JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS
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2021
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IF 3.995
Jun Liu,Meng Sun,Meng-Jie Chang,Wen-Na Cui,Cong-Miao Zhang,Fu-Rong Ni,Jing Zhang,Si-Meng Fan,Hui-Ling Du
s We present a simple methodology to construct novel Co-Pi decorated TiO 2 /Bi 4 Ti 3 O 12 nanorod (TiO 2 /BTO@Co-Pi NR) arrays as photoanode for enhanced water splitting. By using successive ionic layer adsorption and reaction (SILAR) method, controllable amounts of BiOI nanoplates were uniformly immobilized on the hydrothermal grown TiO 2 NR arrays on Fluorine-doped tin oxide (FTO) substrate. TiO 2 /BTO NR heterojunction was conveniently obtained by partial conversion of TiO 2 to high crystallized Bi 4 Ti 3 O 12 through a solid-state reaction with BiOI nanoplates at high temperature. Afterwards, Co-Pi nanoparticles were deposited on TiO 2 /BTO by photoelectrical deposition to generate TiO 2 /BTO@Co-Pi composites. Photoelectrochemical (PEC) measurements have demonstrated that the prepared TiO 2 /BTO photoanode exhibits extremely enhanced performance than pristine TiO 2 for PEC water splitting thanks to the increased visible light absorption and photogenerated charge separation efficiency. Moreover, both the photocurrent density and incident photo-to-current conversion efficiency (IPCE) were further improved after the decoration of Co-Pi. This work provides a feasible and low-cost strategy to establish TiO 2 /Bi 4 Ti 3 O 12 based photoelectrode, therefore, is suitable for practical applications.
研究领域:
材料科学
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光电化学
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纳米技术
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太阳能转换
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产品关联
DOI
高影响因子
Journal of Materials Chemistry A
·
2024
·
IF 10.7
Jialin Zhuang,Lingchao Wang,Yingmo Hu,Yechen Wang,Liping Lin,Jiaying Xiao,Yunfan Chen,Xiaowei Li,Huiqiang Liu,Qian Zhang,Qi An
Photopiezocatalysts can take advantage of both solar light and environmental mechanical energy, holding high significance in building a sustainable society. However, designing high potent photopiezocatalysts remains challenging. In this study, we propose the asymmetric ternary heterojunction as an efficient strategy for achieving effective photopiezocatalysts. The BTO/PPy/TiO2 catalyst composed of BaTiO3 (BTO) and TiO2 nanosheets and polypyrrole (PPy) nanoparticles present both enhanced asymmetric interfacial charge separation as well as deformability under mechanical stimuli, leading to appealing photopiezocatalytic capabilities. The d33 of the ternary BTO/PPy/TiO2 heterojunction is 3.1 times that of the binary BTO/TiO2 counterparts. In-situ synchrotron-radiation-IR measurements indicates that electric fields excite electrons to higher energy levels and lead to larger electron densities in the heterojunction. The piezoelectric fields also enhance charge separations. Using cycled assembly, the ternary BTO/PPy/TiO2 heterojunctions are facilely constructed on a copper mesh substrate, and its application in effective photopiezocatalytic degradation reactions are demonstrated. We expect the study elucidate the mechanism underlining efficient energy conversion and application in the photopiezocatalytically active asymmetric heterojunction and inspire the design of efficient catalysts.
研究领域:
材料科学
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催化
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能量转换
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纳米技术
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环境科学
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DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
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2022
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IF 6.371
Feifei Zhang,Wei Shi,Shangyi Guan,Yugen Xu,Heng Yang,Hao Chen,Jie Xing,Hong Liu,Qiang Chen
Bi 4 Ti 3 O 12 (BIT), a typical layered-structure ferroelectric with a high Curie temperature ( T C ), is a promising material for high-temperature sensors. Herein, W/Cr co-substitution at the B-site of BIT ceramics (BITWC100 x ) is carried out to investigate the phase structure, domain structure, and electrical properties. The W/Cr addition apparently reduces the concentration of oxygen vacancies , effectively improving the ferroelectric and piezoelectric properties as well as the resistivity of the BIT ceramics. The BITWC2 ceramic exhibits a high piezoelectric coefficient ( d 33 = 31.1 pC/N), a moderate T C (651 °C), a large remnant polarization ( P r = 12.2 μC cm −1 ), and a prominent direct current resistivity (5.49 ×10 6 Ω·cm at 500 °C). Moreover, the BITWC2 ceramic possesses a large d 33 of 26.6 pC/N at an annealing temperature of 600 °C, indicating the excellent thermal stability of the piezoelectric coefficient. Overall, the BITWC100 x ceramics can be used in piezoelectric devices at temperatures up to 500 °C.
研究领域:
材料科学
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电子工程
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产品关联
DOI
高影响因子
ADVANCED POWDER TECHNOLOGY
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2019
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IF 3.25
Xiqing Liu,Zhiping Zhou,Yang Lu,Tao Wang,Pengwei Huo,Yongsheng Yan
In this work, a simple method to prepare defect two-dimension (2D) Bi 4 Ti 3 O 12 nanosheets material by NaBH 4 reduction with Argon atmosphere was reported. The results of EPR and XPS demonstrated that the presence of oxygen vacancy in Bi 4 Ti 3 O 12 , which resulted in color changed and extend photon-absorbance. By comparing to pristine Bi 4 Ti 3 O 12 , the black Bi 4 Ti 3 O 12 exhibited higher photocatalytic activity to pollutants. The mechanism was also proposed for exploring the defect in the photocatalytic process.
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
JOURNAL OF ALLOYS AND COMPOUNDS
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2026
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IF 6.7
Meidan Que,Jiaojiao Zheng,Xiangwei Bai,Ruochen Shi,Peihong Ma,Xun Sun,Jun Xu,Yao Wang
Bi 4 Ti 3 O 12 is a bismuth-based photocatalyst that belongs to the Aurivillius family of compounds, and it has garnered widespread attention in the field of photocatalysis due to its unique layered structure. However, it is dominated by single-electron-transfer during the reaction, which hinders the deep reduction of CO 2 to CH 4 and limits catalytic performance. In this work, Bi 4 Ti 3 O 12 was modified through the in-situ loading of Bi 0 metallic nanoparticles and Yb 3+ doped. Experimental results confirm that the Bi/Bi 3.99 Yb 0.01 Ti 3 O 12 exhibits superior photocatalytic activity, with CO and CH 4 production rates of 5.70 μmol g −1 h −1 and 5.32 μmol g −1 h −1 , respectively. Mechanistic investigations reveal that the Ohmic contact between Bi 0 and Bi 4 Ti 3 O 12 improves electron transport efficiency. Meanwhile, the constructed O 2 p -Yb 4 f -Yb 5 d -Ti 3 d electron-transfer bridge promotes multi-electron reaction kinetics and suppresses photogenerated carrier recombination, fundamentally improving the selectivity of CO 2 methanation. This study clarifies the electronic modulation mechanism induced by rare-earth doped, providing a feasible strategy and technical reference for the design of high-performance photocatalysts toward efficient CO 2 methanation.
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高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
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2025
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IF 9
Zhiwen Hu,Huiying Zhang,Yulong Yang,Qifu Bao,Weixia Dong
Photocatalysis exhibits superior catalytic performance, but its application in wastewater treatment faces challenges of water quality impact, limited removal efficiency, and instability. Piezo-catalysis, as a green and low-carbon catalytic technology, has great potential for wastewater treatment. In this study, we prepared a dandelion-like Bi 4 Ti 3 O 12 /BaTiO 3 catalyst via a template-free and one-step solvothermal method. The hierarchical microstructure assembled from nanosheets and nanoparticles was formed due to the shear effect of potassium hydroxide (KOH) and directional adsorption during the reaction process, and it has a high specific surface area and outstanding piezo-photocatalytic performance compared to individual Bi 4 Ti 3 O 12 or BaTiO 3 catalysts. The piezo-photocatalytic degradation efficiency of dyes by Bi 4 Ti 3 O 12 /BaTiO 3 reaches 99.5 %, and demonstrates excellent stability and wide applicability. This result was ascribed to the synergistic effect of heterojunction band structure and piezoelectric properties. Furthermore, the removal mechanism analysis indicates that the holes (h + ) and superoxide radical (O 2 − ) play a major role in the piezo-photocatalytic degradation of dyes. This work presents a novel method for developing efficient piezo-photocatalytic composite catalysts with a broad prospect for wastewater treatment.
研究领域:
材料科学
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环境工程
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纳米催化
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物理化学
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能源与环境材料
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产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
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2026
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IF 13.2
Ruihan Du,Shuyi Yu,Lu Kang,Longyun Li,Chunli Kang
Traditional water treatment methods still face limitations in addressing environmental and health concerns posed by antibiotic pollutants. Piezoelectric catalysis, as an emerging environmental remediation technology, demonstrates potential in this regard due to its highly efficient catalytic activity. Based on this, this study constructed a binary n-n Type-II heterojunction piezoelectric catalytic material, Bi 4 Ti 3 O 12 /MoS 2 (BTO/MS), for the efficient removal of ciprofloxacin (CIP). A series of BTO/MS composites were synthesized via a simple hydrothermal method, with the 5%BTO/MS composite exhibiting optimal piezocatalytic performance toward CIP: Under conditions of 100 W ultrasonication for 60 min, the removal rate of 10 mg/L CIP reached 94.46%, with an apparent reaction rate constant of 0.0539 min −1 . This represents a 3.46-fold and 17.39-fold increase over pure MoS 2 and pure Bi 4 Ti 3 O 12 , respectively. The composite structure effectively mitigated MoS 2 nanosheet agglomeration and suppressed electron-hole pair recombination via an n-n Type-II heterojunction, significantly enhancing the piezoelectric catalytic activity of 5%BTO/MS. Electron paramagnetic resonance (EPR) results indicate that singlet oxygen ( 1 O 2 ) and superoxide radical (·O 2 − ) are the dominant reactive oxygen species governing the piezoelectric catalytic degradation process. Simulations using T.E.S.T. software revealed that most intermediates exhibited reduced ecotoxicity compared to the parent compound CIP. Additionally, 5%BTO/MS demonstrated excellent catalytic performance in removing CIP from tap water and lake water matrices, as well as in degrading other organic pollutants, indicating the material's promising application potential in the field of piezoelectric catalytic water purification.
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DOI
高影响因子
ACS ES&T Engineering
·
2025
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IF 6.7
Jiang Wu,Jiawei Liu,Ni Qin,Dinghua Bao
Piezocatalysis driven by mechanical vibration has emerged as a promising approach for environmental remediation and biomedical therapy. Nevertheless, achieving a high catalytic efficiency through rational material design remains a critical challenge. Herein, different from the extensively studied oxygen vacancy strategy, we report a novel cation defect-engineering strategy for the dual enhancement of catalytic and neuro-regenerative performance. This study demonstrates, for the first time, that bismuth vacancies (VBi) act as powerful active sites that modulate the electronic structure and charge transfer dynamics, resulting in remarkable catalytic enhancement and neuronal differentiation capability. Compared with VBi deficient Bi4Ti3O12, VBi-rich Bi4Ti3O12 nanoplates exhibit substantially enhanced piezocatalytic activity, with a 1.7-fold increase in •O2¯ concentration, a 4-fold increase in •OH concentration, and a 17-fold increase in the reaction rate constant. Density functional theory (DFT) calculations reveal that VBi introduces an intermediate defect energy level within the bandgap, thereby facilitating charge separation and reactive species generation. Moreover, under ultrasonic–piezoelectric stimulation, the VBi-rich nanoplates significantly promote neuronal differentiation, underscoring their dual functionality in catalytic and biomedical applications. Collectively, this study provides comprehensive insights into the critical role of cation defect engineering in advancing high-performance piezoelectric materials, thereby establishing a novel and effective paradigm for both environmental remediation and neuronal regenerative applications.
研究领域:
材料科学
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纳米技术
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催化
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生物医学工程
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神经科学
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产品关联
DOI
高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
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2021
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IF 19.503
Qian Zhang,Yuanyu Shi,Xianjin Shi,Tingting Huang,Shuncheng Lee,Yu Huang,Jun-ji Cao
Photo-oxidative NO x removal often encountered with sluggish charge carrier separation kinetics and poor selectivity. Herein, Pd/ferroelectric Bi 4 Ti 3 O 12 nanoflakes (Pd/BTO NF) were constructed to investigate the photo-excited charge separation, O 2 activation and the generated reactive oxygen species (ROS) in dictating NO removal. Results showed that the depolarization field of ferroelectric BTO NF significantly promoted bulk charge separation, leading to boosted NO removal reaction kinetics (10 times higher) for Pd/BTO NF comparing with Pd/TiO 2 . Revealed by electronic paramagnetic resonance and radical scavenging tests, it is observed that the primary O 2 activation species differed among Pd, Ag and Pt supported BTO NF photocatalysts, which resulted in different selectivity. The underlying mechanism of NO photo-oxidative conversion pathway was studied by in situ diffuse reflectance infrared Fourier transform spectroscopy. This work illustrate that metal/ferroelectric interfaces can be tuned to obtain differing O 2 activation species, and notable selectivity changes in photocatalysis mediated environmental remediation reactions.
研究领域:
环境科学
·
材料科学
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DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2021
·
IF 6.707
Tong Liu,Yongjin Li,Zhiyuan Cheng,Yan Peng,Menghan Shen,Shenghong Yang,Yueli Zhang
Spontaneous polarization of ferroelectric is used to promote the separation of photogenerated electrons and holes, showing tremendous potentials of solar-light driven photocatalytic. However, designing a system of efficient response to visible light, remains a fundamental challenge due to rapid recombination of electrons-holes and weak absorption in visible region. Here, we synthetized Bi 4 Ti 3 O 12 /BiOI heterojunction , which BiOI nanosheets selectively deposited on (1 1 0) facets of Bi 4 Ti 3 O 12 by epitaxy growth. The synthetized heterojunction is characterized by phase structures, morphology, and surface chemical state. The results of ferroelectric phase curve illustrate that the construction of heterojunction enhances the ferroelectric properties, which is favorable to improve the separation and recombination processes of carriers. Furthermore, the sample Bi 4 Ti 3 O 12 /BiOI-3 reveals better photocatalytic kinetics in photodegradation of bisphenol A (BPA) under visible-light irradiation, which is about 74.16 and 1.83 times faster than that of pure Bi 4 Ti 3 O 12 and BiOI. This work provides an effective and scalable strategy for designing a system of efficient response to visible light.
研究领域:
材料科学
·
光催化
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纳米材料
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环境化学
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铁电材料
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DOI
高影响因子
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
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能源化学
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DOI
高影响因子
Journal of Environmental Chemical Engineering
·
2026
·Vol. 14
·期 5
·123830
·
IF 7.5
Hongyang Wang,Chengqi Lu,Zilin Cao,Pengchang Sun,Zhongkang Han,Qianhong Shen,Zhongyuan Hu,Xudan Cao,Hui Yang
The pure Bi 4 Ti 3 O 12 with a flower-like morphology followed by the controlled growth of BiOBr through a simple room-temperature ion-exchange process. This strategy enables the Aurivillius-type Bi 4 Ti 3 O 12 and BiOBr share the (Bi 2 O 2 ) 2+ layers at the interface, which demonstrate by first-principles calculations and in-situ XPS. Benefiting from the coherent interface and type-II charge transfer pathway, the heterojunctions exhibited significantly enhanced charge separation, transport efficiency and significantly increasing the yield of photocatalytic reactive species. Thereby, the optimized sample achieved 91.3% degradation of 40 ppm tetracycline hydrochloride, 89.6% degradation of 15 ppm ciprofloxacin within 30 min,and 90.6% sulfamethoxazole after 120 min.Demonstrating superior photocatalytic performance compared to the previously reported analogous photocatalysts in recent years with respect to antibiotic degradation. The degradation efficiency of the as-prepared photocatalyst with a reduction of only 6% after three cycles. Therefore, this simple and scalable strategy of constructing coherent heterojunctions of Bi 4 Ti 3 O 12 /BiOBr exhibits immense potential for practical applications.
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DOI
高影响因子
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