ADVANCED FUNCTIONAL MATERIALS
·
2023
·
IF 19
Qiang Wang,Mengjie Wang,Li Wen,Wei Zeng,Binghui Ge,Chaofeng Zhang,Yang Yue,Siliang Wang
The emerging aqueous zinc-ion batteries (ZIBs) have received extensive attention and research due to their unique advantages of low cost, safety, and environmental friendliness. However, the development of appropriate cathode materials to improve battery performance remains a major challenge. Herein, a new MXene and Bi (MXene/Bi) composite material is first applied as the (de)intercalation cathode of ZIB. The dispersed MXene nanosheets in the composite materials greatly improve the conductivity and hydrophilicity of the electrode, and prevent the stacking and the volume expansion in the charge/discharge process of 2D Bi fragments. The experimental results show that composite MXene/Bi electrode has remarkable capacity and ultralong life. Next, the good kinetics and (de)intercalation energy storage mechanism of ZIB are revealed through abundant electrochemical tests and ex situ characterization. The quasi-solid-state (QSS) ZIB is also constructed, showing superior electrochemical performance, flexibility, pressure resistance, and heat resistance. Besides, the QSS ZIB can be used directly as a self-powered pressure sensor to monitor the external pressure in real time based on the response current. This study not only demonstrates that MXene/Bi is a potential cathode for ZIBs, but also offers a feasible path to explore and design the next generation of high-performance multifunctional ZIBs.
研究领域:
材料科学
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电化学
·
能源存储与转换
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产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2023
·
IF 6.2
Fei Hu,Jinhe Wei,Xiong Shen,Lin Chen,Zhongming Wang,Xin Peng,Chenglong Lv,Qiuyun Ouyang
The Bi/Ti 3 C 2 T x composites were synthesized by a hydrothermal method . Then the Bi/Ti 3 C 2 T x powder was dispersed into methyl methacrylate (MMA) to fabricate the (Bi/Ti 3 C 2 T x ) 2–6 /polymethyl methacrylate (PMMA) organic glasses. The crystalline structure and phase of the Bi/Ti 3 C 2 T x were measured by the X-ray diffraction. The photoluminescence (PL) spectra and the electrochemical impedance spectra (EIS) of the Bi/Ti 3 C 2 T x were measured to prove the enhanced optical and electrical properties. The nonlinear optical (NLO) properties of the (Bi/Ti 3 C 2 T x ) 2–6 /PMMA organic glasses were investigated by the Z-scan technique. The (Bi/Ti 3 C 2 T x ) 2–6 /PMMA organic glasses exhibit the reverse saturable absorption (RSA) and self-defocusing effects. Compared to the (Bi) 2 /PMMA and (Ti 3 C 2 T x ) 2 /PMMA organic glasses, the (Bi/Ti 3 C 2 T x ) 2–6 /PMMA organic glasses exhibit the enhanced NLO properties. Among three different amount Bi/Ti 3 C 2 T x /PMMA organic glasses, (Bi/Ti 3 C 2 T x ) 4 /PMMA organic glass exhibits the strongest RSA and self-defocusing effects with β eff = (6.34 ± 1.90)× 10 2 cm·GW −1 and γ = (–3.52 ± 0.07)× 10 −4 cm 2 ·GW −1 . The enhanced RSA and self-defocusing effect of the (Bi/Ti 3 C 2 T x ) 2–6 /PMMA organic glasses make them exhibit the excellent optical limiting (OL) performance. In addition, the Bi/Ti 3 C 2 T x composites show excellent electrochemical performance as an electrode material for energy storage systems. The resultant Bi/Ti 3 C 2 T x electrode yields a high specific capacity of 68.5 mAh·g −1 at a current density of 1 A·g −1 , which is approximately 4.2 and 6.1 times than those of the Bi and Ti 3 C 2 T x electrodes, respectively. The experimental results exhibit the Bi/Ti 3 C 2 T x is highly promising for energy storage and OL devices.
研究领域:
材料科学
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光学工程
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能源存储
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产品关联
DOI
高影响因子
CRYSTENGCOMM
·
2019
·Vol. 21
·期 17
·2799-2808
·
IF 3.382
Yunpeng Liu,Lixiong Qian,Xiaoyi Zhao,Jiayi Wang,Lei Yao,Xueqing Xing,Guang Mo,Quan Cai,Zhongjun Chen,Zhonghua Wu
Composites with hierarchical structures have wide potential applications in the catalyst industry. In this paper, a self-assembled 3D flower-like architecture of the Bi/γ-Fe2O3 composite has been successfully synthesized without employing any surfactants and templates via a facile and economical hydrothermal method. Its formation process has been studied. X-ray diffraction (XRD), X-ray absorption fine structure (XAFS), scanning electron microscopy (SEM), high-resolution transmission electron microscopy (HRTEM), and Raman spectroscopy techniques were used to monitor the formation process. The results demonstrate that the self-assembled 3D flower-like Bi/γ-Fe2O3 composite consists of a Bi metal nucleus and a γ-Fe2O3 shell. The Bi metal nucleus is identified to be an aggregate of Bi nanoparticles, while the γ-Fe2O3 shell results from the intercrossing of γ-Fe2O3 nanoslices. The time-dependent intermediate products in the self-assembly process were structurally characterized. The influence of concentration and the formation process have been carefully discussed. A possible formation mechanism has been proposed. By virtue of the structural understanding of the novel 3D flower-like Bi/γ-Fe2O3 composite, this work is expected to highlight its potential applications.
研究领域:
材料科学
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纳米技术
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DOI
高影响因子
Journal of Environmental Chemical Engineering
·
2024
·
IF 7.4
Shuqi Gong,Rongyu Zhang,Chengji Sui,Yunlei Zhou,Zhengkun Yu,Li Ma,Huanshun Yin,Tianyi Sun,Junling Duan
Bi/Bi 2 O 2 CO 3 composite photocatalytic materials with oxygen vacancies were synthesized in one step by a hydrothermal method using bismuth nitrate pentahydrate as the bismuth source and N,N-dimethylformamide as the carbon source and reducing agent. The photocatalytic degradation performance of Bi/ Bi 2 O 2 CO 3 under simulated sunlight was investigated using the environmental hormone pollutant bisphenol A as the degradation target. The results show that the synergistic effect of Bi metal plasmon resonance effect (SPR) and oxygen vacancies promotes the effective separation of photogenerated electrons and holes, which greatly improves the photocatalytic ability. The degradation rate of Bi/Bi 2 O 2 CO 3 for bisphenol A (85.2 %) is 2.67 times higher than that of the single-component material Bi 2 O 2 CO 3 (31.9 %).The effect of external conditions (pH, anions, cations) on the photocatalytic performance was investigated. As well, ESR and active intermediate species capture experiments were performed on the composites, and it was deduced that h + , 1 O 2 , and ·O 2 - were the main reactive substances in this reaction system. And toxicity experiments were conducted on the degradation products, which proved that the toxicity of the degradation products was reduced.
研究领域:
环境科学
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材料科学
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产品关联
DOI
高影响因子
JOURNAL OF CHEMICAL TECHNOLOGY AND BIOTECHNOLOGY
·
2021
·Vol. 96
·期 6
·1732-1741
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IF 3.174
Zhiguo Sun,Jiaming Fan,Run Feng,Menglu Wang,Yue Zhou,Li Zhang
BACKGROUND In recent years, the emission of volatile organic compounds (VOCs) from different sources has caused huge environmental problems. As a ‘green’ terminal treatment technology, photocatalytic technology is a competitive technology that has practical application prospects for the emission reduction of VOCs. The core problem of photocatalysis technology is constructing a photocatalyst with higher activity. RESULTS In this work, a new hierarchical heterostructured photocatalyst of TiO 2 /Bi/Bi 2 MoO 6 was facilely fabricated by solvothermal method with the TiO 2 nanoparticles uniformly distributed on the surface of flower-like Bi 2 MoO 6 nanospheres. Compared with the bare flower-like Bi 2 MoO 6 nanospheres, the band gap width of TiO 2 /Bi/Bi 2 MoO 6 is wider, which helps to improve the Fermi level-derived oxidation–reduction capacity of the catalyst. N 2 adsorption–desorption experiments show that the composite material has a larger specific surface area, which is beneficial to improve the mass transfer efficiency in the gas–solid heterogeneous reaction. Photocatalytic data display that, under irradiation by Xenon lamp for 2 h, the degradation rate of toluene gas over TiO 2 /Bi/Bi 2 MoO 6 reached 26.08%, which is 17.92% higher than that of the bare Bi 2 MoO 6 nanospheres. CONCLUSION These results indicate that coupling TiO 2 could significantly enhance the photocatalytic degradation effect of toluene over the hierarchical heterostructured TiO 2 /Bi/Bi 2 MoO 6 , and this has practical application prospects for the use of photocatalytic technology to treat VOCs pollution. © 2021 Society of Chemical Industry
研究领域:
环境科学
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材料科学
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产品关联
DOI
高影响因子
Nanoscale
·
2021
·Vol. 13
·期 20
·9270-9279
·
IF 7.79
Yuanyuan Dong,Chenxing Xu,Lei Zhang
Herein, we reported a label-free and reliable photoelectrochemical (PEC) platform for highly selective monitoring of norepinephrine (NE) based on metallic Bi nanoparticles anchored on hollow porous ZnSnO3 microspheres (3D Bi/ZnSnO3) via a simple solvothermal strategy. The designed 3D Bi/ZnSnO3 Schottky junction exhibited a unique photoanodic response toward NE among other catechol derivatives, such as epinephrine (EP) and dopamine (DA), and effectively shielded the interference from thirteen coexisting biomolecules like uric acid (UA) and ascorbic acid (AA). High selectivity and excellent sensitivity could be correlated to the unique chelating coordination interaction between NE and Zn2+ at surface sites as well as the efficient carrier separation of Bi/ZnSnO3, thereby developing a novel “signal-on” label-free and selective strategy for NE detection. The proposed Bi/ZnSnO3-based PEC sensor achieved remarkable NE biosensing with a low detection limit of 0.68 nmol L−1 and a wide response ranging from 0.002 to 350.0 μmol L−1. The applicability of this biosensor was realized for the selective analysis of NE in human serum, human urine and injection samples, laying the foundation for the label-free PEC monitoring of NE in biological fluids.
研究领域:
生物传感器
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材料科学
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分析化学
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产品关联
DOI
PubMed
高影响因子
RSC Advances
·
2016
·Vol. 6
·期 17
·14273-14282
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IF 3.289
Longwen Wu,Xiaohui Wang,Longtu Li
Lead-free (1 − x)BaTiO3–xBi(Zn2/3Nb1/3)O3 (x = 0.05–0.20) materials were fabricated via solid-state reactions. A pure perovskite pseudocubic structure is obtained for all compositions. Dielectric measurements reveal an intensified diffusion and relaxor-like characteristics from 5 mol% to 20 mol% Bi(Zn2/3Nb1/3)O3. Weakly coupled relaxor behavior is concluded from the exceptionally high activation energies of ∼0.20–0.22 eV from the Vogel–Fulcher model for x ≥ 0.10, which possibly results in the extremely low dielectric nonlinearity and extra slim polarization–electric field loops. An optimal discharged energy density of 0.79 J cm−3 with a high energy efficiency of 93.5% is achieved at 131 kV cm−1 for x = 0.15, which proves that the BaTiO3–Bi(Zn2/3Nb1/3)O3 material is a promising candidate for high energy storage applications.
研究领域:
材料科学
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物理学
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产品关联
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2024
·
IF 6.3
Kun Wang,Shen Yu,Peng Jiang,Wenrui Liu,Man-Man Yuan,Wangyu Tong,Lihua Chen,Zhao Deng,Baolian Su
CO 2 reduction by a sustainable pathway such as photothermal catalysis is highly demanded currently, high carrier recombination rate still severely limits the performance of photothermal catalysis. Constructing heterojunction interfaces with high exposed area is an effective strategy to solve the problem of carrier recombination. However, fine control of the interface structure is still highly challenging. Herein, Density functional theory (DFT) calculations were constructed to reveal that metallic Bi leads to more densities of states (DOS) generation at the conduction band edge in Bi-BiOBr, which argues that photogenerated electrons are more likely to be delivered to metallic Bi. A TiO 2 @Bi-BiOBr hollow hierarchical core–shell heterojunction was designed, providing a highly exposed interface and Bi between interfaces. Such structure endows the catalyst with excellent photothermal catalytic performance, achieving a CO yield of 30.4 μmol·h −1 ·g −1 . The highly improved performance is attributed to interfacial thermoelectrons transfer boosted by the construction of TiO 2 @BiOBr heterojunction as well as metal Bi. And a possible CO 2 reduction pathway is proposed, which is consistent with the Carbine pathway. This study provides an exciting idea for the modulation of photoelectron transfer at catalyst interfaces.
研究领域:
材料科学
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环境科学
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催化化学
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产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2025
·
IF 5.6
C.X. Chen,X.Z. Zheng,W.B. Dai,C.Y. Ni,W.Y. Li,D. Wu
As energy consumption intensifies, energy saving and environmentally friendly phosphor-converted white light-emitting diodes (pc- w LEDs) have become the current research hotspots. The garnet-based CaY 2 Al 4 SiO 12 (CYAS) phosphors, with their abundant lattice sites and stable physical properties, are ideal candidates as phosphor hosts. Through comprehensive experimental and theoretical analyses, including XRD/Rietveld refinement and density functional theory (DFT) calculations, it was determined that Bi 3+ /Tb 3+ /Sm 3+ ions preferentially occupy the Y 3+ lattice site. The luminescence properties and thermal stability of CYAS: Bi 3+ /Tb 3+ /Sm 3+ have been extensively investigated. The quantum yield (QY) has been enhanced to 48.3 % due to energy transfer (ET), which is not a significant difference compared to existing phosphors, and by superposition of blue (Bi, 3 P 1 → 1 S 0 ), green (Tb, 5 D 4 → 7 F 5 ), and red (Sm, 4 G 5/2 → 6 H 5/2 ) emission, resulting in tunable spectrum and high-quality, full-spectrum white light emission. Finally, the w LED device with high color rendering index (CRI, 87), high luminous efficiency (LE, 74 lm·W −1 ), and low correlated color temperature (CCT, 4747.56 K) were fabricated by a remote ‘encapsulation’ packaging strategy, suggesting that the phosphor can be applied to high quality white light illumination.
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
JOURNAL OF HAZARDOUS MATERIALS
·
2024
·
IF 12.2
Jia Huang,Yunjie Zou,Lan Ling
Perfluorooctanoic acid (PFOA) is detected widely in surface and groundwater globally. Its removal poses a significant challenge due to its high chemical stability. This study demonstrates efficient PFOA degradation using poly-triazine-imides-tailored defective Bi 5 O 7 I (PTI/BB). Under 300 W Xe irradiation, 1 µg·L −1 PFOA could be degraded to 9.86 ng·L −1 after 3 h in the presence of 0.5 g·L −1 25 % PTI/BB. The mechanism investigation reveals that the oxygen vacancy (OV) in partially reduced Bi/Bi 5 O 7 I (BB) generates impurity states, enhancing the light-harvesting capacity. Furthermore, forming a type Ⅱ heterojunction between conjugated PTI and BB facilitates the efficient separation of photogenerated carriers. The resulting photogenerated electrons (reduction) and holes (oxidation) drive hydrogenation reduction and oxidative decarboxylation of PFOA, respectively. This synergistic effect consequently achieves significant defluorination of PFOA. The proposed PFOA degradation pathway via the PTI/BB catalyst offers new insights into the catalyst design for photocatalytic degradation of per- and polyfluoroalkyl substances (PFAS).
研究领域:
环境科学
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材料科学
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产品关联
DOI
PubMed
高影响因子
JOURNAL OF APPLIED PHYSICS
·
2021
·Vol. 129
·期 12
·
IF 2.546
Liu Bo-Mei,Gan Wei-Jiang,Lou Sun-Qi,Zou Rui,Tang Qiang,Wang Cheng-Xin,Jiao Ju,Wang Jing
The development of functionalized persistent-luminescent (PersL) materials is currently receiving intense interest for diverse applications. However, PersL materials emitting ultraviolet light in the 315–400 nm (UVA) range are lacking. Herein, a series of x-ray-activated PersL materials based on ABCO 4 -type structures with random cation arrangements are developed. Comprehensive experiments confirm that materials featuring random cation arrangements are sufficiently general to act as host materials for PersL. Experimental results indicate that as-synthesized SrLaXO 4 :Bi 3+ (X = Al, Ga, In) powders have tunable PersL bands covering the UV-to-visible range after x-ray irradiation. Taking advantage of the depth-independent nature of x-ray illumination in tissues, UVA Persl composites using the matched photosensitizer g-C 3 N 4 (SrLaAlO 4 :Bi@g-C 3 N 4 ) are well suited for x-ray-activated photodynamic therapy, as proven by tests for singlet-oxygen ( 1 O 2 ) generation. Therefore, we suggest that the proposed concept be applied to discover additional functionalized PersL materials for clinical cancer therapy in the future.
研究领域:
材料科学
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医学
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生物工程
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产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
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2025
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IF 6.3
Shukang Jiang,Guangwei Zheng,Junhao Sun,Fengqing Zhang,Hongwen Yu
The surface plasmon resonance (SPR) of plasmonic metals is an effective strategy for enhancing photocatalytic efficiency. Herein, we successfully synthesized the SPR-promoted Bi/Bi 2 WO 6 heterojunction photocatalysts by in situ reduction of Bi 3 + in Bi 2 WO 6 nanosheets to plasmonic Bi via a facile solvothermal method. The size of Bi nanoparticles on the surface of Bi 2 WO 6 was adjusted by varying the solvothermal temperature. After 15 min of visible light irradiation, the Bi/Bi 2 WO 6 heterojunction with a suitable size of metal Bi obtained after solvothermal treatment at 160°C exhibited 100 % degradation of Rhodamine B (RhB), which was 2.3 times greater than that of the pure Bi 2 WO 6 . The excellent photodegradation performance of this sample can be attributed to the SPR effect of metal Bi, which enhances light absorption, generates active sites and species, and facilitates rapid carrier transfer. Additionally, the formation of the Bi/Bi 2 WO 6 Schottky heterojunction promotes carrier separation and minimizes the recombination of photogenerated electron-hole pairs. Furthermore, a potential mechanism for the photodegradation process of the synthesized photocatalyst has been proposed. This work not only offers new perspectives on in situ fine-tuning strategies for Bi-based photocatalysts but also demonstrates the potential of low-cost metallic Bi as a viable alternative to noble metals for enhancing photocatalytic performance.
研究领域:
材料科学
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环境科学
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产品关联
DOI
高影响因子
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