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Preparation of Micro/Nano Adsorption Materials and Their Separation and Purification...
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Preparation of Micro/Nano Adsorption Materials and Their Separation and Purification Applications

A special issue of Nanomaterials (ISSN 2079-4991). This special issue belongs to the section "Nanocomposite Materials".

Deadline for manuscript submissions: closed (25 October 2022) | Viewed by 6133

Special Issue Editor

Prof. Dr. Jianming Pan

E-Mail Website
Guest Editor
School of Chemistry and Chemical Engineering, Jiangsu University, Zhenjiang 212013, China
Interests: molecular imprinting and smart materials; molecular identification separation; construction of droplet reactor
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

Over recent decades, the development of effective separation and purification technology has attracted increasing attention. Adsorption is considered to be one of the most attractive methods because of its high efficiency, simple operation, good reversibility, low cost, environment-friendly. The adsorption material, also known as adsorbent, is the most important factor in the adsorption process. Even though, a large number of adsorption materials have been developed, the development of new adsorption materials with high efficiency, high selectivity and intelligence is still an important challenge in the future. This Special Issue, titled: “Preparation of Micro/Nano Adsorption Materials and Their Separation and Purification applications”, within the Nanomaterials Journal of MDPI, aims to publish original research in new findings on micro/nano adsorption materials for separation and purification applications and also to underline their impact on emerging nanotechnologies. Full papers, communications, and reviews are all welcome. We look forward to receiving your work. We will work hard towards the rapid and wide dissemination of your valuable research results, recent developments, and novel applications in the area of the materials, separation and purification, chemical engineering and environment.

Prof. Dr. Jianming Pan
Guest Editor

Manuscript Submission Information

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Keywords

  • Micro/Nano Materials
  • Adsorption
  • Separation
  • Purification
  • Environment

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Published Papers (4 papers)

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Research

14 pages, 2764 KiB  
Article
Study on Preparation of Chitosan/Polyvinyl Alcohol Aerogel with Graphene−Intercalated Attapulgite(GO−ATP@CS−PVA) and Adsorption Properties of Crystal Violet Dye
by Weikai Sun, Hongxiang Ou and Ziwei Chen
Nanomaterials 2022, 12(22), 3931; https://doi.org/10.3390/nano12223931 - 8 Nov 2022
Cited by 14 | Viewed by 2275
Abstract
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 [...] Read more.
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. Full article
(This article belongs to the Special Issue Preparation of Micro/Nano Adsorption Materials and Their Separation and Purification Applications)
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15 pages, 9901 KiB  
Article
Interfacial Imide Polymerization of Functionalized Filled Microcapsule Templates by the Pickering Emulsion Method for the Rapid Removal of 3,4,5-Trichlorophenol from Wastewater
by Zhuangxin Wei, Xinmin Ma, Pan Wang and Jianming Pan
Nanomaterials 2022, 12(19), 3439; https://doi.org/10.3390/nano12193439 - 1 Oct 2022
Viewed by 1490
Abstract
In this work, an olive oil-filled composite capsule (C–O/W) adsorbent was prepared for the adsorption of 3,4,5-trichlorophenol (3,4,5-TCP) by the emulsion templating method. Using methylene diisocyanate (HDI) and 1,6-hexanediamine (HMDA) as functional monomers, olive oil was encapsulated in a shell layer composed of [...] Read more.
In this work, an olive oil-filled composite capsule (C–O/W) adsorbent was prepared for the adsorption of 3,4,5-trichlorophenol (3,4,5-TCP) by the emulsion templating method. Using methylene diisocyanate (HDI) and 1,6-hexanediamine (HMDA) as functional monomers, olive oil was encapsulated in a shell layer composed of graphene oxide and a polymer by interfacial imine polymerization. The contaminant target was efficiently removed by the hydrophobic interaction between olive oil and chlorophenols. The removal of 3,4,5-TCP was remarkable, with an encapsulation rate of 85%. The unique microcapsule structure further enhanced the kinetic performance, which reached 92% of the maximum value within 40 min. The adsorption of different chlorophenols was investigated using 2-chlorophenol (2-CP), 2,6-dichlorophenol (2,6-DCP), and 3,4,5-TCP. The adsorption of 3,4,5-TCP by the C-O/W microcapsules was found to be much higher than that of other chlorophenols. When analyzing a real sample, the content of 3,4,5-TCP was significantly reduced after adsorption by the C-O/W microcapsules, demonstrating that the C-O/W microcapsules were also capable of removing 3,4,5-TCP from a complex environment. This simple and inexpensive preparation strategy provides a new method for the synthesis of functionalized C-O/W microcapsule adsorbents and an effective adsorbent of 3,4,5-TCP. Full article
(This article belongs to the Special Issue Preparation of Micro/Nano Adsorption Materials and Their Separation and Purification Applications)
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12 pages, 2686 KiB  
Article
The Efficient and Convenient Extracting Uranium from Water by a Uranyl-Ion Affine Microgel Container
by Peiyan He, Minghao Shen, Wanli Xie, Yue Ma and Jianming Pan
Nanomaterials 2022, 12(13), 2259; https://doi.org/10.3390/nano12132259 - 30 Jun 2022
Cited by 1 | Viewed by 1475
Abstract
Uranium is an indispensable part of the nuclear industry that benefits us, but its consequent pollution of water bodies also makes a far-reaching impact on human society. The rapid, efficient and convenient extraction of uranium from water is to be a top priority. [...] Read more.
Uranium is an indispensable part of the nuclear industry that benefits us, but its consequent pollution of water bodies also makes a far-reaching impact on human society. The rapid, efficient and convenient extraction of uranium from water is to be a top priority. Thanks to the super hydrophilic and fast adsorption rate of microgel, it has been the ideal adsorbent in water; however, it was too difficult to recover the microgel after adsorption, which limited its practical applications. Here, we developed a uranyl-ion affine and recyclable microgel container that has not only the rapid swelling rate of microgel particles but also allows the detection of the adsorption saturation process by the naked eye. Full article
(This article belongs to the Special Issue Preparation of Micro/Nano Adsorption Materials and Their Separation and Purification Applications)
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14 pages, 4247 KiB  
Article
Crown Ether Grafted Graphene Oxide/Chitosan/Polyvinyl Alcohol Nanofiber Membrane for Highly Selective Adsorption and Separation of Lithium Ion
by Xudong Zheng, Ang Li, Jie Hua, Yuzhe Zhang and Zhongyu Li
Nanomaterials 2021, 11(10), 2668; https://doi.org/10.3390/nano11102668 - 11 Oct 2021
Cited by 17 | Viewed by 3456
Abstract
Nanofiber membranes were successfully prepared with crown ether (CE) functionalized graphene oxide (GO), chitosan (CS), and polyvinyl alcohol (PVA) by low-temperature thermally induced liquid–liquid phase separation. The physical and chemical properties and adsorption performance of nanofiber membrane were studied through SEM, FT-IR, XRD, [...] Read more.
Nanofiber membranes were successfully prepared with crown ether (CE) functionalized graphene oxide (GO), chitosan (CS), and polyvinyl alcohol (PVA) by low-temperature thermally induced liquid–liquid phase separation. The physical and chemical properties and adsorption performance of nanofiber membrane were studied through SEM, FT-IR, XRD, and static adsorption experiments. The results show that the specific surface area of the nanofiber membrane is as high as 101.5 m2∙g−1. The results of static adsorption experiments show that the maximum adsorption capacity of the nanofiber membrane can reach 168.50 mg∙g−1 when the pH is 7.0. In the selective adsorption experiment, the nanofiber membrane showed high selectivity for Li+ in salt lake brine. After five cycles, the material still retains 88.31% of the adsorption capacity. Therefore, it is proved that the material has good regeneration ability. Full article
(This article belongs to the Special Issue Preparation of Micro/Nano Adsorption Materials and Their Separation and Purification Applications)
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