Bovine Serum Albumin Molecularly Imprinted Electrochemical Sensors Modified by Carboxylated Multi-Walled Carbon Nanotubes/CaAlg Hydrogels
In this paper, sodium alginate (NaAlg) was used as functional monomers, bovine serum albumin (BSA) was used as template molecules, and calcium chloride (CaCl<sub>2</sub>) aqueous solution was used as a cross-linking agent to prepare BSA molecularly imprinted carboxylated multi-wall carbo...
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MDPI AG
2023-08-01
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| Online Access: | https://www.mdpi.com/2310-2861/9/8/673 |
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| author | Letian Cheng Zhilong Guo Yuansheng Lin Xiujuan Wei Kongyin Zhao Zhengchun Yang |
| author_facet | Letian Cheng Zhilong Guo Yuansheng Lin Xiujuan Wei Kongyin Zhao Zhengchun Yang |
| author_sort | Letian Cheng |
| collection | DOAJ |
| description | In this paper, sodium alginate (NaAlg) was used as functional monomers, bovine serum albumin (BSA) was used as template molecules, and calcium chloride (CaCl<sub>2</sub>) aqueous solution was used as a cross-linking agent to prepare BSA molecularly imprinted carboxylated multi-wall carbon nanotubes (CMWCNT)/CaAlg hydrogel films (MIPs) and non-imprinted hydrogel films (NIPs). The adsorption capacity of the MIP film for BSA was 27.23 mg/g and the imprinting efficiency was 2.73. The MIP and NIP hydrogel film were loaded on the surface of the printed electrode, and electrochemical performance tests were carried out by electrochemical impedance spectroscopy (EIS) and differential pulse voltammetry (DPV) using the electrochemical workstation. The loaded MIP film and NIP film effectively improved the electrochemical signal of the bare carbon electrode. When the pH value of the Tris HCl elution solution was 7.4, the elution time was 15 min and the adsorption time was 15 min, and the peak currents of MIP-modified electrodes and NIP-modified electrodes reached their maximum values. There was a specific interaction between MIP-modified electrodes and BSA, exhibiting specific recognition for BSA. In addition, the MIP-modified electrodes had good anti-interference, reusability, stability, and reproducibility. The detection limit (LOD) was 5.6 × 10<sup>−6</sup> mg mL<sup>−1</sup>. |
| first_indexed | 2024-03-10T23:55:39Z |
| format | Article |
| id | doaj.art-c404cdc685f643ff9b02d271c4495c73 |
| institution | Directory Open Access Journal |
| issn | 2310-2861 |
| language | English |
| last_indexed | 2024-03-10T23:55:39Z |
| publishDate | 2023-08-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Gels |
| spelling | doaj.art-c404cdc685f643ff9b02d271c4495c732023-11-19T01:14:13ZengMDPI AGGels2310-28612023-08-019867310.3390/gels9080673Bovine Serum Albumin Molecularly Imprinted Electrochemical Sensors Modified by Carboxylated Multi-Walled Carbon Nanotubes/CaAlg HydrogelsLetian Cheng0Zhilong Guo1Yuansheng Lin2Xiujuan Wei3Kongyin Zhao4Zhengchun Yang5State Key Laboratory of Separation Membranes and Membrane Processes, Tiangong University, Tianjin 300387, ChinaState Key Laboratory of Separation Membranes and Membrane Processes, Tiangong University, Tianjin 300387, ChinaState Key Laboratory of Separation Membranes and Membrane Processes, Tiangong University, Tianjin 300387, ChinaState Key Laboratory of Separation Membranes and Membrane Processes, Tiangong University, Tianjin 300387, ChinaState Key Laboratory of Separation Membranes and Membrane Processes, Tiangong University, Tianjin 300387, ChinaTianjin Key Laboratory of Film Electronic & Communication Devices, Tianjin University of Technology, Tianjin 300384, ChinaIn this paper, sodium alginate (NaAlg) was used as functional monomers, bovine serum albumin (BSA) was used as template molecules, and calcium chloride (CaCl<sub>2</sub>) aqueous solution was used as a cross-linking agent to prepare BSA molecularly imprinted carboxylated multi-wall carbon nanotubes (CMWCNT)/CaAlg hydrogel films (MIPs) and non-imprinted hydrogel films (NIPs). The adsorption capacity of the MIP film for BSA was 27.23 mg/g and the imprinting efficiency was 2.73. The MIP and NIP hydrogel film were loaded on the surface of the printed electrode, and electrochemical performance tests were carried out by electrochemical impedance spectroscopy (EIS) and differential pulse voltammetry (DPV) using the electrochemical workstation. The loaded MIP film and NIP film effectively improved the electrochemical signal of the bare carbon electrode. When the pH value of the Tris HCl elution solution was 7.4, the elution time was 15 min and the adsorption time was 15 min, and the peak currents of MIP-modified electrodes and NIP-modified electrodes reached their maximum values. There was a specific interaction between MIP-modified electrodes and BSA, exhibiting specific recognition for BSA. In addition, the MIP-modified electrodes had good anti-interference, reusability, stability, and reproducibility. The detection limit (LOD) was 5.6 × 10<sup>−6</sup> mg mL<sup>−1</sup>.https://www.mdpi.com/2310-2861/9/8/673calcium alginate hydrogelprotein molecular imprintingelectrochemical sensorcarboxylated multi-walled carbon nanotubes |
| spellingShingle | Letian Cheng Zhilong Guo Yuansheng Lin Xiujuan Wei Kongyin Zhao Zhengchun Yang Bovine Serum Albumin Molecularly Imprinted Electrochemical Sensors Modified by Carboxylated Multi-Walled Carbon Nanotubes/CaAlg Hydrogels Gels calcium alginate hydrogel protein molecular imprinting electrochemical sensor carboxylated multi-walled carbon nanotubes |
| title | Bovine Serum Albumin Molecularly Imprinted Electrochemical Sensors Modified by Carboxylated Multi-Walled Carbon Nanotubes/CaAlg Hydrogels |
| title_full | Bovine Serum Albumin Molecularly Imprinted Electrochemical Sensors Modified by Carboxylated Multi-Walled Carbon Nanotubes/CaAlg Hydrogels |
| title_fullStr | Bovine Serum Albumin Molecularly Imprinted Electrochemical Sensors Modified by Carboxylated Multi-Walled Carbon Nanotubes/CaAlg Hydrogels |
| title_full_unstemmed | Bovine Serum Albumin Molecularly Imprinted Electrochemical Sensors Modified by Carboxylated Multi-Walled Carbon Nanotubes/CaAlg Hydrogels |
| title_short | Bovine Serum Albumin Molecularly Imprinted Electrochemical Sensors Modified by Carboxylated Multi-Walled Carbon Nanotubes/CaAlg Hydrogels |
| title_sort | bovine serum albumin molecularly imprinted electrochemical sensors modified by carboxylated multi walled carbon nanotubes caalg hydrogels |
| topic | calcium alginate hydrogel protein molecular imprinting electrochemical sensor carboxylated multi-walled carbon nanotubes |
| url | https://www.mdpi.com/2310-2861/9/8/673 |
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