Polymer/BiOBr-Modified Gauze as a Dual-Functional Membrane for Heavy Metal Removal and Photocatalytic Dye Decolorization
It is crucial to remove heavy metals and dyes before discharging industrial effluents. Gauze substrate was surface-modified by coating with a polymeric adsorbent and a spray coating of BiOBr photocatalyst to develop a novel dual-functional membrane, polymer/BiOBr-modified gauze, for water remediatio...
| Main Authors: | , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2020-09-01
|
| Series: | Polymers |
| Subjects: | |
| Online Access: | https://www.mdpi.com/2073-4360/12/9/2082 |
| _version_ | 1797553823716212736 |
|---|---|
| author | Chi-Jung Chang Pei-Yao Chao Chen-Yi Chou Ying-Jen Chen Chih-Feng Huang |
| author_facet | Chi-Jung Chang Pei-Yao Chao Chen-Yi Chou Ying-Jen Chen Chih-Feng Huang |
| author_sort | Chi-Jung Chang |
| collection | DOAJ |
| description | It is crucial to remove heavy metals and dyes before discharging industrial effluents. Gauze substrate was surface-modified by coating with a polymeric adsorbent and a spray coating of BiOBr photocatalyst to develop a novel dual-functional membrane, polymer/BiOBr-modified gauze, for water remediation. The polymeric adsorbent was crosslinked to prevent the dissolving of the adsorbent during operation in contaminated water. The morphology and surface chemistry of the modified gauze were characterized before and after the adsorption of Ni<sup>2+</sup>. The surface wettability, isotherms, and kinetics of Ni<sup>2+</sup> adsorption were studied. We also studied the effect of pH, initial Ni<sup>2+</sup> concentration, monomer molar ratio, and monomer chemical structure on the Ni<sup>2+</sup> adsorption capacity. To achieve a high Ni<sup>2+</sup> adsorption capacity and good photocatalytic decolorization activity, the amount of decorated BiOBr was tuned by changing the spray-coating time to optimize the exposed BiOBr and polymer on the surface. The optimized dual-functional membrane PB20 possesses excellent adsorption capacity (650 mg g<sup>−1</sup>) for Ni<sup>2+</sup> ions and photocatalytic decolorization activity (100% degradation of RhB within 7 min). Decorating the optimized amount of BiOBr on the surface can introduce photocatalytic decolorization activity without sacrificing the adsorption capacity for Ni<sup>2+</sup>. |
| first_indexed | 2024-03-10T16:22:08Z |
| format | Article |
| id | doaj.art-fb6b2fc145cf4c7e86eb81948a7be101 |
| institution | Directory Open Access Journal |
| issn | 2073-4360 |
| language | English |
| last_indexed | 2024-03-10T16:22:08Z |
| publishDate | 2020-09-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Polymers |
| spelling | doaj.art-fb6b2fc145cf4c7e86eb81948a7be1012023-11-20T13:36:11ZengMDPI AGPolymers2073-43602020-09-01129208210.3390/polym12092082Polymer/BiOBr-Modified Gauze as a Dual-Functional Membrane for Heavy Metal Removal and Photocatalytic Dye DecolorizationChi-Jung Chang0Pei-Yao Chao1Chen-Yi Chou2Ying-Jen Chen3Chih-Feng Huang4Department of Chemical Engineering, Feng Chia University, 100, Wenhwa Road, Seatwen, Taichung 40724, TaiwanDepartment of Chemical Engineering, Feng Chia University, 100, Wenhwa Road, Seatwen, Taichung 40724, TaiwanDepartment of Chemical Engineering, Feng Chia University, 100, Wenhwa Road, Seatwen, Taichung 40724, TaiwanDepartment of Chemical Engineering, Feng Chia University, 100, Wenhwa Road, Seatwen, Taichung 40724, TaiwanDepartment of Chemical Engineering, i-Center for Advanced Science and Technology (ICAST), National Chung Hsing University, Eng Bld 3, 250 Kuo Kuang Road, Taichung 40227, TaiwanIt is crucial to remove heavy metals and dyes before discharging industrial effluents. Gauze substrate was surface-modified by coating with a polymeric adsorbent and a spray coating of BiOBr photocatalyst to develop a novel dual-functional membrane, polymer/BiOBr-modified gauze, for water remediation. The polymeric adsorbent was crosslinked to prevent the dissolving of the adsorbent during operation in contaminated water. The morphology and surface chemistry of the modified gauze were characterized before and after the adsorption of Ni<sup>2+</sup>. The surface wettability, isotherms, and kinetics of Ni<sup>2+</sup> adsorption were studied. We also studied the effect of pH, initial Ni<sup>2+</sup> concentration, monomer molar ratio, and monomer chemical structure on the Ni<sup>2+</sup> adsorption capacity. To achieve a high Ni<sup>2+</sup> adsorption capacity and good photocatalytic decolorization activity, the amount of decorated BiOBr was tuned by changing the spray-coating time to optimize the exposed BiOBr and polymer on the surface. The optimized dual-functional membrane PB20 possesses excellent adsorption capacity (650 mg g<sup>−1</sup>) for Ni<sup>2+</sup> ions and photocatalytic decolorization activity (100% degradation of RhB within 7 min). Decorating the optimized amount of BiOBr on the surface can introduce photocatalytic decolorization activity without sacrificing the adsorption capacity for Ni<sup>2+</sup>.https://www.mdpi.com/2073-4360/12/9/2082adsorbentphotocatalystheavy metaldyeBiOBrpolyethyleneimine |
| spellingShingle | Chi-Jung Chang Pei-Yao Chao Chen-Yi Chou Ying-Jen Chen Chih-Feng Huang Polymer/BiOBr-Modified Gauze as a Dual-Functional Membrane for Heavy Metal Removal and Photocatalytic Dye Decolorization Polymers adsorbent photocatalyst heavy metal dye BiOBr polyethyleneimine |
| title | Polymer/BiOBr-Modified Gauze as a Dual-Functional Membrane for Heavy Metal Removal and Photocatalytic Dye Decolorization |
| title_full | Polymer/BiOBr-Modified Gauze as a Dual-Functional Membrane for Heavy Metal Removal and Photocatalytic Dye Decolorization |
| title_fullStr | Polymer/BiOBr-Modified Gauze as a Dual-Functional Membrane for Heavy Metal Removal and Photocatalytic Dye Decolorization |
| title_full_unstemmed | Polymer/BiOBr-Modified Gauze as a Dual-Functional Membrane for Heavy Metal Removal and Photocatalytic Dye Decolorization |
| title_short | Polymer/BiOBr-Modified Gauze as a Dual-Functional Membrane for Heavy Metal Removal and Photocatalytic Dye Decolorization |
| title_sort | polymer biobr modified gauze as a dual functional membrane for heavy metal removal and photocatalytic dye decolorization |
| topic | adsorbent photocatalyst heavy metal dye BiOBr polyethyleneimine |
| url | https://www.mdpi.com/2073-4360/12/9/2082 |
| work_keys_str_mv | AT chijungchang polymerbiobrmodifiedgauzeasadualfunctionalmembraneforheavymetalremovalandphotocatalyticdyedecolorization AT peiyaochao polymerbiobrmodifiedgauzeasadualfunctionalmembraneforheavymetalremovalandphotocatalyticdyedecolorization AT chenyichou polymerbiobrmodifiedgauzeasadualfunctionalmembraneforheavymetalremovalandphotocatalyticdyedecolorization AT yingjenchen polymerbiobrmodifiedgauzeasadualfunctionalmembraneforheavymetalremovalandphotocatalyticdyedecolorization AT chihfenghuang polymerbiobrmodifiedgauzeasadualfunctionalmembraneforheavymetalremovalandphotocatalyticdyedecolorization |