MICROCHEMICAL JOURNAL
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2019
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IF 3.206
Chendi Jia,Yiduo Mi,Zikai Liu,Wenfeng Zhou,Haixiang Gao,Sanbing Zhang,Runhua Lu
A facile synthetic method of attapulgite@covalent organic frameworks was reported in this study. The composite was synthesized by covalently grafting covalent organic frameworks (synthesized from 1,3,5-triformylphloroglucinol and p -phenylenediamine) onto attapulgite at room temperature and was characterized by Fourier transform infrared spectroscopy, X-ray diffraction, zeta potential analysis, transmission electron microscopy, scanning electron microscopy, X-ray photoelectron spectroscopy and Brunauer-Emmett-Teller measurement. The synthesized nanocomposite was used as a sorbent in dispersive solid phase extraction to extract pyrethroids from environmental water samples, and the parameters affecting the extraction efficiency were optimized. The linear range of the four pyrethroids was 2.5–500 μg L −1 , and the enrichment factors ranged from 65.0 to 68.2. The method detection limits were between 0.83 and 1.79 μg L −1 under the optimal conditions. In addition, the intra-day and inter-day precision were 1.4%–4.8% and 2.7%–3.6%, respectively. Finally, the method was successfully applied to extract pyrethroids from real water samples with relative recoveries ranging from 71.2% to 88.7%.
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JOURNAL OF CHROMATOGRAPHY B-ANALYTICAL TECHNOLOGIES IN THE BIOMEDICAL AND LIFE SCIENCES
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2018
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IF 2.441
Xiaoling Yang,XiWen Lin,YiDuo Mi,Haixiang Gao,Jing Li,Sanbing Zhang,Wenfeng Zhou,Runhua Lu
In this study, a novel ionic liquid-type surfactant modified attapulgite named as 1-dodecyl-3-methylimidazolium bromide-attapulgite (C 12 MIM-ATP) is successfully prepared and applied in dispersive solid phase extraction (dSPE) for the fast determination of pyrethroid residues in tea drinks. The primary factors that influenced the extraction efficiency, including sorbent type, amount of sorbent, extraction time, desorption conditions, pH and ionic strength , are investigated. The optimized results reveal that the extraction and desorption equilibria are rapidly obtained within 1 min. Under the optimized conditions, good linearity (2–500 μg/L) is observed for four pyrethroids in tea drinks with determination coefficients (r 2 ) ranged from 0.9992 to 1.0000. The limits of detection (LODs) are 0.6 μg/L for all pesticides. Acceptable extraction recoveries of target analytes are found from 90.28 to 107.56% with relative standard deviations (RSDs) less than 8.30% in real tea drink samples. The batch-to-bath repeatability is evaluated by recovery test on five independent synthesized C 12 MIM-ATP sorbents. Satisfactory batch-to-batch repeatability is obtained with the recovery factors varied in 15%. A small matrix effect is observed using C 12 MIM-ATP as the sorbent for detection pyrethroids in tea drinks.
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高影响因子
Nanomaterials
·
2022
·Vol. 12
·期 22
·3931
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IF 5.719
Weikai Sun,Hongxiang Ou,Ziwei Chen
Adsorption is one of the effective methods of treating dye wastewater. However, the selection of suitable adsorbent materials is the key to treating dye wastewater. In this paper, GO−ATP was prepared by an intercalation method by inserting graphene oxide (GO) into the interlayer of alabaster attapulgite (ATP), and GO−ATP@CS−PVA aerogel was prepared by co−blending−crosslinking with chitosan (CS) and polyvinyl alcohol (PVA) for the adsorption and removal of crystalline violet dye from the solution. The physicochemical properties of the materials are characterized by various methods. The results showed that the layer spacing of the GO−ATP increased from 1.063 nm to 1.185 nm for the ATP, and the specific surface area was 187.65 m2·g−1, which was 45.7% greater than that of the ATP. The FTIR results further confirmed the success of the GO−ATP intercalation modification. The thermogravimetric analysis (TGA) results show that the aerogel has good thermal stability properties. The results of static adsorption experiments show that at 302 K and pH 9.0, the adsorption capacity of the GO−ATP@CS−PVA aerogel is 136.06 mg·g−1. The mass of the aerogel after adsorption−solution equilibrium is 11.4 times that of the initial mass, with excellent adsorption capacity. The quasi−secondary kinetic, Freundlich, and Temkin isotherm models can better describe the adsorption process of the aerogel. The biobased composite aerogel GO−ATP@CS−PVA has good swelling properties, a large specific surface area, easy collection and a low preparation cost. The good network structure gives it unique resilience. The incorporation of clay as a nano−filler can also improve the mechanical properties of the composite aerogel.
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TALANTA
·
2017
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IF 4.162
Tingting Wang,Yihui Chen,Junfeng Ma,Zhenfeng Jin,Mengsa Chai,Xunwen Xiao,Lihua Zhang,Yukui Zhang
In current study, a new polyethyleneimine (PEI)-modified attapulgite material was prepared serving as a solid support in matrix solid-phase dispersion for the extraction and determination (by atomic absorption spectrometry) of cadmium in seafood products. The major factors affecting PEI grafting were optimized using various PEI amounts and molecular weights . Parameters pivotal to MSPD extraction efficiency, like: pH, volume of eluting solvent, and the sorbent mass-to-sample ratio were investigated. Quantitative recoveries were achieved with 0.21 g of fish sample, 0.13 g of PEI-modified attapulgite dispersing agent , and 50% HNO 3 eluting solution. The limit of detection and the limit of quantification were found to be 2.5 and 8.3 μg kg −1 for cadmium in surimi samples, respectively. The recoveries were in the range of 89.2–100.1%, with RSDs ranged from 3.0% to 7.9% (n = 5). When compared to the method stipulated by the Chinese National Standard GB 5009.15-2014, the newly developed MSPD provides comparable accuracy and even better repeatability for the analysis of the cadmium in real seafood samples.
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ACS Sustainable Chemistry & Engineering
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2017
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IF 5.951
Zhi Zhu,Yang Yu,Hongjun Dong,Zhi Liu,Chunxiang Li,Pengwei Huo,Yongsheng Yan
A novel magnetic intercalation Fe3O4-QDs@g-C3N4/ATP photocatalyst was first prepared by a combined eutectic method with deposition technology; it shows superior degradation efficiency for removing 2-mercaptobenzothiazole (MBT) under visible light. The improved photocatalytic performance is mainly attributed to the intercalation effect of attapulgite (ATP) in g-C3N4 together with the quantum effect of Fe3O4 quantum dots (QDs) and the better conductivity between ATP and g-C3N4 resulting in the enhanced separation efficiency of photogenerated electron–hole pairs in the light absorption range. Moreover, insight into this mechanism indicates that the holes and superoxide radicals are the major active species in the MBT removal procedure. This work provides an efficient and promising approach to construct new high-performance g-C3N4-based photocatalytic materials for wastewater treatment.
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INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
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2024
·
IF 7.7
Haicun Yang,Kaide Wu,Jianbo Zhu,Yongxiang Lin,Xudong Ma,Zheng Cao,Wenzhong Ma,Fanghong Gong,Chunlin Liu,Ji Pan
To avoid the weakness (lower adsorption rate and selectivity) of peach gum polysaccharide (PGP) and improve the adsorption performance of polyacrylamide (PAAm) hydrogel (lower adsorption capacity), in the present work, the PGP was chemically tailored to afford ammoniated PGP (APGP) and quaternized PGP (QPGP), and attapulgite (ATP) was bi-functionalized with cation groups and carbon‑carbon double bond. Then, PAAm/APGP and PAAm/QPGP/ATP hydrogels were synthesized via redox polymerization. The synthesis procedure and properties of hydrogels were traced by FTIR, SEM, XPS, TGA, TEM, and BET methods, and the dye adsorption performance of the hydrogels was evaluated using the new coccine (NC) and tartrazine (TTZ) aqueous solutions as the model anionic dyes. Effects of initial dye concentration, pH, and ionic strength on the adsorption were investigated. Compared with PAAm/APGP hydrogel, PAAm/APGP/ATP hydrogel exhibits higher adsorption rate, superior adsorption capacity, stability, and selectivity towards anionic dye. The adsorption process of PAAm/QPGP/ATP hydrogel reached equilibrium in about 20 min and followed the pseudo-second-order kinetic model and Langmuir isotherm. The adsorption capacities towards NC and TTZ of PAAm/QPGP/ATP hydrogel were calculated as 873.235 and 731.432 mg/g. This hydrogel adsorbent originating from PAAm, PGP, and ATP shows great promise for application in practical water treatment.
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INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
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2023
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IF 8.2
Yadong Tan,Shijie Fan,Xiaoyu Wu,Menggege Liu,Ting Dai,Chun Liu,Su Ni,Jiafeng Wang,Xiuchen Yuan,Hongbin Zhao,Yiping Weng
Bone tissue engineering scaffolds have made significant progress in treating bone defects in recent decades. However, the lack of a vascular network within the scaffold limits bone formation after implantation in vivo . Recent research suggests that leonurine hydrochloride (LH) can promote healing in full-thickness cutaneous wounds by increasing vessel formation and collagen deposition. Gelatin and Sodium Alginate are both polymers. ATP is a magnesium silicate chain mineral. In this study, a Gelatin/Sodium Alginate/Nano-Attapulgite composite hydrogel was used as the base material first, and the Gelatin/Sodium Alginate/Nano-Attapulgite composite polymer scaffold loaded with LH was then created using 3D printing technology. Finally, LH was grafted onto the base material by an amide reaction to construct a scaffold loaded with LH to achieve long-term LH release. When compared to pure polymer scaffolds, in vitro results showed that LH-loaded scaffolds promoted the differentiation of BMSCs into osteoblasts, as evidenced by increased expression of osteogenic key genes. The results of in vivo tissue staining revealed that the drug-loaded scaffold promoted both angiogenesis and bone formation. Collectively, these findings suggest that LH-loaded Gelatin/Sodium Alginate/Nano-Attapulgite composite hydrogel scaffolds are a potential therapeutic strategy and can assist bone regeneration.
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Green Energy & Environment
·
2024
·
IF 10.7
Chao Jiang,Xiaoli Liu,Xingpeng Wang,Qihui Wang,Huiyu Li,Weiliang Tian,Saeed Ahmed,Yongjun Feng
Coupling adsorption and in-situ Fenton-like oxidation process was developed for Methylene blue (MB) using refined iron-containing low-grade attapulgite (ATP) clay, and the removal mechanism was investigated. The MB was initially adsorbed on the porous ATPs, and then the enriched MB was removed by the H 2 O 2 -assisted Fenton-like oxidation with the iron-containing ATP catalyst. Under optimal conditions, the ATP powder exhibits the maximum removal efficiency of 100% with negligible iron leaching (1.5 mg L -1 ) and no sludge formation. Furthermore, polysulfone/ATP (PSF/ATP) pellets were fabricated through a water-induced phase separation process to construct a fixed-bed reactor (FBR) for continuous contaminant removal. For the first cycle, the maximum adsorption capacity was 15.5 L with an outlet MB concentration of 1.973 mg L -1 (˂ 2 mg L -1 , GB4287-2012) using the PSF/ATP pellets containing 50.0 g of ATP powders, and the maximum Fenton-like oxidation capacity was 35.5 L with the outlet concentration of 0.831 mg L -1 . After five cycles, the total treated volume of the MB solution was ca. 255 L, and the efficiency remained above 99%. After 10 hours of continuous treatment towards practical resin industrial wastewater, the chemical oxygen demand (COD) removal efficiency was still measured at 83.05%, costing 0.398 $ m -3 . These results demonstrate the practical applicability of iron-containing low-grade ATP clay for textile water treatment.
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JOURNAL OF CHROMATOGRAPHY A
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2012
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IF 4.531
Chuande Zhao,Xingmei Guan,Xiaoyan Liu,Haixia Zhang
A molecularly imprinted polymer was synthesized by ultrasonic irradiation, with attapulgite as matrix using β-naphthol as the template molecule, acryloyl-β-cyclodextrin as the functional monomer, and N,N-methylenebiacrylamide as the cross-linking agent, respectively. The imprinted polymer was characterized by infrared spectroscopy and transmission electron microscopy. Compared to polymers prepared by traditional heat sources, the molecularly imprinted polymer synthesized by ultrasonic irradiation had better selectivity and faster adsorption kinetics to estriol, estradiol, estrone and diethylstilbestrol. Using the imprinted polymer as the packing material for on-line solid-phase extraction, the above four estrogens in milk samples were concentrated and analyzed. The limits of detection for these estrogens were in the range of 1–8 ng g −1 and reproducibility were less than 5.1% as RSDs ( n = 6) with milk samples spiked at 100 and 1000 ng g −1 of each analyte.
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ANALYTICAL LETTERS
·
2025
·
IF 1.8
Yating Liu,Li Tian,Yuan Gao,Zhonghai Tang,Yuzhu Xiong
An attapulgite-multi-walled carbon nanotube (ATP-CNTs) composite material was synthesized to enhance the QuEChERS method. When coupled with ultra-performance liquid chromatography-tandem mass spectrometry (UPLC-MS/MS), an accurate, rapid, and reliable analytical method was established for the determination of multiple pesticide residues in tea. The ATP-CNTs purification agent was characterized by Fourier transform infrared spectroscopy (FT-IR), X-ray photoelectron spectroscopy (XPS), and scanning electron microscopy (SEM). Pesticides in tea were extracted under ultrasonication using water and acetonitrile, followed by purification with ATP-CNTs. Key experimental parameters—including extraction solvent, extraction time, soaking time, soaking water temperature, adsorbent combination ratio, and adsorbent amount—were systematically optimized. Under optimal conditions, the method’s limits of detection (LOD) and quantification (LOQ) were 1.05–4.11 μg/kg and 3.49–13.69 μg/kg, respectively. Recovery experiments at three spiked concentration levels yielded average recoveries ranging from 75.2% to 114.3%, with relative standard deviations (RSDs) between 2.3% and 13.8%. The results demonstrate that this method is simple, accurate, rapid, and suitable for the detection of relevant pesticide residues in tea.
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MATERIALS CHEMISTRY AND PHYSICS
·
2019
·
IF 2.781
Haicun Yang,Zinan Cai,Haotian Liu,Zheng Cao,Yanping Xia,Wenzhong Ma,Fanghong Gong,Guoliang Tao,Chunlin Liu
In this work, we proposed the tuning of the interface between attapulgite (ATP) and polycarbonate (PC) by the surface tailoring of ATP via a combination of RAFT polymerization and alkynyl-thiol click reaction. The side alkynyl-functionalized random copolymer poly(MMA- co -PgMA) was synthesized as the immobilization block via redox-initiated room-temperature RAFT copolymerization of MMA and propargyl methacrylate (PgMA). Then, the dispersion block was synthesized by room-temperature RAFT polymerization of MMA using poly(MMA- co -PgMA) as the macro chain transfer agent to afford poly((MMA- co -PgMA)- b -MMA). FTIR, 1 H NMR, gel permeation chromatograph (GPC), and kinetic results indicated the successful synthesis of copolymers with well-defined structures. Copolymers with different length of PMMA segment were tethered onto the surface of thiol-functionalized ATP via alkynyl-thiol click reaction to mediate the interfacial interaction between ATP and PC, the successful covalent grafting of copolymers was confirmed by FTIR, TGA , XPS and XRD , and the effects of dispersion blockchain length on nanocomposites were investigated. The functionalized ATP demonstrated an improved dispersity in nanocomposites and enhanced mechanical properties with increasing dispersion blockchain length. The PC nanocomposites with functionalized ATP showed lower T g and complex viscosity as compared to that of pure PC and nanocomposites with bare ATP, which enhanced the processability of nanocomposites.
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Journal of Macromolecular Science Part B-Physics
·
2024
·
IF 1.2
Qingting Ni,Haicun Yang,Fanghong Gong,Jiaye Mao,Liping Xu,Dan Liu,Guyuan Bin
To further improve the comprehensive properties of polycarbonate/acrylonitrile–butadiene–styrene terpolymer blends (PC/ABS), in this work, styrene–acrylonitrile copolymer [P(St-co-An)] was grafted on the surface of attapulgite particles (ATP) by simultaneous reverse and normal initiation ATRP (SR&NI ATRP) to yield ATP@P(St-co-An) hybrid particles. Then a series of PC/ABS/ATP@P(St-co-An) composites were prepared via the melt blending method. The effects of ATP@P(St-co-An) content on the morphological, mechanical, thermal and rheological properties of the composites were investigated in detail. The core-shell ATP@P(St-co-An) hybrid particles with the polymer layer thickness of 20-40 nm were synthesized successfully according to the results of X-ray photoelectron spectrometer (XPS), Fourier transform infrared spectrometer (FTIR), gel permeation chromatography (GPC), thermogravimetric analysis (TGA) and transmission electron microscopy (TEM). The improvement in mechanical properties, reduced glass transition temperature (Tg) difference between PC and ABS and micromorphology changes of the composites proved the compatibilization, strengthening, and toughening effect of the ATP@P(St-co-An). Compared with the PC/ABS blend, with strength and toughness of 50.8 MPa and 56.3 kJ/m2, when the ATP@P(St-co-An) content was 4 wt%, a reasonable balance (85.8 MPa and 86.2 kJ/m2) between strength and toughness was achieved with substantially enhanced thermal stability. Moreover, the composite showed more remarkable non-Newtonian behavior, and its processability was also improved. We believe this work provides an effective approach to optimize the compatibility and comprehensive properties of PC/ABS blends.
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