RSC Advances
·
2018
·Vol. 8
·期 30
·16603-16610
·
IF 2.936
Fangfang Li,Fengyi Wang,Xuan Hu,Baozhan Zheng,Juan Du,Dan Xiao
The detection of nitroaromatic explosives is important due to their strong explosive force and harmfulness in the environment, and for homeland security and public safety. Herein, a phosphorescence CaTiO3:Pr3+@SiO2 nanosensor was successfully developed for the sensitive and selective detection of 2,4,6-trinitrophenol (TNP). The red-emitting phosphorescent chemosensor CaTiO3:Pr3+@SiO2 possessed a long enough phosphorescence lifetime of 0.016 s. The TNP induced phosphorescence quenching process of CaTiO3:Pr3+@SiO2 presented a wide linearity with TNP concentrations ranging from 0.5 to 100 μM, and the detection limit was found to be 20.6 nM. Furthermore, this sensor displayed a high selectivity toward TNP over other structurally similar compounds like 2,4,6-trinitrotoluene (TNT), 2,4-dinitrotoluene (DNT), 4-nitrotoluene (NT), 2,4-dinitrophenol (DNP), 4-nitrophenol (NP) and phenol. This sensing system was successfully used in the test of TNP concentrations in water samples, and showed great potential for practical application.
研究领域:
材料科学
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环境科学
·
化学
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产品关联
DOI
PubMed
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
·
2023
·
IF 13.6
Hangjun Zhang,Yunyi He,Mengfan He,Qiyue Yang,Guoyi Ding,Yuanshuai Mo,Zhiquan Liu,Panpan Gao
Sulfate radical mediated advanced oxidation processes (SR-AOPs) have emerged as a promising alternative for emerging contaminants degradation. However, high activity and great stability are commonly difficult to juggle, and the structure-activity correlations are still ambiguous. This study constructed the cubic CaTiO 3 perovskite modified by highly-dispersed cobalt for peroxymonosulfate (PMS) activation to improve the specific lattice plane exposure and reduce the metal leaching simultaneously. 98% of amitriptyline (AMT) degradation was achieved within 60 min under the condition of 200 mg/L Co0.1-CTO and 100 mg/L PMS . The results indicated that surface Co 2+ /Co 3+ redox couple and lattice oxygen were responsible for PMS activation, and the evolution of · OH, SO 4 ·- and 1 O 2 were revealed. According to density functional theory (DFT) calculations, the highly-dispersed Co on cubic surface effectively captured PMS and promoted electron transfer for the generation of · OH and SO 4 ·- , while more oxygen atoms exposed on Co0.1-CTO(200) surface facilitated the generation of 1 O 2 . Briefly, this study provides a novel strategy of catalyst synthesis in PMS activation for water treatment .
研究领域:
环境科学
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催化材料
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水处理技术
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DOI
PubMed
高影响因子
Advanced Electronic Materials
·
2022
·Vol. 8
·期 9
·2101414
·
IF 7.633
Chao Du,Di Zhou,Rui-Tao Li,He-Tuo Chen,Guo-Hong Zhou,Bin Tang,Moustafa Adel Darwish,Song Xia,Zhuo Xu
In this paper, the medium dielectric constant 0.65CaTiO 3 -0.35LaAlO 3 (CTLA) composite microwave ceramic is employed to introduce in dielectric patch antennas (DPA). Typical, high-performance microwave dielectric properties of ε r ≈ 44.8, Q × f ≈ 43 950 GHz@3.67 GHz and TCF ≈ 0 ppm °C –1 can be obtained by solid-state reaction method in CTLA composite microwave ceramics sintered at 1450 °C for 2 h. Then, the CTLA composite ceramic patch fired with silver coating is mounted on the Rogers RO4003C substrate operating as a magnetic wall boundary. A simplified cavity-like theoretical model is used to analyze the proposed DPA structure and the accuracy of this antenna model is evaluated by the theoretical results from a commercial CST Microwave Studio 2019. Based on this, the CTLA composite ceramic physical property is modified to enhance the radiation efficiency and reduce profile of the DPA. The higher-order TM 121 mode is brought close to the dominant TM 101 mode by taking advantage of the multimode characteristics of the dielectric patch resonator and introducing a sintered silver slot in the ceramic dielectric patch. For demonstration, the proposed DPA prototype operating in the multiprobe antenna near the field measurement system is implemented and measured.
研究领域:
电子工程
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材料科学
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产品关联
DOI
高影响因子
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
·
2023
·
IF 5.7
Huan Liu,Yu Liu,Xueqing Yu,Minmin Mao,Bing Liu,Hadi Barzegar Bafrooei,Aihua Li,Yuanyuan Zhang,Ehsan Taheri-Nassaj,Kaixin Song,Wenjun Li,Ian.M. Reaney
New ultra-low loss, temperature-stable composite ceramics, (1- x ) Mg 1.99 Ga 0.01 Si 0.99 Al 0.01 O 4 - x CaTiO 3 , have been developed with a view to expanding the portfolio of low-cost, MW dielectrics available for 5 G/6 G telecommunications, currently dominated by 95 wt%MgTiO 3 -5 wt%CaTiO 3 , (Mg,Ca)TiO 3 (relative permittivity, ε r ∼ 21, quality factor, Q × f ∼ 56,000 GHz and temperature coefficient of resonant frequency, τ f ∼ 0 ppm/°C). Compared with (Mg,Ca)TiO 3 , 89 wt%Mg 1.99 Ga 0.01 Si 0.99 Al 0.01 O 4 -11 wt%CaTiO 3 ceramics are also temperature stable ( τ f = −2.72 ppm/°C) but have lower ε r (∼8.55) and a higher Q × f (∼ 72,900 GHz @ 12 GHz and 80,900 GHz @ 26 GHz), better suited to the higher frequencies earmarked for 6 G millimeter-wave (mm-wave) applications. To demonstrate its potential for 5 G/6 G telecommunications, a waveguide filter with novel negative coupling structure was fabricated based on simulated results. The filter had low insertion loss (0.43 dB) at the center frequency (4.8 GHz) and high selectivity with a roll-off rate of 576/375 dB/GHz. The S-parameters matched well at 25 °C and 85 °C, demonstrating that the filter had excellent temperature stability and was therefore suitable for future 5 G/6 G microwave and mm-wave communication devices.
研究领域:
材料科学
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电子工程
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产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2021
·
IF 13.273
Wenjia Yang,Wen Cui,Lin Yang,Guo Zhang,Xiaofang Li,Yu Shen,Fan Dong,Yanjuan Sun
Considering that the structural differences could dictate the photocatalytic efficiency, the cubic SrTiO 3 (STO) and tetragonal CaTiO 3 (CTO) were developed to illustrate the structure–activity relationship. The STO with cubic structure demonstrates much higher photocatalytic toluene removal efficiency ( ca. 80.0%) than that of CTO ( ca. 20.0%), which can be ascribed to boosted formation of reactive oxygen species (ROS), increased selectivity of intermediates, and promoted ring-opening and mineralization rate. Combining theoretical simulation and experimental characterization, the results reveal that the O 2 and H 2 O molecules tend to be adsorbed on the cubic STO, which boosts the formation of ROS. Also, highly selective formation of intermediate (benzoic acid) has been realized to accelerate ring-open and mineralization process as evidenced by the smooth conversion of STO as indicated by Gibbs free energy. This work provides new perspectives on the understanding of relationship between intrinsic structure and photocatalytic performance.
研究领域:
材料科学
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环境科学
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催化
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化学工程
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DOI
高影响因子
Journal of Materials Chemistry B
·
2017
·Vol. 5
·期 26
·5128-5136
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IF 4.543
Yike Fu,Heng Liu,Zhaohui Ren,Xiang Li,Jie Huang,Serena Best,Gaorong Han
Photodynamic therapy (PDT) and photothermal therapy (PTT) have been explored widely for application in cancer treatment. In this work, we describe the synthesis of CaTiO3:Yb,Er (CTO) nanofibers co-conjugated with Rose Bengal (RB) and gold nanorods (AuNRs), which offer the potential for combined upconversion photoluminescence (UCPL) and enhanced, synergistic PDT and PTT. Based on this delivery platform, RB and AuNRs served as the PDT and PTT agents, respectively. RB and AuNRs have strong and well-matched absorption with the green and red emissions of UCPL CTO nanofibers respectively, hence a single 980 nm continuous wave laser with deep tissue penetration can be employed to allow PDT and PTT to occur simultaneously. The nanocomposite can effectively convert the near-infrared (NIR) radiation from the laser into a combination of targeted hyperthermia and generation of reactive oxygen species (ROS). In comparison with PDT or PTT alone, the combined PDT/PTT treatment showed significantly enhanced suppression of the viability of Hep G2 cells in vitro, demonstrating its potential for use in oncology.
研究领域:
肿瘤学
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生物医学工程
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纳米医学
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光动力治疗
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光热治疗
✓ 已验证
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2023
·
IF 9.9
Fang-Yuan Bai,Jing-Ru Han,Jun Chen,Yue Yuan,Ke Wei,Yuan-Sheng Shen,Yi-Fu Huang,Heng Zhao,Jing Liu,Zhi-Yi Hu,Yu Li,Bao-Lian Su
Glucose conversion assisted photocatalytic water splitting technology to simultaneously produce H 2 and high value-added chemicals is a promising method for alleviating the energy shortage and environmental crisis. In this work, we constructing type II heterojunction by in-situ coupling Zn 0.3 Cd 0.7 S quantum dots (ZCS QDs) on three-dimensionally ordered microporous CaTiO 3 (3DOM CTO) for photocatalytic H 2 production and glucose conversion. The DFT calculations demonstrate that substitution of Zn on the Cd site improves the separation and transmission of photogenerated carriers. Therefore, 3DOM CTO-ZCS composite exhibits best H 2 production performance (2.81 mmol g -1 h −1 ) and highest apparent quantum efficiency (AQY) (5.56 %) at 365 nm, which are about 47 and 18 times that of CTO nanoparticles (NPs). The improved catalytic performance ascribed to not only good mass diffusion and exchange, highly efficient light harvesting of 3DOM structure, but also the efficient charges separation of type Ⅱ heterojunction. The investigation on photocatalytic mechanism indicates that the glucose is mainly converted to gluconic acid and lactic acid, and the control reaction step is gluconic acid to lactic acid. The selectivity for gluconic acid on 3DOM CTO-ZCS is 85.65 %. Our work here proposes a green sustainable method to achieve highly efficient H 2 production and selective conversion of glucose to gluconic acid.
研究领域:
材料科学
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环境科学
·
化学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Junchuan Zhang,Yuan Yan,Andac Armutlulu,Kexin Wei,Jian Wu,Bo Lai,Ruzhen Xie
Heterojunctions present a promising avenue for improving charge separation in photocatalytic water purification processes. However, the multicomponent heterojunction interfaces often act as recombination centers for photogenerated carriers. Herein, a Ti-based homologous-like heterojunction was fabricated by in-situ growth of controllable CaTiO 3 on sulfur-doped TiO 2 (STCTO). This heterojunction exhibits outstanding performance in photocatalytic water decontamination when assisted by peroxymonosulfate (PMS). The well-matched interfaces within the heterojunction generate internal electric fields that facilitate efficient electron migration from ST to CTO by minimizing the energy barrier. PMS serves as a dual function as an electron-acceptor to enhance carriers separation efficiency, and as a precursor for sulfate radical generation, thereby promoting the production of reactive species. Consequently, the homologous-like heterojunction STCTO enables complete Atrazine removal without any deterioration even after 8th recycle. These findings underscore the synergistic effects of photo-energized and PMS-intensified homologous heterojunctions, providing insights into a novel approach for the removal of refractory hazardous organic contaminants using solar energy.
研究领域:
环境科学
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材料科学
✓ 已验证
产品关联
DOI
高影响因子
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
·
2026
·
IF 7.9
Wei Zhao,Linran Huang,Jun Wang,Kaiqi Zou,Yuhang Zhao,Yong Cao,Kunhao Feng,Wei Li,Chao Cai,Qingsong Wei
Porous Y 2 O 3 ceramics are considered promising materials for applications such as titanium-alloy precision casting due to their high chemical compatibility with reactive Ti melts. Conventional binder-jetted Y 2 O 3 , however, suffers from poor sintering, high initial porosity, and inter-layer connected defects. In this study, an aqueous binder was used as an active carrier for the localized introduction of nano-CaTiO 3 sintering activators into the printed regions during binder jetting. Nano-CaTiO 3 -modified binders were prepared by two-step ball-milling, dilution, and sequential filtration, and their stability, rheology, jetting, and wetting behavior were evaluated. Binders with 3–9 wt% nano-CaTiO 3 enabled stable piezoelectric jetting and powder-bed penetration. After sintering at 1600 °C, open porosity decreased from 51.15% to 35.43%, flexural strength increased from 11.36 to 28.19 MPa, and roughness decreased from 10.66 to 5.42 μm. XRD and SEM–EDS support the formation of Ti-containing interfacial reaction products, while XPS indicates changes in the local chemical environment. Ca-related defect modification is proposed as a possible contribution.
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产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2025
·
IF 5.6
Fei Liu,Zhixiang Wei,Yujie Zhao,Shaojun Liu,Hao Li
The rapid densification of ceramics printed by digital light processing (DLP) has been a technical and scientific challenge in the field of additive manufacturing. This work explores the rapid microwave hybrid sintering (MS) process for DLP-printed 0.95MgTiO 3 -0.05CaTiO 3 (MT-CT) microwave ceramics, aiming at reducing the densification time. The sintering trajectories of DLP-printed MT-CT ceramics at 1300°С show that highly dense ceramics without significant grain growth can be achieved by only 75 min and a fast heating rate (30°С/min). The MS process can enable DLP-printed MT-CT ceramics to reach the initial, intermediate, and final stages of sintering at a temperature 100 °C lower than that required for the CS process by integrating uniform volumetric heating with thermal radiation. DLP-printed MT-CT ceramics sintered by MS exhibit excellent dielectric properties: ε r = 20.4, Q × f = 75,300 GHz, τ f = −2.5 ppm/°C, representing a 13.4 % enhancement in Q × f values compared to ceramics by CS for 240 min. DLP-printed MT-CT dielectric resonator antenna sintered by MS at 1300°С for 75 min exhibits a radiation efficiency exceeding 90 % at 5.9 GHz ( S 11 = −42.43 dB), showing their promising potential for high-frequency communication applications.
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产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2023
·
IF 5.2
Hongping Hou,Amei Zhang,Huan Yang,Na Liao,Shailendra Rajput,Hongliang Du,Chunchun Li
A low permittivity microwave dielectric ceramic, Li-containing silicate (LiGaSiO 4 ), was synthesized using the standard solid-state reaction method. The nominal LiGaSiO 4 ceramic exhibited a relative permittivity of approximately 4.4. The effects of nonstoichiometric Li on the microstructure, sintering behavior, and microwave dielectric properties of LiGaSiO 4 were comprehensively investigated. Excess Li content (6 mol%) significantly improved the relative density (96.1 %) and microwave dielectric properties ( ε r ∼5.34, Q × f ∼55,600 GHz, and τ f ∼ -48.6 ppm/°C), while reducing the optimum sintering temperature from 1070 °C to ∼1010 °C. Additionally, the incorporation of 2 wt% LiF further reduced densification temperature (∼940 °C). The regulation of the τ f was achieved through the addition of CaTiO 3 ceramic, and a patch antenna was designed and fabricated using a modified Li 1.06 GaSiO 4 -LiF-CaTiO 3 composite ceramic. The resulting patch antenna resonates at 5.87 GHz with an impressive bandwidth of 83.1 MHz, while both simulated and measured results demonstrate excellent agreement.
研究领域:
材料科学
·
电磁学
·
天线工程
·
微波工程
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产品关联
DOI
高影响因子
ADVANCED MATERIALS
·
2022
·Vol. 34
·期 47
·2206970
·
IF 32.086
Zhijia Zhang,Xu Yang,Peng Li,Yao Wang,Xin Zhao,Javad Safaei,Hao Tian,Dong Zhou,Baohua Li,Feiyu Kang,Guoxiu Wang
Rechargeable multivalent metal (e.g., zinc (Zn) and aluminum (Al)) batteries are ideal choices for large-scale energy storage owing to their intrinsic low cost and safety. However, the poor compatibility between metallic anodes and electrolytes strongly hampers their practical applications. Herein, it is demonstrated that confining multivalent metals in a biomimetic scaffold (Bio-scaffold) can achieve highly efficient multivalent metal plating/stripping. This Bio-scaffold is well-tailored through the synergy of a parallel-aligned array of fractal copper branches and a CaTiO 3 (CTO)-based coating layer. By virtue of this design strategy, the as-developed Bio-scaffold-based Zn- and Al-metal anodes exhibited dendrite-free morphologies with high reversibility and long lifespan, as well as excellent performance for Zn and Al full batteries. Theoretical modeling and experimental investigations reveal that the fractal copper array not only facilitates multivalent ion diffusion and electrolyte wetting but also effectively reduces the local current densities during cycling; Meanwhile, the CTO-based coating layer effectively blocks interfacial side reactions and enables a homogeneous ionic flux. This work opens a new avenue for developing multivalent metal batteries.
研究领域:
材料科学
·
电化学
·
储能系统
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DOI
高影响因子
危险品化学品经营许可证（带存储）