RSC Advances
·
2025
·Vol. 15
·期 1
·48-57
·
IF 4.6
Boxuan Li,Shaoxin Wen,Jiacheng Li,Dedong He,Yongming Luo,Xiangqian Zheng,Dingkai Chen
Polysilicate-ferric-calcium-lanthanum (PSFCL) was synthesized through a co-polymerization method in order to treat the yellow phosphorus wastewater. Its morphology, composition and functional group were analyzed by X-ray Diffraction (XRD), Fourier Transform-Infrared Spectroscopy (FTIR), Scanning Electron Microscopic (SEM) and X-ray Photoelectron Spectroscopy (XPS), respectively. The optimization of the flocculant was also investigated, including La/Si molar ratio, pH, agitation time, dosage and sedimentation time. Results showed that PSFCL has reached an excellent removal efficiency of 95% and 97% towards phosphorus and fluoride, respectively. It could be inferred that charge neutralization, bridging effect and ligand exchange were the main coagulation mechanisms. As a whole, after the introduction of lanthanum, PSFCL was found to be a promising flocculant in yellow phosphorus wastewater treatment owing to its high removal efficiency and simple synthesis route.
研究领域:
环境科学
·
化学工程
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DOI
PubMed
高影响因子
Advanced Composites and Hybrid Materials
·
2024
·Vol. 7
·期 6
·1-11
·
IF 23.2
Ma Hongze,Shi Zhengyang,Yang Honghong,Yuan Wei,Liang Gemeng,Zou Jinshuo,Qian Cheng,Shen Zhaocun,Sui Kunyan
Information leakage and counterfeiting are critical global issues threatening human security and social stability. Advanced flexible anti-counterfeiting technologies are urgently needed, as flexible wearables are becoming more and more significant. In this study, we report a straightforward and efficient wet spinning technique to prepare lanthanide-alginate hybrid fibers with multicolor-emitting capabilities for flexible anti-counterfeiting. Lanthanide ions are able to coordinate with sodium alginate to endow the hybrid fibers with good molding properties, thermal stability, and homogenicity. These hybrid fibers can emit red, orange, and green fluorescence depending on the ratios of doped lanthanide elements under 254 nm UV light. The fluorescence lifetime of these hybrid fibers is longer than that of commonly used organic dyes. Notably, their fluorescence can be quenched in acidic environments or by Fe 3+ ions, which is ascribed to the weakened coordination strength between 2,2′-bipyridine with the lanthanide elements. More importantly, the hybrid fibers can be woven into various flexible anti-counterfeiting patterns. Our study demonstrates the significant flexible anti-counterfeiting potential of lanthanide-doped fibers due to their low cost, ease of fabrication, and flexibility. Graphical The multicolor-emitting lanthanide-alginate hybrid fibers with multi-stimuli responsiveness are produced through a simple wet spinning process and can be woven into various patterns for flexible anti-counterfeiting.
研究领域:
材料科学
·
光学
·
化学
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产品关联
DOI
高影响因子
Journal of Environmental Chemical Engineering
·
2022
·
IF 7.968
Caiyun Han,Jing Xie,Xize Min
Due to the non-degradable of heavy metal, adsorption has been extensively applied to abatement it. Most studies were focused on uptake metal ions via electrostatic attraction and ion exchange, and load molecule H 3 AsO 4 from strongly acidic wastewater was still challenging. To solve the problem, bimetallic La–Zr MOFs was facilely fabricated in this work, and the fcu topology structure of La-Zr MOFs was remained well under the investigate crystallization time and crystallization temperature. However, the crystallinity of the obtained La-Zr MOFs was influenced by the synthesized factors. The obtained La–Zr MOFs was employed as adsorbent to removal Cr(VI) and As(V), and the performance was evaluated by the batch experiment. The result indicated that the adsorption performance of Cr(VI) and As(V) was positively correlated with the crystallinity , and the optimal sample was 1LaUN 12 . From the XPS characterization, it was found that H 3 AsO 4 was successfully uptake over 1LaUN 12 surface, and the maximum monolayer adsorption capacity was 83.40 mgH 3 AsO 4 /g via ligand exchange and coordination reactions with La−OH and Zr−OH. In addition, the sample 1LaUN 12 also exhibited the excellent Cr(VI) load performance, and the maximum monolayer adsorption capacity of Cr(VI) was 222.5 mg/g. Above 40% Cr(VI) was reduced to Cr(III) by amino groups, and immobilized over the surface of 1LaUN 12 . Eventually, 1LaUN 12 displayed a good structural stability in the acidic medium, which was in favor of removing Cr(VI) and As(V) efficiently from strongly acidic solutions.
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
APPLIED SURFACE SCIENCE
·
2022
·
IF 7.392
Zhao Li,Lei Wu,Min Chen,Qiwu Zhang,Shujuan Dai,Tonglin Zhao
Bismuth oxyiodide is one of the bismuth-based semiconductors which exhibits narrow band gaps and excellent visible light response, however modification strategies are usually desired for improving its photocatalytic reactivity. In this context, introduction of valuable components into the interlayer of BiOI is expected to work, considering its typical layered structure. In this case, mechanochemical synthesis of BiOI, with simultaneous introduction of lanthanum into its interlayer to form Bi 1-x La x OI, was conducted for the first time, and arsenic (As(III)) was selected to evaluate the photocatalytic reactivity, demonstrating excellent reaction efficiency for arsenic oxidation under a mild condition. Characterizations confirmed the incorporation of La and the presented well crystalline structure of Bi 1-x La x OI, and revealed its better visible light absorption capacity than raw BiOI. Besides the excellent electronic conductivity of Bi 0.9 La 0.1 OI, photogenerated holes (h + ) and superoxide radical species (· O 2 - ) were characterized by electron spin resonance (ESR) test, to act as predominant reactive groups during the photo-induced oxidation reaction. These findings provided a novel concept for the interlayer decoration of BiOI, and offered an alternative approach to develop its potential application for the removal of hazardous arsenic pollutants.
研究领域:
环境科学
·
材料科学
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DOI
高影响因子
APPLIED CLAY SCIENCE
·
2020
·
IF 4.605
Hongyun Chen,Chang Lu,Huaming Yang
The development of a facile method to fabricate eco-friendly and efficient adsorbents for removing phosphate from wastewater is urgently needed. In this study, a low-cost, eco-friendly, and high-performance composite, with highly dispersed lanthanum compounds (lanthanum oxynitrate and lanthanum oxycarbonate) on the two-dimensional (2D)-layered rectorite (REC) nanoclay , was synthesized via a one-pot calcination method. Lanthanum compounds-modified rectorite composite (La-REC) was analyzed to confirm the combination between lanthanum compounds and the surface of REC. La-REC perfectly followed the Langmuir-Freundlich model and exhibited a superior adsorption capacity of 147.6 mg P/g for phosphate, higher than that of both REC and La(OH) 3 . More importantly, it demonstrated high performance for phosphate adsorption within pH ranging from 4.0 to 7.0, and showed a high adsorption selectivity toward phosphate among coexisting ions during the adsorption process . La-REC could efficiently remove phosphate from real wastewater . Furthermore, lanthanum compounds and REC nanoclay had a synergistic effect of increasing the phosphate uptake. The mechanism of phosphate removal by La-REC was investigated, including ligand exchange , electrostatic attraction , complexation, and precipitation. Overall, La-REC provides feasibilities to synthesize the low-cost, eco-friendly, and high-performance adsorbents for phosphate removal , which can offer potential applications in phosphate adsorption for practical pollutant purification.
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
JOURNAL OF LUMINESCENCE
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2021
·
IF 3.599
Sicong Zhao,Min Gao,Jingfang Li
Lanthanides-based luminescent hydrogels emitting green and red luminescence have been fabricated successfully by the coordinative self-assembly of 1,3,5-benzenetricarboxylic acid (H 3 BTC) and lanthanide ions (Tb 3+ or Eu 3+ ). And the hydrogel with yellow emission color can be obtained by controlling the molar ratio of Tb 3+ to Eu 3+ at 9/1. Fourier-transform infrared spectroscopy and X-ray photoelectron spectroscopy confirmed the formation of coordination bonds between H 3 BTC and lanthanides. Scanning electron microscopy images showed that the hydrogels formed 3D porous structures. Luminescent spectra, luminescent decay curves, and digital images indicated that the H 3 BTC-lanthanides hydrogels can be applied as luminescent inks for anti-counterfeiting. Importantly, the rational designed multiple encryption strategies were applied for improving the anti-counterfeiting level. This work provides an alternative strategy to prepare lanthanides-based luminescent materials for anti-counterfeiting.
研究领域:
材料科学
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光学
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产品关联
DOI
高影响因子
RSC Advances
·
2018
·Vol. 8
·期 21
·11754-11763
·
IF 2.936
Xintong Zhang,Wei Wang,Shiyu Dai,Fuyi Cui
Both phosphate and organic carbon can serve as nutrients for microorganism growth. Simultaneous removal of both nutrients would realize the antibacterial strategy of nutrient starvation better to ensure water quality safety. In addition, a short treatment time is the premise for the application of a material in water treatment. Herein, carbon-coated lanthanum nanorods with a uniform distribution of La and C (C–La-MOF) were rationally prepared through glucose and La-MOF hydrothermal treatment and further carbonization to synchronously and rapidly remove phosphate and organic matter. The carbon layer thickness was tuned by varying the hydrothermal time to find the optimal balance between excellent phosphate intake and low lanthanum leakage. C–La-MOF had a strong anti-interference ability and high phosphate capture capacity over a wide pH range of 2–12. Impressively, when phosphate and organic carbon coexisted in solution, their removal performances remained relatively unchanged compared with that when the two nutrients existed independently, and their adsorption equilibriums could be easily reached within 10 min. All of the above results prove that C–La-MOF is a promising material for practical drinking water treatment.
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
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2020
·
IF 5.162
Yumeng Zhao,Lixue Gai,Hao Liu,Qingda An,Zuoyi Xiao,Shangru Zhai
In order to alleviate the environmental problems caused by excessive discharge of phosphate, an environmental friendly and highly efficient bio-sorbent (SA-La@PEI) for phosphate was fabricated by combing strategies of sorption affinity component mediated and poly(ethylenimine) surface engineering of alginate beads. Various characterization methods like SEM, FTIR, XRD and XPS were adopted to examine the morphology and functional group composition of SA-La@PEI. Through detailed tests, SA-La@PEI exhibited excellent adsorption performance of 121.2 mg/g, which was better than most published materials. More importantly, the outstanding phosphate selectivity of SA-La@PEI was exposed when NO 3 − , HCO 3 − , SO 4 2− and Cl − were added to the phosphate solution. Considering the integrated components in composites, both chemical precipitation and electrostatic attraction can be considered as the dominant mechanisms of phosphate adsorption. Totally, as-prepared SA-La@PEI beads might be a promising sorbent for the decontamination of excessive phosphate because of its low-cost, excellent adsorption performance and mechanical strength.
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
CATALYSIS TODAY
·
2018
·
IF 4.667
Mengke Liu,Yingnan Zhao,Huawang Zhao,Xianghui Li,Yuhan Ma,Xin Yong,Hong Chen,Yongdan Li
A number of M-Cu-ZSM-5 (M = La, Ni, La-Ni) samples were prepared via an aqueous solution ion-exchange method. The co-doping with Ni and La into a Cu-ZSM-5 catalyst enhanced the NO decomposition activity in a temperature range 350–550 °C. The characterization results indicate that doping with La effectively improved the dispersion of the Cu species forming more Cu 2+ ions in the sample, while the effect of Ni is likely to facilitate the implantation of Cu 2+ to form (Cu 2+ -O 2– -Cu 2+ ) 2+ dimers. The synergistic effect of La and Ni contributes to the increased (Cu 2+ -O 2− -Cu 2+ ) 2+ content in the co-doped sample, thus enhancing the NO decomposition activity.
研究领域:
催化化学
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环境科学
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DOI
高影响因子
Small
·
2018
·Vol. 14
·期 29
·1801405
·
IF 9.598
Lie Wu,Jiahong Wang,Jiang Lu,Danni Liu,Na Yang,Hao Huang,Paul K. Chu,Xue-Feng Yu
Black phosphorus (BP) possesses unique physical properties and, owing to its intrinsic instability, the proper surface and chemical coordination is the key point in many applications. Herein, a facile and efficient surface lanthanide-coordination strategy based on lanthanide (Ln) sulfonate complexes is designed to passivate and functionalize different BP-based nanostructures including quantum dots, nanosheets, and microflakes. By means of Ln–P coordination, the lone-pair electrons of phosphorus are occupied, thus preventing oxidation of BP, and the LnL 3 @BP exhibits excellent stability in both air and water. Furthermore, accompanied by the original photothermal performance of BP nanostructures, the Gd-coordinated BP has high R 1 relativities in magnetic resonance (MR) imaging, and other Ln (Tb, Eu, and Nd) coordinated BP structures exhibit fluorescence spanning the visible to near-infrared regions. Not only is LnL 3 surface passivation an efficient method to enhance the stability of BP, but also the MR or fluorescence derived from lanthanide ions extends the application of BP to optoelectronics and biomedical engineering.
研究领域:
材料科学
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生物医学工程
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光学
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产品关联
DOI
PubMed
高影响因子
SCIENCE OF THE TOTAL ENVIRONMENT
·
2022
·
IF 10.753
Zhihao Chen,Bingfeng Lin,Yingping Huang,Yanbiao Liu,Yonghong Wu,Rui Qu,Cilai Tang
Biochar (BC) derived from orange peels was modified using LaCl 3 to enhance its tetracycline (TC) adsorption capacity. SEM-EDS, FT-IR, XRD, and BET were used to characterize the physiochemical characteristics of La-modified biochar (La-BC). Batch experiments were conducted to investigate the effects of several variables like pyrolysis temperature, adsorbent dosage, initial pH, and coexisting ions on the adsorption of TC by La-BC. XPS and density functional theory (DFT) were used to elucidate the TC adsorption mechanism of La-BC. The results demonstrated that La was uniformly coated on the surface of the La-BC. The physiochemical characteristics of La-BC highly depended on pyrolysis temperature. Higher temperature increased the specific surface area and functional groups of La-BC, thus enhancing its TC adsorption capacity. La-BC prepared at 700 °C (BC@La-700) achieved the maximum adsorption capacity of 143.20 mg/g, which was 6.8 and 4.6 times higher than that of BC@La-500 and BC@La-600, respectively. The mechanisms of TC adsorption by La-BC were most accurately described by the pseudo-second-order kinetic model. Furthermore, the adsorption isotherm of La-BC was consistent with the Freundlich model. BC@La-700 achieved good TC adsorption efficiencies even at a wide pH range (pH 4–10). Humic acid significantly inhibited TC adsorption by La-BC. The presence of coexisting ions (NH 4 + , Ca 2+ , NO 3 − ) did not significantly affect the adsorption capacity of La-BC, particularly BC@La-700. Moreover, BC@La-700 also exhibited the best recycling performance, which achieved relative high adsorption capacity even after 5 cycles. The XPS results showed that π-π bonds, oxygen-containing functional groups, and La played a major role in the adsorption of TC on La-BC. The result of DFT showed that the adsorption energy of La-BC was the greatest than that of other functional groups on biochar. Collectively, our findings provide a theoretical basis for the development of La-BC based materials to remove TC from wastewater.
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
CARBON
·
2015
·
IF 6.196
Zhan Zhou,Qianming Wang,Jinyong Wang,Cheng Cheng Zhang
New chemical sensors based on lanthanide emission that enable sequential detection of two targets in live cells have been developed. The indicator molecules (unsaturated europium complexes) were covalently immobilized on carbon quantum dots (CQDs), and a water soluble fluorescent nano-probe ( CQDs-DTPA-Eu ) with biocompatibility was fabricated. A novel stepwise assembly method was used to generate unique responses to two different targets sequentially. Rapid and highly selective detection of tetracycline (Tc) in water and milk (detection limit 32 nM) were demonstrated. The in situ generated CQDs-DTPA-EuTc was non-emissive, but, upon addition of hydrogen peroxide (detection limit 21 nM) intense red luminescence was observed. Highly reproducible results were obtained in Plat-E cells, demonstrating the identification of tetracycline and H 2 O 2 in cellular environment with high accuracy.
研究领域:
生物化学
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分析化学
·
细胞生物学
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产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）