ANALYST
·
2018
·Vol. 143
·期 20
·5030-5037
·
IF 3.864
Qiong Wu,Fengxia Zhang,Huijuan Li,Zhihua Li,Qi Kang,Dazhong Shen
Herein, we report a ratiometric photoelectrochemical (PEC) immunosensor coupled with secondary antibodies–Co3O4 nanoparticle conjugates (Ab2–Co3O4 NPs) for signal amplification. The Ab1-g-C3N4@TiO2 NTs and BSA-g-C3N4@TiO2 NTs act as the sensing and reference photoelectrodes, where Ab1, BSA and TiO2 NTs are the capture antibodies, bovine serum albumin and TiO2 nanotube arrays, respectively. In the presence of target Ag, the sensing PEC photocurrent decreases due to the steric hindrance of Ab1 molecules, which increases the inner resistance of the photoelectrode. The signal-off response is enhanced further using Ab2–Co3O4 NP conjugates due to their steric hindrance effect and the consumption of electron donors by the Co3O4 NPs. Furthermore, the performance of the ratiometric PEC platform is tested using alpha-fetoprotein (AFP) as a model antigen. Under the optimal conditions, the concentration of AFP is detected in the range of 0.4 pg mL−1 to 40 ng mL−1 with a detection limit of 0.2 pg mL−1. This ratiometric strategy is beneficial to improve the reliability and anti-interference ability of PEC immunosensors.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Journal of Materials Chemistry A
·
2018
·Vol. 6
·期 33
·16196-16204
·
IF 9.931
Jianqiu Zhao,Yawei Yang,Chenhui Yang,Yapeng Tian,Yan Han,Jie Liu,Xingtian Yin,Wenxiu Que
Solar steam generation is a renewable, environmentally friendly and low-cost technology for seawater desalination and wastewater remediation. Highly efficient solar evaporation from pure water has been achieved using advanced artificial architectures and hydrophilic light absorption materials, while the long-term steady work for high salinity water desalination becomes a non-negligible problem when it comes to practical use. In terms of this issue, a hydrophobic MXene membrane, which contains a salt-blocking delaminated Ti3C2 nanosheet layer with trimethoxy(1H,1H,2H,2H-perfluorodecyl)silane modification for sunlight harvesting and a piece of commercial filter membrane for water supply, is proposed in this work. With high light utilization, high stability, abundant evaporating channels, rapid water transport through the filter membrane and salt-blocking on the MXene membrane, the as-fabricated self-floatable device achieves a solar evaporation rate of 1.31 kg m−2 h−1 and a solar steam conversion efficiency of 71%, and stability under high salinity conditions under one sun over 200 hours, ensuring the highly efficient and long-term stable photothermal transduction for water purification from seawater and wastewater containing organic dyes and heavy metals. The hydrophobic surface enabled salt-blocking MXene membrane is proved to be an effective, efficient and stable photothermal material for solar desalination.
✓ 已验证
产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2018
·
IF 3.057
Jiali Xue,Kuibao Zhang,Zongsheng He,Wenwen Zhao,Weiwei Li,Dayan Xie,Haibin Zhang
Simulated radioactive soil waste has been immobilized rapidly by self-propagating high-temperature synthesis (SHS) using CuO as the oxidant. CeO 2 was incorporated into the soil waste as the surrogate of radioactive actinide nuclides. The phase composition, microstructure, elemental distribution, density and chemical durability of obtained waste forms have been characterized. These results show that the radioactive soil waste forms were successfully prepared with zirconolite (2M-CaZrTi 2 O 7 ), soil (SiO 2 ) and Cu as the main phases. Simulated nuclide Ce was successfully immobilized in the solidified zirconolite-rich ceramic body. Moreover, the radioactive soil waste solidified body exhibits excellent chemical durability. The normalized leaching rates (42 d) of Si and Ca are in low values of 4.1 × 10 −3 and 2.5 × 10 −3 g m −2 d −1 , while that of Ce is kept as 10 −4 − 10 −6 g m −2 d −1 within 42 days. This result indicates a potential application of SHS for the safety disposal of radioactive contaminated soil waste.
✓ 已验证
产品关联
DOI
高影响因子
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
·
2019
·Vol. 21
·期 32
·17801-17810
·
IF 3.567
Qiushi Song,Zheng Zhang,Hongwei Xie,Huayi Yin,Zhiqiang Ning
The carbonization of transition metals in molten salts was performed to study the effect of electrochemical polarization and molten salt medium on the carbonization process. The carbonization of niobium (Nb) has been systemically investigated in Ar atmosphere and molten salts. The effect of particle size and structure of the starting materials, molten salt medium, and electric field on the formation of NbC was studied to reveal the dynamic barriers in the carbonization process. A native oxide layer and/or niobate derivatives generated on the Nb particles are the main barriers for the mass transfer of carbon and Nb towards each other. The results showed that molten salts can accelerate the formation of NbC by enhancing the diffusion of carbon, and the kinetic barrier can be effectively eliminated by supplying negative polarization to the cathode in molten salts to remove the oxide barriers, thereby enhancing carbonization. Besides Nb, tungsten (W), molybdenum (Mo), titanium (Ti), and tantalum (Ta) can also be carbonized in molten salts with the assistance of an applied electric field.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
·
2019
·
IF 14.229
Zizheng Ai,Yongliang Shao,Bin Chang,Lei Zhang,Jianxing Shen,Yongzhong Wu,Baibiao Huang,Xiaopeng Hao
As a metal-free polymeric semiconductor, graphitic carbon nitride (g-C 3 N 4 ) is a promising candidate for photocatalytic water splitting but suffers from the insufficient optical absorption and sluggish utilization of photocarriers. Herein, based on the energy band engineering theory, a new design philosophy of tunable p-n homojunction is proposed and realized in a novel P-doped g-C 3 N 4 (PCN) material. Through regulating the tendency of transformation in p-n homojunction, a strong internal electric field is built and integrated with two secondary internal electric fields by further decorating with Ti 3 C 2 , leading to the formation of a triple-internal electric field system. Thus the spatial separation efficiency of photocarriers is improved and their lifetime is prolonged. The specific photocatalyst exhibits excellent overall water splitting performance in pure water with a notable quantum yield. This work presents a peculiar concept of adjustable p-n homojunction and holds great significance for the rational design of advanced photocatalyst in water splitting.
✓ 已验证
产品关联
DOI
高影响因子
Journal of Advanced Ceramics
·
2017
·Vol. 7
·期 1
·41-49
·
IF 1.198
Peng Le,Zhang Kuibao,He Zongsheng,Yin Dan,Xue Jiali,Xu Chen,Zhang Haibin
In this research, Zr-doped Gd 2 Ti 2 O 7 pyrochlores, with the composition of Gd 2 (Ti 1- x Zr
x
) 2 O 7 , were firstly synthesized by self-propagating high-temperature synthesis plus quick pressing (SHS/QP) using CuO as the oxidant and Ti as the reductant. To improve the radiation resistance of titanate–pyrochlore, up to 35 at% Zr was incorporated to substitute the Ti site of Gd 2 Ti 2 O 7 pyrochlore (Gd 2 (Ti 0.75 Zr 0.35 ) 2 O 7 ). XRD and SEM microstructural characterizations showed the formation of a composite ceramic with the major pyrochlore phase and the minor Cu phase. The generated temperature of samples decreased from 1702 to 1011°C with increasing Zr content. The effects of sintering temperature and pressure time on phase composition and microstructure were systematically studied. Besides, the influence of thermal transmission on the whole combustion process was also explored. The pyrochlore-based waste form possessed high bulk density of 6.25 g/cm 3 and Vickers hardness of 10.81 GPa. The MCC-1 leaching test showed the normalized elemental leaching rates (42 d) of Cu, Gd, and Zr are 1.27×10 -2 , 1.33×10 -3 , and 8.44×10 -7 g·m -2 ·d -1 , respectively.
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ELECTRONIC MATERIALS
·
2017
·Vol. 47
·期 6
·3248-3253
·
IF 1.579
Chen Jun-Liang,Liu Chengyan,Miao Lei,Gao Jie,Zheng Yan-yan,Wang Xiaoyang,Lu Jiacai,Shu Mingzheng
With excellent high-temperature stability (up to 1000 K) and favorable electrical properties for thermoelectric application, TiNiSn-based half-Heusler (HH) alloys are expected to be promising thermoelectric materials for the recovery of waste heat in the temperature ranging from 700 K to 900 K. However, their thermal conductivity is always relatively high (5–10 W/mK), making it difficult to further enhance their thermoelectric figure-of-merit ( ZT ). In the past decade, introducing nano-scale secondary phases into the HH alloy matrix has been proven to be feasible for optimizing the thermoelectric performance of TiNiSn. In this study, a series of TiNiSn-based alloys have been successfully synthesized by a simple solid-state reaction. The content and composition of the heterogeneous phase (TiNi 2 Sn and Sn) is accurately regulated and, as a result, the thermal conductivity successfully reduced from 4.9 W m −1 K −1 to 3.0 Wm −1 K −1 (750 K) due to multi-scale phonon scattering. Consequently, a ZT value of 0.49 is achieved at 750 K in our TiNiSn-based thermoelectric materials. Furthermore, the thermal stability of TiNiSn alloys is enhanced through reducing the Sn substance phase.
✓ 已验证
产品关联
DOI
高影响因子
ACS Nano
·
2017
·
IF 13.942
Guodong Zou,Qingrui Zhang,Carlos Fernandez,Gang Huang,Jianyu Huang,Qiuming Peng
Rational design of heterogeneous electrode materials with hierarchical architecture is a potential approach to significantly improve their energy densities. Herein, we report a tailored microwave-assisted synthetic strategy to create heterogeneous hierarchical Ti3SiC2@C-containing Na2Ti7O15 (MAX@C-NTO) composites as potential anode materials for high-performance sodium storage in a wide temperature range from 25 to 80 °C. This composite delivers first reversible capacities of 230 mAh g–1 at 200 mA g–1 and 149 mAh g–1 at 3000 mA g–1 at 25 °C. A high capacity of ∼93 mAh g–1 without any apparent decay even after more than 10 000 cycles is obtained at an ultrahigh current density of 10 000 mA g–1. Moreover, both a high reversible capacity and an ultralong durable stability are achieved below 60 °C for the same composites, wherein a 75.2% capacity retention (∼120 mAh g–1 at 10 000 mA g–1) is achieved after 3000 cycles at 60 °C. To the best of our knowledge, both the sodium storage performances and the temperature tolerances outperform those of all the Ti-based sodium storage materials reported so far. The superior sodium storage performances of the as-synthesized composites are attributed to the heterogeneous core–shell architecture, which not only provides fast kinetics by high pseudocapacitance but also prolongs cycling life by preventing particle agglomeration and facilitates the transportation of electrons and sodium ions by large micro/mesopore structure.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CERAMICS INTERNATIONAL
·
2025
·
IF 5.6
Jiale Zhang,Jianjun Chen,Jinyu Guo,Hao Chen,Longbo Xue,Chenyu Li
In this study, silicon nitride (Si 3 N 4 ) powders with high α-phase content and rod-like crystal morphologies were synthesized via self-propagating high-temperature synthesis (SHS) in a low-pressure nitrogen atmosphere (0.2 MPa), using silicon and Si 3 N 4 powders as reactants, with magnesium powder serving as an igniter. The influence of different ratios of silicon to silicon nitride on the phase composition, crystal morphology, and sintering activity of the synthesized Si 3 N 4 powders was systematically investigated. The results demonstrated that controlling the silicon-to-silicon nitride ratio under low-pressure conditions significantly affects the formation of α-phase Si 3 N 4 and the resulting microstructure of the powders. A low-pressure nitrogen atmosphere was adopted based on kinetic and thermodynamic analyses, providing a feasible environment for SHS. Notably, in situ formation of magnesium nitride (MgSiN 2 ) during the reaction not only acted as an effective sintering aid but also improved the thermal conductivity of the resulting Si 3 N 4 ceramic. The powder produced from a reaction using a raw material composition of 65% Si minimizes both silicon infiltration and melting to the greatest extent, and consequently, the sintered silicon nitride ceramics exhibit the highest thermal conductivity. The low-pressure environment effectively moderated the reaction rate and temperature, promoting the formation of fine α-phase Si 3 N 4 particles with rod-like morphologies. This innovative method offers a cost-effective and environmentally friendly approach for producing high-quality Si 3 N 4 powders with high sintering activity.
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE
·
2016
·Vol. 52
·期 6
·3535-3544
·
IF 2.302
Gao Xiufeng,Chen Shaoping,Dong Feng,Hu Lifang,Yang Renyao,Wang Wenxian,Munir Zuhair A.
The diffusion bonding between Ti and Ni was investigated in the presence and absence of an imposed electric current. Bonding was carried out over the temperature range of 873–1123 K and the current density range of 255–350 A/cm 2 . The formation and sequence of evolution of the three intermetallic phases, TiNi 3 , TiNi, and Ti 2 Ni, were investigated and discussed in light of calculations of Gibbs free energies of formation and interfacial energies associated with their nucleation. Within the experimental times and in the presence of a current, the growth of the three phases was parabolic. The evolution of the TiNi phase required an incubation period, while the relatively high growth rate of TiNi 3 suggests the possibility of another mechanism. The growth of all phases was enhanced by the application of a direct current, with no apparent dependence on its direction.
✓ 已验证
产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2016
·
IF 2.758
Wei-Ming Guo,Zhi-Lin Zhang,Jing-Xi Li,Yang You,Shang-hua Wu,Hua-Tay Lin
Al 2 O 3 –B 4 C ceramics had poor densification, due to the formation of Al 18 B 4 O 33 phase by reaction between Al 2 O 3 and B 2 O 3 on the surface of B 4 C. In the present work, Y 2 O 3 or Ti additive together with ZrO 2 from milling media were introduced into Al 2 O 3 –B 4 C ceramics. Results showed that Y 2 O 3 reacted with B 2 O 3 to produce YBO 3 phase, and removed Al 18 B 4 O 33 phase, resulting in the improved densification and the coarse microstructure. However, Ti and ZrO 2 reacted with B 2 O 3 to produce hard TiB 2 and ZrB 2 phases, removed the most of Al 18 B 4 O 33 phase, refined microstructure by pinning effect of hard particles, and improved densification and mechanical properties .
✓ 已验证
产品关联
DOI
高影响因子
Journal of Materiomics
·
2017
·
IF 0
Haiqiang Liu,Hongan Ma,Taichao Su,Yuewen Zhang,Bing Sun,Binwu Liu,Lingjiao Kong,Baomin Liu,Xiaopeng Jia
We present the work about the initiative fabrication of multi-scale hierarchical TiO 2-x by our strategy, combining high pressure and high temperature (HPHT) reactive sintering with appropriate ratio of coarse Ti to nanosized TiO 2 . Ubiquitous lattice defects engineering has also been achieved in our samples by HPHT. The thermoelectric performance was significantly enhanced, and rather low thermal conductivity (1.60 W m −1 K −1 ) for titanium oxide was reported here for TiO 1.76 . Correspondingly, a high dimensionless figure of merit ( zT ) up to 0.33 at 700 °C was realized in it. As far as we know, this value is an enhancement of 43% of the ever best result about nonstoichiometric TiO 2 and the result is also exciting for oxide thermoelectric materials. The moderate power factor, the significantly reduced thermal conductivity and the remarkable synergy between electrical properties and thermal conductivity are responsible for the excellent thermoelectric performance. We develop a facile strategy for preparing multi-scale hierarchical TiO 2-x and its superior ability to optimize thermoelectric performance has been demonstrated here.
✓ 已验证
产品关联
DOI
危险品化学品经营许可证（带存储）