ACS Catalysis
·
2024
·
IF 11.3
Mengjie Zhou,Shuo Xu,Wenjie Zhang,Ge Shi,Yanjie He,Xiaoguang Qiao,Xinchang Pang
To provide some insights into the relationship between carbon dots’ optical properties and their photocatalytic ability, a series of silicon-doped carbon dots (SiCDs) featuring varying photoluminescence quantum yields (PLQYs) from 11.2 to 75.6% were synthesized, characterized, and employed in polymerization processes. The as-prepared samples exhibited varied structural and optical attributes and resulted in different reaction rates when utilized as cocatalysts for copper-catalyzed photoinduced atom transfer radical polymerization (photoATRP). Comparing the measured density of states, it was found that band gap reduction enhanced the photocatalytic capability of SiCDs. Besides, a negative correlation between the PLQY and polymerization rate was observed, while the latter saw a positive relationship with the nonradiative recombination rate. Both the doping effect and size effect account for the varied efficiency of photoreducing CuII to CuI complexes by SiCDs, thus resulting in variation in the reaction rate. The selected optimal SiCD was further investigated through kinetic study, on–off, and chain extension experiments to prove its feasibility on the aqueous photoATRP system. Remarkably, the SiCD-photocatalyzed approach exhibited an oxygen-tolerant feature and rapid reaction rate, allowing for 3D fabrication of complex structures with high precision and resolution.
研究领域:
材料科学
·
光化学
✓ 已验证
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
·
2025
·
IF 14.3
Peng Chen,Zeping Chen,Daxiang Xue,Dongliang Liu,Wenhuai Li,Wanqing Chen,Qiang Niu,Meigui Xu,Wei Wang,Chuan Zhou,Wei Zhou
Protonic ceramic cells (PCCs) are recognized as a promising energy conversion technology for green hydrogen and electricity production owing to their high efficiency, all-solid-state structure, and exceptional reversibility. However, the inadequate mechanical strength of proton-conducting electrolytes remains a critical challenge hindering the widespread application of PCCs. In this study, a cation regulation strategy is employed to enhance the electrolyte mechanical strength by doping silicon (Si) at the B-site of the conventional proton-conducting material BaZr 0.1 Ce 0.7 Y 0.1 Yb 0.1 O 3 − δ (BZCYYb). The optimized Ba(Zr 0.1 Ce 0.7 Y 0.1 Yb 0.1 ) 0.99 Si 0.01 O 3 − δ (BZCYYbSi) demonstrates significantly improved grain boundary conductivity, structural stability, and mechanical strength, achieving a hardness of 3.11 GPa—1.5 times greater than that of pristine BZCYYb (1.14 GPa). The PCC incorporating a thin-film BZCYYbSi electrolyte exhibits a peak power density of 1.179 W cm −2 at 600 °C in fuel cell mode and an electrolysis current density of 1.591 A cm −2 at 1.3 V/600 °C, outperforming the BZCYYb-based counterpart (0.994 W cm −2 and 1.244 A cm −2 ). Additionally, the BZCYYbSi-based PCC maintains a stable operation for over 370 h at 550 °C in a continuous discharge and electrolysis situation. This work provides new insights for the design and fabrication of mechanically strengthened and high-performance electrolytes for low-temperature PCCs.
研究领域:
材料科学
·
固态离子学
·
能源材料
·
电化学
·
陶瓷工程
·
氢能技术
✓ 已验证
产品关联
DOI
高影响因子
Journal of Environmental Chemical Engineering
·
2025
·
IF 7.2
Hongwei Ren,Liang Han,Qing Li,Xiaoyun Liu,Xiaoyu Huang,Luyu Jia,Zhaoxiong Huang,Jinfeng Zhang
As a widely utilized adsorbent for volatile organic compounds (VOCs) from industrial waste gases, activated carbon (AC) poses a risk of fire due to its tendency of spontaneous combustion under oxidizing conditions. The introduction of carbon quantum dots (CQDs) into AC via immersion method can improve its thermal stability thus reducing the fire risk. Meanwhile, it can further enhance its VOCs adsorption performance. The Si-doped CQDs modified AC was synthesized and characterized using TEM, FT-IR, and XRD. After modification, a significant presence of crystalline structures and compact structures were observed on the surface of AC, resulting in increased intermolecular forces and suppressed thermal decomposition of AC. The natural tendency and thermal safety of modified AC were studied by thermal analysis. The spontaneous combustion results showed that after toluene adsorption, the autoignition temperature of Si-doped CQDs modified AC was 59.7 ℃, much higher than that of AC. The activation energy increased from 31.90 kJ·mol −1 to 69.97 kJ·mol −1 . The relative fire safety factor of Si-doped CQDs modified AC was 1.3, superior to unmodified AC, significantly reducing the thermal safety risk. The thermal investigation during the toluene adsorption of AC were studied by μRC. The study showed that the heat released by the modified AC at different temperatures was significantly lower than the unmodified AC. The Si-doped CQDs modified AC effectively increased the thermal stability of the AC and significantly reduced the propensity for fire hazard of VOCs adsorption by AC.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF POWER SOURCES
·
2019
·
IF 7.467
Dandan Li,Xiaoxiao Ji,Xianjing Gong,Fangchang Tsai,Qunchao Zhang,Li Yao,Tao Jiang,Robert K.Y. Li,Hengchong Shi,Shifang Luan,Dean Shi
Si doped-poly(ethylene glycol) ( Si-PEG) hybrid polymer electrolyte with Si O C bonds in the main chain obtains high ionic conductivity even at room temperature because of the more flexible molecule chains. In this work, poly(ethylene glycol)-borate ester (B-PEG) is further covalent bonded into the crosslinked Si-PEG network to form the hybrid solid polymer electrolyte (HSPE). Comparing to previous works in which B-PEG is just added as a plasticizer , the Lewis acidity of boron (B) in the network of polymer chains is less shielded by the connected PEG chains, which is more effective to improve lithium ion transference number ( t L i + ) and reduce the interfacial polarization of LiFePO 4 /HSPE/Li cells by attracting the anions of lithium salt . The t L i + increases monotonously along with the increase of B-PEG contents in HSPE, while the ion conductivity has a peak value. When B-PEG content is 23.1 wt%, the highest ionic conductivity of the hybrid polymer electrolyte reaches up to 1.6 × 10 −4 S/cm and t L i + is 0.68 at 25 °C. And the initial capacity of LiFePO 4 /HSPE/Li cells are 120 mAh/g and 90 mAh/g at 0.5C and 1C at 25 °C. After 100 cycles under 1C at 25 °C, the capacity retention of the LiFePO 4 /HSPE/Li cell is 84%, which is higher than that of 65% for LiFePO 4 /PSPE/Li cell. (PSPE indicates the Si-PEG polymer electrolytes with B-PEG just as plasticizer).
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
SURFACE & COATINGS TECHNOLOGY
·
2024
·
IF 5.3
Xue'e Zhang,Xu Zhang,Wuchao Zhou,MengZhen Tang,Tiebiao Wang,Ketong Le,Weihong Xi
As is generally known, the lack of osteoinductive properties in titanium scaffolds has been a major barrier to bone defects repair. In our previous studies, we found that silicon-doped porous coatings prepared via micro-arc oxidation (MAO) had the potential application of Si-doped coatings in dental and orthopedic fields. We are currently focused on developing more advanced surface coatings to maximize their osteoinductive efficacy. Bone morphogenetic protein-2 (BMP-2), known for its ability to induce bone and cartilage development, has also been extensively studied. Therefore, in this study, macroporous titanium alloy scaffolds were fabricated using 3D printing technology, silicon ions were introduced onto the surface of customized macroporous titanium alloy scaffolds through MAO to enhance the bioactivity of the scaffolds, and BMP-2 was loaded onto the Si-doped coating to further improve the osseointegration of the titanium alloy scaffolds post-implantation. Results demonstrated that silicon-doped coating-loaded BMP2-modified multi-level porous titanium scaffolds exhibited improved hydrophilicity and biocompatibility. In-vivo and vitro studies further confirmed the superior bone regeneration capabilities of these scaffolds. This study demonstrates an optional strategy to combine two surface modification treatments, offering substantial potential as an advanced bone defect repair material with improved and accelerated bone regeneration.
研究领域:
材料科学
·
生物医学工程
·
骨科
·
组织工程
✓ 已验证
DOI
高影响因子
Journal of Materials Chemistry B
·
2019
·Vol. 8
·期 5
·919-927
·
IF 5.047
Minghui Zan,Cong Li,Daoming Zhu,Lang Rao,Qian-Fang Meng,Bei Chen,Wei Xie,Xingwang Qie,Li Li,Xiaojiao Zeng,Yirong Li,Wen-fei Dong,Wei Liu
Copper ions (Cu2+) and L-cysteine (L-Cys) in the human body always play critical roles in various physiological processes, while abnormal Cu2+ and L-Cys concentrations in the biological system lead to many diseases. In this manuscript, Si-doped carbon dots (Si-CDs) with near-infrared fluorescence were designed for the detection of Cu2+ and L-Cys through the fluorescence “on–off–on” mode. The carbon dots exhibited not only excellent optical merits including good stability against photobleaching and high chemical stability, but also superior biological compatibility. Interestingly, due to the abundant amino groups distributed on the surface of Si-CDs, they could bind to copper ions to form cupric amine complexes and then quench the fluorescence of Si-CDs due to an electron transfer process. In addition, upon the addition of L-Cys, the FL intensity of Si-CDs could be effectively recovered accompanied with complexation between Cu2+ and the functional groups in L-Cys, due to which Cu2+ was removed from the surface of Si-CDs. Notably, as far as we know, these are the first red-emitting carbon dots for copper ion and L-Cys assays in water samples and human plasma samples. Furthermore, this strategy was successfully applied to the determination of Cu2+ and L-Cys in living systems, demonstrating great practicability in biomedical applications.
研究领域:
分析化学
·
生物医学工程
·
材料科学
✓ 已验证
DOI
PubMed
高影响因子
Advanced Energy Materials
·
2023
·Vol. 13
·期 9
·2203631
·
IF 27.8
Ruifeng Song,Jingming Yao,Ruonan Xu,Zhixuan Li,Xinlin Yan,Chuang Yu,Zhigao Huang,Long Zhang
A stable interface and preventing dendrite-growth are two crucial factors to realize long-life all-solid-state Li batteries (ASSLBs) using sulfide-based solid electrolytes (SEs) and Li metal anodes. But it remains a challenge to accomplish the two factors simultaneously. Here, an effective strategy is reported to realize this goal in Li-argyrodites via self-engineered metastable decomposition that is enabled by Si doping in Cl-rich argyrodites. It is shown that Cl atoms in the lattice become metastable and are highly reactive with Li atoms. The locally deposited/grown Li crystal nuclei are thus depleted by the metastable Cl during electrochemical cycling, in situ generating electrically insulated LiCl shells concentrated at the argyrodite grain boundaries. The shells in turn prevent the autochthonous Li redeposition and act as self-protective layers to restrain the continuous decomposition in the interior argyrodite, that is, self-assembly of reactive-cores-stable-shells to Li metal, thereby enabling an ultra-long life ASSLB using Li metal anodes at room temperature under relatively high current densities.
研究领域:
材料科学
·
电化学
·
电池技术
✓ 已验证
DOI
高影响因子
Food Analytical Methods
·
2025
·
IF 3
Hu Jianan,Hong Dilong,Zhang Huan,Jiang Yuliang
Tryptophan, an essential amino acid for the human body, plays a crucial role in various physiological processes, including protein synthesis, fatty acid metabolism, enhancing energy levels, and being converted into neurotransmitters to regulate sleep and mood. It is also used in the prevention and treatment of pellagra. However, excessive intake of tryptophan can cause adverse effects, so detecting its concentration is of great significance. In this paper a silicon-based carbon quantum dot (N,Si-CDs) tryptophan probe was prepared. The structure and composition of N,Si-CDs were characterized by TEM, FT-IR, and XPS. Fluorescence studies revealed that N,Si-CDs exhibited high selectivity for tryptophan with minimal interference from other substances. There was a good Linear relationship between the fluorescence intensity of N,Si-CDs and the concentration of tryptophan in the range of 5–25 μM, and the detection Limit was as low as 19 nM. N,Si-CDs were successfully applied to detect tryptophan in complex Matrices such as honey, Yili milk powder, water-soluble vitamin C, sour plum soup, and lemon tea, with recovery rates ranging from 81.3% to 106.4%. Cell experiments demonstrated that N,Si-CDs had low toxicity to T24 cells and could be used for live-cell imaging. This N,Si-CDs shows great potential in fields such as food safety, environmental monitoring, and biomedical research.
研究领域:
分析化学
·
纳米材料
·
生物传感器
·
食品安全
·
生物医学研究
·
环境监测
✓ 已验证
产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2025
·
IF 5.6
Chengyu Zhang,Jimin Chen
Bone tissue defects caused by trauma, aging, or tumors necessitate advanced regenerative strategies. This study investigates silica-doped hydroxyapatite (HAp) scaffolds with Gyroid triply periodic minimal surface (TPMS) structures fabricated via digital light processing (DLP), combined with femtosecond laser (FS) surface modification to enhance mechanical, bioactive, and antibacterial properties. Finite element analysis (FEA) and computational fluid dynamics (CFD) revealed that the Gyroid structure exhibited superior mechanical isotropy (Zener ratio ≈ 1) and permeability (34.52×10 -9 m 2 ) compared to Schwarz and Fluorite lattices, facilitating efficient nutrient transport and cell migration. FS ablation induced hierarchical micro/nanostructures on silica-doped HAp (FSH), increasing surface area (121 ± 1.03 μm 2 ) and hydrophilicity (contact angle: 27.7°), which enhanced protein adsorption (88.0 ± 20.3 μg/mL) and osteoblast adhesion/proliferation. In vitro tests demonstrated FSH’s antibacterial efficacy against E. coli (82.83% inhibition) and robust bioactivity via hydroxyapatite layer formation in simulated body fluid. These findings highlight the potential of DLP-printed Gyroid scaffolds with FS-modified surfaces as a promising platform for bone tissue engineering, offering tailored mechanical properties, enhanced mass transfer, and multifunctional biological responses.
研究领域:
生物材料学
·
骨组织工程
·
增材制造
·
表面改性
·
生物力学
·
计算流体力学
·
分子生物学
·
转化医学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2021
·
IF 8.128
Xuejiao Tao,Yuman Zhou,Kun Qi,Chaozhong Guo,Yunling Dai,Jianxin He,Zhao Dai
Flexible triboelectric generators present a wide range of prospective applications owing to their small size, light weight, and wearability; in addition, they can convert external mechanical energy into electrical energy to provide an energy supply for wearable electronic products. In this study, a wearable textile triboelectric generator was developed by weaving polyurethane (PU) nanofiber core-spun yarn and Si 3 N 4 -electret-doped polyvinylidene fluoride (PVDF) nanofiber core-spun yarn into a double-layer fabric. Within the double-layer fabric, one layer was Si 3 N 4 -doped PVDF (denoted as Si 3 N 4 @PVDF) nanofiber fabric, and the other was PU nanofiber fabric. When subjected to an external mechanical force, PU nanofiber fabric and Si 3 N 4 @PVDF nanofiber fabric came into contact and were able to convert external mechanical energy into electrical energy. The most notable instantaneous electrical performance of this triboelectric nanogenerator was open circuit voltage of 71 V, short-circuit current of 0.7 μA, and output power of 56 μW. Additionally, the wearable textile triboelectric generator exhibited superior washability, stability, and cycle durability. More significantly, it was capable of driving some low-consumption electronic products, including capacitors, LED bulbs, and digital meters, thereby exhibiting a strong potential for flexible self-powered electronic devices and intelligent textiles .
研究领域:
纳米能源材料
·
智能纺织工程
·
柔性电子学
·
能量收集技术
·
可穿戴设备
✓ 已验证
DOI
高影响因子
RUSSIAN JOURNAL OF GENERAL CHEMISTRY
·
2022
·Vol. 92
·期 11
·2363-2369
·
IF 0.779
Zhou L. J.,Chi Y. T.,Chen L. S.,Pei S. C.,Chai S. Q.
Abstract Drug-resistant pathogens are seriously threatening global public health. It is urgent to discover new drugs that can effectively inhibit drug-resistant bacteria. Carbon quantum dots (CQDs), as a good antibacterial agent, have gained considerable interest due to their green synthesis method and low toxicity. In this work, the Si-doped CQDs with bright blue fluorescence are prepared by one-step hydrothermal method using glycyrrhizic acid and methyltrimethoxysilane. The average particle diameter of Si-doped CQD with emission at 420 nm is found to be 2.10 nm. The Si-doped CQDs exhibit a good antibacterial activity against Escherichia coli and Staphylococcus aureus with MIC of 1.25 mg/mL, but it does not show selectivity. Furthermore, the antibacterial mechanism of Si-doped CQDs suggest that Si-doped CQDs destroy the normal morphology of bacteria by generating 1 O 2 and enter the interior of bacteria to produce antibacterial effects. The present study provides a strategy for the preparation of CQDs from a medicinal plant with antibacterial activities against two common pathogens.
研究领域:
材料科学
·
纳米技术
·
生物医学工程
·
微生物学
✓ 已验证
DOI
高影响因子
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
·
2024
·
IF 4.1
Jingjing Chen,Zhixiang Li,Xiaoqi Li,Yingxiang Du
A fluorescence sensor was developed based on NH 2 -MIL-101(Fe) and silicon-doped carbon quantum dots for the analysis of copper ions. Copper ions enhanced the fluorescence intensity of doped silicon-carbon quantum dots and decreased the intensity of NH 2 -MIL-101(Fe). The addition of copper ions resulted in fluorescence resonance energy transfer, which caused a reverse change in the fluorescence signal. The sensor based on the above mechanism can eliminate false positive interference. The fluorescence sensing system had a remarkable linear range of 0.25–5 µM for copper ions and a detection limit of 11 nM. It was then applied to water samples, resulting in recoveries ranging from 95.43 % to 103.1 %. The successful construction of this optical sensor not only broadened the way to detect copper ions but also provided a new idea for the detection of other targets mediated by copper ions. Finally, an attempt was made to construct a smartphone-assisted colourimetric platforms to detect copper ions in daylight.
研究领域:
分析化学
·
环境科学
·
材料科学
·
纳米技术
✓ 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）