CHINESE JOURNAL OF CATALYSIS
·
2023
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IF 16.5
Zhuogen Li,Qadeer Ul Hassan,Weibin Zhang,Lujun Zhu,Jianzhi Gao,Xianjin Shi,Yu Huang,Peng Liu,Gangqiang Zhu
The H 2 evolution is generally considered a competing reaction in photocatalytic CO 2 reduction reaction (CO 2 RR) using H 2 O as the proton source. However, the reducing gas H 2 generated from H 2 O splitting can be the proton source in CO 2 RR under the enhanced dynamic role of the thermal effect. The reverse water gas shift (RWGS) reaction, a CO 2 hydrogenation reaction, should occur in photothermal environment owing to thermodynamically and kinetically favorable. Herein, nanostructured metal-semiconductor contact consisting of Pt nanoparticles (NPs) supported on SrTiO 3– δ nanosheets with rich oxygen vacancies (Pt-OVs-STO) was constructed for investigating its feasibility and efficiency in the RWGS reaction under photothermal effect. Our experimental results substantiate that the H 2 generated by H 2 O splitting effectively contributes to the RWGS reaction over Pt-OVs-STO system. The Pt 0 NPs not only efficiently facilitate surface charge transfer, but also lower the energy barrier of the O–H bond breaking, H 2 releasing, and RWGS reaction, thereby showing an outstanding CO 2 RR performance. The strong interaction between the Pt 0 NPs and SrTiO 3– δ has been extensively demonstrated by a series of experimental characterizations and density functional theory calculations. This work elucidates the relation between H 2 evolution and RWGS reaction over Pt 0 /SrTiO 3– δ structure in photothermal catalytic CO 2 RR using H 2 O as the proton source and provides new perspectives for subsequent CO 2 RR.
研究领域:
材料科学
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催化化学
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环境科学
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DOI
高影响因子
Journal of Materials Chemistry A
·
2025
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IF 9.5
Li Gan,Ying Liu,Xiaojiao Yang,Wanxia Huang,Ningjia Yang,Yibo Niu,Xin Tian
Silver nanowires transparent conductive film (AgNWs TCF), prized for its optoelectronic properties and flexibility, faces challenges in outdoor, automotive, and UV-exposed environments due to silver oxidation and migration. Modifications to the over-coating layer (OCL) have been explored to enhance performance, but achieving long-term stability remains difficult. Strontium vanadate (SrVO3, SVO) exhibits excellent conductivity, offers a wider coverage of transparency window in near UV region, and possesses strong anti-oxidation and UV resistance. In this study, SVO nanofibers are employed as modification reagents in the OCL to encapsulate the AgNWs network conductive layer (ANCL). The results reveal that the incorporation of 0.010 wt.% of high-conductivity, high-UV-transparency SVO nanofibers into OCL leads to notable enhancements: a 7.40% reduction in sheet resistance (Rs), a 4.85% decrease in haze (H), and virtually no change in light transmittance at 550 nm (Tvis). Significantly, this structure demonstrates optical stability for more than 500 hours, far outperforming both commercial and unmodified samples. Following prolonged UV exposure, the Rs of the SrVO3-modified silver nanowires transparent conductive film (AgNWs/SVO TCF) increases by just 48.10% to 46.17 Ω·sq-1, with only minor reductions in Tvis and H of -1.76% and -1.17%, respectively. In stark contrast, the Rs of the unmodified and commercial AgNWs TCF increase dramatically by 235.30% to 112.33 Ω·sq-1 and 616.7% to 258.00 Ω·sq-1, respectively. AgNWs/SVO TCF demonstrates superior optical stability. This method is fully compatible with established processes for preparing AgNWs TCF, and offers promising opportunities and innovative approaches to enhance the optoelectronic performance and optical stability of AgNWs TCF. Additionally, it provides valuable insights for engineering AgNWs TCF specifically for outdoor applications.
研究领域:
材料科学
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光学工程
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纳米技术
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DOI
高影响因子
MATERIALS SCIENCE IN SEMICONDUCTOR PROCESSING
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2025
·
IF 4.6
Wakeel Ahmad,Faten Al-Hazmi,Faris Alfifi,Muneerah Alomar,Majed Y. Awaji,Sohail Mumtaz,Mohammad Ehtisham Khan,Mohd Imran,Mehraj-ud-din Naik,Muhammad Shahid Rashid
Although transition metal oxides (TMOs) were extensively investigated as electrodes materials in supercapacitor devices, their higher pricing and availability constraints prevent for wide spread uses. In contrast, alkaline earth metal oxides like SrO are typically unnoticed for energy storage applications, despite their cost-effectiveness, natural abundance, chemical stability, and naturally promising properties. In order to fill this gap, we present the preparation of pure SrO and its composites with carbon nanotubes (SrO/CNT-25 and SrO/CNT-50) by hydrothermal method, and studied the effect of incorporating CNTs into a SrO framework to improve the capacity of energy storage systems (ESSs). The structural, morphological, and compositional studies of prepared were investigate using XRD, SEM, and XPS analysis respectively. The electrochemical activity is assessed using a three-electrode setup, demonstrating that the SrO/CNT-25 composite possesses a superior specific capacitance of 226.55 F/g and a prolonged maximum discharge time compared to SrO and SrO/CNT-50. The SrO/CNT-25 demonstrated good capacitive contributions (32.2 %) and diffusive contribution (65.8 %) at a scan rate of 125 mV/s. Moreover, Asymmetric supercapacitor (ASSC) was fabricated by active materials (SrO/CNT-25) and activated carbon which employ as the positive and negative electrode accordingly. The ASSC device shows a specific capacity of 385 C/g, with energy density of 45.41 Wh/kg, power density of 7500 W/kg, capacity retention of 95.98 % and coulombic efficiency of 99.18 % after 3000 charging and discharging cycles. The present results represented the novelty of applying the SrO/CNTs-25//AC device for sustainable ESSs. The synergistic impact between SrO and CNTs enhances interfacial transfer of charge and electrochemical presentation that offering a sustainable and economical alternative to traditional TMO-based ESSs.
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高影响因子
COLLOIDS AND SURFACES B-BIOINTERFACES
·
2024
·
IF 5.4
Dongdong Zhang,Han Liu,Xiaodong Xue,Feihong Liu,Jun Wu,Feng Peng,Donghui Wang,Haobo Pan,Mei Li
Bone implantation inevitably causes damage to surrounding vasculature, resulting in a hypoxic microenvironment that hinders bone regeneration. Although titanium (Ti)-based devices are widely used as bone implants, their inherent bioinert surface leads to poor osteointegration. Herein, a strontium peroxide (SrO 2 )-decorated Ti implant, Ti_P@SrO 2 , was constructed through coating with poly-L-lactic acid (PLLA) to alleviate the hypoxic microenvironment and transform the bioinert surface of the implant into a bioactive surface. PLLA degradation resulted in an acidic microenvironment and the release of SrO 2 nanoparticles. The acidic microenvironment then accelerated the decomposition of SrO 2 , resulting in the release of O 2 and Sr ions. O 2 released from Ti_P@SrO 2 can alleviate the hypoxic microenvironment, thus enhancing cell proliferation in an O 2 -insufficient microenvironment. Furthermore, under hypoxic and normal microenvironments, Ti_P@SrO 2 enhanced alkaline phosphatase activity and bone-related gene expression in C3H10T1/2 cells with the continuous release of Sr ions. Meanwhile, Ti_P@SrO 2 suppressed M1 polarization and promoted M2 polarization of bone marrow-derived monocytes under hypoxic and normal conditions. Furthermore, in a rat implantation model, the implant enhanced new bone formation and improved osteointegration after modification with SrO 2 . In summary, the newly designed O 2 - and Sr ion-releasing Ti implants are promising for applications in bone defects.
研究领域:
生物医学工程
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材料科学
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骨科
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产品关联
DOI
PubMed
高影响因子
Journal of the Mechanical Behavior of Biomedical Materials
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2025
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IF 3.5
Song Fuxiang,Ze Lalai·A Di Li,Wang Zhili,Ling Yunxiao,Zhao Qianjuan,Liu Bin
The repair of critical bone defects resulting from trauma, infection, tumors, and congenital malformations poses significant clinical challenges. The combination of medical-grade polycaprolactone (PCL) and β-tricalcium phosphate (β-TCP) is widely investigated for developing synthetic bone graft substitutes, attracting considerable interest in regenerative medicine. However, the material's inherent lack of osteogenic capacity remains a bottleneck to its widespread clinical application. This study synthesized a strontium oxide (SrO)-functionalized three-dimensional (3D)-printed polycaprolactone (PCL)/β-tricalcium phosphate (β-TCP) composite scaffold. Gradient SrO-doped (0-2.0 wt %) 3D printed scaffolds (3D PTSr) were fabricated by melt blending and direct ink writing (DIW) technology, and their physicochemical and biological properties were systematically characterized. Scanning electron microscopy (SEM) showed that the 3D PTSr scaffold had a precisely regulated macroscopic pore structure (pore size ∼ 1 mm) and uniformly distributed Sr element. When the doping amount of SrO was 1.5 wt %, the scaffold exhibited the best comprehensive performance: the surface contact angle was reduced to 64.78°±0.54°, and the weight loss rate was 42.83±0.02% after 4 weeks of in vitro degradation. At the same time, it showed the sustained release characteristics of Sr 2+ for 56 days (cumulative release of 10.42 ppm). Mechanical tests showed that the compressive strength (5.64 ± 0.04 MPa) and tensile strength (2.75 ± 0.16 MPa) were significantly better than the control group (p < 0.05). In vitro biomimetic mineralization experiments confirmed that SrO functionalization facilitated dense calcium-phosphate composite layer formation. In vitro experiments demonstrated that the 3D PTSr1.5 scaffold significantly promoted the proliferation of MC3T3-E1 cells, and its osteogenic differentiation ability was verified by increasing alkaline phosphatase (ALP) activity and calcium nodule formation. Implantation of 3D PTSr1.5 scaffold into rat cranial defects significantly enhanced bone regeneration at 12 weeks versus controls. Histological analysis confirmed substantial regeneration of mature bone tissue and collagen fibers within the defect area. This study reveals the molecular mechanism of SrO functionalization promoting bone regeneration by regulating the synergistic effect of material degradation-ion release-topology, and provides a theoretical basis and technical reserve for the development of next-generation intelligent bone repair materials.
研究领域:
生物材料
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组织工程
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再生医学
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生物医学工程
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材料科学
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产品关联
DOI
PubMed
高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2024
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IF 3.8
Li Qin,Haifeng Yu,Hujun Zhang,Qilin Cheng,Ling Chen,Hao Jiang
All-dry solid-phase synthesis (ADSPS) is considered an eco-friendly and cost-effective method for preparing Ni-rich Co-poor cathodes, yet slow ion diffusion during the solid-phase sintering process results in agglomerate particles with severe Li/Ni mixing. Herein, a Mg/Sr-codoped and ZrO2-coated single-crystalline LiNi0.73Co0.05Mn0.22O2 cathode with a well-layered structure is fabricated through the ADSPS method. The Sr ions effectively accelerate the ion migration at the grain boundary to facilitate particle coarsening, while the Mg ions act as “pillar ions” to decrease the Li/Ni mixing and improve the structural stability. Moreover, the ZrO2 coating layer can further alleviate the interfacial side reactions to hinder the structure degradation and enhance the particle integrity. Therefore, the resultant single-crystalline cathodes deliver a high reversible capacity of 192.4 mAh g–1 and display an impressive retention of 87.5% after 300 cycles at 0.5 C in a pouch-type full cell. The ADSPS strategy in this work shows great potential for the synthesis of single-crystalline Ni-rich ternary cathodes for Li-ion batteries.
研究领域:
材料科学
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电化学
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产品关联
DOI
高影响因子
JOURNAL OF SOLID STATE CHEMISTRY
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2025
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IF 3.5
Wei Zhu,Jialing Zhou,Feifei Huang,Renguang Ye,Youjie Hua,Shiqing Xu
The color rendering index (CRI) of white light-emitting diodes (LEDs) is very important for lighting quality. Currently, high-CRI white LEDs are typically fabricated by combining multiple-color phosphors. Therefore, the realization of multipeak-emission phosphors in a single phosphor is valuable. The Sr 2 LiAlO 4 : Eu 2+ phosphor exhibits an obvious double-peak emission in the yellow-green spectral range and has excellent luminescence properties , suggesting its potential application in white LEDs. In this study, a series of Sr 2 LiAlO 4-1.5 x N x : Eu 2+ ( x = 0–0.7) phosphors were successfully synthesized by introducing N 3− ions to replace O 2− ions. The luminescence intensity was significantly enhanced by increasing the N 3− concentration. Upon reaching a concentration of 0.7, the intensity of the yellow emission exceeded that of the green emission, indicating a shift in emission color from green to yellow. The emission peak of the Sr 2 LiAlO 2.95 N 0.7 : Eu 2+ phosphor is at 568 nm, which exhibited broader yellow light emission. Finally, Sr 2 LiAlO 2.95 N 0.7 : Eu 2+ was fabricated with a CaAlSiN 3 : Eu 2+ red phosphor on 450 nm blue LED chips. The fabricated white LEDs was observed to be white light with a high CRI of 92.1 and an adjustable color temperature (4938-6665k), showing its potential application in white LEDs.
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高影响因子
CERAMICS INTERNATIONAL
·
2025
·Vol. 51
·期 25
·46135-46141
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IF 5.6
Haidong Yu,Shan Gao,Hongan Ma,Xiaopeng Jia
In oxide thermoelectrics, controlling phonon transport is crucial for reducing lattice thermal conductivity.In this work, we report the synthesis of a series of high-entropy perovskite ceramics with the composition (Sr 0.6 La 0.2 Ca 0.1 Eu 0.1 )(Ti 0.6- x Nb 0.2 Hf 0.1 Zr x )O 3 , using a combined high-pressure high-temperature (HPHT) and high-energy ball milling (HEBM) process. This multistep route constructs a hierarchical phonon scattering network from the atomic to nanoscale. We find that the sample with Zr content x = 0.09 exhibits the lowest lattice thermal conductivity of 0.89 W m −1 K −1 at 873 K, representing a substantial reduction compared to undoped SrTiO 3 . The suppression of thermal conductivity is attributed to synergistic phonon scattering mechanisms, including point-defect scattering from mass and bonding fluctuations, grain boundary scattering from nanoscale refinement, and enhanced Umklapp scattering due to lattice anharmonicity, as confirmed by TEM analysis and Grüneisen parameter calculations. The incorporation of high-entropy A- and B-site dopants induces local structural disorder and stress fields, further promoting phonon incoherence. This study demonstrates that coupling high-entropy chemical disorder with pressure-driven microstructure control enables effective decoupling of phonon transport pathways. The approach offers a promising strategy for designing next-generation oxide thermoelectric materials with intrinsically low lattice thermal conductivity and robust structural integrity.
研究领域:
材料科学
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凝聚态物理
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无机非金属材料
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热电材料
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固体化学
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功能陶瓷
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产品关联
DOI
高影响因子
RARE METALS
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2025
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IF 11
Bin Wang,Shun-Jie Wu,Xin-Lin Lu,Yong Ge,Yue Zhang,Zhi-Xiang Ma,Bin Xu,Paul-K. Chu,Yan-Bin Zhao
en This link goes to a English section zh This link goes to a Chinese section The limited osteogenic capacity of magnesium phosphate cement (MPC) has constrained its biomedical applications, underscoring the necessity to develop MPC with enhanced physical properties and bone-forming capabilities. In this study, a multifunctional MPC system was developed by incorporating zoledronic acid-loaded near-infrared (NIR)-responsive nanocarriers, strontium oxide (SrO), and hyaluronic acid (HA). The nanocarriers were constructed using dual-layer poly-dopamine (PDA) modification of mesoporous silica nanoparticles (MSNs), enabling controlled drug release and antibacterial efficacy under NIR stimulation. The optimized Sr-ZMP-HA MPC demonstrated prolonged setting time, near-neutral pH, superior injectability, and improved compressive strength. Immersion tests revealed its sustained degradation resistance. This composite material exhibited excellent biocompatibility along with enhanced osteogenic and angiogenic properties, particularly when activated by NIR irradiation. The experiments demonstrated that NIR-triggered Sr-ZMP-HA MPC promoted osteoblast-derived exosome secretion. These exosomes mediated miRNA transfer to osteoclasts, effectively suppressing their proliferation and differentiation while delaying bone tissue senescence. This dual-functional system, combining NIR-responsive nanomedicine with exosome-mediated intercellular communication, provided a novel strategy for developing advanced bone repair materials, potentially addressing current limitations in orthopedic applications through synergistic mechanical reinforcement and biological activation mechanisms. 摘要 en This link goes to a English section zh This link goes to a Chinese section 磷酸镁骨水泥(MPC)有限的成骨能力限制了其在生物医学中的应用,因此开发具有良好物理性能和骨形成能力的MPC是必要的。在本研究中,通过掺入唑来膦酸负载的近红外(NIR)响应纳米载体,氧化锶(SrO)和透明质酸(HA),我们开发了一种多功能MPC系统。纳米载体是通过介孔二氧化硅纳米粒子(MSN)的双层聚多巴胺(PDA)修饰构建的,能够在NIR刺激下控制药物释放和抗菌功效。优化的Sr-ZMP-HA-MPC表现出延长的固化时间,接近中性的pH值,优异的注射性和改善的抗压强度。浸泡试验表明其具有持续的抗降解性。这种复合材料表现出优异的生物相容性以及增强的成骨和血管生成特性,特别是当通过NIR照射时更加明显。实验表明,NIR触发的Sr-ZMP-HA-MPC促进成骨细胞衍生的外泌体分泌。这些外泌体介导miRNA转移至破骨细胞,有效抑制其增殖和分化,同时延缓骨组织衰老。这种将NIR响应纳米医学与外泌体介导的细胞间通讯相结合的双功能系统为开发先进的骨修复材料提供了一种新策略,可能通过协同机械增强和生物激活机制来解决目前骨科应用中的局限性。
研究领域:
生物医学材料
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骨组织工程
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纳米医学
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再生医学
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骨科
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产品关联
DOI
高影响因子
JOURNAL OF LUMINESCENCE
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2024
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IF 3.3
Yougui Yang,Yan Chen,Junhao Li,Ling He,Meng Wu,Qi Wang,Yong Yang,Zhangwen Long,Yuan Gao,Dacheng Zhou,Jianbei Qiu
All-inorganic perovskite quantum dots (QDs) in glass materials , specifically CsPbX 3 (X = Cl, Br, I), are being considered as the next-generation fluorescent materials due to their impressive luminous performance and stability. However, the crystallization process of quantum dots within the glass presents uncontrollable challenge, leading to uneven crystallinity and subsequent reductions in light efficiency, thereby affecting practical applications. In glass ceramics doped with rare-earth oxides , the introduction of rare-earth ions as nucleating agents can promote the self-precipitation of nanocrystalline crystals within the glass. Building upon this principle, we have doped rare-earth ions into borosilicate glass for the first time to induce the self-crystallization of CsPbBr 3 QDs. This approach effectively enhances the equilibrium distribution of quantum dots within the glass, resulting in a significant improvement in luminosity. Furthermore, the luminescence spectrum range of quantum dot-shaped luminescent glass materials can be finely tuned through rare-earth ion doping. This finding holds both theoretical and practical significance for their application in the field of lighting.
研究领域:
材料科学
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光学工程
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产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2024
·
IF 5.1
Shugang Li,Dan Zhang,Yongmin Duan,Keyi Gu,Junjie Zhang
Currently, it has been found that white light emitting diode (WLED) lack cyan light, which not only hinders high-color-quality lighting applications but also results in an excess of blue light in WLED. In this work, cyan-emissive CsPbCl 1.5 Br 1.5 quantum dots (QDs) were synthesized in a borosilicate glass matrix using a high-temperature melting method. The findings suggest that the increasing SrO leads to a looser glass network, which in turn intensifies phase separation, promotes the crystallization of QDs and enhances the intensity of cyan PL. Significantly, after a heating-cooling cycle, the cyan-emissive glass sample still retained 97 % of its initial PL, suggesting that the synthesized sample exhibited good thermal stability. Finally, the prepared cyan-emissive QDs glass was incorporated into a WLED, effectively fills the lack of cyan light in 470–500 nm, showed a color rendering index (CRI) of 78 at a correlated color temperature (CCT) of 8300 K. This study provides an effective and convenient approach to enhancing the cyan luminescence performance of QDs, highlighting the significant application potential of cyan-emissive QDs glass in optoelectronic devices.
研究领域:
材料科学
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光学工程
·
光电子学
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产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2024
·
IF 5.1
Shan Gao,Haidong Yu,Peng Yang,Yuewen Zhang,Hongan Ma,Xiaopeng Jia
Composites consisting of two nano-or molecular-scale components tend to exhibit newer properties or characterizations compared to the matrix material. However, they are extremely limited in thermoelectricity due to the difficulty of achieving an extremely homogeneous distribution of the material on such a small scale. In this paper, we successfully prepared a series of composite thermoelectric materials of Sr 0.9 La 0.1 Ti 0.85 Nb 0.15 O 3 /carbon nanotubes (CNTs, with contents of 0.5, 1.5, 2.5, and 5.0 wt%). Highly homogeneous dispersion of CNTs was observed in the strontium titanate oxide (SrTiO 3 ) matrix prepared via high-temperature and high-pressure (HPHT) synthesis due to the interaction between SrTiO 3 and multi-walled CNTs. The experimental results showed that CNTs were uniformly dispersed in the composite powders synthesized using the HPHT method. Meanwhile, the electrical conductivity increased linearly with the increase in the CNTs content. The power factor reached 684 μWm −1 K −2 at 973K with 2.5 wt% CNTs composite concentration. This considerable enhancement is attributed to the increase in the charge carrier concentration as well as the higher electron mobility. In addition, the lattice thermal conductivity was suppressed due to enhanced Umklapp scattering. This ultimately leads to a thermoelectric figure of merit, zT , of 0.33 at 973 K. This work opens a new window on the thermoelectric properties of nanocomposite SrTiO 3 -based thermoelectric materials.
研究领域:
材料科学
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热电学
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产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）