Pub Date : 2024-06-04DOI: 10.1007/s11244-024-01965-1
Thuy Lac Yen Nguyen, Minh Dai To, Minh Thu Le, Chi Thien Nguyen, Nguyet Thi Nhu Pham, Hoa Cong Nguyen, Hoang Long Ngo, Tan Le Hoang Doan, Thanh Tung Nguyen, Viet Hai Le, Thai Hoang Nguyen
In the recent years, piezocatalysis process is attracting extensive attention as an emerging technology to remove persistent organic pollutants. Its advantage is that it relies on mechanical energy and is independent of electricity and light source, unlike electrocatalysis or photocatalysis processes. In this research, 2H-MoS2/g-C3N4 heterojunction materials were successfully fabricated via the hydrothermal method and utilized as piezocatalyst in the treatment of Rhodamine B. This material exhibited a highly efficient piezo-catalyst effect, with the piezo-response amplitudes of 78.8 mV, almost doubled compared to 39.8 mV of 2H-MoS2. The degradation of Rhodamine B by ultrasonic irradiation could reach 75.4% only after 5 s and then 94.9% in 60 s without light assistance. This ultra-rapid degradation rate is attributed to the electron–hole pairs and transfer of the charge-carriers on the surface of 2H-MoS2 and g-C3N4 via S-scheme heterojunction model, which was confirmed by density functional theory study. The piezo-catalytic ability of the material can still be improved for better treatment of other organic pollutants in aqueous environment.
{"title":"Novel Application of 2 H-MoS2/g-C3N4 Nanocomposite in Piezo-Catalytic Degradation of Rhodamine B Under Ultrasonic Irradiation","authors":"Thuy Lac Yen Nguyen, Minh Dai To, Minh Thu Le, Chi Thien Nguyen, Nguyet Thi Nhu Pham, Hoa Cong Nguyen, Hoang Long Ngo, Tan Le Hoang Doan, Thanh Tung Nguyen, Viet Hai Le, Thai Hoang Nguyen","doi":"10.1007/s11244-024-01965-1","DOIUrl":"10.1007/s11244-024-01965-1","url":null,"abstract":"<div><p>In the recent years, piezocatalysis process is attracting extensive attention as an emerging technology to remove persistent organic pollutants. Its advantage is that it relies on mechanical energy and is independent of electricity and light source, unlike electrocatalysis or photocatalysis processes. In this research, 2H-MoS<sub>2</sub>/g-C<sub>3</sub>N<sub>4</sub> heterojunction materials were successfully fabricated via the hydrothermal method and utilized as piezocatalyst in the treatment of Rhodamine B. This material exhibited a highly efficient piezo-catalyst effect, with the piezo-response amplitudes of 78.8 mV, almost doubled compared to 39.8 mV of 2H-MoS<sub>2</sub>. The degradation of Rhodamine B by ultrasonic irradiation could reach 75.4% only after 5 s and then 94.9% in 60 s without light assistance. This ultra-rapid degradation rate is attributed to the electron–hole pairs and transfer of the charge-carriers on the surface of 2H-MoS<sub>2</sub> and g-C<sub>3</sub>N<sub>4</sub> via S-scheme heterojunction model, which was confirmed by density functional theory study. The piezo-catalytic ability of the material can still be improved for better treatment of other organic pollutants in aqueous environment.</p></div>","PeriodicalId":801,"journal":{"name":"Topics in Catalysis","volume":"67 17-18","pages":"1141 - 1154"},"PeriodicalIF":2.8,"publicationDate":"2024-06-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141255644","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-05-31DOI: 10.1007/s11244-024-01970-4
Clara Dourado Fernandes, Vera Lucia Scherholz Salgado de Castro, José Henrique Vallim, Atif Khurshid Wani, Juliana Heloisa Pinê Américo-Pinheiro, Teresa Serejo, Rinaldo Wellerson Pereira, Silvia Maria Egues, Luiz Fernando Romanholo Ferreira
In biotechnological methods for biodegradation, the effectiveness of detoxifying xenobiotics and recalcitrant substances in soil and water has sparked significant interest. Our study takes a unique approach by focusing on immobilizing the white-rot fungus (WRF) Pleurotus sajor-caju onto a Luffa cylindrica plant support. This innovative method aims to facilitate the mycoremediation of agro-industrial pollutant pulp wash generated by the orange industry. The immobilization process significantly increased MnP enzymatic activity, reaching 23 IU.mL−1 and Lac activity at approximately 40.5 IU.mL−1. Qualitative SEM and FTIR analyses provided insights into the microorganism’s attachment mechanism to the support, suggesting that aggregation occurs due to an affinity to the lignocellulosic structure, enhancing the production of polysaccharides responsible for biocatalyst adherence and potential reusability. Furthermore, the production of an enzymatic extract rich in ligninolytic enzymes from P. sajor-caju showcased its ability to reduce the toxicity of pulp wash. An exploration into the toxicity of citrus effluent revealed the generation of embryos with severe deformities and the inhibition of Lactuca sativa germination, even at low concentrations. Notably, post-treatment with the enzymatic extract resulted in a remarkable 90% reduction in toxicity to the trophic level of Danio rerio and lettuce seeds. This research significantly contributes to understanding fungal immobilization strategies in environmental biotechnology, emphasizing the potential of agricultural residues as sustainable inducers for enzyme production and their pivotal role in mitigating the environmental impact of agro-industrial waste.
{"title":"Enzymatic Extract from Luffa-Immobilized Pleurotus sajor-caju: A Promising Biocatalyst for Agro-Industrial Pollutant Reduction and Toxicity Mitigation","authors":"Clara Dourado Fernandes, Vera Lucia Scherholz Salgado de Castro, José Henrique Vallim, Atif Khurshid Wani, Juliana Heloisa Pinê Américo-Pinheiro, Teresa Serejo, Rinaldo Wellerson Pereira, Silvia Maria Egues, Luiz Fernando Romanholo Ferreira","doi":"10.1007/s11244-024-01970-4","DOIUrl":"https://doi.org/10.1007/s11244-024-01970-4","url":null,"abstract":"<p>In biotechnological methods for biodegradation, the effectiveness of detoxifying xenobiotics and recalcitrant substances in soil and water has sparked significant interest. Our study takes a unique approach by focusing on immobilizing the white-rot fungus (WRF) <i>Pleurotus sajor-caju</i> onto a <i>Luffa cylindrica</i> plant support. This innovative method aims to facilitate the mycoremediation of agro-industrial pollutant <i>pulp wash</i> generated by the orange industry. The immobilization process significantly increased MnP enzymatic activity, reaching 23 IU.mL<sup>−1</sup> and Lac activity at approximately 40.5 IU.mL<sup>−1</sup>. Qualitative SEM and FTIR analyses provided insights into the microorganism’s attachment mechanism to the support, suggesting that aggregation occurs due to an affinity to the lignocellulosic structure, enhancing the production of polysaccharides responsible for biocatalyst adherence and potential reusability. Furthermore, the production of an enzymatic extract rich in ligninolytic enzymes from <i>P. sajor-caju</i> showcased its ability to reduce the toxicity of <i>pulp wash</i>. An exploration into the toxicity of citrus effluent revealed the generation of embryos with severe deformities and the inhibition of <i>Lactuca sativa</i> germination, even at low concentrations. Notably, post-treatment with the enzymatic extract resulted in a remarkable 90% reduction in toxicity to the trophic level of <i>Danio rerio</i> and lettuce seeds. This research significantly contributes to understanding fungal immobilization strategies in environmental biotechnology, emphasizing the potential of agricultural residues as sustainable inducers for enzyme production and their pivotal role in mitigating the environmental impact of agro-industrial waste.</p>","PeriodicalId":801,"journal":{"name":"Topics in Catalysis","volume":"40 1","pages":""},"PeriodicalIF":3.6,"publicationDate":"2024-05-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141190150","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-05-30DOI: 10.1007/s11244-024-01969-x
Muhammad Asif, Muhammad Shafiq, Faiza Imtiaz, Sheraz Ahmed, Abdulrahman Ali Alazba, Hafiz Nawaz Hussain, Farah Nemat Butt, Syeda Alvia Zainab, Muhammad Kashif Khan, Muhammad Bilal
Pollution from dye-containing industrial wastewater is a major health hazard in many nations, necessitating modern remediation approaches. Herein, zinc oxide (ZnO) was employed to degrade methyl orange (MO) as an organic dye pollutant under UV light irradiation. The performance was observed experimentally and theoretically under optimized conditions including the pH (11), the concentration of the nanoparticle solution (900 ppm), and time (3 h), resulting in a degradation efficiency of 89.6%. Furthermore, the influence of various parameters on MO degradation was evaluated by response surface methodology (RSM). X-ray diffraction (XRD) and transmission electron microscopy (TEM) was performed to investigate the crystallinity and morphological behavior of ZnO-NPs. In addition, the surface chemical composition was evaluated by the XPS analysis. This study evaluates the degradation efficiency of ~ 90% using single metal oxide to degrade MO, opening new opportunities for environmental applications.
在许多国家,含染料工业废水的污染是对健康的一大危害,因此需要采用现代化的治理方法。本文采用氧化锌(ZnO)在紫外光照射下降解有机染料污染物甲基橙(MO)。在 pH 值(11)、纳米粒子溶液浓度(900 ppm)和时间(3 h)等优化条件下,实验和理论观察了其性能,结果表明降解效率为 89.6%。此外,还利用响应面法(RSM)评估了各种参数对 MO 降解的影响。通过 X 射线衍射(XRD)和透射电子显微镜(TEM)研究了 ZnO-NPs 的结晶度和形态行为。此外,还通过 XPS 分析评估了表面化学成分。这项研究评估了使用单一金属氧化物降解 MO 的降解效率约为 90%,为环境应用带来了新的机遇。
{"title":"Photocatalytic Degradation of Methyl Orange from Aqueous Solution Using ZnO by Response Surface Methodology","authors":"Muhammad Asif, Muhammad Shafiq, Faiza Imtiaz, Sheraz Ahmed, Abdulrahman Ali Alazba, Hafiz Nawaz Hussain, Farah Nemat Butt, Syeda Alvia Zainab, Muhammad Kashif Khan, Muhammad Bilal","doi":"10.1007/s11244-024-01969-x","DOIUrl":"https://doi.org/10.1007/s11244-024-01969-x","url":null,"abstract":"<p>Pollution from dye-containing industrial wastewater is a major health hazard in many nations, necessitating modern remediation approaches. Herein, zinc oxide (ZnO) was employed to degrade methyl orange (MO) as an organic dye pollutant under UV light irradiation. The performance was observed experimentally and theoretically under optimized conditions including the pH (11), the concentration of the nanoparticle solution (900 ppm), and time (3 h), resulting in a degradation efficiency of 89.6%. Furthermore, the influence of various parameters on MO degradation was evaluated by response surface methodology (RSM). X-ray diffraction (XRD) and transmission electron microscopy (TEM) was performed to investigate the crystallinity and morphological behavior of ZnO-NPs. In addition, the surface chemical composition was evaluated by the XPS analysis. This study evaluates the degradation efficiency of ~ 90% using single metal oxide to degrade MO, opening new opportunities for environmental applications.</p>","PeriodicalId":801,"journal":{"name":"Topics in Catalysis","volume":"2010 1","pages":""},"PeriodicalIF":3.6,"publicationDate":"2024-05-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141190106","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-05-28DOI: 10.1007/s11244-024-01971-3
Salima Es Sih, Francisco Franco-Duro, Cristina García-Sancho, Francisco José García-Mateos, Juana María Rosas, Ramón Moreno-Tost, Pedro Maireles-Torres, Juan Antonio Cecilia
Two phyllosilicates (montmorillonite and saponite) have been selected as starting materials to synthesize ZrO2- and Al2O3-pillared clays by the insertion of polyoxocations and subsequent calcination. These pillared clays display higher surface area, porosity and available acid sites in comparison to their respective raw clays. These samples were tested in the one-pot process to transform furfural into obtain valuable products. The incorporation of ZrO2 allows to reach the highest furfural conversion values, with high yields towards furfuryl alcohol (FOL) at shorter reaction times, whereas the formation of i-propyl furfuryl ether (iPFE) is favored at longer times, attaining iPFE yields of about 50% after 24 h at 170 ºC, using isopropanol as sacrificing alcohol.
{"title":"Valorization of Furfural to Obtain High Value-Added Products with ZrO2- and Al2O3-Pillared Clays","authors":"Salima Es Sih, Francisco Franco-Duro, Cristina García-Sancho, Francisco José García-Mateos, Juana María Rosas, Ramón Moreno-Tost, Pedro Maireles-Torres, Juan Antonio Cecilia","doi":"10.1007/s11244-024-01971-3","DOIUrl":"https://doi.org/10.1007/s11244-024-01971-3","url":null,"abstract":"<p>Two phyllosilicates (montmorillonite and saponite) have been selected as starting materials to synthesize ZrO<sub>2</sub>- and Al<sub>2</sub>O<sub>3</sub>-pillared clays by the insertion of polyoxocations and subsequent calcination. These pillared clays display higher surface area, porosity and available acid sites in comparison to their respective raw clays. These samples were tested in the one-pot process to transform furfural into obtain valuable products. The incorporation of ZrO<sub>2</sub> allows to reach the highest furfural conversion values, with high yields towards furfuryl alcohol (FOL) at shorter reaction times, whereas the formation of i-propyl furfuryl ether (iPFE) is favored at longer times, attaining iPFE yields of about 50% after 24 h at 170 ºC, using isopropanol as sacrificing alcohol.</p>","PeriodicalId":801,"journal":{"name":"Topics in Catalysis","volume":"22 1","pages":""},"PeriodicalIF":3.6,"publicationDate":"2024-05-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141169493","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Over time, industrialization, population expansion, building, and other human-related activities have made water contamination a major problem. As a result, steps towards waste water treatment must be taken. By using piezoelectric materials in the purifying process, a new area of waste water treatment known as piezo-photocatalysis has emerged. To improve the material’s water purification effectiveness, the piezoelectric action is paired with sun irradiation in this case. Up until this point, photocatalysis has served as a sophisticated method for purification. Thus, the piezoelectric materials became the center of attention in the quest for cutting-edge technologies for water purification. Piezoelectric materials have other potential applications outside of water treatment, including hydrogen production and carbon dioxide adsorption. The lead, barium, KNN, and bismuth perovskite compounds that have seen extensive usage in wastewater treatment are covered in this paper. These materials have the potential to achieve an efficiency of almost 100% when they combine the effects of piezoelectricity with photocatalysis. Consequently, the function of piezoelectric materials in wastewater treatment and the mechanism of piezo-photocatalysis are covered extensively in this paper.
{"title":"Waste Water Treatment Using Piezoelectric Materials: A Review on Piezo-photocatalysis","authors":"Karambir Singh, Ritesh Verma, Ankush Chauhan, Rohit Jasrotia, Shobhit Saini, Pankaj Thakur, Vinod Kumar, Preeti Thakur, Atul Thakur","doi":"10.1007/s11244-024-01966-0","DOIUrl":"10.1007/s11244-024-01966-0","url":null,"abstract":"<div><p>Over time, industrialization, population expansion, building, and other human-related activities have made water contamination a major problem. As a result, steps towards waste water treatment must be taken. By using piezoelectric materials in the purifying process, a new area of waste water treatment known as piezo-photocatalysis has emerged. To improve the material’s water purification effectiveness, the piezoelectric action is paired with sun irradiation in this case. Up until this point, photocatalysis has served as a sophisticated method for purification. Thus, the piezoelectric materials became the center of attention in the quest for cutting-edge technologies for water purification. Piezoelectric materials have other potential applications outside of water treatment, including hydrogen production and carbon dioxide adsorption. The lead, barium, KNN, and bismuth perovskite compounds that have seen extensive usage in wastewater treatment are covered in this paper. These materials have the potential to achieve an efficiency of almost 100% when they combine the effects of piezoelectricity with photocatalysis. Consequently, the function of piezoelectric materials in wastewater treatment and the mechanism of piezo-photocatalysis are covered extensively in this paper.</p></div>","PeriodicalId":801,"journal":{"name":"Topics in Catalysis","volume":"67 17-18","pages":"1101 - 1128"},"PeriodicalIF":2.8,"publicationDate":"2024-05-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141169491","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-05-27DOI: 10.1007/s11244-024-01967-z
Hao Liu, Najmeh Zare
In this research, a new non-enzymatic amperometric sensor has been developed for the determination of lactate based on a sepiolite@Pt electrocatalyst. The uniform dispersion of small-sized platinum nanoparticles (NPs) leads to optimized electron transfer kinetics, thereby low lactate detection ability of the modified carbon paste electrode (CPE). The innovative sensing platform demonstrates a linear response to lactate concentrations ranging from 10 to 1100 µM. By using a signal-to-noise ratio of 3σ, a detection limit of 2 µM was established. Moreover, the precise analysis of lactate in human fluids suggests that the proposed method is a highly specific tool for lactate monitoring. Notably, the sensor’s capabilities were extended to include the measurement of lactate concentrations in saliva samples obtained during sport practice. The proposed method offers a cost-effective and efficient means of lactate monitoring, enabling rapid analysis times and streamlined clinical testing procedures.
{"title":"A Novel Clay Based Electrocatalyst for Lactate Detection in Saliva and Blood Samples during Exercise in Athletes","authors":"Hao Liu, Najmeh Zare","doi":"10.1007/s11244-024-01967-z","DOIUrl":"https://doi.org/10.1007/s11244-024-01967-z","url":null,"abstract":"<p>In this research, a new non-enzymatic amperometric sensor has been developed for the determination of lactate based on a sepiolite@Pt electrocatalyst. The uniform dispersion of small-sized platinum nanoparticles (NPs) leads to optimized electron transfer kinetics, thereby low lactate detection ability of the modified carbon paste electrode (CPE). The innovative sensing platform demonstrates a linear response to lactate concentrations ranging from 10 to 1100 µM. By using a signal-to-noise ratio of 3σ, a detection limit of 2 µM was established. Moreover, the precise analysis of lactate in human fluids suggests that the proposed method is a highly specific tool for lactate monitoring. Notably, the sensor’s capabilities were extended to include the measurement of lactate concentrations in saliva samples obtained during sport practice. The proposed method offers a cost-effective and efficient means of lactate monitoring, enabling rapid analysis times and streamlined clinical testing procedures.</p>","PeriodicalId":801,"journal":{"name":"Topics in Catalysis","volume":"129 1","pages":""},"PeriodicalIF":3.6,"publicationDate":"2024-05-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141169490","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-05-23DOI: 10.1007/s11244-024-01972-2
Pho Thi Le, Thi Minh Cao, Tin Chanh Duc Doan, Viet Van Pham
The TiO2 nanomaterial is a traditional photocatalyst that was applied externally in environmental and energy fields. However, a large band gap of TiO2 is a limitation of this material in applications in visible-light regions. Sulfur (S) doped TiO2 nanotubes were synthesized with different weight ratios of the S precursor and TiO2 nanotubes by a thermal diffusion process. Techniques including Fourier transform infrared (FTIR), UV-vis diffuse reflection spectroscopy (DRS), photoluminescence spectroscopy (PL), X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS) were used to confirm the successful doping of the S-TiO2 nanotubes. The treatment of nitrogen oxide (NOx) gas through photocatalysis using S-doped TiO2 nanotubes represents an innovative and environmentally friendly approach. Sulfur doping narrows the band gap of TiO2 nanotubes (from 3.22 to 3.14 eV), allowing for better absorption of visible light. Furthermore, the photocatalytic NOx removal performance of S-TiO2 nanotubes was significantly enhanced with more than 40% NO at 500 ppb, and the efficiency of NO emission decreased significantly after five cycling tests.
{"title":"Treating NOx gas Pollution by Visible Light Photocatalytic Reaction of S-doped TiO2 Nanotubes","authors":"Pho Thi Le, Thi Minh Cao, Tin Chanh Duc Doan, Viet Van Pham","doi":"10.1007/s11244-024-01972-2","DOIUrl":"10.1007/s11244-024-01972-2","url":null,"abstract":"<div><p>The TiO<sub>2</sub> nanomaterial is a traditional photocatalyst that was applied externally in environmental and energy fields. However, a large band gap of TiO<sub>2</sub> is a limitation of this material in applications in visible-light regions. Sulfur (S) doped TiO<sub>2</sub> nanotubes were synthesized with different weight ratios of the S precursor and TiO<sub>2</sub> nanotubes by a thermal diffusion process. Techniques including Fourier transform infrared (FTIR), UV-vis diffuse reflection spectroscopy (DRS), photoluminescence spectroscopy (PL), X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS) were used to confirm the successful doping of the S-TiO<sub>2</sub> nanotubes. The treatment of nitrogen oxide (NO<sub>x</sub>) gas through photocatalysis using S-doped TiO<sub>2</sub> nanotubes represents an innovative and environmentally friendly approach. Sulfur doping narrows the band gap of TiO<sub>2</sub> nanotubes (from 3.22 to 3.14 eV), allowing for better absorption of visible light. Furthermore, the photocatalytic NO<sub>x</sub> removal performance of S-TiO<sub>2</sub> nanotubes was significantly enhanced with more than 40% NO at 500 ppb, and the efficiency of NO emission decreased significantly after five cycling tests.</p></div>","PeriodicalId":801,"journal":{"name":"Topics in Catalysis","volume":"67 17-18","pages":"1129 - 1140"},"PeriodicalIF":2.8,"publicationDate":"2024-05-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141104281","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Herein, we report developing an electrochemical sensor based on a glassy carbon electrode modified by bismuth nanoparticles, graphene oxide, iron oxide, and poly-methyldopa namely Bi@Fe3O4-PMDA/GO/GCE for detecting guanine and adenine. Under optimized conditions (5 μL of Fe3O4-PMDA/GO, 0.5 mg mL−1 of Fe3O4-PMDA/GO solution, water as solvent of Fe3O4-PMDA/GO and acetate buffer (0.1 M, pH 6) as electrolytes), the electrochemical behaviors of guanine and adenine on the prepared modified electrode were investigated by cyclic voltammetry and differential pulse voltammetry. With a high specific surface area and numerous active sites, Bi@Fe3O4-PMDA/GO/GCE exhibited outstanding electrocatalytic properties enabling the determination of guanine and adenine over a wide concentration range with the low detection limit. The Bi@Fe3O4-PMDA/GO/GCE possessed the advantages of simplicity, speed, good sensitivity, and anti-interference performance. Using the DPV method, the resulting sensor exhibited an excellent response with a wide linear ranges from 0.5 to 300 μM for both analytes with LODs 0.027 and 0.032 µM for adenine and guanine, respectively. The designed electrode was satisfactorily employed for the analysis of the real sample. Therefore, Bi@Fe3O4-PMDA/GO/GCE demonstrating sufficient selectivity and sensitivity for the individual and simultaneous study could be applied in widespread fields, including biotechnology or microbiology.