International Journal of Electrochemical Science
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2023
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IF 1.5
Hao Cui,Qingde Li
Paint has a variety of excellent properties containing anti-corrosion, waterproof, oil-proof, chemicalresistant, light-resistant, temperature-resistant. The wooden furniture covered with paint is commonly used to ensure their excellent quality. However, the soluble heavy metals in the paint exist on the surface of wooden furniture, endangering human health when they are enriched in human bodies. Therefore, an effective detection method is needed to analyze the contents of heavy metals in wooden furniture. Here, we designed and manufactured a disposable screen-printed electrode (SPE) for the Cd(II) and Pb(II) determination through square wave anodic stripping voltammetry, which used a special printed ink mixed multi-walled carbon nanotube and coated with bismuth oxide nanoparticle (BONP-MSPE). The characteristics of BONP-MSPE were studied using cyclic voltammetry, electrochemical impedance spectroscopy and square-wave stripping voltammetry, and then the detecting conditions were optimized. Under the optimal conditions, the values of peak currents of Cd(II) and Pb(II) increased linearly with the concentrations of Cd(II) and Pb(II). The linear ranges were from 0.5 to 40 μg/L for Cd(II) and 0.5 to 40 μg/L for Pb(II), with detection limits of 0.5 μg/L and 0.05 μg/L (S/N = 3), respectively, Lastly, the BONP-MSPE was further employed to measure the contents of Cd(II) and Pb(II) in pint samples analysis.
研究领域:
分析化学
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环境科学
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DOI
高影响因子
Journal of Environmental Chemical Engineering
·
2023
·
IF 7.7
Jiajia Li,Yi Li,Manhua Chen,Xi Tang,Nianwen Zhu,Wenxuan Li,Qiong Mei,Shijun Yue,Yuping Tang,Qizhao Wang
The exploitation of magnetic recyclable and effective degradation photocatalysts with wide-pH-range response was essential to the practical application in the photo-Fenton process. In this study, Cd/CdS coupling with CuO/Fe 2 O 3 /CuFe 2 O 4 (CF) was employed to prepare an efficient and recyclable photocatalyst Cd/CdS-CuO/Fe 2 O 3 /CuFe 2 O 4 (CCCF). The obtained CCCF was utilized to activate H 2 O 2 for the photo-Fenton degradation of tetracycline after verifying optical properties and energy band structures. The photo-Fenton degradation performance of CCCF on tetracycline was researched in the effects of photocatalyst concentration, initial pH and H 2 O 2 volume. The photo-Fenton removal efficiency of CCCF+H 2 O 2 was capable of achieving 82.43 % under the optimal reaction condition, which was apparently higher than that of Cd/CdS and CF. The enhanced degradation efficiency could be owned to the effective carriers separation thanks to the p-n heterojunction . The development of such photocatalysts offers a new approach to degrading organic pollutants from industrial wastewater , making it a valuable tool for contaminants degradation.
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
Russian Journal of Physical Chemistry A
·
2022
·Vol. 96
·期 8
·1761-1767
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IF 0.791
Chen Yu,Liu Miao
Abstract A modified polyacrylamide gel route with urea used as fuel was used to synthesize the MFe 2 O 4 (M = Mg, Ca, Ba) iron oxides with high adsorption capacity for removal of Cd(II) from water treatment. The phase structure, functional group, porous structure and adsorption performance of MFe 2 O 4 (M = Mg, Ca, Ba) iron oxides were characterized by X-ray-diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), scanning electron microscope (SEM), N 2 adsorption–desorption isotherm and 721 spectrophotometer. The result indicates that the phase forming temperature of MFe 2 O 4 , the content of carbonate ion in MFe 2 O 4 increases with the increasing of the radius of M-site metal ion. The E g value, BET surface area and adsorption capacity for removal of Cd(II) from water treatment decreases with the increasing of the radius of M-site metal ion. The experimental isotherm of MFe 2 O 4 (M = Mg, Ca, Ba) iron oxides were described by the Langmuir model. MgFe 2 O 4 iron oxide exhibits a best adsorption performance for removal of Cd(II) from water treatment by the adsorption process, with a maximum adsorption capacity of ca. 221.36 mg/g than that of other iron oxides. The present synthetic route could be possibly extended to synthesize other porous metal oxide materials with special porous structures for various applications.
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
SCIENCE OF THE TOTAL ENVIRONMENT
·
2020
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IF 6.551
Haoyang Fu,Hongfei He,Runliang Zhu,Lan Ling,Weixian Zhang,Qingze Chen
This work successfully fabricated a novel magnetic adsorbent, i.e., phosphate modified magnetite@ferrihydrite (Mag@Fh-P), and explored its potential application for Cd(II) removal from water, soil, and sediment. To synthesize the adsorbent, ferrihydrite-coated magnetite (Mag@Fh) was firstly developed with partially acid-dissolved natural magnetite particles, followed by in-situ synthesis of ferrihydrite on magnetite surface via alkali addition. Selection of natural magnetite as iron source for ferrihydrite synthesis and as magnetic core is believed to save the cost of adsorbent. Then, phosphate was loaded on Mag@Fh by impregnation-heating treatment to produce Mag@Fh-P. Batch adsorption experiments revealed that the Cd(II) adsorption on Mag@Fh-P could reach equilibrium within 60 min, and the calculated adsorption capacity using Langmuir model was 64.1 mg/g, which was significantly higher than that on magnetite (0.44 mg/g) and Mag@Fh (23.9 mg/g). The results from X-ray photoelectron spectroscopy analysis and batch adsorption experiments confirmed that both ligand exchange and electrostatic attraction contributed to Cd(II) adsorption. Besides, Mag@Fh-P can also be an efficient amendment for soil and sediment remediation. The spent Mag@Fh-P could be easily recovered via magnetic separation, accompanied by the significant decrease in total Cd(II) concentration in soil/sediment. At an adsorbent dosage of 2 wt%, 0.82 and 0.74 mg/kg of total Cd(II) in soil and sediment was removed, respectively. In all, the synthesized Mag@Fh-P as adsorbent has the merits of cost effectiveness, fast adsorption rate, high adsorption capacity, and easy separation, and thus it has promising application for the removal of heavy metal cations from water, soil, and sediment.
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
INORGANIC CHEMISTRY
·
2022
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IF 5.436
Yulin Xie,Man Wang,Qianqian Sun,Dongmei Wang,Shuiping Luo,Chunxia Li
Combined photothermal/photodynamic therapy is a promising strategy to achieve an enhanced anticancer effect. However, hypoxia is one of the representative characteristics of the microenvironment of solid tumors, which not only attenuates the therapeutic effects but also promotes tumor invasion and metastasis. Herein, a PtBi-β-CD-Ce6 nanoplatform for the generation of sustained O2 was constructed for more effective tumor therapy. In detail, the catalase (CAT)-like nanozyme, PtBi, which could decompose H2O2 to produce O2, was modified with β-cyclodextrin (β-CD). O2 would be converted into 1O2 by PtBi-β-CD-Ce6 for enhanced photodynamic therapy (PDT) under 650 nm laser irradiation. In addition, by reason of excellent absorption in the near-infrared-II (NIR-II) region, PtBi-β-CD-Ce6 was used for photoacoustic imaging (PA) and photothermal imaging (PT)-guided photothermal therapy (PTT) in the NIR-II biowindow. Furthermore, PtBi-β-CD-Ce6 could be elected to serve as a contrast agent for X-ray computed tomography (CT) imaging due to the apparent X-ray attenuation capability of the Pt and Bi elements themselves. Therefore, by integrating the advantages of overcoming the hypoxia function and photothermal effect into a single nanoplatform, PtBi-β-CD-Ce6 showed an immense possibility in multimodal imaging-guided combined PDT/PTT.
研究领域:
生物医学工程
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肿瘤学
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纳米医学
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DOI
高影响因子
SURFACE AND INTERFACE ANALYSIS
·
2014
·Vol. 47
·期 2
·270-277
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IF 1.393
Yongli Shi,Suying Ma,Ruiqiong Tian,Yingge Zhao,Qian Jiao,Xu Ma,Qing Shang
A novel amphiphilic copolymer was synthesized from poly (ethylene glycol) methyl ether methacrylate (PEGMA950), methyl methacrylate (MMA) and acryloyl- β -cyclodextrin (acryloyl- β -CD) using the composites of (NH 4 ) 2 S 2 O 8 /NaHSO 3 as the oxidation–reduction initiators. The successful fabrication of poly(PEGMA-co-MMA-co-acryloyl- β -CD) copolymers was confirmed by Fourier transform infrared spectrometer (FTIR), 1 H-nuclear magnetic resonance ( 1 H NMR) spectra. The amphiphilic copolymer could self-assemble into nanoparticles (NPs), and their morphology and particle size distribution were characterized with transmission electron microscopy (TEM), atomic force microscope (AFM) and dynamic light scattering (DLS) methods. Ibuprofen (IBU) was encapsulated in the novel NPs, and the release profiles of IBU were investigated. FTIR and 1 H NMR spectra illustrated that the poly(PEGMA-co-MMA-co-acryloyl- β -CD) copolymers were synthesized without any residual monomers and initiators. TEM and AFM photographs suggested that the obtained NPs were spherical, and the DLS results indicated that the diameter of blank NPs was 157.3 ± 32.7 nm. The IBU release profile showed that the IBU-loaded NPs had certain pH responsibility. Copyright © 2014 John Wiley & Sons, Ltd.
研究领域:
材料科学
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药剂学
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产品关联
DOI
高影响因子
CHEMISTRY-A EUROPEAN JOURNAL
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2022
·Vol. 28
·期 46
·e202200877
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IF 5.02
Junfeng Qu,Shuhong Xu,Yiping Cui,Chunlei Wang
Graphical Cd-doped Cs 3 Cu 2 I 5 was synthesized by room-temperature grinding. [CuI 4 ] and [CdI 4 ] tetrahedrons act as photoluminescent centers separately, resulting in the emission colour manipulated by not only Cd feeding amount but also excitation wavelength. The as-prepared Cd-doped Cs 3 Cu 2 I 5 was made into anti-counterfeiting ink and printed on paper. The pattern shows different colours when the excitation wavelength increases from 310 nm to 330 nm. With the development of intellectual properties, concern about advanced anti-counterfeiting is accumulating, which conventional single-modal luminescence can no longer satisfy. As one of rapidly developing 0D materials, copper-based perovskite shows great potential to realize multiple luminescent centers for complex emissions. In this work, Cd was doped into Cs 3 Cu 2 I 5 and showed resultant emission at 560 nm which surprisingly showed a red-shifted excitation peak from that of intrinsic self-trapped emission, resulting in excitation-wavelength dependent emission. When the excitation wavelength increased from 290 nm to 330 nm, the emission of Cd-doped Cs 3 Cu 2 I 5 changed from deep blue to cold white and finally yellow. Afterwards, Cd-doped Cs 3 Cu 2 I 5 was mixed with polystyrene to prepare anti-counterfeiting ink for silk-screen printing. Meanwhile, Cd-doped Cs 3 Cu 2 I 5 maintains outstanding stability after doping, no matter under ambient, continuous UV radiation or high-temperature environment. The intensity can be almost totally recovered after heating-and-cooling cycles. This study lays groundwork for future research into multiple luminescent center manipulation in 0D materials.
研究领域:
材料科学
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光电子学
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纳米技术
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防伪技术
✓ 已验证
DOI
高影响因子
MICROCHIMICA ACTA
·
2024
·Vol. 191
·期 5
·1-12
·
IF 5.3
Wei Zhanxiang,Qin Cong,Yang Xuhui,Zhu Linghao,Zhao Xiaoyan,Cao Jianliang,Wang Yan
Abstract The detection of hazardous CO gas is an important research content in the domain of the Internet of Things (IoT). Herein, we introduced a facile metal-organic frameworks (MOFs)-templated strategy to synthesize Cd-doped Co 3 O 4 nanosheets (Cd-Co 3 O 4 NSs) aimed at boosting the CO-sensing performance. The synthesized Cd-Co 3 O 4 NSs feature a multihole nanomeshes structure and a large specific surface area (106.579 m 2 ·g -1 ), which endows the sensing materials with favorable gas diffusion and interaction ability. Furthermore, compared with unadulterated Co 3 O 4 , the 2 mol % Cd-doped Co 3 O 4 (2% Cd-Co 3 O 4 ) sensor exhibits enhanced sensitivity (244%) to 100 ppm CO at 200 °C and a comparatively low experimental limit of detection (0.5 ppm/experimental value). The 2% Cd-Co 3 O 4 NSs show good selectivity, reproducibility, and long-term stability. The improved CO sensitivity signal is probably owing to the stable nanomeshes construction, high surface area, and rich oxygen vacancies caused by cadmium doping. This study presents a facile avenue to promote the sensing performance of p-type metal oxide semiconductors by enhancing the surface activity of Co 3 O 4 combined with morphology control and component regulation. Graphical Abstract
研究领域:
材料科学
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传感器技术
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纳米技术
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环境监测
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物联网(IoT)
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产品关联
DOI
PubMed
高影响因子
JOURNAL OF LUMINESCENCE
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2013
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IF 2.144
Beibei Wang,Huan Shang,Cuiping Nie,Qi Wang,Meihu Ma,Zhaoxia Cai
A novel two-step controlled basic water phase method has been developed for synthesizing size-tunable and water-soluble CdTe/Cd(OH) 2 core/shell quantum dots with high quantum yield and good stability. The size of the prepared CdTe/Cd(OH) 2 core/shell quantum dots can be easily manipulated by varying the concentrations of NaOH solution step by step. The maximal emission wavelengths of the series CdTe/Cd(OH) 2 core/shell QDs were from 513 nm to 610 nm (emission colors tuned from green to red). The CdTe/Cd(OH) 2 core/shell quantum dots not only possess high quantum yield (up to 83%) but also exhibit excellent photostability (being stable after being stored for more than 2 months). The CdTe/Cd(OH) 2 core/shell quantum dots were characterized by transmission electron microscopy , high-resolution transmission electron microscopy, X-ray powder diffraction spectrometry , ultraviolet–visible spectrometry and fluorescence spectrometry. The water-soluble nature of the CdTe/Cd(OH) 2 core/shell quantum dots offers great potentiality for their chemical and biological applications. This method is easily controlled, low-cost and reproducible. So it is possible to extend this approach to the preparation of other size-tunable inorganic metal hydroxide capped core/shell quantum dots.
研究领域:
材料科学
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纳米技术
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生物学
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产品关联
DOI
高影响因子
POLYMERS FOR ADVANCED TECHNOLOGIES
·
2015
·Vol. 27
·期 2
·169-177
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IF 1.757
Jie Liu,Ru Cheng,Jianping Deng,Youping Wu
Chiral, pH-responsive hydrogels are constructed by poly(ethylene glycol) diacrylate/ α -cyclodextrin (PEGDA/ α -CD) inclusion complex and L- N -acryloyl-alanine or D- N -acryloyl-alanine (L-NAA or D-NAA) by an effective free radical polymerization approach. PEGDA containing two C=C end groups was used simultaneously to introduce α -CD units in the resulting hydrogels and to serve as a cross-linking agent, by which forming the designed hydrogels in quantitative yield. Hydrophilic α -CD moieties acted as pore-forming agent, while the L(D)-NAA-based polymer chains bearing –COOH groups enabled the hydrogels to display remarkable swelling–deswelling behavior in response to pH variation. The chiral NAA monomer-derived polymer chains rendered the hydrogels with intriguing optical activity, according to circular dichroism spectra. Scanning electron microscopy revealed the uniformly porous microstructures of hydrogels. More remarkably, the L-NAA-based hydrogels preferentially adsorbed trans -4-hydroxy- d -proline and preferentially released trans -4-hydroxy- l -proline, while D-NAA-based hydrogels provided opposite results. The hydrogels also demonstrated remarkable enantioselective release ability towards chiral drug ibuprofen. Copyright © 2015 John Wiley & Sons, Ltd.
研究领域:
材料科学
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生物医学工程
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DOI
高影响因子
CHEMOSPHERE
·
2021
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IF 7.086
Hui Cao,Pu Yang,Tai Ye,Min Yuan,Jinsong Yu,Xiuxiu Wu,Fengqin Yin,Yan Li,Fei Xu
A novel monodispersed Cd(II) ion-imprinted polymer (IIP) was synthesized inside core-shell mesoporous silica (C-SMS) particles to improve the diffusion kinetics of the polymer. The synthesized IIP@C-SMS was characterized and subsequently used in solid-phase extraction (SPE) for the selective adsorption of Cd(II) in aquatic samples. The results indicated that IIP had been successfully assembled inside the C-SMS particles with a high specific surface area (546.3 m 2 g −1 ) and uniform mesoporous size (2.07 nm). The obtained IIP@C-SMS takes only 15 min to reach the adsorption equilibrium due to the highly developed mesoporous structure. IIP@C-SMS also presented a maximal adsorption capacity (201.9 μmol g −1 ) for Cd(II), which was much higher than that of NIP@C-SMS (80.3 μmol g −1 ). The relative selectivity coefficient of IIP@C-SMS for Cd(II)/M(II) (M = Cu(II), Pb(II), Cr(II), and Ni(II)) were 7.15, 8.70, 7.18, and 7.36, respectively, further confirming the satisfactory selectivity of IIP@C-SMS. The adsorption isotherms of IIP@C-SMS toward Cd(II) could be described by Langmuir model; whereas the adsorption kinetics could be fitted by the pseudo-second-order model, indicating chemisorption was the rate-limiting step. The FT-IR, ITC and XPS analysis further confirmed that the Cd(II)-induced cavities during the ion-imprinting process and the coordination between Cd(II) and –SH groups were the main adsorption mechanism. Furthermore, in real samples, IIP@C-SMS-SPE adsorbed approximately 93–104% of Cd(II). This work provides new insights for the design of novel macroporous sorbents for Cd(II).
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
RSC Advances
·
2024
·Vol. 14
·期 14
·9848-9859
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IF 3.9
Shangbo Li,Zijian Liu,Xiaohan Gao,Lidi Cheng,Zexian Xu,Li Li,Yaru Diao,Liqiang Chen,Yanshan Liu,Jian Sun
Jaw defects, which can result from a multitude of causes, significantly affect the physical well-being and psychological health of patients. The repair of these infected defects presents a formidable challenge in the clinical and research fields, owing to their intricate and diverse nature. This study aims to develop a personalized bone tissue engineering scaffold that synergistically offers antibacterial and osteogenic properties for treating infected maxillary defects. This study engineered a novel temperature-sensitive, sustained-release hydrogel by amalgamating β-cyclodextrin (β-CD) with chlorhexidine (CHX) and a decellularized extracellular matrix (dECM). This hydrogel was further integrated with a polylactic acid (PLA)–nano hydroxyapatite (nHA) scaffold, fabricated through 3D printing, to form a multifaceted composite scaffold (nHA/PLA/dECM/β-CD–CHX). Drug release assays revealed that this composite scaffold ensures prolonged and sustained release. Bacteriological studies confirmed that the β-CD–CHX loaded scaffold exhibits persistent antibacterial efficacy, thus effectively inhibiting bacterial growth. Moreover, the scaffold demonstrated robust mechanical strength. Cellular assays validated its superior biocompatibility, attributed to dECM and nHA components, significantly enhancing the proliferation, adhesion, and osteogenic differentiation of osteogenic precursor cells (MC3T3-E1). Consequently, the nHA/PLA/dECM/β-CD–CHX composite scaffold, synthesized via 3D printing technology, shows promise in inducing bone regeneration, preventing infection, and facilitating the repair of jaw defects, positioning itself as a potential breakthrough in bone tissue engineering.
研究领域:
生物材料学
·
组织工程学
·
口腔医学
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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）