingjian Ma,Jiangbo Pan,Di Wang,Chengyu Wang,Jian Li
The excessive emission of iron will pollute the environment and harm human health, so the fluorescence detection and adsorption of Fe3+are of great significance. In the field of water treatment, cellulose-based gels have attracted wide attention due to their excellent properties and environmental friendliness. If carbon dots are used as a crosslinking agent to form a gel with cellulose, it can not only improve mechanical properties but also show good biocompatibility, reactivity, and fluorescence properties. In this study, silicon-doped carbon dots/carboxymethyl cellulose gel (DCG) was successfully prepared by chemically crosslinking biomass-derived silicon-doped carbon dots with carboxymethyl cellulose. The abundant crosslinking points endow the gel with excellent mechanical properties, with a compressive strength reaching 294 kPa. In the experiment on adsorbing Fe3+, the theoretical adsorption capacity reached 125.30 mg/g. The introduction of silicon-doped carbon dots confers the gel with excellent fluorescence properties and a good selective response to Fe3+. It exhibits a good linear relationship within the concentration range of 0–100 mg/L, with a detection limit of 0.6595 mg/L. DCG appears to be a good application prospect in the adsorption and detection of Fe3+.
研究领域:
环境科学
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材料科学
·
化学
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产品关联
DOI
PubMed
高影响因子
Materials Today Bio
·
2024
·
IF 8.7
Teliang Lu,Guohao Li,Luhui Zhang,Xinyuan Yuan,Tingting Wu,Jiandong Ye
Biphasic calcium phosphate (BCP) ceramics are valued for their osteoconductive properties but have limited osteogenic and angiogenic activities, which restricts their clinical utility in bone defect repair. Silicon doping has emerged as an effective strategy to enhance these biological functions of BCP. However, the biological impact of BCP is influenced by the level of silicon doping, necessitating determination of the optimal concentration to maximize efficacy in bone repair. This study investigated the effects of silicon doping on both the physicochemical and biological properties of BCP, with a specific focus on osteogenic and angiogenic potentials. Results indicated that silicon doping exceeding 4 mol.% led to the formation of α-TCP, accelerating BCP degradation, enhancing silicon ion release, and promoting mineralization product formation. Simultaneously, silicon doping increased the porosity of BCP scaffolds, which typically reduces their compressive strength. Nevertheless, scaffolds doped with ≤4 mol.% silicon maintained compressive strengths exceeding 2 MPa. In vitro biological experiments indicated that higher levels of silicon doping (≥6 mol.%) partially inhibited the successful differentiation of stem cells and the vascularization of endothelial cells. Optimal conditions for promoting osteogenic differentiation and angiogenesis were identified between 2 and 4 mol.% silicon doping, with an optimal level of approximately 4 mol.%. Subsequent in vivo experiments confirmed that BCP scaffolds doped with 4 mol.% silicon effectively promoted vascularization and new bone formation, highlighting their potential for clinical bone defect repair.
研究领域:
材料科学
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生物医学工程
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组织工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
TALANTA
·
2024
·
IF 5.6
Yuanting Chen,Linlin Xu,Sheng Zhao,Chenfang Miao,Yuyuan Chen,Zhenzhen Wang,Feng Feng,Mingrui Lin,Shaohuang Weng
Developing water-soluble nanomaterials with high photoluminescence emission and high yield for biological analysis and imaging is urgently needed. Herein, water-soluble blue emitting silicon and nitrogen co-doped carbon dots (abbreviated as Si-CDs) of a high photoluminescence quantum yield of 80 % were effectively prepared with high yield rate (59.1 %) via one-step hydrothermal treatment of N-[3-(trimethoxysilyl)propyl]ethylenediamine (DAMO) and trans -aconitic acid. Furthermore, the Si-CDs demonstrate environmental robustness, photo-stability and biocompatibility. Given the importance of the potentially abnormal levels of acid phosphatase (ACP) in cancer diagnosis, developing a reliable and sensitive ACP measurement method is of significance for clinical research. The Si-CDs unexpectedly promote the catalytic oxidation of ACP on dopamine (DA) to polydopamine under acidic conditions through the produced reactive oxygen species (ROS). Correspondingly, a fluorescence response strategy using Si-CDs as the dual functions of probes and promoting enzyme activity of ACP on catalyzing DA was constructed to sensitively determine ACP. The quantitative analysis of ACP displayed a linear range of 0.1–60 U/L with a detection limit of 0.056 U/L. The accurate detection of ACP was successfully achieved in human serum through recovery tests. As a satisfactory fluorescent probe , Si-CDs were successfully applied to fluorescent imaging of A549 cells in cytoplasmic with long-term and safe staining. The Si-CDs have the dual properties of outstanding fluorescent probes and auxiliary oxidase activity, indicating their great potential in multifunctional applications.
研究领域:
生物化学
·
医学诊断
·
纳米材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Research
·
2023
·
IF 11
Changsheng Cao,Shenghua Zhou,Shouwei Zuo,Huabin Zhang,Bo Chen,Junheng Huang,Xin-Tao Wu,Qiang Xu,Qi-Long Zhu
Transition metal-based single-atom catalysts (TM-SACs) are promising alternatives to Au- and Ag-based electrocatalysts for CO production through CO2 reduction reaction. However, developing TM-SACs with high activity and selectivity at low overpotentials is challenging. Herein, a novel Fe-based SAC with Si doping (Fe-N-C-Si) was prepared, which shows a record-high electrocatalytic performance toward the CO2-to-CO conversion with exceptional current density (>350.0 mA cm−2) and ~100% Faradaic efficiency (FE) at the overpotential of <400 mV, far superior to the reported Fe-based SACs. Further assembling Fe-N-C-Si as the cathode in a rechargeable Zn-CO2 battery delivers an outstanding performance with a maximal power density of 2.44 mW cm−2 at an output voltage of 0.30 V, as well as high cycling stability and FE (>90%) for CO production. Experimental combined with theoretical analysis unraveled that the nearby Si dopants in the form of Si-C/N bonds modulate the electronic structure of the atomic Fe sites in Fe-N-C-Si to markedly accelerate the key pathway involving *CO intermediate desorption, inhibiting the poisoning of the Fe sites under high CO coverage and thus boosting the CO2RR performance. This work provides an efficient strategy to tune the adsorption/desorption behaviors of intermediates on single-atom sites to improve their electrocatalytic performance.
研究领域:
材料科学
·
电化学
·
催化反应
✓ 已验证
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2025
·
IF 9.7
Liuyang Zhao,Zian Huang,Shenao Ma,Hongfu Tang,Ruixue Tian,Hao Huang,Aimin Wu,Aikui Li,Guozhong Cao
The exceptional capacity of lithium-rich manganese-based oxides (LRMO) primarily originates from the reversible oxygen redox process. Nevertheless, long-term cycling inevitably induces lattice oxygen instability, which remains a critical challenge for the practical application of LRMO. Doping with the oxygen-affinity element silicon (Si) has been identified as a promising strategy for stabilizing lattice oxygen due to the strong Si-O covalent bonds and small ionic radii. The incorporation of robust Si-O covalent bonds and the negative charge on oxygen atoms induced reduction of transition metal slabs intralayer and expansion of transition metal slabs interlayer, thereby fixing lattice oxygen and facilitating the transport of lithium ions in the Li 1.2 Mn 0.53 Co 0.13 Ni 0.13 Si 0.01 O 2 cathode material. Theoretical calculations further demonstrate that the Si substitution strategy substantially increases the formation energy of oxygen vacancies and effectively minimizes lattice oxygen loss under high-voltage conditions (≥ 4.8 V). These findings elucidate the critical role of oxygen-affinity elements with small ionic radii in regulating intralayer/interlayer spatial variations, thereby stabilizing lattice oxygen in high-energy–density electrode materials.
研究领域:
材料科学
·
电化学
·
理论计算
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Laser & Photonics Reviews
·
2025
·Vol. 19
·期 12
·2500026
·
IF 10
Yeping Ge,Ming Zhao,Yifei Zhao,Xinping Zhang
Filling the cyan gap (470–500 nm) in white light-emitting diodes (WLEDs) is crucial for full-spectrum illumination. However, the traditional approach of adding cyan phosphor to red, green, and blue phosphors can lead to reabsorption and color aberrations due to spectral overlap and varying degradation rates among the mixed phosphors. Herein, a blue-cyan-emitting phosphor (λ em = 475 nm) is developed through Si 4+ -P 5+ heterovalent substitution in blue-violet-emitting Rb 3 Y(PO 4 ) 2 :Eu 2+ phosphor (λ em = 425 nm), which can serve as the blue component in WLEDs to fill the cyan gap without adding extra phosphor. Initially, Eu 2+ primarily occupy the Rb2O 12 sites (426 nm) in Rb 3 Y(PO 4 ) 2 :Eu 2+ , with minimal occupation in the Rb1O 7 sites (456 nm) and YO 6 sites (522 nm). The Si 4+ -P 5+ substitution results in a red-shift of the Eu 2+ @Rb1 emission peak from 456 to 475 nm and the preferred occupation of the Rb1 sites by Eu 2+ , synergistically achieving the blue-cyan luminescence. Employing the blue-cyan-emitting phosphor instead of the blue-violet-emitting phosphor in WLEDs significantly improves the color rendering index from 90 to 97.2, thus enhancing the overall color reproduction quality. This research demonstrates a facile composition modification method to modulate the properties of inorganic luminescent materials and provides an alternative solution for full-spectrum healthy lighting.
研究领域:
材料科学
·
发光材料
·
固态照明
·
无机化学
·
光电子学
✓ 已验证
产品关联
DOI
高影响因子
Journal of Materials Chemistry A
·
2024
·Vol. 12
·期 10
·6038-6049
·
IF 10.7
Yaqi Hu,Zongliang Zhang,Siliang Liu,Fangbo He,Yang Liu,Zhi Zhuang,Fangyang Liu
High-capacity lithium-rich sulfide cathodes with superior conductivity over S or Li2S materials are considered for all-solid-state lithium-ion batteries (ASSLBs), yet their capacity and rate performance require further improvement. In this work, lithium-rich sulfide cathodes Li2Ti1−xSixS3 with a disordered rocksalt structure and layered structure are synthesized by high-energy ball milling and high-temperature annealing, respectively. The Si doping strategy is implemented to tune the microstructure of the lithium-rich sulfide cathode and to obtain high capacity and improved ionic conductivity. The partial replacement of Ti with Si increases the cationic disorder of rocksalt and layered Li2Ti1−xSixS3, which further activates the anionic redox activity to enable a higher capacity than Li2TiS3. Moreover, the robust Si–S bonds induce distortions in the LiS6 octahedral and adjacent tetrahedral vacancies, broadening the Li+ migration channels in the Li+ percolation network and enabling rapid Li+ migration capability. The optimized rocksalt Li2Ti1−xSixS3 exhibits a higher specific capacity of 361 mA h g−1 than rocksalt Li2TiS3 (295 mA h g−1) at 0.3 C (120 mA g−1), while the layered Li2Ti1−xSixS3 has a higher capacity of 260 mA h g−1 than the layered Li2TiS3 (140 mA h g−1) at 0.3 C. An argyrodite-type sulfide solid-state electrolyte Li5.25PS4.25ClBr0.75 with high Li+ conductivity (7.64 mS cm−1) is designed to match with the rocksalt Li2Ti1−xSixS3 cathode, and the assembled ASSLB achieves a high areal capacity density of 9.79 mA h cm−2. The Si doping to tune the disordered structure provides an effective improvement approach for high-capacity rocksalt or layered sulfide cathodes and high-energy density ASSLBs.
研究领域:
材料科学
·
能源技术
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）