LANGMUIR
·
2025
·
IF 3.9
Zhiying Nan,Hui Xu,Yanhua Liu,Yanan Jiao,Wenhao Li,Jianbin Zhang,Dianming Li,Libang Feng
Janus nanosheets have garnered significant attention in nanoscience due to their distinctive asymmetric structures and versatile applications. Traditional synthesis methods are often time-consuming and complex, emphasizing the urgent need for a simplified and environmentally sustainable synthesis method. Herein, a reactive template method was employed to fabricate amphiphilic alkyl-polytannin-Al3+ (alkyl-PTA-Al (III)) Janus nanosheets. This was achieved using self-assembling octadecylamine (ODA) bilayers as reactive templates. Due to the flexibility and multiple reactive groups of polytannins (PTA), alkyl-PTA-Al (III) Janus nanosheets were utilized as trapping agents for capturing polystyrene (PS) nanoplastics first in water, achieving a removal efficiency of 89.07%. By exploiting the singular anisotropic wettability of alkyl-PTA-Al (III) Janus nanosheets, they can self-assemble at oil–water interfaces, reducing interfacial tension and acting as promising solid surface emulsifiers capable of stabilizing emulsions for up to 180 days. Additionally, the surface functionalization of alkyl-PTA-Al (III) Janus nanosheets with Ag nanoparticles through in situ reduction effect of tannins enabled the catalytic reduction of p-nitrophenol at the emulsion interface, achieving a 99.30% conversion within only 8 min. This work presents a straightforward self-assembly method for creating amphiphilic alkyl-polyphenol Janus nanosheets, highlighting their potential environmental applications in nanoplastics capture, interfacial emulsification and catalysis.
研究领域:
环境科学
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纳米技术
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材料科学
·
化学工程
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胶体与界面科学
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DOI
PubMed
高影响因子
RSC Advances
·
2016
·Vol. 6
·期 115
·114171-114182
·
IF 3.289
Yanfang Huang,Wencui Chai,Guihong Han,Jiongtian Liu,Hongyang Wu,Shengpeng Su,Yijun Cao
The acid/base chemistry of hydrolysable Al(III) species with a clay (bentonite and kaolin) system was investigated at 35 °C in the expanded solution pH range from 1 to 9. The adsorption capacity (qe) and mechanism of Al(III) species on clays were examined by means of UV-Vis spectra, optical microscope, zeta potential testing, SEM, XPS and XRD analysis. The results demonstrate that the qe of Al(III) increases with increasing solution pH, and the maximum adsorptions of bentonite and kaolin are 13.64 mg g−1 and 1.06 mg g−1, respectively. Each Al(III) species offers a different contribution to the total adsorption capacity. The cation Al3+ is the dominant species below pH 4 and the anion Al(OH)4− is the main species above pH 6. The solution pH values change in the single clay or hybrid clay/Al(III) solution because of the acid–base dissolution and competitive adsorption of H+/OH− with Al(III) species. The particle sizes (d80) of the clays after adsorption at different pH were first associated with thermodynamics. The zeta potential variation of clays was first connected with the total charge numbers of Al(III) species in solution. Zeta potential, XPS and XRD studies indicate that charge neutralization and ion exchange dominate the adsorption process at lower pH and surface complexation and precipitation at higher pH.
研究领域:
环境科学
·
化学
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DOI
高影响因子
Reaction Chemistry & Engineering
·
2022
·Vol. 7
·期 11
·2313-2321
·
IF 5.2
Hong-Qing Fu,Haifang Mao,Chaoyang Wang,Kun Yin,Miaomiao Jin,Zhenbiao Dong,Yun Zhao,Jibo Liu
Aimed at greenhouse gas CO2 high value-added utilization, a N,N′-(propane-1,3-diyl)dipicolinamide (PPPA) supported Al(III) metal–organic polydentate chelate complex (Al-PPPA) was designed and used to efficiently catalyze CO2 to cyclic carbonates. The substrate conversion and product selectivity were more than 95% and 98%, respectively, at 120 °C and 2 MPa CO2 without the presence of a co-catalyst. After 5 times of recycling, the substrate conversion was no less than 88%, which indicated the excellent thermal stability and reusability of the catalyst. Simultaneously, the catalyst showed a widely universal range of substrates including olefin chains, phenyl chains, internal epoxides and fluorine-containing epoxides. Furthermore, the plausible mechanism of the CO2 cycloaddition reaction was explored by employing in situ IR technology. The ring opening of PO, CO2 activation and the formation of the final products were examined visually. This work supplies a new route for the theoretical and experimental exploration of new catalyst design and process understanding for efficient greenhouse gas reuse.
研究领域:
化学
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环境科学
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DOI
高影响因子
JOURNAL OF CATALYSIS
·
2019
·
IF 7.723
Habib Ullah,Bibimaryam Mousavi,Hussein A. Younus,Zafar A.K. Khattak,Suleman Suleman,Muhammad T. Jan,Baoyi Yu,Somboon Chaemchuen,Francis Verpoort
Carbon dioxide , the main cause of environmental pollution, its utilization to produce valuable products is of utmost interest. A series ONO pincer hydrazone based most active mono-nuclear Al(III) complexes were successfully synthesized and characterized with the help of NMR, IR, mass spectrometry and only complex 2a was confirmed by single-crystal analysis. The synthesized Al(III) complexes were then employed as capable catalysts for the solvent-free chemical fixation of CO 2 with epoxides at atmospheric pressure and could be reused five times without loss of any catalytic activity. In addition, the catalytic mechanism was investigated by analyzing intermediates via 1 H NMR, 13 C NMR, and mass MALDI-TOF. The excellent catalytic performance could be due to simultaneous attack and the opening of the epoxide by metal centers to form an alkoxide ion which activates the CO 2 the same time.
研究领域:
化学
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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
APPLIED ORGANOMETALLIC CHEMISTRY
·
2024
·
IF 3.7
Huang Pei-Pei,Wu Ting-Ting,Tuo Meng-Qi,Zhang Rui-Ying,Shuai Chun-Jiang,Liu Bo,Song Juan,Zhang Sheng-Rui,Lu Jiu-Fu
In the field of water decontamination, the design of luminance sensor for sensitive detection of heavy metal ion toxic and nitroaromatic compounds are important and challenging. Herein, a new luminescent Cd(II) metal–organic framework (MOF), {[Cd 2 (H 2 O) 3 (4-CPCA) 2 ]·2H 2 O} n ( SNUT-27 ) (H 2 (4-CPCA) = 1-(4-carboxyphenyl)-4-oxo-1,4-dihydropyridazine-3-carboxylic acid) was obtained by the reaction of flexible ligand H 2 (4-CPCA) and Cd(II) ions, characterized by single crystal X-ray diffraction, PXRD, FT-IR, and TGA, the samples were further analyzed. The analysis of single crystal X-ray diffraction showed that SNUT-27 possesses a distinct three-dimensional spatial arrangement and demonstrates impressive fluorescence properties. Particularly, SNUT-27 showed a highly sensitive response to the nitro-aromatic compounds nitrobenzene by fluorescence quenching, and in contrast, showed a fluorescence enhancement response to Al 3+ and Cu 2+ . SNUT-27 can be effortlessly recycled by simply rinsing with water post-sensing experiments, showcasing its reusability. Additionally, potential detection mechanisms have been explored.
研究领域:
材料科学
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环境科学
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DOI
高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2025
·
IF 8.5
Weiquan Yuan,Jingzhong Kuang,Dan Ding,Zheyu Huang
Herein, organic/inorganic multiple adsorption sites were constructed on halloysite to intensify the selective adsorption performance of the adsorbent for Al(III) in rare earth solutions. The adsorption heat behavior and thermodynamics of the composite for different ion systems were investigated using microcalorimetry. The results showed that chitosan formed a mesoporous membrane on the acid-treated calcined halloysite (Hal H) substrate through a strong electron interaction between the nitrogen atom of the amino group and the oxygen atom of Si O structure on Hal H. Wurtzite was loaded onto the chitosan mesoporous membrane as nanoparticles and partially oxidized to the ZnO phase of wurtzite. [email protected] demonstrated excellent adsorption capacity ( q max (Al 3+ ) was 102.04 mg/g), selectivity performance (Ks was 1583.06), adaptation to varying ion concentrations and structural stability in the mixed solution. Solution pH, ion concentration and temperature significantly affected the adsorption heat behavior and thermodynamics of the composite in different ion systems. The efficient selective adsorption of Al(III) by [email protected] was achieved through chelation with the amide and amino groups of chitosan and chemical interaction with sulfur groups of wurtzite. This work exemplifies a promising strategy for designing novel mineral materials with strong selective adsorption properties for the separation of Al(III) and rare earth ions.
研究领域:
材料科学
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环境化学
·
吸附科学
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热力学
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矿物加工
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产品关联
DOI
PubMed
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2022
·
IF 9.136
Weiquan Yuan,Jingzhong Kuang,Mingming Yu,Zheyu Huang,Xiaoyuan Wang,Junjie Xiao,Shaoyan Zhang,Hao Cheng,Yiqiang Yang
Removal of aluminum ion from rare earth ions solution by selective adsorption was one of the promising methods for green enrichment of the acidic rare earth solution containing aluminum ions. Herein, a series of ZnS polymorphs/halloysite composites and Wurtzite/Halloysite (WZ@Hal) with different wurtzite content were prepared by facile one-step hydrothermal method using halloysite as the substance. The phase composition, microstructure and specific surface area of the WZ@Hal composite were characterized and the selective adsorption behavior of the WZ@Hal composite for aluminum and rare earth ions under different conditions was studied. The results showed that WZ@Hal composite loaded with hexagonal wurtzite showed good adsorption selectivity for Al(III) with a spontaneous exothermic process, while SP@Hal composite loaded with cubic sphalerite displayed no obvious adsorption capacity for both Al(III) and Er(III) with an endothermic process. The WZ@Hal composite was synthesized through strong electron interaction between sulfur atoms of wurtzite with oxygen atoms on the surface of halloysite. The WZ@Hal exhibited a fast adsorption rate a fast adsorption rate (k 2 was 0.0713 g⋅mg −1 ⋅min −1 ) and an excellent selectivity coefficient (K s was 237). The adsorption process of WZ@Hal for Al(III) in mixed solution was described by the pseudo-second-order kinetic model and controlled by the chemisorption. WZ@Hal showed excellent regeneration and maintained high selective adsorption performance in adsorption–desorption process. The adsorption mechanism was that aluminum ions were adsorbed by electron interaction with sulfur atoms of wurtzite and oxygen atoms of halloysite at the interface of the wurtzite and halloysite. WZ@Hal composite showed excellent selective adsorption performance in the adsorption and separation process of acidic mixed solution of aluminum ion and rare earth ions.
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高影响因子
SCIENCE OF THE TOTAL ENVIRONMENT
·
2021
·
IF 7.963
Lin Zhang,Fenglian Fu,Guangda Yu,Guangzhao Sun,Bing Tang
Ferrihydrite-humic acid co-precipitates have impacts on the adsorption and reduction of Cr(VI) in the natural environment. Besides, ferrihydrite-humic acid co-precipitates usually coexist with foreign metal cations like Al(III) and Mn(II), which may change the properties of ferrihydrite and affect the fate of Cr(VI). In this work, structurally incorporated Al(III) or Mn(II) in ferrihydrite-humic acid co-precipitates with Cr(VI) (Fh-HA-Cr-Al or Fh-HA-Cr-Mn) were prepared, and the behavior and phase transformation of co-precipitates were explored via the characterization analyses of samples during aging for 10 days. This study showed that partial adsorbed Cr(VI) was reduced to Cr(III) in the presence of humic acid , thereby reducing the toxicity of Cr(VI). Interestingly, two different results occurred because of the incorporation of Al(III) and Mn(II). Al(III) hindered the transformation of ferrihydrite and changed the aging products by inhibiting the dissolution of ferrihydrite, which decreased Cr to incorporate iron minerals. By contrast, doping of Mn(II) accelerated the phase transformation of co-precipitates, and was more conducive to the encapsulation and fixation of Cr. The results of this study can facilitate the understanding of the effects of Al(III) and Mn(II) on Cr(VI) fixation during the aging of Fh-HA-Cr.
研究领域:
环境科学
·
化学
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产品关联
DOI
PubMed
高影响因子
RESOURCES CONSERVATION AND RECYCLING
·
2025
·
IF 10.9
Fei Han,Yaohui Xie,Lin Qu,Zhenzhou Wang,Wei Zhang,Guang Yang,Huiqin Hu,Meiting Huang,Haoxuan Yu,Liming Yang,Xubiao Luo
Deep removal of trace aluminum from lithium extraction slag (LES) is key to recovering high-purity battery-grade iron phosphate (FePO 4 ). Existing methods exhibit low aluminum removal due to the close solubility product constants of Al (III) and Fe (III). In this work, we propose a novel strategy for trace aluminum removal based on fluoride ion-mediated differential coordination of Al (III) and Fe (III). Through precise control of fluoride ion concentration in phosphoric acid solution, iron preferentially precipitates while aluminum predominantly forms soluble fluoride complexes. This distinct behavior enables precise elemental separation through fluoride content optimization. The developed separation technology achieved aluminum removal rate of 98.89 %. It is noteworthy that the aluminum content of precipitated FePO 4 is below 30 ppm, which meets the standard of battery-grade. This work provides a viable technical pathway for the industrialization of Al/Fe separation in the lithium extraction slag leachate and the regeneration of low-Al, high-purity FePO 4 .
研究领域:
化学工程
·
材料科学
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产品关联
DOI
高影响因子
JOURNAL OF RARE EARTHS
·
2022
·
IF 4.632
Guoqing Yu,Lin Zhou,Fengqin Liu,Siming Pang,Dehong Chen,Hongliang Zhao,Zhengping Zuo
In this study, a molten salt co-reduction method was proposed for preparing Y–Al intermediate alloys and the electrochemical co-reduction behaviors of Y(III) and Al(III) and the reaction mechanism of intermetallic compound formation were investigated by transient electrochemical techniques . The results show that the reduction of Y(III) at the Mo electrode is a reversible electrochemical process with a single-step transfer of three electrons, which is controlled by the mass transfer rate. The diffusion coefficient of Y(III) in the fluoride salt at a temperature of 1323 K is 5.0238 × 10 −3 cm 2 /s. Moreover, the thermodynamic properties associated with the formation of Y–Al intermetallic compounds were estimated using a steady-state electrochemical method. Y–Al intermediate alloy containing 92 wt% yttrium was prepared by constant current electrolysis at 1323 K in the LiF–YF 3 –AlF 3 –Y 2 O 3 (6 wt%)–Al 2 O 3 (1 wt%) system at a cathodic current density of 8 A/cm 2 for 2 h. The Y–Al intermediate alloy is mainly composed of α-Y 2 Al and Y phases. The development and application of this innovative technology have solved major technical problems, such as a long production process, high energy consumption, and serious segregation of alloy elements at this stage.
研究领域:
材料科学
·
电化学
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DOI
高影响因子
MICROCHIMICA ACTA
·
2014
·Vol. 182
·期 1
·297-306
·
IF 3.719
Liang Wanjun,Liu Zhengqing,Li Dan,Wu Xiaoping,Liu Shaopu,He Youqiu
We describe a novel fluorescent bioprobe for the sensitive and selective detection of double-stranded DNA (dsDNA). It consists of quantum dots (Q-dots) whose fluorescence is quenched (through photoinduced electron transfer) on covering them with the Al(III)-pefloxacin complex. It is found, however, that dsDNA has an affinity for this complex that is so strong that it can break up the binding to the quantum dots, this leading to a complete recovery of the fluorescence of both the Q-dots and the Al(III)-pefloxacin complex. Dual fluorescence (peaking at 420 and 547 nm) is observed under a single excitation wavelength of 350 nm. Neither ribonucleic acid, bovine serum albumin, nor biologically relevant metal ions are capable of giving this effect. The detection limit (3σ/k) for herring sperm DNA is 15.3 μg L −1 if determined via the fluorescence of the Q-dots, and 48 μg L −1 via the Al(III)-pefloxacin complex. The method was applied to the determination of hsDNA in synthetic samples and gave excellent results.
Al 3+ -pefloxacin mesylate (QDs-Al 3+ -PFLX) complex acts as an excellent quencher of the fluorescence of QDs, which was attributed to the photoinduced electron transfer from QDs to Al 3+ -PFLX complex. Due to the strong and specific binding of double-stranded DNA with Al 3+ -PFLX complex, the fluorescence intensity of QDs-Al 3+ -PFLX dyads system is restored
研究领域:
生物化学
·
分子生物学
·
分析化学
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DOI
高影响因子
Nanoscale
·
2017
·Vol. 9
·期 44
·17334-17341
·
IF 7.367
Peng Hou,Tong Yang,Hui Liu,Yuan Fang Li,Cheng Zhi Huang
Functional engineering is a crucial prerequisite for specific and wide applications of optical probes. In this study, we proposed a facile active structure preservation (ASP) method to directly develop new self-functional graphitic carbon dots (g-CDs) through a hydrothermal synthesis route by taking ciprofloxacin hydrochloride, an antibiotic belonging to a group of fluoroquinolone drugs, as an example. To retain the functional structures of the starting materials, the reaction temperature is intentionally controlled below the decomposition temperature of the reactants that hold the functional groups. As a proof of concept, we successfully prepared g-CDs with ciprofloxacin-like structures on its surface, as identified by mass spectrometric (MS) analysis. The as-prepared g-CDs not only exhibit effective antibacterial activity towards the bacteria Staphylococcus aureus (Gram-positive) and Escherichia coli (Gram-negative), but can also optically sense pH in the range from 5.02 to 9.91. Furthermore, the g-CDs can coordinate with aluminum ions to show a chelation-enhanced photoluminescence (CHEP) effect. These results indicate that the ASP method can be promising for engineering CDs with various properties.
研究领域:
材料科学
·
纳米技术
·
分析化学
·
生物医学工程
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DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）