1
|
Amine-functionalized magnetic microspheres from lignosulfonate for industrial wastewater purification. Int J Biol Macromol 2022; 224:133-142. [DOI: 10.1016/j.ijbiomac.2022.10.110] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2022] [Revised: 10/07/2022] [Accepted: 10/12/2022] [Indexed: 11/05/2022]
|
2
|
Dong Y, Wang S, Choi HJ. Poly(N-methylaniline)/magnetite microsphere and its electrical and magnetic dual responses. POLYMER 2022. [DOI: 10.1016/j.polymer.2021.124492] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
|
3
|
Mažeikienė R, Niaura G, Malinauskas A. Poly(N-methylaniline) vs. polyaniline: An extended pH range of polaron stability as revealed by Raman spectroelectrochemistry. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2021; 262:120140. [PMID: 34252739 DOI: 10.1016/j.saa.2021.120140] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/09/2021] [Revised: 06/28/2021] [Accepted: 06/30/2021] [Indexed: 06/13/2023]
Abstract
A comparative study of polyaniline (PANI) and poly(N-methylaniline) (PNMA) has been performed by means of Raman spectroelectrochemical technique at 633 nm and 785 nm laser line excitations. The excitation wavelengths used fall into a resonance with the blue colored semi- and full-oxidized forms of these conducting polymers. The dependence of Raman features on electrode potential and solution acidity was studied, and relative content of polaronic and bipolaronic states was evaluated. In an acidic solution, the semioxidized emeraldine form of either PANI or PNMA exists in equilibrium between their polaronic and bipolaronic states. In a neutral or even slightly alkaline solution, this equilibrium for PANI shifts to bipolaron state, resulting in loss of its conductance. For PNMA, however, the relative content of polaron state appears high enough even in pH-neutral soulions, thus determining a higher conductivity of PNMA in pH-neutral environment as compared to that of PANI. A mechanistic interpretation for this, based on differences in the chemical structures of these polymers, is also presented.
Collapse
Affiliation(s)
- Regina Mažeikienė
- Department of Organic Chemistry, Center for Physical Sciences and Technology (FTMC), Sauletekio av. 3, LT-10257 Vilnius, Lithuania
| | - Gediminas Niaura
- Department of Organic Chemistry, Center for Physical Sciences and Technology (FTMC), Sauletekio av. 3, LT-10257 Vilnius, Lithuania
| | - Albertas Malinauskas
- Department of Organic Chemistry, Center for Physical Sciences and Technology (FTMC), Sauletekio av. 3, LT-10257 Vilnius, Lithuania.
| |
Collapse
|
4
|
Liu Y, Pei R, Lv Y, Lin C, Huang J, Liu M. Removal behavior and mechanism of silver from low concentration wastewater using cellulose aerogel modified by thiosemicarbazide. J Appl Polym Sci 2021. [DOI: 10.1002/app.51226] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Affiliation(s)
- Yifan Liu
- College of Chemical Engineering Fuzhou University Fuzhou China
- Fujian Provincial Key Laboratory of Ecology‐Toxicological Effects and Control for Emerging Contaminants College of Environmental and Biological Engineering, Putian University Putian China
- Fujian Provincial Engineering Research Center of Rural Waste Recycling Technology College of Environment & Resources, Fuzhou University Fuzhou China
| | - Ruihan Pei
- Fujian Provincial Engineering Research Center of Rural Waste Recycling Technology College of Environment & Resources, Fuzhou University Fuzhou China
| | - Yuancai Lv
- Fujian Provincial Engineering Research Center of Rural Waste Recycling Technology College of Environment & Resources, Fuzhou University Fuzhou China
| | - Chunxiang Lin
- Fujian Provincial Engineering Research Center of Rural Waste Recycling Technology College of Environment & Resources, Fuzhou University Fuzhou China
| | - Jianhui Huang
- Fujian Provincial Key Laboratory of Ecology‐Toxicological Effects and Control for Emerging Contaminants College of Environmental and Biological Engineering, Putian University Putian China
| | - Minghua Liu
- College of Chemical Engineering Fuzhou University Fuzhou China
- Fujian Provincial Engineering Research Center of Rural Waste Recycling Technology College of Environment & Resources, Fuzhou University Fuzhou China
| |
Collapse
|
5
|
Wang L, Deng M, Xu H, Li W, Huang W, Yan N, Zhou Y, Chen J, Qu Z. Selective Reductive Removal of Silver Ions from Acidic Solutions by Redox-Active Covalent Organic Frameworks. ACS APPLIED MATERIALS & INTERFACES 2020; 12:37619-37627. [PMID: 32814408 DOI: 10.1021/acsami.0c11463] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
The selective removal and recovery of silver ions from an aqueous solution is necessary, owing to the toxicity, persistency, and recoverable value. Herein, we first reported that silver ions could be selectively removed from an acidic solution by utilizing redox-active covalent organic framework (COF) materials as an adsorbent, resulting in the loading of Ag nanoparticles (NPs) with a narrow size distribution onto the framework simultaneously. The redox-active COF not only showed promising performance in adsorbing silver ions but also had a high selectivity at a low pH value. Subsequently, it was found that the N sites of amine groups within the framework took responsibility for the Ag NP generation after the systematic investigation on the redox adsorption mechanism. Furthermore, the recycled Ag@COF materials could be further used as new adsorbents to remove Hg(II) ions from water via NPs as a "bridge", exhibiting ultrahigh atomic utilization (>100%). Accordingly, this work not only provides a novel insight for the use of redox-active COF in the removal of metal ions but also opens a new field for designing of functionalized COF for their potential application in diverse areas.
Collapse
Affiliation(s)
- Longlong Wang
- School of Environmental Science and Engineering, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai 200240, China
| | - Mei Deng
- CSSC Nanjing Luzhou Environmental Protection Co., Ltd., Nanjing 210039, China
| | - Haomiao Xu
- School of Environmental Science and Engineering, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai 200240, China
| | - Weiwei Li
- School of Environmental Science and Engineering, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai 200240, China
| | - Wenjun Huang
- School of Environmental Science and Engineering, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai 200240, China
| | - Naiqiang Yan
- School of Environmental Science and Engineering, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai 200240, China
| | - Yongxian Zhou
- CSSC Nanjing Luzhou Environmental Protection Co., Ltd., Nanjing 210039, China
| | - Jisai Chen
- CSSC Nanjing Luzhou Environmental Protection Co., Ltd., Nanjing 210039, China
| | - Zan Qu
- School of Environmental Science and Engineering, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai 200240, China
| |
Collapse
|
6
|
Synthesis of lignin-poly(N-methylaniline)-reduced graphene oxide hydrogel for organic dye and lead ions removal. JOURNAL OF BIORESOURCES AND BIOPRODUCTS 2020. [DOI: 10.1016/j.jobab.2020.07.006] [Citation(s) in RCA: 119] [Impact Index Per Article: 29.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
|