SENSORS AND ACTUATORS B-CHEMICAL
·
2019
·
IF 6.393
Yan Chen,Yunlei Zhou,Huanshun Yin,Fei Li,Hui Li,Runze Guo,Yihao Han,Shiyun Ai
Histone acetylation is a very important post-transcriptional modification, which is catalyzed by histone acetyltransferase with acetyl group donor of acetyl coenzyme A (Ac-CoA). Abnormal histone acetylation is associated with many diseases, so it is important to develop a sensitive and efficient method for detecting histone acetyltransferase (HAT). In this paper, a simple and sensitive photoelectrochemical biosensor was established for indirect detection of HAT using the acetylation reaction by-product of coenzyme A (CoA) as target molecule. To construct the biosensor, BiOI nanoflower was employed as photoactive material, Fe 3 O 4 -NH 2 and 3-maleimidopropionic acid were used as “bridge” reagents for immobilizing CoA, and ZnO quantum dots were adopted as photocurrent inhibitor. Under optimal experimental conditions, the photocurrent decreased with changing HAT concentration from 0.01 to 500 nM. The linear relationship between the photocurrent and the logarithm value of HAT concentration can be constructed with this concentration range and the detection limit was 3 pM (S/N = 3). The sensor has excellent detection specificity, good stability and reproducibility. Based on the current situation of serious antibiotic contamination, the effect of antibiotics on HAT activity was investigated using this photoelectrochemical biosensor.
研究领域:
生物化学
·
分析化学
·
分子生物学
·
医学诊断
✓ 已验证
DOI
高影响因子
ENVIRONMENTAL RESEARCH
·
2021
·
IF 6.498
Xueqian Yan,Jin Qian,Xiangjun Pei,Lihong Zhou,Rui Ma,Mingkuan Zhang,Yufei Du,Linqin Bai
In this study, a magnetic NiFe 2 O 4 /MWCNTs/BiOI composite were fabricated and applied for enhanced and sustainable photocatalytic degradation of doxycycline (DOX) under UV light irradiation. The as-synthesized material was characterized by a series of techniques and its photocatalytic property was assessed via a couple of batch tests. With the pH at 3.0 and NiFe 2 O 4 /MWCNTs/BiOI loading of 1.5 g L −1 , the DOX degradation (at 45 mg L −1 ) efficiency could achieve 92.18% with the reaction rate constant k of 0.0072 min −1 . The high mineralization of DOX suggests the strong oxidation of both the parent pollutant and the intermediary products in the ternary catalyst system. DRS spectra indicated that compared with BiOI , the introduction of NiFe 2 O 4 and MWCNTs reduces the band gap energy of the NiFe 2 O 4 /MWCNTs/BiOI. The quenching test illustrates that h + , OH and O 2 − all functioned in the developed photocatalytic system, where O 2 − and h + play the dominant roles in DOX degradation. The more efficient electron-h + separation and more oxidizing species induced by UV light resulted in the significant improvement of DOX abatement in the developed coupling system compared with that on either BiOI or NiFe 2 O 4 /MWCNTs. The magnetic property of NiFe 2 O 4 /MWCNTs/BiOI enables its easy separation of the solid catalyst from the reaction solution and the sustainable application in the photocatalysis . Based on the intermediates of DOX decomposition identified by UPLC-MS, the possible degradation routes were proposed accordingly.
研究领域:
环境化学
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材料科学
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光催化
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水污染治理
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纳米复合材料
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药物降解
✓ 已验证
DOI
高影响因子
JOURNAL OF SOLID STATE CHEMISTRY
·
2020
·
IF 2.726
Weizhen Chen,Jiehong Huang,Xiang Yu,Xionghui Fu,Yi Zhu,Yuanming Zhang
A special rGO/BiOI/rGO sandwich structure was fabricated, which showed an excellent visible-light photoelectrocatalytic activity much higher than BiOI/rGO and BiOI. Photocatalytic activity depended on charge separation, charge injection and effective light absorption. The charge separation efficiency and the charge injection efficiency of rGO/BiOI/rGO were quantified to be much higher than that of BiOI/rGO and BiOI. So the remarkably enhanced photoelectrocatalytic performance was attributed to the significant enhancement in charge separation and charge injection resulted from more electron transfer channels due to the upper layer and underlayer rGO in the sandwich structure. However, the effective light absorption was not improved since the light absorption efficiency of rGO/BiOI/rGO was almost the same as that of BiOI and BiOI/rGO, although the incorporation of rGO broadened the light absorption range and enhanced the light absorption intensity. This work provided a deep insight for the construction of novel rGO-based photocatalysts with hierarchical nanoarchitectures exhibiting excellent photoelectrocatalytic performances.
研究领域:
材料科学
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环境科学
·
化学
✓ 已验证
产品关联
DOI
高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2016
·
IF 2.567
Fan Tian,Huiping Zhao,Zan Dai,Gang Cheng,Rong Chen
Cl-incorporated BiOI nanostructures with different Cl/I molar ratios have been successfully fabricated via a facile room-temperature method in H2O/EG mixture solvent. Combined with FT-IR, Raman spectrum, XRD Rietveld refinements, and DFT calculation, the incorporated Cl ions are found mainly occupied on I sites, resulting in a hybrid valence band consisting of I 5p, O 2p, and Cl 3p orbitals, which deepens the valence band location of the materials and induces photogenerated holes with higher oxidation power. The incorporated Cl ions into the lattice also change the evolution of photogenerated electrons and holes, inducing the broadening of the bandgap but efficient production of photogenerated carriers. The enhanced oxidation power of Cl-incorporated BiOI products was evaluated by photocatalysis degradation of methylene blue, an organic dye for which pure BiOI shows negligible direct oxidation efficiency. Ascribed to the relatively low valence band maximum (VBM) and efficient generation of photoinduced electrons and holes, the incorporated products show distinct enhancement photocatalytic activities.
研究领域:
材料科学
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环境科学
·
化学
✓ 已验证
产品关联
DOI
高影响因子
Solar RRL
·
2022
·Vol. 6
·期 12
·2200869
·
IF 9.173
Kaiyue Gao,Haibao Zhu,Chengming Zhang,Xiaojie Song,Li Lao,Liping Ni,Jianli Chen,Congliang Cheng,Xiufang Wang
The main obstacles to the photocatalytic reduction of nitrogen are the low separation efficiency of photogenerated charges and the few activation sites for nitrogen. It is highly desirable to explore new strategies for improving the nitrogen fixation performance of catalysts. Herein, the Bi metal active sites are constructed on the surface of BiOBr/BiOI heterojunction by in situ reaction, which promote the absorption, activation, and dissociation of nitrogen molecules. Moreover, the existence of Bi metal and BiOBr/BiOI heterojunction enhances the light absorption ability and facilitates the separation and transfer of photogenerated charges. The theoretical calculation also demonstrates that the BiOBr/BiOI/Bi composite has excellent electron structure and electron transfer efficiency. So, the ternary BiOBr/BiOI/Bi catalyst shows excellent performance of photocatalytic reduction of nitrogen to ammonia. The nitrogen reduction rate is 221.9 μmol g −1 h −1 , which is 7.6 and 5 times higher than that of pure BiOBr and BiOBr/BiOI. The mechanism of photocatalytic nitrogen fixation of the BiOBr/BiOI/Bi is proposed based on the experimental and theoretical results. This study provides a novel method for improving the photocatalytic nitrogen reduction performance of catalysts.
研究领域:
材料科学
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环境科学
✓ 已验证
产品关联
DOI
高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2020
·Vol. 30
·期 42
·2004108
·
IF 16.836
Jingyu Sun,Jinghong Wen,Guizhu Wu,Ze Zhang,Xue Chen,Guichang Wang,Mingyang Liu
Due to the unique surface atomic arrangement, exposed facets and defects of nanomaterials play critical roles in their physicochemical properties. Herein, BiOI nanosheets with the same type of defects on different exposed facets such as {001} (BI-001) and {110} (BI-110) are engineered to harmonize the electronic structures for antibacterial applications. Results demonstrate that BI-110 exhibits higher activity in killing Escherichia coli under 808 nm light irradiation than that of BI-001 due to its superior electronic structures. The density functional theory calculations show that BI-110 with its excellent geometric effect exhibits stronger adsorption to O 2, leading to the formation of highly concentrated single oxygen species, which causes excellent antibacterial performance. This work with the combination of facets engineering and vacancy engineering will inspire future studies on antibacterial photodynamic therapy.
研究领域:
材料科学
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生物学
·
医学
✓ 已验证
产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
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2022
·
IF 7.139
P. Velusamy,Shanhu Liu,Ruimin Xing,M. Sathiya,Awais Ahmad,Munirah D. Albaqami,Reham Ghazi Alotabi,Elangovan Elamurugu,M. Senthil Pandian,P. Ramasamy
Due to their superior optoelectronic characteristics and affordable cost, doped few-layered g-C 3 N 4 (FCN) semiconductor nanostructures are attractive for photocatalytic and photoelectrochemical (PEC) water splitting applications. Nano heterostructures composed of Praseodymium (Pr)-doped few-layered graphitic carbon nitrides (FCN) and bismuth oxy iodide (BiOI) are manufactured using thermal condensation and hydrothermal technique in two steps. The inclusion of Pr dopant not only modifies the FCN by increasing its porosity and specific surface area, but also improves electron-hole separation and charge transfer. The metal-free nano heterostructure (Pr: FCN/BiOI) that was created exhibits a strong electron-hole separation. The observed rapid charge transit in a heterojunction results in a low rate of charge recombination. Thus, the produced metal-free nano heterostructure overcomes the barrier of FCN's high photo-charge carrier recombination rate. This study investigates the influence of Pr-doping on the structural, optical, electrical conductivity , and PEC characteristics of produced heterostructures. The addition of Pr dopant to FCN increases its ability to absorb solar light. The photocurrent density of the 1.5 wt percent Pr: FCN/BiOI nano heterostructure is 16.8 times greater than that of the 1.5 wt percent Pr: FCN nanostructure. In comparison to the other Pr-doping doses, it exhibits a high hydrogen evolution reaction (HER) photocurrent density (18.21 mA/cm 2 ) and hydrogen evolution rate (3400 mol h −1 cm −2 ) under solar light irradiation (420 nm). The current work gives significant insight into the optimization of composition and structural features for FCN photoelectrocatalysis with excellent performance.
研究领域:
材料科学
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能源科学
✓ 已验证
产品关联
DOI
高影响因子
Journal of the Taiwan Institute of Chemical Engineers
·
2023
·
IF 5.7
Jiawei Jiang,Yaru Wei,Junren Chen,Jianan Dai,Jing Ma,Liangsheng Qiang,Juanqin Xue,Weiwei Liu
Background Environmental pollution demands the fabrication of suitable nano-photocatalyst that works under visible-light irradiation. The effective interfacial engineering is required for better separation of charges. Semiconductor heterostructure promotes the practical separation of electron-hole pairs and enhances the carrier separation efficiency, which has broad application prospects in photocatalytic degradation of Antibiotics. However, it remains a significant challenge to construct high-quality directly heterostructure effectively. Methods In this work, a hierarchical ternary heterojunction (Li-C 3 N 4 /ZnO/BiOI) was facilely synthesized by employing an in-situ hydrothermal strategy with different ratios using Li-C 3 N 4 as an anchor, in which the interaction at heterointerfaces was enhanced to improve the photocatalytic performance. Significant findings The photocatalytic degradation experiment was carried out with Tetracycline (TC), and the effect of the molar ratio of Li-C 3 N 4 /ZnO to BiOI on the photocatalytic degradation performance was quantitatively investigated. Benefiting from the unique electronic structure of heterostructure, the results show that a degradation rate of 92.62% was achieved for 10 mg/L TC solution within 20 min. Moreover, Li-C 3 N 4 /ZnO/BiOI-5 offered high photocatalytic activity due to the type II and Z transport, resulting in a small forbidden band gap. The charge transport pathway improves the separation of photogenerated electron-hole pairs in Li-C 3 N 4 /ZnO/BiOI. This study provides a promising avenue for rational design and application of ternary composites.
研究领域:
环境科学
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材料科学
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL RESEARCH IN CHINESE UNIVERSITIES
·
2021
·Vol. 37
·期 3
·419-427
·
IF 1.307
Guo Xiaofei,Qin Chuanxiang,Huang Sihui,Zhu Mingyue,Wang Jian-jun,Sun Jun,Dai Lixing
A composite photocatalyst, with branch-like BiOI/Bi 2 WO 6 heterojunction deposited on the polyacrylonitrile micro/nano composite fiber(PAN MNCF), was prepared via two step hydrothermal method. The products are characterized by X-ray diffraction(XRD), X-ray photoelectron spectroscopy(XPS), photoluminescence(PL) spectra, UV-Vis diffuse reflection spectroscopy(UV-Vis DRS) and time-resolved fluorescence spectra. The PAN/BiOI/Bi 2 WO 6 micro/nano composite fiber(PAN/BiOI/Bi 2 WO 6 MNCF) showed better visible-light photocatalytic performance than PAN MNCF or BiOI/Bi 2 WO 6 powder, probably ascribed to the collective effect between PAN MNCF and BiOI/Bi 2 WO 6 heterojunction. Significantly, the PAN/BiOI/Bi 2 WO6 MNCF could be easily recycled through filtration method, thus avoiding the secondary pollution.
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
MICROCHIMICA ACTA
·
2021
·Vol. 188
·期 2
·1-10
·
IF 5.833
Pei Yujiao,Ge Yonghao,Zhang Xiaoru,Li Ying
A cathodic photoelectrochemical sensor has been developed for the determination of exosomes, based on a dual-signal reduction strategy. A heterostructure of NiO/BiOI/Au NP/CdSe was synthesized as a photoelectrochemical sensing interface, which is able to suppress the recombination of electron-hole pairs and produce a higher photocurrent. The obtained materials were characterized, and the mechanism for the generation of the cathodic photocurrent was proposed. CdSe QDs (quantum dots) modified with DNA 2 were assembled on the electrode through the hybridization with EpCAM aptamer on the surface of ITO/NiO/BiOI/Au NP. The introduction of CdSe QDs to the electrode increases the photocurrent.The recognition of exosomes with aptamer DNA led to the separation of CdSe QDs from the electrode, which in turn caused the decrease of photocurrents. Meanwhile, the big volume of exosomes hinders the electron transfer between the electrode and electrolyte. Due to the dual reduction effect, a sensitive PEC sensor was obtained with a detection limit of 1.2 × 10 2 particles/μL exosomes ( λ ex = 430 nm, bias voltage = − 0.1 V). The cathodic photoelectrochemical sensor showed good selectivity, performed well in a complex biological environment and could be used to distinguishbreast cancer patients from healthy individuals. Graphical abstract
研究领域:
分析化学
·
生物传感器
·
纳米技术
·
生物医学工程
·
癌症研究
✓ 已验证
DOI
PubMed
高影响因子
TALANTA
·
2026
·
IF 6.7
Ziyi Chen,Yaqian Feng,Shu Chen,Wenfu Liu,Peisheng Zhang,Rongjin Zeng,Yuanqiang Hao
This study presents a polarity-switchable photoelectrochemical (PEC) method for determining hydrogen sulfide (H 2 S) in fruit matrices by electrochemically programming BiOI into a BiOI/Bi 2 S 3 heterojunction on FTO. BiOI nanosheets were first deposited potentiostatically and then partially sulfidized in Na 2 S under a mild cathodic bias, forming a tightly coupled BiOI/Bi 2 S 3 heterostructure with an in-situ generated surface Bi 2 S 3 layer. The heterojunction broadens visible-light absorption and strengthens interfacial charge separation, leading to a cathodic-to-anodic photocurrent inversion that greatly improves signal discrimination at 0 V bias. Under optimized conditions, the device shows a linear range of 0.05–30 μM with a 5.42 nM LOD, high selectivity, and stable on/off cycling. Applied to real samples, H 2 S levels of 2.13, 1.54, and 1.32 μM were obtained for apple, pear, and kiwifruit, with 93.8%‒107.4% recoveries by standard additions. This simple, low-bias PEC platform couples in-situ structural conversion with polarity switching for rapid quality monitoring and early spoilage assessment.
✓ 已验证
DOI
PubMed
高影响因子
ACS Applied Materials & Interfaces
·
2025
·
IF 8.2
Yuqing He,Yuqing Liu,Jianding Zhang,Dong Zheng,Xuzhuo Fan,Gang Zhang,Di Wang,Wenping Wang,Shikui Han
Photoelectrochemical (PEC) water splitting offers an ideal strategy for the development of clean and renewable energy. However, its practical implementation is often inhibited by the high recombination rate of photogenerated charge carriers and the instability of photoanodes. Introducing defect engineering (such as oxygen vacancies) and constructing internal electric field-modulated Z-scheme heteronanostructures (HNs) can be considered as effective approaches to overcome these obstacles. Herein, a flexible method is developed for synthesizing Z-scheme BiOI-CdS HNs with oxygen vacancies, which induce an internal electric field between ultrathin BiOI nanosheets and a CdS semiconductor. This Z-scheme mechanism significantly promotes the separation of photogenerated electron–hole pairs, thereby enhancing the PEC performance. The BiOI-CdS photoanode achieves a photocurrent density of 4.22 mA cm–2 at 1.6 V vs RHE under AM 1.5G illumination (100 mW cm–2), outperforming bare BiOI and CdS. Moreover, the photoanode exhibits exceptional stability with only a slight decrease of approximately in its initial photocurrent after a rigorous 4 h test, surpassing other counterparts in terms of durability. This work affords a better understanding of oxygen vacancies and the construction of highly efficient and stable Z-scheme photoanodes for feasible PEC application.
研究领域:
材料科学
·
能源科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）