COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2023
·
IF 5.2
Jing Sun,Zhichang Ma,Hemeiling Cai,Junwei Di
A photoelectrochemical dopamine sensor based on BiOI and AuAgNPs nanoparticles modified indium tin oxide (ITO) electrode was prepared successfully. The noble metal material AuAg significantly improved the shortcomings of poor surface conductivity and easy recombination of photogenerated electron holes in BiOI. The prepared electrode generated a significantly enhanced and stable photocurrent signal under Xe lamp irradiation. In addition, in weak acidic electrolyte solution , dopamine molecules were protonated and preferent existed in the form of cations, which were easily attracted by electrostatic and adsorbed on the surface of negatively charged AuAgNPs. As an electron donor , DA is vulnerable to oxidation to DA + by BiOI holes, resulting in an increased anodic photocurrent. The detection limit was 0.3 pM (S/N = 3) and the dopamine concentration exhibited a nice linear relationship between 1 pM and 0.1 μM under ideal circumstances. The dopamine photoelectrochemical sensor shown strong sensitivity, a broad linearity range, and good selectivity against potential uric acid and ascorbic acid interference. This work provides a promising PEC detection platform for the detection of small and medium-sized molecules in biological analysis.
研究领域:
生物分析
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材料科学
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医学检测
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产品关联
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
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2019
·Vol. 30
·期 20
·19069-19076
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IF 2.195
Yan Qishe,Wang Peiying,Guo Yuan,Chen Yongyang,Si Yushan,Zhang Menghan
The series of novel visible-light-driven ZnMoO 4 /BiOI heterojunctions were successfully fabricated via in situ solvothermal directly growth of BiOI on the surface of ZnMoO 4 plate-like, and the ratio of composite was optimized by increasing of ZnMoO 4 loading. The phase, morphology and optical characteristics of obtained ZnMoO 4 /BiOI heterojunctions were systematically characterized using several analytical measures. The photocatalytic performance was assessed by degrading tetracycline (TC) under visible light irradiation. The results showed that the 30 wt% ZnMoO 4 /BiOI (ZB-30) composite exhibited highest photocatalytic performance than others. The enhanced photocatalytic efficiency could be attributed to the appropriate band gap of composites, strong visible light response, the formation of heterojunctions with close interface contact and generation and separation of photoinduced carriers. The trapping experiments indicated that · O 2 − , h + and · OH radicals played distinct parts in the photodegradation process, and · O 2 − radicals was the dominant specie. In addition, a probable photocatalytic mechanism of the fabricated composites was also put forward.
研究领域:
环境科学
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材料科学
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DOI
高影响因子
JOURNAL OF ENVIRONMENTAL MANAGEMENT
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2025
·
IF 8.4
Jiayi Wang,Penggang Ren,Ying Zhang,Zihang Cai,Zhengyan Chen,Yanling Jin,Zhengzheng Guo
BiOI is a promising photocatalyst due to its exceptional visible light response and high absorption coefficient; however, its performance is hindered by the rapid recombination of electron-hole (e − -h + ) pairs. Herein, a 2D/3D BiOI/g-C 3 N 4 S-scheme heterojunction catalyst was designed and constructed through the alkali etching strategy and subsequent microwave-assisted hydrothermal strategy. The abundant surface active sites and matched band gap of g-C 3 N 4 prepared through alkali etching facilitates anchoring of BiOI nanosheets, contact with contaminants and construction of heterojunctions. 2D/3D S-scheme heterojunction substantially promote electron-hole (e − -h + ) pairs separation and transfer. Profited from their synergistic effects, the 2D/3D BiOI/g-C 3 N 4 heterojunction delivers superior photocatalytic activity toward four different types of pollutants: methylene blue (91.7 %), tetracycline (91.9 %), eosin y (90.9 %) and methyl orange (97.7 %), and demonstrates excellent cyclic stability after seven methylene blue cyclic degradation experiments. Furthermore, BiOI/g-C 3 N 4 has shown satisfactory practicability in many simulation experiments, such as coexisting cations, different pH and real water. A feasible strategy to prepare a visible-light-driven multidimensional coordinated S-scheme heterojunction photocatalyst is provided in this work.
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
PubMed
高影响因子
MATERIALS RESEARCH BULLETIN
·
2015
·
IF 2.288
Weicheng Xu,Jianzhang Fang,Ximiao Zhu,Zhanqiang Fang,Chaoping Cen
A series of novel p−n junction photocatalysts BiOI/Bi 2 Sn 2 O 7 (BiOI/BSO) were successfully fabricated via a facile hydrothermal method. The phase structures, morphologies and optical properties of the as-prepared samples were studied by XRD, TEM, HRTEM, BET, XPS, UV–vis DRS and photoluminescence (PL) spectroscopy. The results showed that BiOI/BSO heteronanostructures displayed much higher photocatalytic activity than pure BSO and BiOI for the degradation of rhodamine B (RhB). The best photocatalytic activity of BiOI/BSO with almost 99.9% RhB degradation situated at molar percentage ratio of 4% after 6 h irradiation. The enhanced photocatalytic performance of BiOI/BSO could be mainly attributed to the formation of the heterojunction between p-BiOI and n-BSO, which effectively restrains the recombination of photoinduced electron–hole pairs. Moreover, the study of radical scavengers affirmed that h + and •O 2 − were the primary reactive species for the degradation of RhB.
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
APPLIED SURFACE SCIENCE
·
2024
·
IF 6.3
Pingping Teng,Yinxiao Chen,Nan Lu,Chen Shi,Zhihai Liu,Zheng Zhu,Yang Zhang,Shuai Gao,Sivagunalan Sivanathan,Kang Li
This paper presents a novel flexible PAN/Bi 2 WO 6 /BiOI heterojunction nanofiber, fabricated through electrospinning, as an advanced photocatalyst for the degradation of pollutants. The PAN nanofibers serve a stable and reusable support for the Bi 2 WO 6 /BiOI heterojunctions, which were constructed using a combination of solvothermal and successive ionic layer adsorption and reaction (SILAR) methods. The separation efficiency of the photogenerated electron-hole pairs and photocatalytic degradation efficiency of Rhodamine B under visible light were significantly enhanced by the heterojunction structure. Comprehensive characterizations confirmed the successful formation of the heterostructure and its superior electron transfer capabilities. The study identified superoxide radicals (·O 2 - ) and photogenerated holes (h + ) as key contributors to the photocatalytic process. The optimized nanofiber exhibited a degradation rate constant of 6.529 × 10 -2 min −1 , significantly outperforming its individual components, and maintained high activity over multiple reuse cycles. This research provides a promising approach for designing high-efficiency, recyclable photocatalytic materials with potential applications in environmental remediation.
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
Nanoscale Advances
·
2023
·Vol. 5
·期 7
·1936-1942
·
IF 4.7
Xiujuan Chen,Shaobo Du,Lei Gao,Kejin Shao,Zhan Li,Bin Liu
The effectiveness of photocatalysts can be impacted by the high compounding efficiency of photogenerated carriers, which depends on the morphology of the photocatalyst. Here, a hydrangea-like N–ZnO/BiOI composite has been prepared for achieving efficient photocatalytic degradation of tetracycline hydrochloride (TCH) under visible light. The N–ZnO/BiOI exhibits a high photocatalytic performance, degrading nearly 90% of TCH within 160 min. After 3 cycling runs, the photodegradation efficiency remained above 80%, demonstrating its good recyclability and stability. The major active species at work are superoxide radicals (·O2−) and photo-induced holes (h+) in the photocatalytic degradation of TCH. This work provides not only a new idea for the design of photodegradable materials but also a new method for the effective degradation of organic pollutants.
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
CRYSTENGCOMM
·
2025
·
IF 2.6
Jiangwen Bai,Jiamin Li,Jinmeng Xiang,Chongfeng Guo
The built-in electric field (IEF) between two components of heterojunction has been proven to be capable of efficiently separating photogenerated carriers in photocatalysis. However, the rapid charge accumulation near the interface of heterojunction tends to neutralize this electric field, resulting in the deterioration of the heterojunction performance. Herein, the ferroelectric-based BiFeO3/BiOI-n heterojunctions (BFO/BiOI-n) were prepared utilizing epitaxy growth. The BFO not only endows the heterojunctions with stronger ferroelectric polarization, which was confirmed by the hysteresis loop, but also induces a significant redistribution of carriers, which maintains a stronger IEF in BFO/BiOI-n. Furthermore, the ferroelectric polarization of BFO was further regulated via corona poling and the enlarged ferroelectric polarization was also favorable to improve the photocatalytic performance. The optimal PBFO/BiOI-4 sample delivers a complete degradation of RhB within 30 minutes and a hydrogen evolution rate of 150 µmol·g−1·h−1. The significantly improved photocatalytic performance is attributed to the efficient photogenerated carriers separation synergistically promoted by the IEF in the heterojunction and the polarized electric field (PEF) in BFO. This work provides a feasible scheme for designing ferroelectric-based heterojunction photocatalyst.
研究领域:
材料科学
·
光催化
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产品关联
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2020
·
IF 7.489
Ruisen Jing,Junshan Yang,Shutao Li,Shifeng Zhao,Pengfei Wang,Yunyan Liu,Aiju Liu,Zilin Meng,Hongwei Huang,Zhilei Zhang,Qian Zhang
The use of black phosphorus (BP) nanosheets has attracted much attention in the area of photocatalysis owing to the thickness-tunable bandgap and high carrier mobility. In order to improve the stability of BP nanosheets, poly dimethyldiallyl ammonium chloride (PDDA) is used to passivate the BP nanosheets and change its surface properties. The present study concerns the development of a facile electrostatic assembly method for the construction of a Z-scheme system consisting of PDDA-functionalized BP nanosheets and layered BiOI in order to enhance visible light adsorption and promote electron-hole separation. The morphology, structure and photoelectrochemical properties of the composites are thoroughly characterized and the photocatalytic performances of all the samples were assessed under visible light irradiation. The 5-F-BP/BiOI exhibits excellent photocatalytic activity with removal efficiencies of 97.6% and 90.0% for methylene blue (MB) and tetracycline (TC), respectively. Superoxide radicals (·O 2 – ) were found to be the main organic decomposition products according to species trapping experiments. The photocatalyst presents favorable stability after three catalytic cycles. This study provides new insights into the design of highly efficient Z-scheme photocatalysts based on functionalized BP nanosheets in order to meet environmental demands.
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
PubMed
高影响因子
npj Clean Water
·
2024
·Vol. 7
·期 1
·1-14
·
IF 10.4
Chen Weizi,Xing Zipeng,Zhang Na,Cheng Tao,Ren Bo,Liu Xinyue,Wang Zibin,Li Zhenzi,Zhou Wei
Hierarchical Bi 2 Fe 4 O 9 /BiOI S-scheme nanoflower heterostructures are prepared by hydrothermal method, which exhibit exceptional photo-piezoelectric catalytic performance. The tight binding between the sheets ensures the efficient electron transport, and provides a large interface area and adequate reaction sites for photo-piezoelectric catalytic reactions. At the same time, because the water flow in the water body produces hydraulic shear force on the material, the material produces piezoelectric effect. Bi 2 Fe 4 O 9 /BiOI exhibit a remarkable degradation efficiency of 99.4% for tetracycline and a hydrogen production rate of 4089.36 µmol h −1 g −1 . The observed behavior can be explained by the combined influence of the formation of S-scheme structure and the process of photo-piezoelectric catalysis, confirmed by in-situ XPS, transient/steady-state fluorescence and piezoelectric response force test. The excellent stability of the material suggests its possible use in the sectors of energy and environment. This work introduces novel concepts for the future advancement of photo-piezoelectric synergistic catalysis.
研究领域:
材料科学
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环境科学
·
能源科学
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产品关联
DOI
高影响因子
Nano Life
·
2021
·
IF 0
Yichang Yu,Ziyuyang Zheng,Weiling Liao,Yuan Yao,Feng Peng,Tingting Chen,Jin Wu,Li Feng
A novel spherical N-CQDs/BiOI photocatalyst was successfully synthesized through a facile solvothermal method. The optimization experiments of hydrothermal time and temperature were carried out. The effect of ammonium citrate addition was investigated. The as-synthesized photocatalysts were characterized via X-ray diffraction, scanning and transmission electron microscopy, Fourier transform infrared spectrum and elemental analysis. The adsorption and photocatalytic performance of as-synthesized photocatalysts were studied, 0.2N-CQDs/BiOI showed the best performance. For the removal of anionic dye RhB, adsorption occupied a major position. The maximum adsorption capacity was 97.09 mg/g for RhB. For the removal of cationic dyes X3B, photocatalysis occupied a major position. The photocatalytic activity of 0.2N-CQDs/BiOI was superior to that of nano-TiO 2 under the simulate sunlight irradiation. Different scavengers were used to analyze the effect of active species and photocatalytic degradation mechanism of X3B. The outstanding stability and performance make 0.2N-CQDs/BiOI has highly potential applications in wastewater treatment.
研究领域:
材料科学
·
环境科学
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DOI
CRYSTENGCOMM
·
2011
·Vol. 13
·期 17
·5460-5466
·
IF 4.006
Manying Liu,Lizhi Zhang,Kewei Wang,Zhi Zheng
The Kirkendall effect has gained intense attention and wide acceptance in nanoscience and nanotechnology because it can result in porosity or deformation in the case of the alloying or oxidation of metals. In this work, we report a facile approach to prepare δ-Bi2O3 solid spheres and further convert them to hierarchical BiOI nests for the first time through a solvothermal reaction at low temperature. The δ-Bi2O3 and BiOI samples obtained were characterized by scanning electron microscopy (SEM), transmission electron microscopy (TEM), X-ray powder diffraction (XRD) and X-ray photoelectron spectroscopy (XPS). The formation mechanism has been proposed by emphasizing the Kirkendall effect. We also found that the template of δ-Bi2O3 solid spheres was initially formed by surfactant oleylamine induction. Anion exchange has been confirmed to occur in the reaction involving the Kirkendall effect.
研究领域:
材料科学
·
纳米技术
✓ 已验证
DOI
高影响因子
WATER AIR AND SOIL POLLUTION
·
2024
·Vol. 235
·期 7
·1-20
·
IF 3.8
Wang Bo,Huang Lin,Li Silan,Qi Liqiang
Rhodamine B (RhB), an alkaline cationic organic dye, poses a significant threat to natural water environments. In this investigation, composites of Co 3 O 4 and BiOBr/BiOI were synthesized and evaluated for degradation of RhB under visible light irradiation. The photocatalyst (CBB-2) with a 10wt% Co 3 O 4 composite exhibited superior degradation efficiency, achieving 99.5% within 80 min and maintaining robust stability over four cycles. Meanwhile, after 90 min of light exposure, the mineralization rate of RhB reached 57.23%. A suite of characterization techniques verified the successful synthesis of the dual type-II heterojunction in the composite catalyst and the reinforced interactions among its components, thereby enhancing charge separation efficiency and photoresponsive performance. Free radical quenching experiments elucidated the critical role of •O 2 - and h + as radicals in the photocatalytic reaction process.
研究领域:
环境科学
·
材料科学
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产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）