SENSORS AND ACTUATORS B-CHEMICAL
·
2018
·
IF 5.667
Na Xiao,Shi Gang Liu,Shi Mo,Yu Zhu Yang,Lei Han,Yan Jun Ju,Nian Bing Li,Hong Qun Luo
In this work, a two-dimensional optical sensing platform for H 2 O 2 , glucose, and uric acid (UA) detection is developed, which integrates the advantages of colorimetric and ratiometric fluorescent techniques. ZnFe 2 O 4 magnetic microspheres with an intrinsic peroxidase-like activity are synthesized to catalyze the oxidation of o-phenylenediamine in the presence of H 2 O 2 , producing a typical yellow substance (oxOPD) with an absorption peak at 420 nm. The oxOPD can significantly quench the fluorescence of boron and nitrogen co-doped CDs (B,N-CDs) at 430 nm through the inner filter effect and generate a new fluorescence emission peak at 556 nm. Thus, the fluorescence intensity ratio ( I 556 / I 430 ) can be utilized for quantitative analysis of the concentrations of H 2 O 2 and H 2 O 2 -involved metabolites (glucose and UA). The colorimetric “naked-eye” readout based on the color change of solution can also be established to determine H 2 O 2, glucose, and UA levels. The detection limit based on colorimetric sensing for H 2 O 2, glucose, and UA are 0.09, 0.9, and 0.9 μM, respectively, and 0.1, 8, and 1 μM using ratiometric fluorescent sensing. Furthermore, this strategy can detect glucose and UA in human serum with satisfactory results, and provide potential applications in the detection of metabolites related to H 2 O 2 release.
研究领域:
分析化学
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生物医学工程
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生物传感
✓ 已验证
DOI
高影响因子
JOURNAL OF RARE EARTHS
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2020
·
IF 3.104
Hongyu Liu,Jiabei Li,Pengfei Hu,Songqiang Sun,Liyi Shi,Lining Sun
Manganese-zinc ferrite is a kind of very important magnetic ferrite material. The properties of wide absorption band, sensitivity to ultraviolet (UV) light and tumor H 2 O 2 promise it to be possibly used as a photothermal therapy (PTT), photodynamic therapy (PDT) and chemodynamic therapy (CDT) agent. Based on the unique advantages of rare-earth doped nanoparticles , an Er 3+ , Tm 3+ co-doped upconversion-mediated nanosystem with manganese-zinc ferrite shell (named as UCNPS@M) was developed through a facile thermal co-decomposition method. The final nanosystems were surface-modified by using dopamine hydrochloride (DA) in order to warrant good biocompatibility (named as UCNPS@M@DA). Under irradiation of near-infrared (NIR) light, UCNPS emit both ultraviolet and visible light. The UV light is mostly absorbed by manganese-zinc ferrite shell to produce reactive oxygen species (ROS), which is essential to the potential PDT and CDT effect of nanosystems, and at the same time, Mn 0.5 Zn 0.5 Fe 2 O 4 can further react with H 2 O 2 to promote the efficiency of •OH-generation. It is expected that UCNPS@M@DA can act as upconversion luminescence imaging guidance due to the visible emission from UCNPS. In addition, the energy absorbed by the nanosystems can be transferred to heat to realize photothermal effect. Moreover, UCNPS@M@DA was successfully applied as a T 1 / T 2 -weighted magnetic resonance imaging (MRI) contrast agent due to the existence of Gd, Mn, and Fe elements. In light of the upconversion luminescence (UCL) imaging from the UCNPS as well as potential PTT, PDT, CDT effect mentioned above, this work provides a possibility to realize cancer multi-model bioimaging guided treatment by using an all-in-one diagnosis and therapy nanosystem through a simple yet powerful strategy.
研究领域:
材料科学
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生物医学工程
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纳米医学
✓ 已验证
产品关联
DOI
高影响因子
Journal of Environmental Chemical Engineering
·
2025
·
IF 7.2
Yuqiu Fan,Dawei Liu,Haipeng Wan,Xingyu Liu,Jun Wang,Kun Xiong
For rapid and efficient removal of tetracycline (TC), a new cobalt (Co) and manganese (Mn) co-doped zinc ferrite (CoMnZFO) photoanode was synthesized in this study. Compared to the pure zinc ferrite (ZFO), CoMnZFO exhibited stronger enhanced light harvesting ability and a narrower band gap. Although there were oxygen vacancies in both CoMnZFO and ZFO lattices, CoMnZFO possessed more double-exchange interaction pathways in comparison with ZFO. Besides the Fe 2 + /Fe 3+ pathway, CoMnZFO also had the Mn 3+ /Mn 4+ pathway, which facilitates the transfer of photogenerated electrons ( e - ) and holes (h + ), thereafter enabling CoMnZFO better photoelectrocatalytic (PEC) activity. Since CoMnZFO had a significantly smaller Helmholtz layer resistance than ZFO, it enhanced TC adsorption onto its surface. Exposed to simulated solar light for 12 min, CoMnZFO was able to make the complete degradation of TC (20 mg/L, 70 mL) when a voltage of 0.2 V was applied, while ZFO only achieved a TC degradation rate of 50.85 ± 5.77 % under the same condition. In addition, CoMnZFO achieved a TC mineralization rate of 41.89 ± 1.72 %, while that of ZFO was 13.87 ± 1.94 %. Furthermore, a quantitative structure-activity relationship (QSAR) method was applied to evaluate the ecotoxicological impact of the degradation products. The results demonstrate that the toxicity and mutagenicity of TC were weakened after experiencing the PEC treatment of CoMnZFO. Overall, this work offers a rapid and efficient way for PEC removal of TC-contaminated wastewater.
研究领域:
环境科学
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材料科学
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污染治理
✓ 已验证
产品关联
DOI
高影响因子
Nature Communications
·
2023
·Vol. 14
·期 1
·1-12
·
IF 16.6
Li Bowei,Qi Ji,Liu Feng,Zhao Rongfang,Arabi Maryam,Ostovan Abbas,Song Jinming,Wang Xiaoyan,Zhang Zhiyang,Chen Lingxin
Fluorescence analysis is a fast and sensitive method, and has great potential application in trace detection of environmental toxins. However, many important environmental toxins are non-fluorescent substances, and it is still a challenge to construct a fluorescence detection method for non-fluorescent substances. Here, by means of charge transfer effect and smart molecular imprinting technology, we report a sensitive indirect fluorescent sensing mechanism (IFSM) and microcystin (MC-RR) is selected as a model target. A molecular imprinted thin film is immobilized on the surface of zinc ferrite nanoparticles (ZnFe 2 O 4 NPs) by using arginine, a dummy fragment of MC-RR. By implementation of IFSM on the paper-based microfluidic chip, a versatile platform for the quantitative assay of MC-RR is developed at trace level (the limit of detection of 0.43 μg/L and time of 20 min) in real water samples without any pretreatment. Importantly, the proposed IFSM can be easily modified and extended for the wide variety of species which lack direct interaction with the fluorescent substrate. This work offers the potential possibility to meet the requirements for the on-site analysis and may explore potential applications of molecularly imprinted fluorescent sensors.
研究领域:
环境科学
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分析化学
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纳米技术
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毒理学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Molecular Catalysis
·
2025
·
IF 4.9
Ji Zhao,Lu Cai,Jia-Li Zhang,Zhi-Yao Feng,Shao-Ming Yang,Yong-Xin Liu,Xi Chen
Extensive use and environmental persistence of tetracycline hydrochloride (TC•HCl) pose significant threats to both ecological environment and human health. It is crucial to explore the efficient degradation method to realize sustainable development. This work proposes a photothermal catalysis (PTC) strategy for the degradation TC•HCl to improve its degradation efficiency than photocatalysis (PC) and thermal catalysis (TC). Porous nanorod-shaped zinc ferrite (ZF) with ferrimagnetic behavior was prepared via a hydrothermal-calcination method. ZF calcined at 400 °C (ZF-400) possesses a typical mesoporous structure with a specific surface area (SSA) of 35.68 m 2 ⋅g −1 , which is 1.97 and 5.03 times higher than those of ZF calcined at 500 °C (ZF-500) and 600 °C (ZF-600), respectively, exhibiting the strong physical adsorption capacity for TC•HCl. Abundant Lewis acid sites on the ZF-400 are beneficial to the chemisorption of TC•HCl. The excellent adsorption capacity of ZF-400 for TC•HCl follows the pseudo-second-order kinetic model with the adsorption rate constant of 61.2 × 10 −3 g⋅mg −1 ⋅min −1 . The PTC degradation of TC•HCl over ZF-400 reaches 93.4 % within 120 min and follows the pseudo-first-order kinetic model with the degradation rate constant of 9.5 × 10 −3 min −1 , being 2.88 times and 1.98 times higher than those of PC and TC, severally. Radical quenching experiments confirm that •O 2− , h + , and •OH serve as the dominant active species in the PTC degradation of TC•HCl over ZF-400. Besides, the PTC degradation of TC•HCl remains above 83 % with no significant decrease in catalyst activity after six cycles.
研究领域:
环境科学
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材料科学
·
催化
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纳米技术
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化学工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2019
·Vol. 137
·期 17
·48609
·
IF 2.188
Qiaoran Zhang,Mengmeng Zhang,Huili Shi,Zhiwei Li,Laigui Yu,Xiaohong Li,Zhijun Zhang,Zhishen Wu
Boron nitride nanosheets (BNNSs) were combined with ammonium polyphosphate (APP) and zinc ferrite (ZF) nanoparticle to prepare APP/BNNS/ZF composite aerogels via a freeze-drying method. Then, epoxy resin (EP) was incorporated into the pores of the as-obtained aerogels via a vacuum-assisted infiltration method to afford APP/BNNS/ZF-EP composites with greatly improved fire resistance. The flame-retardant performance of the as-prepared composites was evaluated by cone calorimetry test; and the flame-retardant mechanism of the aerogels was discussed in relation to thermogravimetric-infrared analysis of the pyrolysis products. Findings demonstrate that the APP/BNNS/ZF-EP composite containing 24.0 wt % of the APP/BNNS/ZF aerogel exhibits superior flame-retardant performance; and its peak heat release rate and total heat release are reduced by 86.2 and 86.5% as compared with those of pristine EP. The reason lies in that APP can be decomposed in the early stage of burning to generate phosphoric acid, thereby promoting the formation of char layer; ZF can catalyze the charring process; and BNNS can act as the physical barrier to retard the burning of EP. In addition, the APP10/BNNS1/ZF0.1-EP composite can be endowed with superhydrophobicity via the modification of polydimethylsiloxane and hydrophobic nanosilica, which could contribute to broadening its scope of application. © 2019 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2020 , 137 , 48609. Highlights 1 Flame-retardant APP/BNNS/ZF aerogels were prepared by a freeze-drying method. 2 APP/BNNS/ZF-EP composites were obtained via a vacuum-assisted infiltration method. 3 The pHRR of composites are reduced by 86.2% as compared with that of pristine EP. 4 The EP composites exhibit excellent flame retardancy and superhydrophobicity.
研究领域:
材料科学
·
化学工程
·
高分子科学
·
消防安全
✓ 已验证
产品关联
DOI
高影响因子
ENVIRONMENTAL RESEARCH
·
2025
·
IF 7.7
Yuantian Zhao,Zhiwei Zhou,Haikuan Yu,Xing Li,Jiawei Ren,Junyan Chen,Fei Qi
Developing carbonaceous composites with strong non-radical activity and recyclability is key for sustainable wastewater purification. Herein, a novel photocatalytic process was designed using zinc ferrite loaded on oxalic acid-modified powdered activated carbon (ZFO/OA/PAC) to activate persulfate (PDS) under visible light (VL) irradiation. ZFO was in-situ grown onto OA/PAC via C=O bridging, forming stable Zn/Fe–O–C bonds that suppressed magnetic agglomeration and enabled directional electron transfer. The optimized interfacial binding energy of 22.45 kcal/mol reduced the activation energy barrier, enhancing active site utilization and reaction kinetics through efficient electron cycling. With a narrow bandgap of 1.54 eV, 0.1 g/L ZFO/OA/PAC and 0.1 g/L PDS achieved 94.3% tetracycline (TC) removal under VL, with a kinetic constant 23.75 times higher than pristine ZFO. The process predominantly generated h + and 1 O 2 , the latter arising from superoxide conversion, PDS-induced functional group transformation, and oxygen-vacancy-mediated electron transfer. Photocatalysis also promoted Fe(III)/Fe(II) cycling, further aiding reactive oxygen species (ROS) formation. Seventeen intermediates were identified, with degradation and detoxification proceeding mainly through ring-opening, substitution, and ROS-driven molecular reconstruction. The magnetic ZFO/OA/PAC exhibits broad organic pollutants’ removal capability and effective adaptability to real water matrices. This work provides a paradigm for designing magnetic carbonaceous photocatalysts to leverage non-radical pathways, advancing scalable wastewater purification technologies.
研究领域:
环境科学
·
材料科学
·
化学工程
·
光催化
·
水处理技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2020
·
IF 3.99
Qiaoxia Zhang,Weikang Li,Fengyang Zhao,Chang Xu,Gaochao Fan,Qingyun Liu,Xianxi Zhang,Xiao Zhang
An ultrasensitive enzyme-free electrochemical sandwich-type thrombin aptasensor is proposed in this work, with the amplifier of Pt loaded hollow zinc ferrite nanospheres . Silver nanowires& particles (AgNWs&PCs) are used as the substrate materials to decorate the working electrode . Silver particles (AgPCs) are introduced for welding of AgNWs to further improve the electrical performance of the working electrode. The conductive electrode decorated with AgNWs&PCs can provide a substrate for the immobilization of thrombin aptamer 1 (Apt1). Moreover, AgNWs&PCs possess the catalytic activity for H 2 O 2 reduction, contributing to the signal amplification. The prepared Pt loaded hollow zinc ferrite nanospheres with an excellent electrocatalytic activity for H 2 O 2 reduction can also be used to immobilize aptamer 2 (Apt2). Under the optimized condition, the performance of the biosensor is evaluated by amperometry . The proposed thrombin aptasensor has a wide linear detection range from 0.05 pM to 35 nM and a low detection limit of 0.016 pM (S/N = 3), due to the synergistic effect of AgNWs&PCs electrode and the Pt loaded hollow zinc ferrite nanospheres amplifier. This aptasensor displays high sensitivity, good reproducibility and stability, providing a promising platform for the analysis of thrombin.
研究领域:
分析化学
·
生物传感器
·
纳米技术
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）