Analytical Methods
·
2016
·Vol. 8
·期 20
·4056-4063
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IF 1.915
Shifeng Li,Li Zhang,Lei Chen,Yiman Zhong,Yonghong Ni
ZnSe quantum dots (QDs) with a homogeneous size distribution and good stability were synthesized by the reaction of zinc acetate and NaHSe in the presence of glutathione (GSH). The obtained ZnSe QDs were characterized using transmission electron microscopy (TEM) and X-ray powder diffraction (XRD). Simultaneously, UV-visible spectroscopy (UV-vis) was performed and the fluorescence properties of ZnSe QDs were investigated. The effect of ZnSe QDs on the luminol–potassium periodate (KIO4) chemiluminescence (CL) system, a popular model CL system, was researched. It was found that as-prepared ZnSe QDs could strongly enhance the chemiluminescence (CL) of the luminol–KIO4 system. To discuss the mechanism of the CL enhancement, we studied the UV-vis and CL spectra of the luminol–KIO4–ZnSe QDs system. The CL enhancement should be attributed to the oxidation of luminol to its excited state by KIO4, under the catalysis of ZnSe QDs, which caused strong light emission. It was found that rutin, p-t-butylprocatechol, catechol, paracetamol, resorcinol and tryptophan could markedly inhibit the CL of the luminol–KIO4–ZnSe QDs system among 17 kinds of amino acids and 23 other kinds of organics. The above phenomena presented good linear relations. Thus, effective methods to detect them were developed.
研究领域:
分析化学
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生物医学工程
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DOI
高影响因子
International Journal of Environmental Research and Public Health
·
2022
·Vol. 19
·期 22
·14726
·
IF 4.614
Hong Xiao,Qing Liu,Yingjun Wang,Ying Zhu,Dexin Fang,Ganxue Wu,Zhenxing Zeng,Hong Peng
Fe(II)-activated potassium periodate (KIO4) oxidation was used to improve the dewaterability of waste-activated sludge for the first time. Compared with those of raw sludge, the capillary suction time (CST), specific resistance filtration (SRF), and water content of filter cake (WC) of sludge treated using the Fe(II)/KIO4process under the optimal conditions (i.e., the initial pH = 6.8, KIO4dose = 1.4 mmol/g volatile suspended solids, Fe(II)/KIO4molar ratio = 1.2) decreased by 64.34%, 84.13%, and 6.69%, respectively. For conditioned sludge flocs, the Zeta potential and particle size were increased, and hydrophilic proteins in extracellular polymeric substances (EPS) were partly degraded, accompanied by the transformation of tightly bound EPS into soluble EPS and the conversion of dense sludge flocs into loose and porous ones. During Fe(II)/KIO4oxidation, Fe(IV) and the accompanying•OH were determined as the predominant reactive species and the underlying mechanism of sludge EPS degradation was proposed. This work provides a prospective method for conditioning the sludge dewaterability.Keywords:sludge dewaterability;ferrous ion;potassium periodate;extracellular polymeric substances
研究领域:
环境工程
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废水处理
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DOI
PubMed
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2021
·
IF 7.46
Ming Li,Caiping Ding,Pengde Jia,Longhua Guo,Sui Wang,Zhiyong Guo,Fengmei Su,Youju Huang
p -Aminophenol (p-AP) is one of the common environmental pollutants with teratogenic effects, nephrotoxicity and genotoxicity. In this study, a novel colorimetric method for quickly, sensitive and on-site detection of p-AP was developed based on target induced etching of AuNRs, which will generate colorful color changes. Our investigation reveals that potassium iodate (KIO 3 ) can be reduced by p-AP to generate iodine (I 2 ), and I 2 can etch CTAB stabilized AuNRs along the longitudinal direction. As an emerging fascinating colorimetric material, LSPR extinction peak of AuNRs will shift to short wave direction with a color change from the initial tea red to brown, gray, dark green, cyan, blue, indigo, purple, purplish red and final pink. Under the optimal conditions, our strategy is analytically specific and sensitive for the detection of p-AP from 0.5 μM to 20 μM by the naked eye, and a detection limit of 0.27 μM was achieved. Meanwhile, this colorimetric method is used to detect p-AP in environmental water, paracetamol tablets and human urine. Hence, this proposed strategy has the advantages of rapid semi-quantitative analysis of p-AP with naked eyes, simple operation and good application prospect.
研究领域:
环境科学
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分析化学
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生物医学工程
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DOI
高影响因子
LUMINESCENCE
·
2019
·Vol. 34
·期 7
·673-679
·
IF 1.691
Min Zhou,Qiqi Chen,Ailian Wang,Juanhua Li,Yongjun Ma
The chemiluminescence (CL) behaviour of the luminol–potassium periodate system enhanced by CdTe quantum dots capped with thioglycolic acid (TGA–CdTe QDs) was studied using kinetic experiments, CL spectra, UV–vis absorption spectra and fluorescence spectra. The production of oxygen-containing reactant intermediates (O 2 •− and OH • ) in the present CL system was verified by CL. The possible CL mechanism was discussed in detail. Furthermore, theophylline (THP) was determined based on its enhancement of the CL intensity of the CdTe QDs–luminol–potassium periodate system coupled with a flow-injection technique. Under these optimized conditions, the linear range was found to be from 1.0 × 10 −8 to 1.0 × 10 −5 g/mL with a detection limit of 2.8 × 10 −9 g/mL (3σ). The recoveries for the determination of THP in tablets were from 98.2 to 99.6%.
研究领域:
分析化学
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药学
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DOI
PubMed
高影响因子
CANCER INVESTIGATION
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2017
·
IF 2.007
Yan Liu,Hong Li,Jiayue Zhang,Xu Gao
The effects of different doses of potassium iodate (KIO3) on the malignancy of thyroid cancer were investigated. Results showed that the proliferation, migration, and invasion of SW579 thyroid cancer cells were improved by 10−6 M KIO3, which was associated with microRNA(miR)-146a deficit; 10−2 M KIO3 significantly enhanced miR-146a level and suppressed SW579 cell proliferation, migration, and invasion. The diverse effects of KIO3 on SW579 cells were associated with the expression changes in miR-146a targets, Bcl-2, Bax, and caspase-3. Our study concludes that different doses of KIO3 have counteracting effects on the malignancy of thyroid cancer through modulating miR-146a level.
研究领域:
肿瘤学
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分子生物学
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细胞生物学
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DOI
PubMed
高影响因子
ANALYTICA CHIMICA ACTA
·
2023
·
IF 6.2
Minjie Peng,Yufeng Sun,Wen Zang,Changyong Gao,Lijing Miao,Aiguo Wu,Yujie Zhang
Background As a common industrial raw material and chemical intermediate, p-Aminophenol (pAP) is recognized as a serious pollutant that poses harm to both the environment and human health. The traditional detection methods for pAP have the advantages of good selectivity and high sensitivity, but their complex operation and time-consuming defects limit their application in on-site detection. Therefore, it is necessary to develop a simple, low-cost, rapid and high-sensitivity method for the detection of pAP. Results Noble metal nanoparticles have been widely used in colorimetric sensing because of their simplicity and practicality. Herein, we presented a simple, excellent sensitive and selective colorimetric method for high-performance detection of pAP based on Cu–Au nanoparticles (Cu–Au NPs) and KIO 3 . In the presence of pAP, KIO 3 was reduced to I 2 , which subsequently chemically adsorbed onto Cu–Au NPs surface and induced the dispersion and reorganization of Cu–Au NPs, along with prominent color change of the dispersion from gray-blue to pink and the transformation of Cu–Au NPs from chain-like aggregates to individual dispersed, irregular, subspherical nanoparticles. The mechanism was verified by TEM , DLS , Zeta potential , UV–vis and XPS . Meanwhile, Cu–Au NPs probe can rapidly detect pAP within 25 min, the limit of detection of pAP probe is 5 μM by the naked eyes and 0.03 μM by UV–vis absorption spectrum . Significance and novelty This is the first colorimetric assay for pAP based on Cu–Au NPs probe. The satisfactory linearity (R 2 = 0.9984) indicates that the colorimetric probe based on Cu–Au NPs and KIO 3 can be utilized for quantitative detection of pAP. The detection results of pAP in real environmental water samples, urine samples and paracetamol tables demonstrate the practicability of pAP colorimetric probe.
研究领域:
分析化学
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环境科学
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纳米技术
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毒理学
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DOI
PubMed
高影响因子
LUMINESCENCE
·
2010
·Vol. 26
·期 6
·397-402
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IF 1.209
Ying Liu,Zhifeng Fu,Lin Wang
A rapid and simple capillary electrophoresis method coupled with chemiluminescent (CL) detection was proposed for analysis of isoniazid (ISO) based on the enhancement effect of ISO to CL emission of luminol-periodate potassium reaction. Under the optimal conditions, ISO can be assayed in the range of 7.0 × 10 −7 to 3.0 × 10 −5 g mL −1 ( R 2 = 0.9990) with a limit of detection of 3.0 × 10 −7 g mL −1 (signal-to-noise ratio of 3). The whole analysis process can be completed within 2.5 min with a theoretical plate number of 6258. The relative standard deviations of the signal intensity and the migration time were 3.1 and 1.4% for a standard sample at 1.0 × 10 −5 g mL −1 ( n = 5), respectively. The presented novel strategy was successfully applied to the determination of ISO in commercial pharmaceutical preparations and spiked human serum samples. Copyright © 2010 John Wiley & Sons, Ltd.
研究领域:
分析化学
·
药物分析
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DOI
PubMed
高影响因子
COMBUSTION EXPLOSION AND SHOCK WAVES
·
2023
·Vol. 59
·期 3
·367-374
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IF 1.2
Wang D.-W.,Li C.,Zhang L.,Zhu C.-G.
Abstract To develop a green primary explosive, we prepare an Al@KIO 4 nano-thermite using spray co-precipitation and then mix it with pentaerythritol tetranitrate (PETN) to form a PETN/Al@KIO 4 composite as a primary explosive. The thermite structure is characterized using X-ray diffraction, scanning electron microscopy, and high-resolution transmission electron microscopy, which indicates that the thermite is about 200 nm and well distributed. The combustion performance is investigated using high-speed photography and confined combustion experiments. The results show that the detonation time of PETN/Al@KIO 4 composites is 60 \(\mu\) s earlier than that of pure PETN, indicating that the thermite accelerates the process of the deflagration-to-detonation transition of PETN. The detonation performance of the composites is investigated, and it is verified that PETN/Al@KIO 4 can initiate RDX successfully and be used as a primary explosive. Moreover, the safety performance and long-term storage performance of the composite are evaluated, which shows that the PETN/Al@KIO 4 composite performance is steady and the initiation effect does not change after 20 years of storage.
研究领域:
材料科学
·
爆炸化学
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DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Lei Gao,Kang Niu,Xiyue Zhang,Xiaohong Yan,Songchao Shi,Shangbiao Feng,Chongwei An,Haifeng Yang,Zhiqiang Qiao,Chuanhao Xu
Metastable intermolecular composites (MICs) have demonstrated significant potential in microscale applications because of their favorable chemical reaction properties. However, the variability in reaction rates associated with conventional powder states, along with a limited understanding of reaction behaviors within semiconfined environments, has constricted the functional application of MICs to some extent. This study integrates and constructs a semiconfined energetic assembly embedded with MICs energetic sticks via additive manufacturing technology. Building upon this foundation, the energy release behavior of the assembly, characterized by varying energy release systems and component ratios, aims to elucidate the microscale reaction behavior of MICs within a semiconfined environment by investigating the energy release mechanisms of the energetic assembly. These findings indicate that MICs-based energetic assembly can inflict irreversible damage to silicon chips due to the pressure accumulation of gas-phase products during combustion. Notably, the Al/KIO 4 -based energetic assembly, which exhibits high reaction kinetics and efficient pressure release characteristics, can completely destroy a silicon chip with a thickness of 725 μm within 6 ms. Furthermore, it demonstrates the shortest response time (64 ms), the most effective damage impact, and favorable environmental adaptability in a slightly fuel-rich state (Φ = 1.5). This research not only enhances the understanding of the microscale energy release effects of MICs materials but also provides a novel perspective for their functional applications.
研究领域:
材料科学
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爆炸与安全工程
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化学工程
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DOI
高影响因子
ANALYTICAL CHEMISTRY
·
2024
·
IF 6.7
Xiaoxuan Ren,Zhijian Tian,Xuwen Gao,Yaojia Ai,Mengwei Li,Bin Zhang,Guizheng Zou
Chemiluminescence (CL), especially commercialized CL immunoassay (CLIA), is normally performed within the eye-visible region of the spectrum by exploiting the electronic-transition-related emission of the molecule luminophore. Herein, dual-stabilizers-capped CdTe nanocrystals (NCs) is employed as a model of nanoparticulated luminophore to finely tune the CL color with superior color purity. Initialized by oxidizing the CdTe NCs with potassium periodate (KIO4), intermediates of the reactive oxygen species (ROS) tend to charge CdTe NCs in both series-connection and parallel-connection routes and dominate the charge-transfer CL of CdTe NCs. The CdTe NCs/KIO4 system can exhibit color-tunable CL with the maximum emission wavelength shifted from 694 nm to 801 nm, and the red-shift span is over 100 nm. Both PL and CL of each of the CdTe NCs are bandgap-engineered; the change in the NCs surface state via CL reaction enables CL of each of the CdTe NCs to be red-shifted for ∼20 nm to PL, while the change in the NCs surface state via labeling CdTe NCs to secondary-antibody (Ab2) enables CL of the CdTe NCs-Ab2 conjugates to be red-shifted for another ∼20 nm to bare CdTe NCs. The CL of CdTe753-Ab2/KIO4 is ∼791 nm, which can perform near-infrared CL immunoassay and semi-automatically determined procalcitonin (PCT) on commercialized in vitro diagnosis (IVD) instruments.
研究领域:
纳米技术
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分析化学
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生物医学工程
·
临床诊断
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产品关联
DOI
PubMed
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
·
2025
·
IF 11.3
Shuang Su,Zhiyang Zhang,Jiadong Chen,Yan Chen,Xin Cao,Shuoyang Yan,Ranran Yu,Jie Shao,Xiaokun Wang,Jaebum Choo,Lingxin Chen
On-site detection of hydrogen sulfide (H 2 S), a toxic byproduct of microbial decomposition, is essential for environmental surveys, sewage tracing, and occupational safety. While existing gold nanorods (Au NRs)-based colorimetric methods offer portability and sensitivity, their practicality is hindered by the instability of enzymes and colloidal nanoparticles. Herein, we present an enzyme-free, portable H 2 S detection device using Au NRs powder, ensuring highly sensitive and reliable colorimetric detection while enhancing long-term applicability. The sensing strategy involves two steps: H 2 S microextraction and colorimetric assay. First, H 2 S is accumulated into a NaOH aqueous drop from a complex sample matrix via headspace single-drop microextraction (HS-SDME) using sulfamic acid. In the colorimetric assay, dissolved H 2 S reduces KIO 3 to I 2 in glycine-HCl buffer (pH 2.6), which etches Au NRs in the presence of Br - and CTA + , causing a blue shift in the plasmon band with a distinct color change. This method achieves a visual detection limit of 0.05 µM, approximately 10 times lower than the Methylene Blue method. The use of HS-SDME ensures excellent selectivity against co-existing ions (≥10-fold) and small organic molecules (100-fold). Validation with real samples yielded recoveries of 92.40 %-109.51 %, demonstrating reliability in environmental monitoring and river pollution tracing. To simplify detection, we developed a liquid-free test kit containing an H 2 S microextraction tube (sulfamic acid powder), a colorimetric assay tube (Au NRs powder and solid buffer), and a portable heating device. This enzyme-free sensor ensures long-term stability and practicality, advancing Au NRs-based sensors for environmental monitoring.
研究领域:
环境科学
·
分析化学
·
纳米技术
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传感技术
·
水污染监测
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产品关联
DOI
PubMed
高影响因子
INORGANIC CHEMISTRY
·
2024
·
IF 4.3
Xudong Wu,Kaifu Yu,Yizhou He,Xin Cao,Tao Chen,Wenkun Zhu
The phenomenon of rapid migration of photogenerated charges in natural photosynthetic systems has motivated the design of efficient photocatalysts capable of fast charge separation and efficient reaction kinetics for photocatalytically assisted enrichment and separation of uranium U(VI) in uranium wastewater. In this study, we developed a biomimetic photocatalytic system MnOx/NH2-UiO-66-rGO (M/UiO-rGO) with spatially separated dual cocatalysts. Among them, rGO functions to capture electrons and participates in reduction reactions, while MnOx captures holes and participates in oxidation reactions. The M/UiO-rGO catalyst exhibits excellent performance in photocatalytic reduction of uranium (reaching 91.8% in 1 h), and even under natural light conditions, it exhibits excellent uranium removal ability (80.4%). Using multispectral coupling technology, we further confirmed that enriched uranium undergoes a continuous and complex reaction process of “capture-reduction-free radical oxidation–nucleation–crystallization”. This work presents a viable strategy for designing biomimetic photocatalysts with efficient charge separation and rapid reaction kinetics for environmental purification purposes.
研究领域:
环境科学
·
材料科学
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DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）