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Nano Environmental Materials II
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Nano Environmental Materials II

A special issue of Molecules (ISSN 1420-3049). This special issue belongs to the section "Applied Chemistry".

Deadline for manuscript submissions: 31 October 2024 | Viewed by 6235

Special Issue Editors

Prof. Dr. Shaojun Yuan

E-Mail Website
Guest Editor
Low-Carbon Technology & Chemical Reaction Engineering Lab, College of Chemical Engineering, Sichuan University, Chengdu 610065, China
Interests: nano environmental materials; adsorption; CO2 capture; supercapacitor; supwetting surfaces for oil/water separation
Special Issues, Collections and Topics in MDPI journals
Dr. Ying Liang

E-Mail Website
Guest Editor
College of Architecture and Environment, Sichuan University, Chengdu 610065, China
Interests: superwetting membrane; antibacterial membrane; stimuli-responsive membrane
Special Issues, Collections and Topics in MDPI journals
Dr. Changkun Liu

E-Mail Website
Guest Editor
College of Chemistry and Environmental Engineering, Shenzhen University, Shenzhen 518061, China
Interests: membranes; adsorption; water treatment
Special Issues, Collections and Topics in MDPI journals
Dr. Xiaoying Liu

E-Mail Website
Guest Editor
College of Environment and Resources, Chongqing Technology and Business University, Chongqing 400067, China
Interests: supercapacitor; self-assembled nanostructures
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

Environmental pollution is a global risk and its magnitude is increasing day-by-day due to urbanization, heavy industrialization, and the changing lifestyles of people. In view of this, providing clean air and water and a clean environment for people is a challenging task. The advent of nanotechnology has given immense scope and opportunities for the fabrication of desired nanomaterials with large surface-to-volume ratios (and hence excellent chemical reactivities) and unique functionalities to treat pollutants. The nanomaterials play major roles in environmental remediation and are used for purposes such as the treatment of natural waters, soils, sediments, industrial and domestic waste water, mine tailings, and the polluted atmosphere. Despite the excellent progress in all types of nano-environmental materials for environmental remediation, significant challenges still remain to be addressed. Nano-environmental materials have played, and will undoubtedly continue to play, critical roles in the future developments of environmental remediation technologies.

The aim of this Special Issue is to collect state-of-the-art works on nano-environmental materials, particularly on the application of nanostructured materials and nanoscale materials for a wide range of environmental applications. In addition to original research papers, comprehensive review articles are most welcome. It is our great pleasure to invite you to submit contributions to this Special Issue.

Prof. Dr. Shaojun Yuan
Dr. Ying Liang
Dr. Changkun Liu
Dr. Xiaoying Liu
Guest Editors

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Molecules is an international peer-reviewed open access semimonthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2700 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • nanosorbents
  • nanocatalysts
  • photocatalytic nanomaterials
  • MOFs-based environmental materials
  • graphene-based environmental materials
  • carbon nanotube-based environmental materials
  • 1D nano environmental materials
  • 2D nano environmental materials
  • 3D nano environmental materials
  • nanostructured environmental materials
  • nanoscale environmental materials
  • nanocomposite environmental materials
  • nanomaterial-based applications for water treatment
  • nanomaterial-based applications for air purification
  • nanomaterial-based applications for soil sustainability
  • nanomaterial-based applications for clean energy
  • sustainable nanotechnology

Published Papers (5 papers)

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Research

16 pages, 6372 KiB  
Article
Catalytic Oxidation of Benzene over Atomic Active Site AgNi/BCN Catalysts at Room Temperature
by Xin Zuo, Lisheng Zhang, Ge Gao, Changchun Xin, Bingfeng Fu, Shejiang Liu and Hui Ding
Molecules 2024, 29(7), 1463; https://doi.org/10.3390/molecules29071463 - 25 Mar 2024
Viewed by 504
Abstract
Benzene is the typical volatile organic compound (VOC) of indoor and outdoor air pollution, which harms human health and the environment. Due to the stability of their aromatic structure, the catalytic oxidation of benzene rings in an environment without an external energy input [...] Read more.
Benzene is the typical volatile organic compound (VOC) of indoor and outdoor air pollution, which harms human health and the environment. Due to the stability of their aromatic structure, the catalytic oxidation of benzene rings in an environment without an external energy input is difficult. In this study, the efficient degradation of benzene at room temperature was achieved by constructing Ag and Ni bimetallic active site catalysts (AgNi/BCN) supported on boron–carbon–nitrogen aerogel. The atomic-scale Ag and Ni are uniformly dispersed on the catalyst surface and form Ag/Ni-C/N bonds with C and N, which were conducive to the catalytic oxidation of benzene at room temperature. Further catalytic reaction mechanisms indicate that benzene reacted with ·OH to produce R·, which reacted with O2 to regenerate ·OH. Under the strong oxidation of ·OH, benzene was oxidized to form alcohols, carboxylic acids, and eventually CO2 and H2O. This study not only significantly reduces the energy consumption of VOC catalytic oxidation, but also improves the safety of VOC treatment, providing new ideas for the low energy consumption and green development of VOC treatment. Full article
(This article belongs to the Special Issue Nano Environmental Materials II)
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15 pages, 8938 KiB  
Article
Recovering Phosphate from Complex Wastewater Using Macroporous Cryogel Composited Calcium Silicate Hydrate Nanoparticles
by Tarawee Taweekarn, Worawit Wongniramaikul, Pariyaporn Roop-o, Wanchitra Towanlong and Aree Choodum
Molecules 2024, 29(1), 228; https://doi.org/10.3390/molecules29010228 - 31 Dec 2023
Viewed by 1061
Abstract
Since currently used natural, nonrenewable phosphorus resources are estimated to be depleted in the next 30–200 years, phosphorus recovery from any phosphorus-rich residues has attracted great interest. In this study, phosphorus recovery from complex wastewater samples was investigated using continuous adsorption on cryogel [...] Read more.
Since currently used natural, nonrenewable phosphorus resources are estimated to be depleted in the next 30–200 years, phosphorus recovery from any phosphorus-rich residues has attracted great interest. In this study, phosphorus recovery from complex wastewater samples was investigated using continuous adsorption on cryogel column composited calcium silicate hydrate nanoparticles (CSH columns). The results showed that 99.99% of phosphate was recovered from a synthetic water sample (50 mg L−1) using a 5 cm CSH column with a 5 mL min−1 influent flow rate for 6 h while 82.82% and 97.58% of phosphate were recovered from household laundry wastewater (1.84 mg L−1) and reverse osmosis concentrate (26.46 mg L−1), respectively. The adsorption capacity decreased with an increasing flow rate but increased with increasing initial concentration and column height, and the obtained experimental data were better fitted to the Yoon–Nelson model (R2 = 0.7723–0.9643) than to the Adams–Bohart model (R2 = 0.6320–0.8899). The adsorption performance of phosphate was decreased 3.65 times in the presence of carbonate ions at a similar concentration, whereas no effect was obtained from nitrate and sulfate. The results demonstrate the potential of continuous-flow phosphate adsorption on the CSH column for the recovery of phosphate from complex wastewater samples. Full article
(This article belongs to the Special Issue Nano Environmental Materials II)
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15 pages, 2771 KiB  
Article
Effects of Graphene Oxide Nanosheets in Freshwater Biofilms
by Diana Matos, Salomé F. P. Almeida, Paula A. A. P. Marques, Sofia Pinto and Etelvina Figueira
Molecules 2023, 28(12), 4577; https://doi.org/10.3390/molecules28124577 - 06 Jun 2023
Viewed by 941
Abstract
Graphene oxide (GO) properties make it a promising material for graphene-based applications in areas such as biomedicine, agriculture, and the environment. Thus, its production is expected to increase, reaching hundreds of tons every year. One GO final destination is freshwater bodies, possibly affecting [...] Read more.
Graphene oxide (GO) properties make it a promising material for graphene-based applications in areas such as biomedicine, agriculture, and the environment. Thus, its production is expected to increase, reaching hundreds of tons every year. One GO final destination is freshwater bodies, possibly affecting the communities of these systems. To clarify the effect that GO may impose in freshwater communities, a fluvial biofilm scraped from submerged river stones was exposed to a range (0.1 to 20 mg/L) of GO concentrations during 96 h. With this approach, we hypothesized that GO can: (1) cause mechanical damage and morphological changes in cell biofilms; (2) interfere with the absorption of light by biofilms; (3) and generate oxidative stress, causing oxidative damage and inducing biochemical and physiological alterations. Our results showed that GO did not inflict mechanical damage. Instead, a positive effect is proposed, linked to the ability of GO to bind cations and increase the micronutrient availability to biofilms. High concentrations of GO increased photosynthetic pigment (chlorophyll a, b, and c, and carotenoids) content as a strategy to capture the available light more effectively as a response to the shading effect. A significant increase in the enzymatic (SOD and GSTs activity) and low molecular weight (lipids and carotenoids) antioxidant response was observed, that efficiently reduced oxidative stress effects, reducing the level of peroxidation, and preserving membrane integrity. Being complex entities, biofilms are more similar to environmental communities and may provide more accurate information to evaluate the impact of GO in aquatic systems. Full article
(This article belongs to the Special Issue Nano Environmental Materials II)
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14 pages, 7997 KiB  
Article
Effects of Lysine on the Interfacial Bonding of Epoxy Resin Cross-Linked Soy-Based Wood Adhesive
by Yunyi Liang, Yonghong Luo, Yang Wang, Tianyang Fei, Lili Dai, Daihui Zhang, Hongzhi Ma, Liping Cai and Changlei Xia
Molecules 2023, 28(3), 1391; https://doi.org/10.3390/molecules28031391 - 01 Feb 2023
Cited by 4 | Viewed by 1768
Abstract
Soy protein isolate (SPI) is an attractive natural material for preparing wood adhesives that has found broad application. However, poor mechanical properties and unfavorable water resistance of wood composites with SPI adhesive bonds limit its more extensive utilization. The combination of lysine (Lys) [...] Read more.
Soy protein isolate (SPI) is an attractive natural material for preparing wood adhesives that has found broad application. However, poor mechanical properties and unfavorable water resistance of wood composites with SPI adhesive bonds limit its more extensive utilization. The combination of lysine (Lys) with a small molecular structure as a curing agent for modified soy-based wood adhesive allows Lys to penetrate wood pores easily and can result in better mechanical strength of soy protein-based composites, leading to the formation of strong chemical bonds between the amino acid and wood interface. Scanning electron microscopy (SEM) results showed that the degree of penetration of the S/G/L-9% adhesive into the wood was significantly increased, the voids, such as ducts of wood at the bonding interface, were filled, and the interfacial bonding ability of the plywood was enhanced. Compared with the pure SPI adhesive, the corresponding wood breakage rate was boosted to 84%. The wet shear strength of the modified SPI adhesive was 0.64 MPa. When Lys and glycerol epoxy resin (GER) were added, the wet shear strength of plywood prepared by the S/G/L-9% adhesive reached 1.22 MPa, which increased by 29.8% compared with only GER (0.94 MPa). Furthermore, the resultant SPI adhesive displayed excellent thermostability. Water resistance of S/G/L-9% adhesive was further enhanced with respect to pure SPI and S/GER adhesives through curing with 9% Lys. In addition, this work provides a new and feasible strategy for the development and application of manufacturing low-cost, and renewable biobased adhesives with excellent mechanical properties, a promising alternative to traditional formaldehyde-free adhesives in the wood industry. Full article
(This article belongs to the Special Issue Nano Environmental Materials II)
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13 pages, 3176 KiB  
Article
Novel Hydrophobic Polyvinyl-Alcohol Formaldehyde Sponges: Synthesis, Characterization, Fast and Effective Organic Solvent Uptake from Contaminated Soil Samples
by Yajvinder Saharan, Joginder Singh, Rohit Goyat, Ahmad Umar and Sheikh Akbar
Molecules 2022, 27(23), 8429; https://doi.org/10.3390/molecules27238429 - 02 Dec 2022
Cited by 2 | Viewed by 1307
Abstract
In the present research work, PVFTX-100, PVFSDS, and PVFT-80 sponges were prepared using polyvinyl-alcohol (PVA) with surfactants triton X-100/sodium dodecyl sulfate (SDS)/Tween 80, respectively, for the removal of organic solvents from polluted soil/water samples. All three obtained sponges were further made hydrophobic using [...] Read more.
In the present research work, PVFTX-100, PVFSDS, and PVFT-80 sponges were prepared using polyvinyl-alcohol (PVA) with surfactants triton X-100/sodium dodecyl sulfate (SDS)/Tween 80, respectively, for the removal of organic solvents from polluted soil/water samples. All three obtained sponges were further made hydrophobic using dodecyltrimethoxysilane (DTMS). The prepared sponges were characterized using different spectroscopic techniques and SEM analysis. The peaks obtained near 1050 cm−1 and 790 cm−1 were attributed to Si-O-C and alkyl side chain C-H stretching vibration that confirmed the formation of desired sponges. The SEM images showed the random roughness with a number of protrusions on sponge surfaces, which further played an important role in the absorption and retention of organic solvents molecules. The Sears method was chosen to calculate the surface area and pore volume of all the synthesized sponge samples. Among all three prepared sponges, the PVFTX-100 sponge showed a high pore volume and large surface area, with a maximum percentage absorption capacity of 96%, 91%, 89.9%, 85.6%, and 80 for chlorobenzene, toluene, diesel, petrol, and hexane, respectively, after eightcycles. The organic solvent uptake using PVFTX-100, PVFSDS, and PVFT-80 sponges is quite a unique and simple technology, which could be employed at a large scale for contaminated soil/water systems. Full article
(This article belongs to the Special Issue Nano Environmental Materials II)
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