JOURNAL OF THE AMERICAN CERAMIC SOCIETY
·
2019
·Vol. 103
·期 5
·3104-3118
·
IF 3.094
Xiang Lv,Zhengyi Zhang,Zhiqiang Cao,Wei Jiang,Lifen Shi,Xiaojuan Zhao,Liyun Ma,Tianhe Wang,Shou Peng
A stable and translucent Bi@Bi 4 Ti 3 O 12 /TiO 2 film was fabricated on conventional glass substrates for the first time. The film exhibited a good photocatalytic performance and efficient self-cleaning capability against organic dyes under full spectral irradiation and visible light irradiation. Bi 4 Ti 3 O 12 /TiO 2 film was first prepared on a glass substrate with colloidal silica as a high temperature binder, followed by implantation of nanoscale Bi in it by an in-situ partially reduction of Bi 4 Ti 3 O 12 to generate Bi@Bi 4 Ti 3 O 12 /TiO 2 films. The improved photocatalytic ability is probably attributed to the surface plasmon resonance of Bi atom as well as the enhanced electron transfer efficiency and synergistic effect of Bi 4 Ti 3 O 12 and TiO 2 . According to trapping experiments, hydroxyl radicals (OH) were active species in the photocatalytic degradation of dyes under full spectral light irradiation and possible photocatalytic mechanism was proposed. The film prepared in this work may well have potential practical applications in many aspects, such as cleansing treatments for high building external decorative panels and also systematic characterization of the film suggests that the in-situ reduction is an effective and simple way to produce nanoscale Bi@Bi 4 Ti 3 O 12 .
✓ 已验证
产品关联
DOI
高影响因子
Journal of Materials Chemistry A
·
2016
·Vol. 4
·期 34
·13171-13175
·
IF 8.262
Zhiwei Zhou,Junyou Yang,Qinghui Jiang,Yubo Luo,Dan Zhang,Yangyang Ren,Xu He,Jiwu Xin
We studied the effect of doping with Bi on the thermoelectric properties of SnTe-based materials. Doping with Bi reduced the density of holes and increased the Seebeck coefficient over a wide temperature range as a result of modulation of the carrier concentration and an increase in the density of states effective mass. The lattice thermal conductivity was also greatly reduced as a result of the wide frequency range of phonon scattering by multiscale architectures derived from Bi doping. A maximum ZT value of c. 1.1 at 873 K was obtained in Sn0.94Bi0.06Te, an enhancement of 165% compared with the undoped sample.
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
·
2016
·Vol. 100
·期 1
·265-275
·
IF 2.787
Longwen Wu,Xiaohui Wang,Zhengbo Shen,Longtu Li
The (1− x )BaTiO 3 – x Bi(Zn 2/3 Nb 1/3 )O 3 ( x = 0.01–0.30) ceramics were synthesized by solid-state reactions. The solubility limit was determined to be x = 0.20. A systematic structural transition from a tetragonal phase ( x ≤ 0.034), to a mixture of tetragonal and rhombohedral phases (0.038 ≤ x ≤ 0.20), and finally to a pseudocubic phase ( x ≥ 0.22) at room temperature was identified. Dielectric measurement revealed a ferroelectric ( x ≤ 0.04) to relaxor ( x ≥ 0.06) transition with permittivity peak broadening and flattening, which was further verified by Raman spectroscopy and differential scanning calorimetry (DSC). Activation energies obtained from the Vogel–Fulcher model displayed an increasing trend from ~0.03 eV for x ~ 0.05, to unusually high values (>0.20 eV) for the compositions with x ≥ 0.15. With the increase in Bi(Zn 2/3 Nb 1/3 )O 3 content, the polarization hysteresis demonstrated a tendency from high nonlinearity to sublinearity coupled with the reduction in remnant polarization and coervice field. The deconvolution of the irreversible/reversible polarization contribution was enabled by first-order reversal curve distributions, which indicates that the decreasing polarization nonlinearity with the increase in Bi(Zn 2/3 Nb 1/3 )O 3 concentration could be related with the change from the ferroelectric domain and domain wall contributions to the weakly coupled relaxor behaviors.
✓ 已验证
产品关联
DOI
高影响因子
Journal of Physical Chemistry C
·
2017
·
IF 4.536
Zhan Zhang,Lixia Ren,Hong Yan,Shujin Guo,Shuanhu Wang,Min Wang,Kexin Jin
Single crystals of heterovalent Bi-doped CH3NH3PbCl3 perovskite have been successfully grown through the inverse temperature crystallization method. Bandgap narrowing of 300 meV (a 55 nm red-shifting absorption edge) is obtained for the nominal 20% Bi-doped crystal with the host structure and the energy at the top of the valence band invariable. It is observed that the contact between the Au electrodes and single crystals transforms from Ohmic to Schottky, and the conductivity increases with increasing Bi doping level. By contrast, the Bi-doped CH3NH3PbCl3 thin films are also prepared, and the similar bandgap narrowing is found, although the narrowing degree is less than that in single crystals. This work has a comprehensive understanding of Bi-doped single crystals and thin films, providing further optoelectronic applications for these promising solution-processed hybrid perovskite semiconductor materials.
✓ 已验证
产品关联
DOI
高影响因子
ELECTROCHIMICA ACTA
·
2013
·
IF 3.777
Ronghua Liu,Lina Jin,Dan Lu,Gang Hu,Long He,Jun Shan
In this paper, inspired by the cubic bi-continuous gyroid structure self-assembled by block copolymers, we start with the application of a novel and more facile approach, compared to the tedious synthetic procedures of block copolymers, to prepare the bi-continuous phases structured nanocomposite electrolytes. The bi-continuous phase structure is composed of a hard phase of the electrospun poly vinylidene fluoride (PVDF) non-woven scaffold providing the mechanical support for the electrolyte membranes and another soft phase built up then by the infiltration of polyethylene oxide (PEO) electrolyte into the PVDF scaffold membrane to be the ionic conducting phase. Therefore, the nanocomposite polymer electrolytes of the bi-continuous phase structure are prepared with addition of the different amounts of TiO 2 nanoparticles into the PEO electrolyte (containing LiClO 4 ). The nanocomposite electrolyte membranes have systematically been characterized by scanning electron microscopy (SEM), differential scanning calorimeter (DSC), X-ray diffraction (XRD), and tensile test. The tensile results indicate that the infiltration of PEO phase into the PVDF scaffold can greatly improve the elongation of the electrolyte membrane at break, but the tensile strength of the electrolyte membrane is substantially dependent on the electrospun PVDF scaffold. The ionic conductivity measurements show that addition of TiO 2 nanoparticles with an appropriate amount of ca . 10 wt% enhances the ionic conductivity of the nanocomposite electrolytes to 7.60 × 10 −5 S cm −1 at 60 °C, compared to 8.33 × 10 −6 S cm −1 at 60 °C of the PEO–LiClO 4 electrolyte. The effect of TiO 2 nanoparticles on the enhancement of Li + ion conductivity has been investigated by attenuated total reflectance-Fourier transform infrared spectra (ATR-FTIR), and the results show that a competitive interaction between TiO 2 nanoparticles and Li + ions weakens to some extent the existing complexing action of ether-O…Li + , allowing Li + ions faster transfer. However, we have found by high-resolution transmission electron microscopy (HRTEM) that the real dispersion state of TiO 2 nanoparticles in the nanocomposite electrolytes is in the form of large aggregates instead of the individual primary nanoparticles, which would tremendously depress the surface effect of the individual nanoparticles and greatly impact on the enhancement of the ionic conductivity.
✓ 已验证
产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2020
·
IF 3.83
Xin Fang,Jun Chen,Jing Zhan
Semiconductor-based heterostructure photocatalyst attracts extensive attention because of its excellent interface charge transfer/separation ability. Here, the β-Bi 2 O 3 /CeO 2 heterostructure photocatalysts are fabricated via a simple mechanochemical couple with thermal decomposition strategy. The introduction of CeO 2 can not only stabilize the phase of β-Bi 2 O 3 but also construct a heterojunction at the interface, resulting in the improved visible light response capability and efficient transfer and separation of photo-generated charges. Besides, the increased specific surface area and pore volume increase the active sites to accelerate the adsorption and mass transfer process. As a result, the β-Bi 2 O 3 /CeO 2 heterostructure photocatalyst shows remarkably enhanced photocatalytic performance towards malachite green (MG) degradation under visible-light irradiation compared with the Bi 2 O 3 and CeO 2 . The degradation efficiency of MG over the optimized β-Bi 2 O 3 /CeO 2 heterostructure reaches up to 97.5% after 2 h of visible-light irradiation. This work provides a new approach for the rational design of heterojunction photocatalyst combined with phase and interface engineering and opens up a potential avenue for efficient application of Bi 2 O 3 photocatalyst for efficient energy conversion.
研究领域:
材料科学
·
环境化学
·
光催化
·
纳米材料
·
能源转换
✓ 已验证
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2025
·
IF 6.3
Yunxiang Yuan,Hongchao Zhang,Xinyue Zhang,Erjie Yuan,Jingbing Wang,Sainan Wei
Cobalt-Nickel (CoNi) alloy particles are promising electromagnetic wave absorbers due to their strong magnetic loss and tunable morphology. To further enhance the performance, a multilayer core-shell-shell strategy was employed to construct a CoNi@SiO₂@ZnO composite. This design integrates magnetic and dielectric components to optimize impedance matching and introduce multiple interfacial polarizations. The synthesis involved a multi-step process: first, flower-like CoNi cores were synthesized via a polyol-mediated solvothermal process, whose branched architecture provides a large surface area and multiple reflection sites for enhanced microwave dissipation; then, the cores were amino-functionalized with APTES to facilitate the uniform deposition of a SiO₂ layer via a TEOS-based sol-gel process; finally, a seed-mediated method was employed. The resulting CoNi@SiO₂ particles were used as seeds, which were redispersed in an ethanol solution containing zinc ions and sodium hydroxide (NaOH) and subjected to a secondary solvothermal reaction. This successfully induced the epitaxial growth of a ZnO shell, ultimately yielding the final CoNi@SiO₂@ZnO composite material. The interlayer SiO₂ shell acts as a dielectric spacer, protects the magnetic core, and creates a distinct interface with the outer ZnO shell, collectively boosting interfacial polarization loss. The synergistic effect between the magnetic CoNi core and the dielectric double shells results in superior absorption performance. With a thickness of only 2.0 mm, the composite achieves a minimum reflection loss of −31.95 dB at 14.05 GHz and an effective absorption bandwidth (RL < −10 dB) of 6.59 GHz (11.41–18.00 GHz). This work demonstrates a rational route toward lightweight, high-efficiency, broadband absorbers under low-thickness conditions.
研究领域:
材料科学
·
电磁功能材料
·
纳米复合材料
·
微波吸收
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF BIOMATERIALS APPLICATIONS
·
2023
·
IF 2.9
Lihua Guan,Huijing Zhao,Kai Wang,Ke-qin Zhang,Kai Meng
Compliance mismatch between the artificial blood vessel and the host vessel leads to abnormal hemodynamics and is a major mechanical trigger of intimal hyperplasia. Efforts have been made to achieve higher compliance of artificial blood vessels. However, the preparation of artificial blood vessels with compliance matching to host vessels has not been realized. A bi-layered artificial blood vessel was successfully prepared by dip-coating and electrospinning composite method using poly(L-Lactide-co-caprolactone) (PLCL) and thermoplastic poly(ether urethane) (TPU). In the case of a certain wall thickness (200 μm), thickness ratios of the PLCL inner layer (dip-coating method) and TPU outer layer (electrospinning method) were controlled at 0:1, 1:9, 3:7, 5:5, 7:3, and 1:0 respectively and the compliance, radial tensile properties, burst pressure, and suture retention strength were investigated. Results showed compliance value of the artificial blood vessel decreased with the increase of the thickness ratio, which suggested the compliance of the bi-layered artificial blood vessel can be regulated by adjusting the ratio of the inner and outer layer thicknesses. In the six different artificial blood vessels, the one with thickness ratio of 1:9 not only had high compliance (8.768 ± 0.393%/100 mmHg) but also can guarantee the other mechanical properties, such as the radial breaking strength (6.333 ± 0.689 N/mm), burst pressure (534.473 ± 20.899 mmHg), and suture retention strength (300.773 ± 9.351 cN). The proposed artificial blood vessel preparation method is expected to achieve compliance matching with the host vessel. It is beneficial for eliminating abnormal hemodynamics and reducing intimal hyperplasia.
研究领域:
生物医学工程
·
材料科学
·
心血管外科
✓ 已验证
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2019
·
IF 8.355
Wang-Wei Liao,Lei Yang,Jie Chen,Da-Li Zhou,Xian-lin Qu,Kun Zheng,Guang Han,Jia-Bei Zhou,Min Hong,Zhi-Gang Chen
Copper selenide (Cu 2 Se) has been extensively studied as an eco-friendly thermoelectric candidate owing to the outstanding thermoelectric performance of its high-temperature β-phase. In this study, we propose that α-Cu 2 Se is also a promising thermoelectric material at near-room-temperature. We synthesize nanostructured Cu 2-x Se via a facile solvothermal method, and densify the samples using Spark Plasma Sintering to maintain the small grain sizes. Although the as-prepared α-Cu 2 Se has intrinsically low lattice thermal conductivity , its high Cu deficiency leads to a high carrier concentration, therefore, a low thermoelectric performance. As an electron donor, bismuth can effectively compress the Cu vacancies of the as-prepared α-Cu 2 Se and in turn reduce its carrier concentration from 4.1 × 10 20 to 2.0 × 10 20 cm −3 at room temperature, achieving a significantly enhanced power factor and a reduced carrier thermal conductivity. Consequently, a zT of 0.43 at 373 K is obtained in Cu 1.982 Bi 0.006 Se, showing great potential in developing high-performance near-room-temperature α-Cu 2 Se-based thermoelectric materials.
研究领域:
材料科学
·
能源技术
✓ 已验证
DOI
高影响因子
LANGMUIR
·
2022
·
IF 4.331
Xiaolei Zhang,Bin Liu,Shu Yao,Zongming Liu,Jinkai Li
Photothermal therapy (PTT) has attracted great attention as an anticancer treatment strategy. With the rapid development of nanomedicine, multifunctional inorganic nanophotothermal agents provide a new way to improve the effect of PTT. Herein, bovine serum albumin (BSA)-modified Bi nanosheets (Bi NSs) with good biocompatibility were synthesized by a facile redox and ball milling method and applied as a photothermal agent for the enhancement of PTT. Owing to the strong near-infrared absorption, Bi NSs exhibit high photothermal conversion efficiency (η = 36.17%) under 808 nm laser irradiation and can serve as a nanotherapeutic agent for cancer therapy. In addition, in vitro cell safety analysis also suggests that the toxicity of BSA-modified Bi NSs is negligible. Upon 808 nm irradiation, the uptake ability of tumor cells to Bi NSs@BSA has been improved. Moreover, Bi NSs@BSA also can be used as a good contrast agent for CT imaging and then to observe the distribution of materials in the tumor site. Finally, Bi NSs@BSA-mediated PTT results show a high ablation rate of A549 tumor cells both in vitro and in vivo. All results reveal that Bi NSs@BSA is a promising nanotherapeutic platform for PTT.
研究领域:
纳米医学
·
癌症治疗
·
生物材料
✓ 已验证
DOI
PubMed
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2026
·
IF 9.7
Chun Sun,Jiazhi Cui,Zhengtao Qiu,Jiabao Bai,Chao Fan,Dan Huang,Guohua Jia
Perovskites have attracted considerable interest as potential photocatalysts for sustainable hydrogen generation. Nonetheless, their intrinsic instability in aqueous media significantly constrains their practical deployment in photocatalytic hydrogen evolution. To address this challenge, we propose a versatile strategy for stabilizing Cs 3 Bi 2 Br 9 (CBB) perovskite photocatalysts through combining zwitterionic ligand encapsulation with Sn 4+ doping. The zwitterionic ligand, synthesized by reacting 4-bromobutyric acid (BBA) with oleylamine (OLA), was employed to passivate the perovskite surface by anchoring to both Bi 3+ and Br − sites, effectively mitigating surface defects. Notably, Sn 4+ doping is essential for aqueous stability, as the incorporation of Sn 4+ not only enhances the intrinsic stability of CBB but also reinforces the binding affinity of surface ligands. As a result, the Sn 4+ -doped CBB (CBBS x ) with ligand encapsulation demonstrates remarkable stability, retaining its structural integrity in water for over six months and withstanding more than three cycles of photocatalytic testing. Importantly, this strategy demonstrates considerable generality, as it can be readily extended to the synthesis of other halide perovskites. Specifically, the MoS x -loaded Sn 4+ :Cs 3 Bi 2 Br x I 9-x (MoS x /CBBIS 0.2 ) composite achieves a remarkable hydrogen evolution rate of 18.2 mmol h −1 g −1 , which represents the highest performance reported to date among Bi-based perovskite photocatalysts.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2021
·Vol. 46
·期 8
·3588-3594
·
IF 3.591
Qingqing Gao,Qian Lei,Ruoyan Miao,Manyi Gao,Hu Liu,Qin Yang,Yequn Liu,Fang Song,Yongsheng Yu,Weiwei Yang
Polymeric carbon nitride (PCN) is an emerging metal-free photocatalyst with high stability but is plagued by low photocatalytic efficiency due to the rapid charge carrier recombination behavior. Herein, Bi-doped graphitic carbon nitride nanotubes (BCN nanotubes) with a porous structure have been facilely prepared by one-step thermal polymerization of mixtures of melamine, urea and bismuth nitrate pentahydrate under an Ar atmosphere. With unique structural advantages for charge carrier transfer, light harvesting, and large surface area, the as-prepared BCN nanotubes exhibit excellent photocatalytic activity for the degradation of Rhodamine (Rh) B with a 26.8-fold higher reaction rate than that of PCN under visible light irradiation. This work provides informative principles about the synthesis of PCN with controlled morphology and element doping simultaneously for the photocatalytic degradation of chemical pollutants.
研究领域:
材料科学
·
环境科学
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）