JOURNAL OF NANOPARTICLE RESEARCH
·
2018
·Vol. 20
·期 2
·1-12
·
IF 2.127
Yang Dong,Zou Xiaoyan,Tong Zhenwei,Nan Yanhu,Ding Fei,Jiang Zhongyi
One-dimensional nanotubes have attracted enormous attention due to their specific structure and excellent performance since the carbon nanotube was prepared. In this study, the open-ended SrTiO 3 nanotubes (STNTs) have been fabricated for the first time via an isomorphic conversion strategy using the protonated titanate nanotubes (HTNTs) as the precursor and template under the hydrothermal treatment. The as-prepared STNTs consist of uniform and continuous multilayers, having inner and outer diameters about 8.0 and 13 nm. The STNT formation involves the exchange of Sr 2+ ions with H + ions in HTNTs and then in situ growth of cubic SrTiO 3 crystals by the templating of HTNT frameworks. It is found that the diffusion process of Sr 2+ ions plays a critical role in controlling the nanotube morphology of SrTiO 3 crystals. In addition, the SrTiO 3 nanotubes exhibit high photocatalytic activity for the Cr(VI) reduction, which can reduce nearly 100% Cr(VI) within 6 h under simulated sunlight irradiation. The current strategy may be broadly applicable for fabricating the nanotubes from raw materials without 2D layered nanostructure.
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研究领域:
材料科学
·
纳米技术
·
化学工程
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ELECTRONIC MATERIALS
·
2025
·
IF 2.5
Xiao Zhen,Yang Wutao,Zhu Jing,Sun Peng,Chen Jianfeng,Li Yinyan
Solar-light-responsive strontium titanate (SrTiO 3 ) samples with excellent specific surface area are synthesized via a facile hydrothermal process. The as-prepared samples are inspected by X-ray powder diffraction (XRD) and scanning electron microscopy (SEM) to illustrate the crystalline phase and particle morphology. The SrTiO 3 particles are characterized by the three-dimensional (3D) assembly of numerous highly oriented nanocubes according to oriented attachment and Ostwald ripening, thereby displaying a porous cube-like structure. By adjusting the reaction time, the morphology can be continuously tuned from a cube structure to irregular shape, then to a porous cube-like structure. Owing to the large specific surface area with highly active reaction sites, as well as the high utilization of light arising from reflections in the porous structure, the porous cube-like SrTiO 3 particles exhibit significantly enhanced photocatalytic activity compared to their cubic counterparts for the photocatalytic degradation of organic pollutants. Impressively, the rhodamine B (RhB) degradation rate for the porous cube-like SrTiO 3 particles can reach 96% after reaction for 6 h.
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
CHEMICAL ENGINEERING JOURNAL
·
2022
·
IF 16.744
Chengwen Bin,Xu Hou,Han Yang,Luocheng Liao,Yadan Xie,Hua Wei,Yunya Liu,Xumin Chen,Jie Wang
Flexible dielectric film capacitors with high performance of energy storage has shown great promise as a solution to the flexibility and stability of modern electronics and electric power systems. Herein, a novel relaxor-ferroelectric BiMg 0.5 Ti 0.5 O 3 - x SrTiO 3 (BMT- x STO, x = 0.1, 0.2, 0.3 and 0.4) thin film capacitors are obtained via one-step fabrication on flexible mica substrates. A superior energy storage density of 109.7 J cm −3 and a pretty high efficiency of 80.6% are simultaneously achieved in the BMT-0.3STO film capacitor. At the same time, the energy storage performance can be stable in the temperature range of 25 to 200° C, the wide frequency range of 500 Hz to 10 kHz, and even after 10 8 electrical cycles. In addition, under the bending radii from 16 mm to 4 mm, there is no obvious variation in performance even after 10 4 mechanical fatigue cycles, indicating the super flexibility and stability of the film capacitors. The prominent properties of the BMT-based film capacitor are mainly attributed to the improvement of relaxation behavior by introducing appropriate STO, which are explained by the domain evolution via piezo-response force microscopy and phase field simulation. The present work suggests a new way to obtain lead-free and flexible dielectric film capacitors for flexible energy storage technology.
研究领域:
材料科学
·
能源技术
✓ 已验证
DOI
高影响因子
Solar RRL
·
2023
·Vol. 7
·期 14
·2300259
·
IF 7.9
Lianqing Yu,Xiang Li,Lijie Duan,Yaping Zhang,Haifeng Zhu
Owing to great efficient routes for charge carrier separation and transfer, heterostructure photocatalysts play significant roles in many photocatalytic reactions. Based on the bionic structure, an interesting composite photocatalyst of cadmium sulfide dewdrops on ultrathin strontium titanate branches with oxygen vacancies is successfully constructed by a simple chemical bath deposition method. The oxygen vacancies act as electron traps in the dendritic perovskite SrTiO 3 nanostructure. Meanwhile, the CdS can provide abundant active sites for the hydrogen evolution reaction. The results demonstrate that SrTiO 3 /CdS-5% nanocomposite with oxygen vacancies achieves the highest hydrogen production rate of 4537.9 μmol g −1 h −1 under visible light, which is over 50 times more than that of the single SrTiO 3 with oxygen vacancies (79.36 μmol g −1 h −1 ), pure CdS (81.79 μmol g −1 h −1 ), and more than 750 times that of pure SrTiO 3 (6.132 μmol g −1 h −1 ). Density generalized function theory calculations show that the bandgap values of SrTiO 3 /CdS nanocomposite with oxygen vacancies are narrower than that of the original SrTiO 3 and CdS, in which the electrons flow from CdS to SrTiO 3 , and form an internal electric field at the interface, prolonging the carrier lifetime. Importantly, this work provides a reasonable reference for the preparation of efficient structure-based biomimetic composite photocatalysts.
研究领域:
材料科学
·
环境科学
·
化学工程
✓ 已验证
DOI
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
·
2021
·
IF 10.588
Kang Wu,Juxia Xiong,Yuhai Sun,Junliang Wu,Mingli Fu,Daiqi Ye
Boosting plasma-catalyst synergy to enhance volatile organic compounds (VOCs) decomposition remains a challenge. Herein, rich oxygen vacancies (V O ) were engineered into the SrTiO 3 catalysts through a facile nitrogen incorporation strategy for the plasma-catalytic decomposition of toluene and ethyl acetate. 100% toluene conversion with 81% CO 2 selectivity at a competitive energy efficiency was achieved under ambient conditions. The characterization results and theoretical calculations evidenced that the partial substitution of oxygen by nitrogen triggered the electronic reconstruction and local disorder, thus modulating the electronic properties and coordination structures contributed to the formation of V O -Ti 3+ pairs. Quasi in-situ EPR, operando OES , and operando DRIFTS originally demonstrated that the V O -Ti 3+ pairs as active sites promoted the plasma-catalytic synergy instead of isolated V O . Importantly, the V O -Ti 3+ pairs with favorable electron transfer characteristics energetically preferred to capture and utilize vibrationally excited oxygen species. And the lattice oxygen supplied by the V O -Ti 3+ pairs were more vigorously activated by the plasma to participate in the surface/interface reaction. This work advances our understanding of the real active sites in plasma-catalytic interfacial synergy and thus paving the way for the rational design of efficiently heterogeneous catalysts.
研究领域:
材料科学
·
环境科学
·
催化化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
·
2018
·
IF 4.514
Lingmin Yao,Zhongbin Pan,Jiwei Zhai,Guangzu Zhang,Zhiyu Liu,Yuhua Liu
Inorganic/polymer nanocomposite films have attracted pronounced attention for electric energy storage applications since their high power energy density and fast charge-discharge ability. In this work, the flexible nanocomposite films composed by the paraelectric SrTiO 3 nanofibers (ST NFs) and poly(vinylidene fluoride) (PVDF) were prepared by a solution cast method. The ST NFs, synthesized by an electrospinning method, were coated with a dense and robust dopamine layer which could effectively improve the filler-matrix distributional homogeneity and compatibility. The composite film with an optimized filler content illustrates a high discharge energy density of 9.12 J/cm 3 at 360 MV/m, which is about 625% over the biaxially oriented polypropylenes (BOPP) (1.2 J/cm 3 at 640 MV/m). Moreover, the composite film shows a superior power density of 2.31 MW/cm 3 and ultra-fast discharge speed of 178 ns. Therefore, the present approach might be extended to the fabrication of similar polymeric nanocomposites for high-performance capacitor energy storage devices.
研究领域:
材料科学
·
能源工程
✓ 已验证
DOI
高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
·
2016
·
IF 8.328
Kai Yu,Chenxi Zhang,Yue Chang,Yajun Feng,Zequn Yang,Ting Yang,Lan-Lan Lou,Shuangxi Liu
Three-dimensionally ordered macroporous SrTiO 3 (3DOM-SrTiO 3 ) materials with different pore sizes were originally prepared and employed as photocatalysts in the water splitting for hydrogen generation. These 3DOM-SrTiO 3 photocatalysts were characterized by XRD, SEM, TEM, EDS, DR UV–vis and N 2 sorption . Because of the slow photon effect of 3DOM-SrTiO 3 , notably enhanced efficiency of water splitting for hydrogen evolution was obtained compared with the solid-state SrTiO 3 (SS-SrTiO 3 ) and disordered porous SrTiO 3 (Disorder-SrTiO 3 ). The effect of stop-band on the efficiency of photocatalytic hydrogen production was studied by tuning the pore diameter of 3DOM-SrTiO 3 . It was found that higher hydrogen evolution efficiency could be achieved when the photonic stop-band of 3DOM-SrTiO 3 was overlapped with its band gap, which was further confirmed by the control experiments under certain wavelength light irradiation. 3DOM-SrTiO 3 (270 nm) exhibited the highest photocatalytic hydrogen evolution rate (up to 3599 μmol/g·h), which was 31 times as high as that of SS-SrTiO 3 and 11 times higher than that of Disorder-SrTiO 3 . Furthermore, these 3DOM-SrTiO 3 catalysts were very stable and no obvious loss in photocatalytic efficiency of hydrogen production was observed after five cycles.
研究领域:
材料科学
·
能源化学
✓ 已验证
产品关联
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2025
·
IF 6.9
Xiaoli Ran,Yanlong Gong,Hao Zeng,Yang Bai,Sijie Li,Lei Zhang,Haitao Fu,Xizhong An,Dawei Su,Xiaohong Yang
The photoelectrochemical (PEC) activity of Strontium titanate (SrTiO 3 ) is constrained by its insufficient light absorption and significant carrier recombination. In this study, carbon dots (CDs) are integrated as co-catalysts onto the surface of oxygen-vacancy-doped mesoporous spherical SrTiO 3 nanoparticles to address these limitations and enhance PEC activity. Experimental characterizations and DFT calculations elucidate that the CDs demonstrated significant synergistic enhancements in PEC performance, particularly in band alignment, visible light absorption, and charge carrier transport, which collectively accelerated surface catalytic reactions. Most importantly, the electronic structure of SrTiO 3 was optimized by CDs, and their interfacial interaction plays an important role in enhancing its PEC performance. As a result, the optimal 0.005 %CDs/Sr X TiO 3- δ photoanode achieves a photocurrent density of 1.37 mA/cm 2 at 1.23 V vs. RHE, significantly surpassing that of Sr X TiO 3 -δ (0.73 mA/cm 2 ) and pristine SrTiO 3 (0.109 mA/cm 2 ). Additionally, the incident photon-to-current conversion efficiency (IPCE) reaches 34 % for 0.005 %CDs/Sr X TiO 3 -δ , compared to 18.2 % for Sr X TiO 3 -δ and 2.6 % for SrTiO 3 . These findings present a straightforward and effective method for designing high-performance catalysts for PEC water splitting.
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
LANGMUIR
·
2023
·
IF 3.9
Nan Wang,Zhao-Jian Li,Hong Gao,Ru Li,Xiao-Feng Xu,Tong Li,Yun-Ze Long,Hong-Di Zhang
Traditional SrTiO3 (STO) materials have high brittleness and poor deformation resistance. In this work, macroscopically flexible iron-doped SrTiO3 (SFTO) nanofibrous membranes were prepared by electrospinning and calcination, which can be easily isolated and can maintain integrity to recycle as photocatalysts. Moreover, the SFTO nanofibrous membranes showed enhanced photocatalytic performance under strong acids (pH = 2) and strong alkalis (pH = 12). The SFTO nanofibrous membranes increased the catalytic rate of Congo red (CR) dye by about 10 times in visible light. The mechanism of photocatalytic activity enhancement was discussed by the combined effects of hydroxyl radicals and superoxide radicals. The successful preparation of SFTO nanofibrous membranes has offered a simple and economical approach to photocatalysis as well as environmental remediation.
研究领域:
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
RSC Advances
·
2020
·Vol. 10
·期 70
·42619-42627
·
IF 3.119
Haoshan Wei,Jingyi Cai,Yong Zhang,Xueru Zhang,Elena A. Baranova,Jiewu Cui,Yan Wang,Xia Shu,Yongqiang Qin,Jiaqin Liu,Yucheng Wu
Single crystalline strontium titanate (SrTiO3) submicron cubes have been synthesized based on a molten salt method. The submicron cubes showed superior photocatalytic activity towards both water splitting and carbon dioxide reduction, in which methane (CH4) and hydrogen (H2) were simultaneously produced. The average production rate of methane up to 8 h is 4.39 μmol g−1 h−1 but drops to 0.46 μmol g−1 h−1. However, the average production rate of hydrogen is 14.52 before 8 h but then increases to 120.23 μmol g−1 h−1 after 8 h. The rate change of the two processes confirms the competition between the H2O splitting and CO2 reduction reactions. Band structure and surface characteristics of the SrTiO3 submicron cubes were characterized by diffuse reflective UV-Vis spectroscopy, Mott–Schottky analysis, X-ray photoelectron spectroscopy (XPS) and Fourier transform infrared spectroscopy (FTIR). The results reveal that the simultaneous and competitive production of methane and hydrogen is due to a thermodynamics factor, as well as the competition between the adsorption of carbon dioxide and water molecules on the surface of the faceted SrTiO3. This work demonstrates that SrTiO3 photocatalysts are efficient in producing sustainable fuels via water splitting and carbon dioxide reduction reactions.
研究领域:
材料科学
·
环境科学
·
能源科学
✓ 已验证
DOI
高影响因子
Journal of Energy Chemistry
·
2022
·
IF 13.599
Xianwen Zhang,Zheng Li,Bin Zeng,Can Li,Hongxian Han
Understanding the processes of charge generation, transfer and capture is important for the design and synthesis of efficient photocatalysts. In this work, light-induced charge separation and effect of O 2 on electron transfer processes in SrTiO 3 were investigated by electron paramagnetic resonance (EPR). It was found that photoinduced electron transfer from O 2− to Ti 4+ produced Ti 3+ and O − redox radical pairs under vacuum condition. Under oxygen atmosphere, however, surface bound superoxide radicals O 2 − were formed by electron reduction of adsorbed oxygen at initial photoirradiation stage, and quenched by the reverse electron transfer to Ti 4+ upon further photoirradiation. Formation of long-lived charge separation associated [Ti 3+ ---O − ] species and the reversibility of surface bound superoxide radicals mediating the processes of photogenerated electrons may be accountable for the high activity of SrTiO 3 in photocatalytic water splitting reaction.
研究领域:
材料科学
·
物理化学
✓ 已验证
产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2020
·
IF 5.774
Xiang Yu,Jiaoming Wang,Xionghui Fu,Hui Meng,Yi Zhu,Yuanming Zhang
In this work, we successfully constructed visible-light-driven Z-scheme SrTiO 3 /Ag/Ag 3 PO 4 photocatalyst with oxygen vacancies, which exhibited highly enhanced performance for antibiotic tetracycline (TC) photodegradation compared with pure Ag 3 PO 4 and SrTiO 3 . SrTiO 3 /Ag/Ag 3 PO 4 (1:3) exhibited the best photocatalytic performance under visible light illumination, the rate constant k of which was about 2.72 and 18.55 folds higher than that of Ag 3 PO 4 and SrTiO 3 , respectively. No significant deactivation of photocatalytic performance over SrTiO 3 /Ag/Ag 3 PO 4 (1:3) after five consecutive cycles confirmed an enhanced stability, compared to pure Ag 3 PO 4 , which showed 22.1% decrease in photocatalytic activity under the same condition. The significantly boosted photocatalytic activity of the composites could be ascribed to the improved stability of Ag 3 PO 4 , superior carrier separation efficiency and higher redox capacities resulted from Z-scheme, in which metal Ag played the role as the charge transmission-bridge to quench electrons from conducting level of Ag 3 PO 4 with holes from defect levels of SrTiO 3 with oxygen vacancies under visible light illumination. Furthermore, a possible degradation pathway for TC was also proposed based on HPLC-MS. The work offered an excellent reference for further understanding and constructing Z-scheme heterojunctions which were potential candidates for degrading antibiotics in environmental purification.
研究领域:
环境科学
·
材料科学
✓ 已验证
DOI
高影响因子
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