ADVANCED FUNCTIONAL MATERIALS
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2022
·Vol. 32
·期 25
·2201276
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IF 19.924
Peixian Lei,Huan Duan,Ling Qin,Xianhua Wei,Rui Tao,Zegao Wang,Feng Guo,Menglin Song,Wenjing Jie,Jianhua Hao
Artificial optoelectronic synapses with both electrical and light-induced synaptic behaviors have recently been studied for applications in neuromorphic computing and artificial vision systems. However, the combination of visual perception and high-performance information processing capabilities still faces challenges. In this work, the authors demonstrate a memristor based on 2D bismuth oxyiodide (BiOI) nanosheets that can exhibit bipolar resistive switching (RS) performance as well as electrical and light-induced synaptic plasticity eminently suitable for low-power optoelectronic synapses. The fabricated memristor exhibits high-performance RS behaviors with a high ON/OFF ratio up to 10 5 , an ultralow SET voltage of ≈0.05 V which is one order of magnitude lower than that of most reported memristors based on 2D materials, and low power consumption. Furthermore, the memristor demonstrates not only electrical voltage-driven long-term potentiation, depression plasticity, and paired-pulse facilitation, but also light-induced short- and long-term plasticity. Moreover, the photonic synapse can be used to simulate the “learning experience” behaviors of human brain. Consequently, not only the memristor based on BiOI nanosheets shows ultra-low SET voltage and low-power consumption, but also the optoelectronic synapse provides new material and strategy to construct low-power retina-like vision sensors with functions of perceiving and processing information.
研究领域:
神经形态电子学
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光电子学
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纳米材料
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人工智能硬件
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电阻开关器件
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DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
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2021
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IF 5.316
Xiuru Yang,Zhi Chen,Wan Zhao,Chunxi Liu,Xiaoxiao Qian,Wenya Chang,Tao Sun,Cai Shen,Guoying Wei
Porous-hydrangea x%BiOBr/BiOI n-n heterojunction with ordered morphology was successfully prepared through a simple solvothermal process using Bi(NO 3 ) 3 ·5H 2 O, KBr, BiOI, and ethylene glycol as the precursors. The prepared x%BiOBr/BiOI (x = 2, 5, 10, 15 mol ratio) n-n heterojunctions exhibit enhanced photodegradation properties during treatment of tetracycline hydrochloride (TC-HCl) under visible light irradiation. The highest efficiency at optimized x = 5 is 1.3-, 1.7- and 1.3-fold higher than that of the pristine BiOI, BiOBr, and commercial titanium dioxide (P25), respectively. The improved photocatalytic performance was assigned to the optimized charge-separation properties of n-n heterojunction. However, over-loading of BiOBr upon BiOI may restrain the access of light to BiOI, which could limit the light absorption. The active species have been investigated by trapping experiments and it was found that holes (h + ) and superoxide radicals (∙O 2 - ) were mainly responsible for the photodegradation of TC-HCl. Additionally, the structure and activity relationship were systemically investigated, and the formation of n-n heterojunction is discussed accordingly. The photodegradation of TC-HCl is proved to be a complete mineralization process and the reaction mechanism is also proposed.
研究领域:
材料科学
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环境科学
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光化学
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纳米技术
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产品关联
DOI
高影响因子
Materials Science & Engineering C-Materials for Biological Applications
·
2019
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IF 4.959
Zhu Mengting,Tonni Agustiono Kurniawan,You Yanping,Ram Avtar,Mohd Hafiz Dzarfan Othman
Bisphenol A (BPA) is a refractory pollutant presents in water body that possesses serious threats to living organisms. To deal with it, we investigate and evaluate the effectiveness of GO@BiOI/Bi 2 WO 6 composite as a novel photocatalyst for BPA removal from aqueous solutions under UV–vis irradiation. To enhance its removal for BPA, the surface of BiOI/Bi 2 WO 6 is modified with graphene oxide (GO). This composite is named as ‘GO@BiOI/Bi 2 WO 6 ’. Changes in its physico-chemical properties after surface modification with GO are characterized by XRD, FTIR, FESEM-EDS, XPS, PL, and BET methods. Optimized conditions of BPA degradation by the composite are determined under identical conditions. Photodegradation pathways of BPA and its removal mechanisms by the same composite are presented. It is obvious that the GO@BiOI/Bi 2 WO 6 has demonstrated its potential as a promising photocatalyst for BPA removal under UV–vis irradiation. About 81% of BPA removal is attained by the GO@BiOI/Bi 2 WO 6 under optimized conditions (10 mg/L of BPA, 0.5 g/L of dose, pH 7 and 5 h of reaction time). The oxidation by-products of BPA degradation include p -hydroquinone or 4-(1-hydroxy-1-methyl-ethyl)-phenol. In spite of its performance, the treated effluents are still unable to meet the maximum discharge limit of <1 mg/L set by national legislation. Therefore, subsequent biological processes are essential to maximize its biodegradation in the wastewater samples before their discharge into waterbody.
研究领域:
环境科学
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材料科学
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化学工程
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产品关联
DOI
PubMed
高影响因子
TALANTA
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2025
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IF 6.1
Meixin Li,Zongbo Song,Shanshan Li,Mati Ullah Khan,Yongzhi Wang,Yunsi Xu,Shun Wang,Ling Kong,Zhiwei Chen,Feng Sang
Patulin (PAT), a potent mycotoxin commonly found in fruit and vegetable products, represents a critical threat to food safety and public health. Its cytotoxicity arises from the disruption of intracellular signaling pathways and oxidative balance, leading to gastrointestinal impairment, immune suppression, and systemic toxicity. To mitigate these risks, we present a label-free photoelectrochemical (PEC) aptasensor for ultrasensitive PAT detection, employing an in situ-synthesized Ag 2 S quantum dot (QD)-sensitized BiOI/Bi 2 O 3 heterojunction. The BiOI/Bi 2 O 3 heterostructure enhanced charge carrier separation, while the in situ-anchored Ag 2 S QDs functioned as effective photosensitizers, significantly amplifying the PEC response. Integrated with a PAT-specific aptamer, the sensor demonstrated selective target recognition, achieving a linear detection range from 0.001 to 100 ng/mL and a remarkably low detection limit of 0.56 pg/mL. The aptasensor exhibited high selectivity against structurally similar mycotoxins, excellent stability (94.2% signal retention through 15 on/off light irradiation cycles). Successful PAT quantification in spiked apple juice samples confirmed its practicality for real-world applications. This study establishes a sensitive, cost-effective, and reliable analytical tool for monitoring mycotoxins in food safety protocols.
研究领域:
食品安全
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分析化学
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纳米技术
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生物传感器
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毒理学
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光电化学
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产品关联
DOI
PubMed
高影响因子
ACS Applied Nano Materials
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2023
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IF 5.9
Lei Zhong,Weisong Li,Guoning Li,Zhaoyu Feng,Chunjian Xu
I-deficient nanoplatelet bismuth oxyiodide (BiOI) microflowers were successfully synthesized via a one-pot solvothermal method using NaOH. Results demonstrated that OH– played a key role in regulating the morphology, pore structure, and energy band structure of the prepared samples. As the volume of NaOH increased, the size of the BiOI microflowers gradually decreased, and the specific surface area and pore volume increased, providing more accessible active sites for photocatalytic reactions. Additionally, some iodine atoms in B-7 (i.e., 7 mL of a 1.0 M NaOH solution was added during the synthesis process) were replaced by hydroxide ions, affording B-7 with slight defects. The loss of iodine atoms shifted the valence band maximum (VBM) from 1.372 eV for the pristine BiOI (B-0) to 1.596 eV for I-deficient BiOI (B-7). The lowered VBM provides more oxidative holes, which is favorable for the oxidation reaction. The photocatalytic activities of the prepared samples were evaluated via the photodegradation of various organic pollutants, such as methyl orange, Rhodamine B, and phenol, under visible light. Owing to the higher surface area and pore volume, lower VBM, and presence of surface defects, B-7 exhibited the highest degradation efficiency among all of the samples.
研究领域:
材料科学
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环境科学
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化学
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产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
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2020
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IF 4.65
Jiaying Li,Xiang Yu,Yi Zhu,Xionghui Fu,Yuanming Zhang
A novel 3D-2D-3D BiOI/porous g-C 3 N 4 /graphene hydrogel (BPG) composite photocatalyst was synthesized via a two-step hydrothermal method and shows a synergy of adsorption and photocatalysis . In comparison with bulk g-C 3 N 4 , 2D porous g-C 3 N 4 (pCN) exhibited not only shortened diffusion distance for photogenerated carrier transport but also large contact area for rapid interfacial charge separation. Nevertheless, the photocatalytic performance was far from satisfactory due to the poor light harvesting. Incorporating 3D flower-like BiOI with 2D pCN to form a heterojunction was found to be an efficiency way for improving light harvesting, while charge separation efficiency was also enhanced. 3D graphene hydrogel, in which the effective photocatalyst 3D-2D BiOI/pCN heterojunction was homogenously distributed, not only revealed excellent adsorption capability and bulk electron transfer but also provided simplicity of separation and recovery. Consequently, in static system, the degradation efficiency of methylene blue (MB) and the typical antibiotic levofloxacin hydrochloride (LVF) was 7.2 and 2.7 times as high as that for BiOI. In flow system, the pollutants could be constantly degraded without separation with the removal rates about 1.54 and 1.67 times higher than those of BiOI, which kept unchanged for 30 h. The construction of 3D-2D-3D BPG composite combined the excellent adsorption capacity of GH with the photocatalytic activity of BiOI/pCN heterojunction, resulting in a high removal efficiency towards pollutants. This work provided deep insight into design and fabrication of 3D hydrogel composites with excellent synergy of adsorption and photocatalytic properties.
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 Materials Chemistry B
·
2023
·Vol. 11
·期 23
·5123-5130
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IF 7
Hong Wang,Mengmeng Gu,Menghua Yan,Xiuming Wu,Yuming Dong,Guang-Li Wang
Cathodic photoelectrochemistry, a research hotspot in state-of-art bioassays, is generally circumscribed by its monotonous signal transduction tactic of photoinduced electron transfer (PET) mechanism, which significantly narrows the scope of its applications. In this study, we reveal the surface oxygen vacancy (VO) formation elicited by the spontaneous coordination of catechol (CA) onto the surface of BiOI nanoplates for the innovative operation of the cathodic PEC signal transduction tactic. The in situ-generated VO functions as a carrier separation center to efficiently promote photocurrent generation. Taking tyrosinase (TYR) and Escherichia coli O157:H7 (E. coli O157:H7) as model targets, the established signal transduction tactic was validated as efficient and sensitive for the detection of the two targets with linear ranges from 1.0 × 10−4 to 1.0 U mL−1 and 5.0 to 1.0 × 106 CFU mL−1, respectively. Low-detection limits of 1.0 × 10−4 U mL−1 and 3.0 CFU mL−1 were achieved for TYR and E. coli O157:H7, respectively. This study opens up a new perspective of in situ generated surface VO on semiconductors, which underlies an innovative PEC signal transduction mechanism with convincing analytical performance. Hopefully, it might encourage more explorations of new methodologies for introducing surface vacancies with exquisite applications.
研究领域:
光电化学
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生物分析
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分析化学
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纳米材料
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生物传感器
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产品关联
DOI
PubMed
高影响因子
Materials Advances
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2025
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IF 4.7
Xinxin Li,Lianjie Du,Zhou Wan,Doudou Xu,Chen Liu
In this study, novel ZnO/BiOI/AgI ternary heterojunction photocatalysts were synthesized via a facile precipitation method to address challenges in organic pollutant degradation and microbial disinfection under visible light irradiation. The composites were systematically characterized (XRD, SEM, TEM, XPS, BET, UV-vis DRS, and PL), showing significantly enhanced visible light absorption, efficient charge carrier separation, and superior photocatalytic performance, compared to binary and single-component counterparts. The optimized ZnO/BiOI/AgI-3030 sample achieved 98.1% degradation of Rhodamine B (RhB) and 59.1% degradation of Norfloxacin (NOR) within 3 hours, attributed to the synergistic effects of the heterojunction structure, which facilitated efficient charge transfer and promoted the generation of reactive oxygen species (ROS). Furthermore, the composite demonstrated remarkable antibacterial activity against Escherichia coli (E. coli), Staphylococcus aureus (S. aureus), and methicillin-resistant Staphylococcus aureus (MRSA), with bactericidal rates exceeding 99.8%. Cytotoxicity assays revealed 88.79% inhibition of DLD-1 colorectal cancer cells. Mechanistic studies confirmed the formation of a unique n–p–n heterostructure, enabling effective charge carrier separation and strong redox capabilities. Additionally, the photocatalysts exhibited excellent stability and reusability over four consecutive degradation cycles, maintaining high catalytic efficiency. These findings underscore the potential of ZnO/BiOI/AgI ternary composites as efficient and sustainable photocatalysts for environmental remediation and antimicrobial applications.
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DOI
高影响因子
Journal of Water Process Engineering
·
2022
·
IF 7.34
Ganghong Huang,Zishun Li,Kun Liu,Yingjie Zhang,Xuekun Tang,Qian Peng,Jing Huang,Guofan Zhang
In this work, a bismuth metal-organic framework is used as a modifier to prepare a modified BiOI photocatalytic material (BBI-2), which is then characterized via X-ray diffraction, Fourier-transform infrared spectroscopy, scanning electron microscopy, transmission electron microscopy , N 2 adsorption-desorption isotherm, and X-ray photoelectron spectroscopy. In photocatalytic degradation tests, much higher photocatalytic activity is found for BBI-2 than for pure BiOI. After 75 min of visible-light irradiation, the degradation ratio of 10 mg/L rhodamine B by 100 mg/L BBI-2 can reach 97.14%. In addition, BBI-2 shows good performance in terms of pH applicability and circulation. Photoelectric analysis, free-radical analysis, and energy band analysis make clear that the improvement in the visible-light photocatalytic performance of BBI-2 is mainly due to the optimization of its morphology, size, specific surface area, energy band position, and the transmission and separation properties of photogenerated carriers. The active substances that play a significant role in the photocatalytic system are also determined. A study of biological effects finds that BBI-2 shows distinct photocatalytic antibacterial activity under visible-light irradiation, low cytotoxicity to human primary fibroblasts, and good compatibility with defibrinated rabbit blood.
研究领域:
材料科学
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环境科学
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化学
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生物技术
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产品关联
DOI
高影响因子
Journal of Environmental Sciences
·
2022
·
IF 6.796
Wenxia Wang,Zhen Li,Kailin Wu,Guodong Dai,Qingping Chen,Lihua Zhou,Junxia Zheng,Liang Ma,Guiying Li,Wanjun Wang,Taicheng An
Rational design and synthesis of highly efficient and robust photocatalysts with positive exciton splitting and interfacial charge transfer for environmental applications is critical. Herein, aiming at overcoming the common shortcomings of traditional photocatalysts such as weak photoresponsivity, rapid combination of photo-generated carriers and unstable structure, a novel Ag-bridged dual Z-scheme g-C 3 N 4 /BiOI/AgI plasmonic heterojunction was successfully synthesized using a facile method. Results showed that Ag-AgI nanoparticles and three-dimensional (3D) BiOI microspheres were decorated highly uniformly on the 3D porous g-C 3 N 4 nanosheet, resulting in a higher specific surface area and abundant active sites. The optimized 3D porous dual Z-scheme g-C 3 N 4 /BiOI/Ag-AgI manifested exceptional photocatalytic degradation efficiency of tetracycline (TC) in water with approximately 91.8% degradation efficiency within 165 min, outperforming majority of the reported g-C 3 N 4 -based photocatalysts. Moreover, g-C 3 N 4 /BiOI/Ag-AgI exhibited good stability in terms of activity and structure. In-depth radical scavenging and electron paramagnetic resonance (EPR) analyses confirmed the relative contributions of various scavengers. Mechanism analysis indicated that the improved photocatalytic performance and stability were ascribed to the highly ordered 3D porous framework, fast electron transfer of dual Z-scheme heterojunction, desirable photocatalytic performance of BiOI/AgI and synergistic effect of Ag plasmas. Therefore, the 3D porous Z-scheme g-C 3 N 4 /BiOI/Ag-AgI heterojunction had a good prospect for applications in water remediation. The current work provides new insight and useful guidance for designing novel structural photocatalysts for environment-related applications.
研究领域:
环境科学
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材料科学
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化学
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产品关联
DOI
PubMed
高影响因子
MICROCHEMICAL JOURNAL
·
2025
·
IF 5.1
Meixin Li,Pengfei Yu,Shanshan Li,Mati Ullah Khan,Shun Wang,Jiaqi Tian,Shuang Liu,Ling Kong,Zhiwei Chen
Aflatoxin B 1 (AFB 1 ) and ochratoxin A (OTA) are highly toxic mycotoxins prevalent in food and feed, posing severe threats to human and animal health. This work presents an innovative photoelectrochemical aptamer sensor for the detection of AFB 1 and OTA, leveraging a ternary BiOBr/Bi/BiOI heterojunction and Ag 2 S quantum dot-mediated signal amplification. The BiOBr/Bi/BiOI composite was synthesized via a one-step hydrothermal reduction using l -ascorbic acid (AA), exhibiting a high specific surface area to enhance biorecognition efficiency. In situ-assembled Ag 2 S quantum dots amplified photocurrent responses, while a single aptamer probe enabled specific dual-target recognition. Under optimized conditions, the sensor achieved exceptional sensitivity: linear ranges of 0.001–100 ng·mL −1 for both mycotoxins, with detection limits of 4.34 fg·mL −1 (AFB 1 ) and 13.54 fg·mL −1 (OTA). Validation in complex food matrices confirmed high accuracy and robustness. This platform not only provides a reliable method for mycotoxin monitoring but also establishes a versatile design paradigm for multiplexed detection of food contaminants.
研究领域:
分析化学
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食品科学
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生物传感器
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纳米技术
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环境监测
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产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
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2021
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IF 7.312
Tongtong Zhang,Yuqi Wang,Xin Xie,Yanning Shao,Yuhao Zeng,Siyu Zhang,Qishe Yan,Zhongjun Li
A dual Z-scheme carbon-bridged g-C 3 N 4 /BiOI-Bi 2 O 3 photocatalyst were synthesized by simple solvothermal and calcination methods. The physical and chemical properties of prepared samples were explored via a series of characterization and Density Functional Theory (DFT) calculations. The formation mechanism of the composite photocatalyst was systematically studied and the formation process was simulated. Under the irradiation of visible light, 10% carbon-bridged g-C 3 N 4 /BiOI-Bi 2 O 3 exhibited the best photocatalytic performance. And the kinetics reaction model was followed pseudo-first-order kinetics. Moreover, the possible TC degradation pathways were established based on LC-MS. The enhanced photocatalytic activity was mainly attributed to the dual Z-scheme heterojunction formed by carbon-bridged g-C 3 N 4 deposition on the surface of Bi 2 O 3 and BiOI and a higher charge transfer rate of carbon-bridged g-C 3 N 4 , which effectively promoted the separation and transfer of electron-hole pairs. The trapping experiments were carried out to further explore its photocatalytic mechanism. This work provided an in-depth understanding of g-C 3 N 4 and bismuth-based catalysts.
研究领域:
材料科学
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光催化
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环境科学
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化学
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产品关联
DOI
高影响因子
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