INORGANIC CHEMISTRY
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2023
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IF 4.6
Xiao-Yi Liu,Qiu-Ying Lin,Han Fang,Xing-Wang Li,Shu-Ming Zhang,Mei-Hui Yu,Ze Chang
Metal–organic frameworks (MOFs) have been recognized as a potential platform for the development of tunable luminophores owing to their highly modulable structures and components. Herein, two MOF luminophores based on Cd(II) ions, 1,3,5-tri(4-pyridinyl)benzene (TPB), and 1,4-dicarboxybenzene (H2BDC) were constructed. The directed assembly of the metal ions and organic linkers results in [Cd2(BDC)2(TPB)(H2O)]·x(solvent) (MOF-1) featuring TPB-based blue fluorescence centered at 425 nm. By introducing anthracene as the structure directing agent (SDA) for assembly regulation, [Cd2(BDC)(TPB)2(NO3)2]·x(solvent) (MOF-2) was obtained, which reveals anthracene feeding-dependent high tunable emission in the 517–650 nm range. Detailed components, photophysical properties, and structural characteristics investigations of MOF-2 indicate the TPB and NO3– interactions as the origin of its redshifted emission compared with that of MOF-1. Furthermore, the fluorescence of MOF-2 was found to be regulatable by the anthracene feeding based on the SDA-determined crystallinity of the crystalline sample. All these results provided a unique example of the structural and fluorescence regulation of MOF luminophores.
研究领域:
材料科学
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化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF THE INDIAN CHEMICAL SOCIETY
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2021
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IF 0.284
Lili Xu,Hongbo Suo,Renmin Liu
A facile magnetic chitosan composite used for heavy metal ions removal was prepared. The adsorbents with large specific area and rich carboxyl groups exhibited good removal of Cd(II) ions and could be easily separated with magnetic separation. The adsorption capacity of Cd(II) was 48 mg g −1 and the removal efficiency reached 86.7% after five cycles. Thus, the prepared magnetic chitosan composite could act as a potential adsorbent for Cd(II) ions removal.
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
高影响因子
CHEMOSPHERE
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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
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
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2021
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IF 13.273
Yuehua Liu,Qiang Xue,Chunwen Chang,Rong Wang,Qun Wang,Xiaohan Shan
A novel laser-induced graphene (LIG) electrode modified with SnO 2 and CeO 2 nanoparticles (NPs) was created to detect Cd(II) ions via differential pulsed anodic stripping voltammetry (DPASV). Transmission electron microscopy (TEM), scanning electron microscopy (SEM), infrared spectroscopy, X-ray photoelectron spectroscopy (XPS), electrochemical impedance spectroscopy (EIS), and contact angle (CA) analyses were used to characterize the physical and electrochemical properties of the electrode. Both the electrochemical activity and adsorption capacity of the carbon electrode were significantly enhanced. Due to the synergistic effects of SnO 2 and CeO 2 NPs, the modification enhanced the transfer of free electrons on the electrode surface, increasing the electrode sensitivity and accelerating the response speed in the detection process. The use of poly-aminobenzene sulfonic acid (p-ABSA) further increased the conductivity of the electrode. The enhanced adsorption energy and electron transfer properties of the modified electrode were also substantiated by density functional theory (DFT) calculations. Parameters such as Sn/Ce ratio, deposition time, number of polymerization cycles of p-ABSA and solution pH were optimized to determine the best detection conditions for Cd(II) ions. Under optimal conditions, our sensor showed a broad linear concentration range (0.1 ∼ 160 μg/L) with a low detection limit (0.01 μg/L). This sensor was also successfully applied for detection of Cd(II) ions in groundwater and tap water. Recovery rates ranged from 94 to 111% with a relative standard deviation (RSD) less than 6.06%. This sensor has good anti-interference ability, reproducibility and stability. Our results provide a promising sensor technique for efficient and rapid in situ monitoring of Cd(II) ions in aquatic environments.
研究领域:
环境科学
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材料科学
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分析化学
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产品关联
DOI
高影响因子
Journal of Macromolecular Science Part A-Pure and Applied Chemistry
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2019
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IF 1.163
Peng Zhou,Hua Yuan,Lijun Ou,Peng Zhiyuan
Tannin was crosslinked with paraformaldehyde to prepare tannin-phenolic polymer(TP), TP immobilized on cellulose (TPPC) was prepared by the cross-linking reaction of TP and cellulose with epichlorohydrin as crosslinking agent. Tannin was crosslinked prior to being immobilized on cellulose, which could increase the effective phenolic hydroxyl content in cellulose skeleton and improve the adsorption property of TPPC for metal ions. The maximum adsorption capacity of TPPC for Cd(II) and Cu(II) ions were 80.11 mg/g and 55.97 mg/g, respectively. The adsorption equilibrium data for the metal solutions fitted the Langmuir model well. The adsorption rate data fitted well to a Pseudo-second-order model. The TPPC has potential application value in the field of metal wastewater treatment.
研究领域:
环境科学
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高分子科学
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水处理技术
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吸附技术
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化学工程
✓ 已验证
DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2023
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IF 5.2
Jianrong Guo,Juan Wu,Junhui He,Yan Xue
As cadmium ions (Cd 2+ ) pose a serious threat to environment and human health, it is significant to develop portable, fast-response and sensitive Cd 2+ sensors for both real-time and on-site collection of such critical information. In this study, nearly monodisperse ZnS nanoparticles (NPs) were prepared and used to recognize, enrich and detect Cd 2+ ions. ZnS NPs demonstrated fast adsorption kinetics towards Cd 2+ ions (removing 99.3 % of Cd 2+ in 12 min), surpassing previously reported multiple Cd 2+ adsorption materials. Upon adsorbing Cu 2+ and Cd 2+ ions via substitution reaction, ZnS NPs gain strong peroxidase activity, and demonstrate the ability to selectively detect Cu 2+ and Cd 2+ ions among common metal ions . By further conjugating with our previous HSnS NFs (Hollow SnS nanoflower) nanosensor to eliminate the interference of Cu 2+ , the ZnS NPs nanosensor could selectively detect Cd 2+ ions with recoveries above 80 %. The ZnS NPs nanosensor can cover a wide range of Cd 2+ concentration from 0.5 to 100 μg L −1 with an extremely low detection limit of 0.38 μg L −1 . When coupling to a portable RGB sensor, as low as 0.5 μg L −1 Cd 2+ ions could be reached on-site for river water, giving an outstanding recovery of 99.4 %. The current results provide a new avenue to the on-site detection of Cd 2+ ions, and would doubtlessly contribute to the future construction of portable and intelligent sensor arrays towards complex environmental samples.
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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传感器技术
✓ 已验证
产品关联
DOI
高影响因子
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