Nature Communications
·
2024
·Vol. 15
·期 1
·1-10
·
IF 14.7
Jia Guangri,Sun Fusai,Zhou Tao,Wang Ying,Cui Xiaoqiang,Guo Zhengxiao,Fan Fengtao,Yu Jimmy C.
Artificial photosynthesis is a promising approach to produce clean fuels via renewable solar energy. However, it is practically constrained by two issues of slow photogenerated carrier migration and rapid electron/hole recombination. It is also a challenge to achieve a 2:1 ratio of H 2 and O 2 for overall water splitting. Here we report a rational design of spatially differentiated two-dimensional Bi 4 Ti 3 O 12 nanosheets to enhance overall water splitting. Such a spatially differentiated structure overcomes the limitation of charge transfer across different crystal planes in a single crystal semiconductor. The experimental results show a redistribution of charge within a crystal plane. The resulting photocatalyst produces 40.3 μmol h –1 of hydrogen and 20.1 μmol h –1 of oxygen at a near stoichiometric ratio of 2:1 and a solar-to-hydrogen efficiency of 0.1% under simulated solar light.
研究领域:
材料科学
·
能源化学
✓ 已验证
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2020
·
IF 6.182
Xinyue Liang,Bin Xiang,Xuefeng Zou,Feng Chen,Jiangyu Hao,Qin Hu,Wenpo Li
The poor cycling life hindered the progression of aqueous nickel-based batteries. Herein, a facile electrodeposition approach was employed to design a three-dimensional lamellar Bi anode (TL-Bi) on nickel foam with a long-term cycling stability for rechargeable aqueous Ni//Bi batteries. The areal capacity of the TL-Bi electrode was 0.19 mA h cm −2 at 4 mA cm −2 in a three-electrode system. Also, the fabricated Ni//Bi battery constituted through an as-obtained TL-Bi anode and a NiO cathode delivered an excellent power density specific capacity of 14.4 mW cm −2 and exceptional durability (retaining 94.1% after 4500 cycles) in an aqueous electrolyte. With the merits of safe and easy to operate, this simple available pressing method may inspire new development for reversible aqueous batteries.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2023
·
IF 6.7
Binbin Tan,Jing Wang,Yao Deng,Huidi Zhang,Jiang Wang,Zhihao Zhang,Wenlei Wang
The key to enhancing the activation efficiency of peroxydisulfate (PDS) lies in facilitating the adsorption of PDS and accelerating the rate of electron transfer at the interface. In this work, the oxygen vacancy (Ovs) concentration of ultrathin Bi 4 Ti 3 O 12 (BTO) was controlled in situ by high-energy electron beam bombardment. BTO V -300 exhibited a significant activation effect on PDS. The degradation rate constant ( k obs ) for the removal of ciprofloxacin (CIP) was measured to be 0.2080 min −1 under visible light irradiation, which was 3.71 times greater than that of the original BTO. Density functional theory calculations uncovered the principal role of oxygen vacancies as active sites for PDS activation. Introducing OVs significantly boosted the adsorption energy of PDS on BTO and lengthened the O O bond of PDS. This study represents the potential mechanism behind the activation of PDS by BTO V and provides valuable insights for enhancing the photoactivation efficiency of PDS.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
·
2019
·
IF 7.65
Ningyuan Zhu,Chunquan Li,Lingjun Bu,Cilai Tang,Sichu Wang,Pengfei Duan,Lunguang Yao,Jun Tang,Dionysios D. Dionysiou,Yonghong Wu
An innovative advanced oxidation process was successfully developed to photocatalytic-degradation of estrone through the synergistic effect of biochar and Bi/Bi 2 O 3 in bismuth-containing photocatalytic biochar (BiPB). The highest reaction rate constant ( k obs ) of estrone degradation by BiPB was 0.045 min −1 under the conditions of initial concentration of estrone =10.4 μmol L −1 , [BiPB] =1 g L −1 , pH = 7.0. The k obs was almost tenfold and more than 20 times than that of biochar without bismuth impregnation and pristine Bi/Bi 2 O 3 , respectively. The best photocatalytic performance of BiPB composites for the degradation of estrone was primarily attributed to generation of OH radicals. Impregnation of bismuth helped control the concentration of persistent free radicals (PFRs) and develop a hierarchical porous structure of biochar. The presence of biochar facilitated pre-concentration estrone on BiPB and improved the separation and transfer efficiency of charge carriers. The synergistic effect between biochar and Bi/Bi 2 O 3 contributed to the generation of OH radicals for estrone degradation under neutral pH conditions. The transformation pathway of estrone was also proposed based on the measured transformation products in the presence of BiPB. The high efficiency of BiPB composites indicated that this easily-obtained material was promising for estrone-wastewater treatment applications as a low-cost composite photocatalyst.
研究领域:
环境科学
·
材料科学
✓ 已验证
DOI
PubMed
高影响因子
CERAMICS INTERNATIONAL
·
2019
·
IF 3.45
Xiyong Chen,Mingxin Zhou,Junzuo Shi,Tianquan Liang,Jie Zeng,Xia Yan,Nengneng luo,Weizhou Li,Yuezhou Wei
The effect of nominal Na/Bi ratio on the microstructure and electrical conductivity of A-site fully stoichiometric sodium bismuth titanates , Na 0.5+ x Bi 0.5− x TiO 3− δ , was investigated in this study. Bulk samples with x = 0, 0.01, 0.03, 0.05, 0.07, and 0.1 were prepared by conventional solid state reaction method. The as-calcined powders primarily exhibited the perovskite structure, which was identified by X-ray diffraction. Electron microscopic investigation of the sintered samples, however, revealed the presence of secondary phases, the amounts of which were found to increase with increasing Na/Bi ratio. Further elemental analysis by energy dispersive spectroscopy indicated that the secondary phases were mainly composed of sodium titanates with different Na/Ti ratios. The grain bulk and grain boundary conductivities of Na 0.5+ x Bi 0.5− x TiO 3− δ , measured by two-probe AC electrochemical impedance spectroscopy , significantly increased with increasing Na/Bi ratio when x ≤ 0.03, but remained almost constant at higher x . The synergetic effect of oxygen vacancy creation, grain size reduction, and secondary phase formation on the variation in the conductivity upon increasing the nominal Na/Bi ratio in Na 0.5+ x Bi 0.5− x TiO 3− δ was discussed.
研究领域:
材料科学
·
固态化学
✓ 已验证
DOI
高影响因子
RSC Advances
·
2020
·Vol. 10
·期 35
·20713-20723
·
IF 3.119
Yunpeng Liu,Hao Wang,Lixiong Qian,Xiaoyi Zhao,Lei Yao,Jiayi Wang,Xueqing Xing,Guang Mo,Zhongjun Chen,Zhonghua Wu
Bismuth ferrite (BiFeO3) is a promising Bi-based perovskite-type material, which is multiferroic due to the coexistence of anti-ferromagnetism and ferroelectricity. During the preparation of pure BiFeO3 nanoparticles, however, the phase structures and species of bismuth–iron-based precursor (BFOH) were still unclear, and so related precursors were prepared. X-ray diffraction, Raman, Fourier transform infrared, and X-ray absorption near-edge structure techniques were used to probe the phase structure and species of the precursors. It was found that the precursor BFOH is composed of Bi6O6(NO3)4(OH)2·2H2O, Bi6O5(NO3)5(OH)3·3H2O, Fe(OH)3, and α-Bi2O3. Calcination treatment and hydrothermal synthesis were used to prepare the pure BiFeO3 phase from the precursor BFOH. The calcination temperature was optimized as 400 °C for preparation of the pure BiFeO3 phase. Meanwhile, hydrothermal conditions for the synthesis of the pure BiFeO3 phase were also optimized as follows: the reaction solution was the mixture solution of Bi(NO3)3·5H2O and Fe(NO3)3·9H2O with cetyltrimethyl ammonium bromide (CTAB) as the surfactant and KOH as the mineralizer; the hydrothermal synthesis was performed at 180 °C for 48 h; the concentration of KOH should be at least 3 M; and the surfactant CTAB can be used to regulate the morphology of the as-prepared BiFeO3 nanoparticles. From the point of view of the microstructure, BiFeO3 nanoparticles prepared by calcination or hydrothermal methods have no notable differences. A formation mechanism from the precursor BFOH to the BiFeO3 product is proposed. By providing an understanding of the precursors, this work is very helpful in the synthesis of bismuth–iron-based nanoparticles.
研究领域:
材料科学
·
化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CERAMICS INTERNATIONAL
·
2017
·
IF 2.986
Qi Zhang,Zan Dai,Gang Cheng,YunLing Liu,Rong Chen
We developed a facile in-situ growth method to construct amorphous-based Bi 2 S 3 /Bi 2 WO 6 heterostructures at room temperature. As demonstrated by HRTEM , XPS and EDX-mapping, amorphous state Bi 2 S 3 dispersed uniformly on the surface of crystalline Bi 2 WO 6 hollow spheres. The photocatalytic activities of prepared Bi 2 S 3 /Bi 2 WO 6 heterostructures were evaluated by the photodegradation of RhB and TC under visible light irradiation, indicating that the introduction of appropriate amorphous Bi 2 S 3 significantly improved the photocatalytic activity of Bi 2 WO 6 . The amorphous/crystalline contact in Bi 2 S 3 /Bi 2 WO 6 heterostructures played a crucial role in the enhancement of photocatalytic efficiency. Based on DRS, photoluminescence spectra, photocurrent intensity, electrochemical impedance spectroscopy and OCVD measurements, it was proposed that the enhanced performance could be ascribed to increased visible light utilization, promoted separation efficiency and prolonged life time of photogenerated electron-hole pairs by the introduction of amorphous Bi 2 S 3 . This work may provide new insights into the construction of amorphous-based composited heterostructures for improving photocatalytic activity.
研究领域:
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2022
·
IF 5.518
Xintong Yao,Haoran Zhen,Dafeng Zhang,Junchang Liu,Xipeng Pu,Peiqing Cai
Constructing full spectrum photocatalyst is an effective strategy to improve the conversion efficiency of solar energy. In this work, BiOI:Yb 3+ ,Er 3+ /Bi 2 O 4 (BYE/BO) direct Z-scheme heterojunction photocatalysts were successfully synthesized by a fast and simple microwave-assisted hydrothermal method . XRD , XPS , FE-SEM, TEM , PL , DRS, and BET were used to investigate the physical and chemical properties of samples. Compared to pure BYE and BO, as-synthesized BYE/BO samples had significantly improved photocatalytic activity in the degradation of Ciprofloxacin and Rhodamine B when exposed to visible or near infrared light (NIR) light. Among them, 20% -BYE/BO has the best photocatalytic activity , and its NIR-light degradation ratio of Ciprofloxacin is as high as 66 and 103 times that of BO and BYE, respectively. The enhanced photoactivity of as-synthesized BYE/BO heterojunction is attributed to synergistic effects of the upconversion and the direct Z heterojunction . Moreover, capture experiment showed that the·O 2 - and h + were main active species, and the directive Z-scheme mechanism was proposed.
研究领域:
材料科学
·
光催化
✓ 已验证
DOI
高影响因子
Nano Energy
·
2023
·
IF 17.6
Lei Shi,Ze Li,Wenyue Zhao,Zhao Wang,Yazhou Peng,Chang Gao,Wenjing Hua,Jie Wang,Xiaoxia Yang,Weidong Fei,Yu Zhao
Photovoltaic effects of single-layer films, with simple structure and low cost, are generally found in ferroelectric films , but their applications in solar cell are restricted by the large band gap of ferroelectrics . Here, we demonstrate a large photovoltaic effect can be obtained in paraelectric single-layer BiVO 4 (BVO) film based on the gradient distribution of charges. The circuit current density ( J SC ) and open circuit voltage ( V OC ) of the BVO film with best performance are 1.63 mA/cm 2 and 0.38 V, respectively. The J SC of BVO film kept 86% of the maximum value after continuous operation for 16 h. The high thermal stability of BVO is proved by long time operation and stable photovoltaic performance at high temperature. This work not only proposes a novel built-in electric field mechanism, but also indicates that the single-layer paraelectrics can be used as the next generation photovoltaic materials.
研究领域:
材料科学
·
能源科学
✓ 已验证
产品关联
DOI
高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2025
·
IF 19
Jinqiu Ye,Tiancheng Ge,Xin Qu,Mohamedazeem M. Mohideen,Ce Wang,Ping Hu,Yong Liu
The widespread application of aqueous zinc-ion batteries (AZIBs) is hindered by anode dendrite formation and side reactions, reducing cycling life and performance. This study introduces Bi-Bi₂O₃-loaded carbon nanofibers (Bi-Bi₂O₃@CNF) with hierarchical hollow structures and surface grooves fabricated via electrospinning, thermal treatment, and in situ growth. Experimental characterization and density functional theory reveal that the high surface area and fibrous network of Bi-Bi₂O₃@CNF enhance electron transport and electrolyte distribution, effectively reducing ohmic resistance and concentration polarization. This “Spatial Effect” provides ample space for uniform Zn deposition. Additionally, the in situ-grown Bi-Bi₂O₃, pyridinic nitrogen, pyrrolic nitrogen, and C─O─Bi bonds induce strong zinc affinity and electronegativity, generating an “Electrostatic Confinement Effect” that amplifies the “spatial effect” into a “Dual-Confinement Effect.” This synergy ensures uniform Zn deposition, suppresses dendrites and side reactions, and mitigates polarization. Compared to pure Zn anodes, Bi-Bi₂O₃@CNF reduces polarization overpotential by 17.6%, increases hydrogen evolution overpotential by 11.52%, and maintains a Coulombic efficiency of 98.8% for over 200 h. In full cells, Zn@Bi-Bi₂O₃@CNF//MnO₂ achieves 73.0% capacity retention after 1000 cycles at 1000 mA g⁻¹. This work provides a promising strategy for high-efficiency, durable, and safe AZIBs and offers valuable insights into the design of advanced aqueous energy storage materials.
研究领域:
材料科学
·
电化学
·
能源存储
✓ 已验证
产品关联
DOI
高影响因子
MATERIALS & DESIGN
·
2024
·
IF 7.6
Cuilu Xi,Jiang Xu,Haonan Chen,Jiawen Wang,Xinna Zhang,Yinyan Li,Gongxun Bai,Hui Xu,Zhen Xiao,Shiqing Xu
Among numerous polluting compounds, the organic dyes and antibiotics are two servious factors causing water pollution. Hence, it is urgent to find a fast and safe way to degrade waste water in a sustainable approach. Here, ferroelectric heterostructure based on 2D Bi 2 MoO 6 nanosheets and Bi 2 S 3 nanorods has been prepared by a two-step solvothermal method for the reduction of organic dyes and antibiotics. Due to the energy band balance between Bi 2 S 3 and Bi 2 MoO 6 , the formed type-II heterostructure can populate charge transfer at the junction and effectively inhibit electron-hole recombination. Under ultrasonic stimulation, catalytic active sites of a Bi 2 MoO 6 /Bi 2 S 3 heterostructure for pollutant degradation can be generated through rapid charge transfer activation, thus enhancing the catalytic degradation effect of organic dyes and antibiotics. The Bi 2 MoO 6 /Bi 2 S 3 heterostructure not only has good degradation effect, but also shows better stability. This work opens up new avenues for designing highly-efficient catalysts, which is of importance for wastewater degradation and energy-saving applications.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
INORGANIC CHEMISTRY
·
2021
·
IF 5.165
Bo Zhang,Jun Li,Ming Pang,Ying-Shuo Wang,Meng-Zhen Liu,Hui-Meng Zhao
Using in situ formed metal complexes of [Fe(bipy)3]2+ or [Ni(bipy)3]2+ (bipy = 2,2′-bipyridine) as templates, four new Ag–Bi–X (X = I and Br) compounds are first isolated in the metal-complex-decorated heterometallic halobismuthate family, namely [M(bipy)3]AgBiI6 (M = Fe (1), Ni (2)), [Fe(bipy)3]AgBiBr6 (3), and [Ni(bipy)3]AgBiBr6 (4). Compounds 1–4 feature discrete [AgBiX6]n2n– anions, exhibiting three polymorphisms that may be ascribed to the different stackings and the flexible condensations of [BiX6] octahedrons and [AgX4] tetrahedra/[AgX3] triangles. UV–vis diffuse reflectance analyses reveal that they are narrow band gap semiconductor materials (ca. 1.82–2.13 eV). Intriguingly, the title compounds display excellent photoelectrical switching properties, with photocurrent density following the order 3 > 4 > 2 > 1. In addition, the comparative studies of intermolecular interactions, theoretical band structures, density of states, and effective masses of three polymorphisms have also been investigated.
研究领域:
无机化学
·
材料科学
·
理论计算
✓ 已验证
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）