JOURNAL OF HAZARDOUS MATERIALS
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2017
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IF 6.065
Jun Xu,Xiaoke Shen,Lei Jia,Tao Zhou,Tieliang Ma,Zhouqing Xu,Jianliang Cao,Zhijun Ge,Ning Bi,Taofeng Zhu,Shengli Guo,Xiaohui Li
A palygorskite (Pal)-based ratiometric fluorescent nanoprobe is designed in order to establish a real time, on-site visual, and highly sensitive detection method for tetracyclines (TCs). The nanoprobe comprises the green emissive dye molecules embedded in the natural Pal, which serve as the internal reference signal. The potential red-emissive seed-europium (Eu 3+ ) ions are covalently bound on the surface of modified Pal, and they can act as the specific recognition element. The emission intensity of Eu 3+ ions significantly increases upon TC addition. The nanoprobe fluorescence changes from green to yellow, orange, or red, thereby accomplishing the visual ratiometric fluorescent detection. This nanoprobe exhibits a high sensitivity with a detection limit of 7.1 nM and an excellent selectivity in monitoring the levels of TCs in milk samples. In addition, this nanoprobe is useful for quantitative determination of TCs, and it is not affected with intensity fluctuations due to instrumental or environmental factors. The nanoprobe-immobilized test paper realizes real-time TCs analysis by using a smartphone with an easy-to-access color-scanning APP as the detection platform. Moreover, the reported construction of visual ratiometric detection system follows the sustainable development idea, that is, from nature, for nature, and into the nature.
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PubMed
高影响因子
APPLIED CLAY SCIENCE
·
2024
·
IF 5.3
Qiyi Lu,Bingying Gao,Xiazhang Li,Feng Xiong,Chenxi Zhuang,Chao Yao
Significant advances have been made in the treatment of volatile organic compounds (VOCs), but effective adsorption in humid environments remains a critical challenge. A trade–off typically exists between improving hydrophobicity and maintaining adsorption capacity. In this work, we present an innovative approach to enhance hydrophobicity without compromising adsorption performance. Palygorskite (Pal) was coated with a molecular sieve (type: MCM–41) via an in–situ growth method, and the resulting composite (Pal/M) was further modified with 3–aminopropyl triethoxysilane (APTES) to prepare NH 2 –Pal/M through post–synthesis modification. By increasing the silicon content, reducing hydroxyl groups, and introducing amine groups, the hydrophobicity of the material was significantly enhanced while preserving its adsorption properties. NH 2 –Pal/M exhibited superior adsorption capacity compared to pure Pal and MCM–41, achieving a maximum adsorption capacity of 291 mg·g −1 for formaldehyde and 322 mg·g −1 for acetaldehyde in static adsorption tests. In dynamic experiments at 0 % humidity, NH 2 –Pal/M achieved breakthrough times of 67 min (breakthrough adsorption capacity: 3.946 mg·g −1 ) for formaldehyde and 49 min (8.420 mg·g −1 ) for acetaldehyde. Even at 80 % humidity, it retained breakthrough times of 24 min (1.399 mg·g −1 ) for formaldehyde and 18 min (3.122 mg·g −1 ) for acetaldehyde, demonstrating its hydrophobic nature and effective performance in humid conditions. This study highlights a cost–effective approach to synthesizing adsorbent materials from natural porous minerals, providing a practical solution for VOCs treatment in water vapor–rich environments such as industrial emissions.
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高影响因子
APPLIED CLAY SCIENCE
·
2020
·
IF 4.605
Sheng Wang,Hengdong Ren,Wei Lian,Jiangzhe Wang,Yan Zhao,Yin Liu,Tianshu Zhang,Ling Bing Kong
The effect of ball-to-powder weight ratio on the crystal composition, microscopic morphology and pore structure of palygorskite was systematically studied by using the conventional wet ball milling process. The quartz can be effectively separated from palygorskite through low-speed centrifugal treatment in aqueous solutions, while the strength of ball milling has a significant influence on disaggregation degree of the crystal bundles. When the ratio is 1:2, the rod crystal bundles are well dissociated, while preserving the inherent aspect ratio of the nanofibers. After the treatment, the specific surface area, micropore volume and micropore area are increased from 206.87 m 2 /g, 0.0347 cm 3 /g and 76.07 m 2 /g to 255.03 m 2 /g, 0.0502 cm 3 /g and 109.42 m 2 /g, respectively. For the first time, the purified palygorskite was used as a template to prepare palygorskite/Fe 3 O 4 nanocomposite using by hydrothermal method , for microwave absorbing applications. As expected, the introduction of palygorskite can effectively prevent the aggregation of the Fe 3 O 4 magnetic particles. Meanwhile, the specific surface area of the composite is enlarged from 10.29 m 2 /g to 40.73 m 2 /g, as the weight ratio of Fe 3 O 4 and palygorskite is 2:1, thus leading to enriched interface polarizations and hence resulting in a maximum reflection loss (RL) of −40.41 dB at 4.80 GHz, with effective absorption frequency that can be adjusted over 2–18 GHz by controlling thickness of the composite.
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高影响因子
MATERIALS RESEARCH BULLETIN
·
2017
·
IF 2.446
Jixiang Xu,Jianyang Gao,Yong Liu,Qingyun Li,Lei Wang
A facile method for fabrication of In 2 O 3 /Co 3 O 4 @palygorskite composites from a Co/In-based metal-organic framework (MOF) was reported. First, Co/In-MOFs hybridized with palygorskite (PAL) was prepared via a one-pot solvothermal method. Second, In 2 O 3 /Co 3 O 4 @PAL composites were obtained by pyrolysis of In 2 O 3 /Co 3 O 4 @PAL in air. It was found that the In 2 O 3 /Co 3 O 4 @PAL composite exhibited higher photocatalytic activities than In 2 O 3 /Co 3 O 4 to the degradation of MB and TC under visible-light irradiation. About 99% of MB (within 40 min) and 80% of TC (within 120 min) were degraded using In 2 O 3 /Co 3 O 4 @5.0%PAL as catalyst. It was supposed that the efficient adsorption of MB and TC, and electrostatic interactions between electron–hole and PAL were responsible for such improvement. The photocatalytic degradation mechanisms of MB and TC on the In 2 O 3 /Co 3 O 4 @PAL were investigated. This work shows that hybridization MOFs with PAL could enhance the photocatalytic properties of MOFs-derived metal oxides for water treatment.
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高影响因子
Surfaces and Interfaces
·
2026
·
IF 6
Mengfei Hu,Zhaodong Pan,Xin Zhou,Rui Wang,Jun Jin,Huanwen Wang,Yansheng Gong
Fe ions were incorporated into octahedral sites of palygorskite to achieve lattice reconstruction via a facile hydrothermal route. • A dual Z-scheme heterojunction was constructed in Bi 2 WO 6 /Fe-substituted palygorskite composites for efficient charge separation. • In-situ formed Fe 2 O 3 nanoparticles enhanced visible-light absorption and provided abundant active sites for CO 2 adsorption and activation. • The optimized photocatalyst showed a CO generation rate of 831.26 μmol g −1 h −1 with high selectivity up to 74.82% toward CO. The rational utilization of natural nano-minerals toward high-performance photocatalysts is highly desirable yet challenging. In this work, Fe ions were introduced into the octahedral sites of acid-activated palygorskite (Pal) to realize lattice reconstruction via a thermostatic oil bath-assisted hydrothermal strategy. Bi 2 WO 6 /Fe-substituted Pal (BWO/Fe-Pal) composites were then fabricated by hydrothermal deposition of Bi 2 WO 6 nanosheets on Fe-Pal supports. Fe substitution preserved the basic crystalline structure of Pal while effectively narrowing its band gap. When the Fe mass ratio exceeded 20 wt%, Fe 2 O 3 nanoparticles were in-situ precipitated on Pal surfaces, which strengthened visible-light absorption and provided abundant active sites for synergistic adsorption and photoactivation of CO 2 . The optimized 30FPB-0.3 photocatalyst exhibited a CO generation rate of 831.26 μmol g −1 h −1 , approximately 26.12 times higher than that of pure Bi 2 WO 6 (31.82 μmol g −1 h −1 ). Meanwhile, CO selectivity was significantly improved from 17.6% to 74.82%. Systematic characterizations demonstrated that Fe doping and in-situ formed Fe 2 O 3 modulated the band structure of Pal and increased surface-active sites. Moreover, the hybridization with Bi 2 WO 6 induced the formation of a dual Z-scheme heterojunction, which broadened the photoresponse range and greatly promoted the separation and migration of photogenerated charge carriers. This study provides a green, low-cost, and feasible route for designing efficient mineral-based photocatalysts toward photocatalytic CO 2 reduction. Download: Download high-res image (374KB) Download: Download full-size image
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高影响因子
CERAMICS INTERNATIONAL
·
2023
·
IF 5.2
Yunhang Liu,Qian Wang,Gan Zhu,Qiwen Ran,Fang Li,Meimei Guo,Guifang Wang,Hongyuan Zhao
We reported an one-pot ultrasonic-assisted method for the preparation of palygorskite nanorods/Super P Li carbon nanoparticles-graphitized carbon nanotubes (PNRs/SPCNPs-g-CNTs) nanocomposite, which was used to modify the glassy carbon electrode (GCE) for the fabrication of PNRs/SPCNPs-g-CNTs/GCE sensor. For the PNRs/SPCNPs-g-CNTs nanocomposite, PNRs with good stability presented large specific surface area and high adsorption, which promoted the enrichment of NA molecules on the electrode surface. SPCNPs with pearl chain-like nanostructure exhibited good electrical conductivity , and the combination of SPCNPs and g-CNTs with high graphitization degree formed an interconnected carbon conductive network with excellent electrical conductivity, which enhanced the charge transport efficiency. Moreover, the interconnected carbon conductive network of SPCNPs-g-CNTs not only promoted the dispersion degree of PNRs but also made up for the poor conductivity property of PNRs. When used for the detection of niclosamide (NA), an acceptable limit of detection (3.6 nM) was achieved at the PNRs/SPCNPs-g-CNTs/GCE sensor in linear NA concentration range of 0.01–10 μM. The PNRs/SPCNPs-g-CNTs/GCE sensor exhibited good reproducibility, repeatability, and anti-interference performance. For the practicability measurement, the fabricated sensor showed good practicability with satisfactory recoveries (97.0–102.7%) and low RSD values of 0.99–4.78% for the detection of NA in tap water and lake water samples.
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高影响因子
CHEMICAL ENGINEERING JOURNAL
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2022
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IF 16.744
Yabin Li,Jingyao Qi,Jimin Shen,Pengwei Yan,Jing Kang,Binyuan Wang,Shuyu Wang,Jinxiang Zuo,Zhonglin Chen
Peroxymonosulfate (PMS)-based advanced oxidation processes are perceived as a novel strategy for water purification. However, designing an efficient catalyst with a low metal leaching rate remains challenging. Here, under palygorskite (PAL) mediation, 16%-CoCu 0.4 Fe 1.6 O 4 @PAL (16%-CCFO@PAL) was constructed, exhibiting ample oxygen vacancies (V O ) and low metal leakage. The V O was confirmed by systematic characterizations and theoretical calculations. The catalyst showed the efficient catalytic capacity for PMS by dual-path (i.e., metal sites and V O ) activation. Large amounts of SO 4 •- , •OH, and 1 O 2 were produced, greatly destroying bisphenol S (BPS). BPS removal was greater than 99% within 25 min in the 16%-CCFO@PAL/PMS system. At the metal sites, PMS was activated under the synergistic effects of Co(II)/Co(III), Fe(II)/Fe(III), and Cu(I)/Cu(II) pairs and electron transfer. In addition to metal sites, the V O was also an activation center for PMS, which mainly captured the O I atom in [H-O I -O II -SO 3 ] - , donating an electron to O I and promoting SO 4 •- generation. The interfacial reaction mechanism was explored by in situ tests, and a dual-path activation mechanism was proposed. This work provides a new perspective for V O -assisted PMS activation for water treatment.
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高影响因子
CHINESE JOURNAL OF CHEMICAL ENGINEERING
·
2020
·
IF 2.627
Zhaoru Fan,Shouyong Zhou,Ailian Xue,Meisheng Li,Yan Zhang,Yijiang Zhao,Weihong Xing
A low-cost porous ceramic support was prepared from low-grade palygorskite clay (LPGS) and silicon carbide (SiC) with vanadium pentoxide (V 2 O 5 ) additives by a dry-press forming method and sintering. The effects of SiC–LPGS ratio, pressing pressure, carbon powder pore-forming agent and V 2 O 5 sintering additives on the microstructure and performance of the supports were investigated. The addition of an appropriate amount of SiC to the LPGS can prevent excessive shrinkage of the support during sintering, and increase the mechanical strength and open porosity of the supports. The presence of SiC (34.4%) led to increases in the open porosity and mechanical strength of 40.43% ± 0.21% and (17.76 ± 0.51) MPa, respectively, after sintering at 700 °C for 3 h. Because of its low melting point, V 2 O 5 can melt to liquid during sintering, which increases the mechanical strength of the supports and retains the porosity. Certainly, this can also encourage efficient use of the LPGS and avoid wasting resources.
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高影响因子
Journal of Water Process Engineering
·
2026
·
IF 6.6
Ye Li,Jia-Hang Liu,Bai-Hang Zhao,Xu-Ming Liu,Rui-Xuan Liu
CoLaO x @PAL was successfully prepared and had a high effect to activate PMS for NOR removal. • NOR degradation process included free radical pathway ( SO 4 ∙ − and ∙ OH ) and non-free radical pathway ( O 2 1 ). • La doping caused oxygen vacancies generation, accelerating the electron transfer during NOR degradation process. • CoLaO x @PAL had a good environmental friendliness and practical applicability for NOR removal. Appropriate catalyst support can effectively alleviate the agglomeration of metal components, and reduce the leaching of metal ions. In this manuscript, CoLaO x was loaded on palygorskite (PAL) to prepare CoLaO x @PAL for norfloxacin (NOR) efficiently removal through persulfate (PMS) activation. Under the optimal experimental conditions (CoLaO x @PAL: 0.5 g/L, PMS dosage: 0.6 mM, pH: 7.7), the removal efficiency and pseudo-first-order rate constant ( k obs ) of NOR reached 91% and 0.11 min −1 , respectively. The morphology and structure of CoLaO x @PAL were characterized by SEM, XRD and FTIR, which strongly proved that CoLaO x was successfully loaded on the surface of PAL. Quenching experiment and EPR verified the dominant position of O 2 1 in NOR degradation by CoLaO x @PAL activating PMS. XPS and electrochemical characterization verified that a redox reaction between Co 2+ /Co 3+ promoted the formation of SO 4 ∙ − and ∙ OH radicals, and La doping introduced oxygen vacancies. These effectively promoted electron transfer, and thus improved the catalytic activity of CoLaO x @PAL. Three possible NOR degradation pathways were proposed through LC-MS analysis. A NOR removal efficiency of over 80% was maintained both after five consecutive cycling experiments and in various real water matrices, which verified the promising practical application potential of CoLaO x @PAL. Finally, the ECOSAR prediction results showed that most of the intermediates were harmless to the environment and had certain environmental stability. The preparation of CoLaO x @PAL broadens the application of rare earth elements, and provides some new insights into naturally occurring mineral-based catalysts for antibiotic wastewater treatment. Download: Download high-res image (240KB) Download: Download full-size image
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高影响因子
Membranes
·
2021
·Vol. 11
·期 11
·889
·
IF 4.106
Liu Yang,Qianwen Zhang,Qikun Wang,Wande Ding,Kefeng Zhang
Recently, palygorskite (Pal) has become a promising new membrane additive in flux enhancement and fouling reduction, which is an environmentally friendly nanoclay material under the 2:1 layer composition with 1D tubular structure. However, the aggregation of Pal due to the intermolecular forces is still an obstacle to be solved in improving membrane performance. Herein, Pal nanoparticles were chemically modified by KH550 to weaken the aggregation and improve the dispersibility, and then incorporated into the organic phase to prepare thin-film nanocomposite (TFN) membranes. The results showed that the organo-functionalization could effectively improve the membrane hydrophilicity and dispersion of Pal nanoparticles in the polyamide layer, which contributed to the enhanced water flux (from 25 to 38 L/m2·h), unchanged salt rejection (98.0%) and better antifouling capacity (91% flux recovery rate), which suggested that the organo-functionalization of nanoparticles was an efficient method in further enhancing membrane performanceKeywords:reverse osmosis;palygorskite nanoparticles;organo-functionalization;desalination;antifouling
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高影响因子
RSC Advances
·
2022
·Vol. 12
·期 12
·7328-7334
·
IF 4.036
Minzhi Zhao,Zhonghua Tang,Jia Zhang,Guorui Fu,Weibing Xu,Qingfeng Wu,Lumei Pu
Herein, gadolinium tannate was simply and conveniently coated on the surface of palygorskite by in situ reaction of a coordination polymer formed between tannic acid and Gd3+. The palygorskite–tannate gadolinium–polyvinyl alcohol integrated composite (PAL@Gd@PVA) is successfully prepared after the introduction of polyvinyl alcohol onto the palygorskite–tannate gadolinium. The structure is characterized by Fourier transform infrared spectroscopy, thermogravimetric analysis, X-ray diffraction spectroscopy, X-ray photoelectron spectroscopy, and transmission electron microscopy analysis. The results show that TA-Gd and PVA are successfully loaded on the surface of palygorskite, and the rod crystal structure of palygorskite in the composite remains intact. Palygorskite fibres constitute the framework of the composite and play a key role in supporting and crosslinking the composite. The prepared compounds showed negligible cytotoxicity and low haemolysis rate, showing good biocompatibility. In vitro MRI results showed that the longitudinal and transverse relaxation rates of the composite are 59.56 and 340.81 mm−1 s−1, respectively.
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高影响因子
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