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Liang Y, Cai R, Hickey DP, Kitt JP, Harris JM, Minteer SD, Korzeniewski C. Infrared Microscopy as a Probe of Composition within a Model Biofuel Cell Electrode Prepared from
Trametes versicolor
Laccase. ChemElectroChem 2018. [DOI: 10.1002/celc.201801178] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Affiliation(s)
- Ying Liang
- Department of Chemistry and Biochemistry Texas Tech University Lubbock TX 79409-1061 USA
| | - Rong Cai
- Department of Chemistry University of Utah Salt Lake City UT 84112 USA
| | - David P. Hickey
- Department of Chemistry University of Utah Salt Lake City UT 84112 USA
| | - Jay P. Kitt
- Department of Chemistry University of Utah Salt Lake City UT 84112 USA
| | - Joel M. Harris
- Department of Chemistry University of Utah Salt Lake City UT 84112 USA
| | | | - Carol Korzeniewski
- Department of Chemistry and Biochemistry Texas Tech University Lubbock TX 79409-1061 USA
- Department of Chemistry University of Utah Salt Lake City UT 84112 USA
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Kiefer J, Bartels J, Kroll S, Rezwan K. Vibrational Spectroscopy as a Promising Toolbox for Analyzing Functionalized Ceramic Membranes. APPLIED SPECTROSCOPY 2018; 72:947-955. [PMID: 29667431 DOI: 10.1177/0003702818769479] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Ceramic materials find use in many fields including the life sciences and environmental engineering. For example, ceramic membranes have shown to be promising filters for water treatment and virus retention. The analysis of such materials, however, remains challenging. In the present study, the potential of three vibrational spectroscopic methods for characterizing functionalized ceramic membranes for water treatment is evaluated. For this purpose, Raman scattering, infrared (IR) absorption, and solvent infrared spectroscopy (SIRS) were employed. The data were analyzed with respect to spectral changes as well as using principal component analysis (PCA). The Raman spectra allow an unambiguous discrimination of the sample types. The IR spectra do not change systematically with functionalization state of the material. Solvent infrared spectroscopy allows a systematic distinction and enables studying the molecular interactions between the membrane surface and the solvent.
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Affiliation(s)
- Johannes Kiefer
- 1 Technische Thermodynamik, University of Bremen, Bremen, Germany
- 2 Center for Materials and Processes (MAPEX), University of Bremen, Bremen, Germany
- 3 School of Engineering, University of Aberdeen, Aberdeen, UK
| | - Julia Bartels
- 4 Advanced Ceramics, University of Bremen, Bremen, Germany
| | - Stephen Kroll
- 2 Center for Materials and Processes (MAPEX), University of Bremen, Bremen, Germany
- 5 IfBB-Institute for Bioplastics and Biocomposites, Hochschule Hannover- University of Applied Sciences and Arts, Hannover, Germany
| | - Kurosch Rezwan
- 2 Center for Materials and Processes (MAPEX), University of Bremen, Bremen, Germany
- 4 Advanced Ceramics, University of Bremen, Bremen, Germany
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Korzeniewski C, Liang Y, Zhang P, Sharif I, Kitt JP, Harris JM, Hamrock SJ, Creager SE, DesMarteau DD. Vibrational Spectroscopy for the Determination of Ionizable Group Content in Ionomer Materials. APPLIED SPECTROSCOPY 2018; 72:141-150. [PMID: 28782369 DOI: 10.1177/0003702817728243] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
An approach based on vibrational spectral measurements is described for determining the ionizable group content of ion conducting polymer membrane materials. Aimed at supporting the assessment of membrane stability and wear characteristics, performance is evaluated for attenuated total reflection Fourier transform infrared (ATR FT-IR) spectroscopy, confocal Raman microscopy, and ATR FT-IR microscopy using perfluorinated ionomer membrane standards. One set of ionomer standards contained a sulfonic acid ionizable group and the other a sulfonyl imide group. The average number of backbone tetrafluoroethylene (TFE) units separating the ionizable-group containing side chains was in the range of 7.2-2.1 (sulfonic acid set) and 10.5-4.6 (sulfonyl imide set). A poly(tetrafluoroethylene) (PTFE) sample was included as a blank, representing the limit of zero ionizable group (and maximum TFE) content. Calibration relationships were derived from area-normalized vibrational spectra. For all three methods, calibration models applied to independent spectral measurements of samples predicted the ratio of backbone TFE groups to ionizable groups in the repeat unit ( m) with a standard error of ≤ ±0.3. The confocal Raman and ATR FT-IR microscopy techniques achieved ideal blank responses and the lowest prediction errors, down to m ± 0.1 at the 90% confidence level. With its relative simplicity, low sample size requirements, and potential for quantitative micron-scale spatial mapping of the ionizable group content within a membrane, the approach has application to advancing materials development, including exploratory synthesis, durability and wear assessment, and in situ studies of membrane process.
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Affiliation(s)
- Carol Korzeniewski
- 1 6177 Department of Chemistry and Biochemistry, Texas Tech University, Lubbock, TX, USA
| | - Ying Liang
- 1 6177 Department of Chemistry and Biochemistry, Texas Tech University, Lubbock, TX, USA
| | - Pei Zhang
- 1 6177 Department of Chemistry and Biochemistry, Texas Tech University, Lubbock, TX, USA
| | - Iqbal Sharif
- 2 Department of Chemistry, Clemson University, Hunter Laboratories, Clemson, SC, USA
| | - Jay P Kitt
- 3 Department of Chemistry, University of Utah, Salt Lake City, UT, USA
| | - Joel M Harris
- 3 Department of Chemistry, University of Utah, Salt Lake City, UT, USA
| | - Steven J Hamrock
- 4 3M Energy Components Group, 3M Center, St Paul, MN, USA (retired)
| | - Stephen E Creager
- 2 Department of Chemistry, Clemson University, Hunter Laboratories, Clemson, SC, USA
| | - Darryl D DesMarteau
- 2 Department of Chemistry, Clemson University, Hunter Laboratories, Clemson, SC, USA
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Zhou Z, Huang G, Xiong Y, Zhou M, Zhang S, Tang CY, Meng F. Unveiling the Susceptibility of Functional Groups of Poly(ether sulfone)/Polyvinylpyrrolidone Membranes to NaOCl: A Two-Dimensional Correlation Spectroscopic Study. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2017; 51:14342-14351. [PMID: 29135237 DOI: 10.1021/acs.est.7b03952] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
A clear understanding of membrane aging process is essential for the optimization of chemical cleaning in membrane-based facilities. In this study, two-dimensional (2D) Fourier transformation infrared (FTIR) correlation spectroscopy (CoS) analysis was first used to decipher the sequential order of functional group changes of NaOCl-aged poly(ether sulfone)/polyvinylpyrrolidone (PES/PVP) membranes. The synchronous maps showed 12 major autopeaks in total. Based on the asynchronous maps, a similar aging sequence of membrane groups was clearly identified at three pHs (i.e., 6, 8, and 10): 1463, 1440, and 1410 (cyclic C-H structures) > 1662 (amide groups) > 1700 (succinimide groups) > 1320, 1292 (S═O asymmetric) > 1486, 1580 (aromatic structures) > 1241 (aromatic ether bands) > 1105, 1150 cm-1 (O═S═O symmetric). Among them, membrane chlorination occurred at 1241, 1410, and 1440 cm-1. Moreover, the initial degradation of PVP and the subsequent transformation of PES could be highly responsible for the increased water permeability and the enlargement of membrane pores, respectively, both leading to serious fouling with humic acid filtration. In summary, the 2D-FTIR-CoS analysis is a powerful approach to reveal the interaction mechanisms of NaOCl-membrane and could be also useful to probe the process of membrane fouling and chemical cleaning.
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Affiliation(s)
- Zhongbo Zhou
- School of Environmental Science and Engineering, Sun Yat-sen University , Guangzhou 510006, China
- Guangdong Provincial Key Laboratory of Environmental Pollution Control and Remediation Technology, Sun Yat-sen University , Guangzhou 510275, China
| | - Guocheng Huang
- School of Environmental Science and Engineering, Sun Yat-sen University , Guangzhou 510006, China
- Guangdong Provincial Key Laboratory of Environmental Pollution Control and Remediation Technology, Sun Yat-sen University , Guangzhou 510275, China
| | - Yi Xiong
- School of Environmental Science and Engineering, Sun Yat-sen University , Guangzhou 510006, China
- Guangdong Provincial Key Laboratory of Environmental Pollution Control and Remediation Technology, Sun Yat-sen University , Guangzhou 510275, China
| | - Minghao Zhou
- School of Environmental Science and Engineering, Sun Yat-sen University , Guangzhou 510006, China
- Guangdong Provincial Key Laboratory of Environmental Pollution Control and Remediation Technology, Sun Yat-sen University , Guangzhou 510275, China
| | - Shaoqing Zhang
- School of Environmental Science and Engineering, Sun Yat-sen University , Guangzhou 510006, China
- Guangdong Provincial Key Laboratory of Environmental Pollution Control and Remediation Technology, Sun Yat-sen University , Guangzhou 510275, China
| | - Chuyang Y Tang
- Department of Civil Engineering, The University of Hong Kong , Pokfulam, Hong Kong
| | - Fangang Meng
- School of Environmental Science and Engineering, Sun Yat-sen University , Guangzhou 510006, China
- Guangdong Provincial Key Laboratory of Environmental Pollution Control and Remediation Technology, Sun Yat-sen University , Guangzhou 510275, China
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