Analyst最新文献_第10页

Recent advances and future prospects in oxidative-reduction low-triggering-potential electrochemiluminescence strategies based on nanoparticle luminophores 基于纳米粒子发光体的氧化还原低触发电位电化学发光策略的最新进展和未来展望

IF 3.6 3区化学

Analyst Pub Date : 2024-11-14 DOI: 10.1039/D4AN01314J

Li Fu, Tianyuan Song, Qi Li, Guizheng Zou, Fuwei Zhang, Zongchao Li, Haotian Guan and Yingshu Guo

{"title":"Recent advances and future prospects in oxidative-reduction low-triggering-potential electrochemiluminescence strategies based on nanoparticle luminophores","authors":"Li Fu, Tianyuan Song, Qi Li, Guizheng Zou, Fuwei Zhang, Zongchao Li, Haotian Guan and Yingshu Guo","doi":"10.1039/D4AN01314J","DOIUrl":"10.1039/D4AN01314J","url":null,"abstract":"The oxidative-reduction electrochemiluminescence (ECL) potential of a luminophore is one of the most significant parameters during light generation processes when considering the growing demand for anti-interference analysis techniques, electrode compatibility and the reduction of damage to biological molecules due to excessive excitation potential. Nanoparticle luminophores, including quantum dots (QDs) and metal nanoclusters (NCs), possess tremendous potential for forming various ECL sensors due to their adjustable surface states. However, few reviews focused on nanoparticle luminophore-based ECL systems for low-triggering-potential (LTP) oxidative-reduction ECL to avoid the possible interference and oxidative damage of biological molecules. This review summarizes the recent advances in the LTP oxidative-reduction ECL potential strategy with nanoparticle luminophores as ECL emitters, including matching efficient coreactants and nanoparticle luminophores, doping nanoparticle luminophores, constructing donor–acceptor systems, choosing suitable working electrodes, combining multiplex nanoparticle luminophores, and employing surface-engineering strategies. In the context of the different LTP ECL systems, potential-lowering strategies and bio-related applications are discussed in detail. Additionally, the future trends and challenges of low ECL-triggering-potential strategies are discussed.","PeriodicalId":63,"journal":{"name":"Analyst","volume":" 1","pages":" 34-45"},"PeriodicalIF":3.6,"publicationDate":"2024-11-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142609933","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}

引用次数: 0

Tuning the electro-catalytic activity of the Zn–Cu MOF/rGO nanocomposite as a novel enzyme-free electrochemical sensor for the detection of the oxytocin hormone† 调节 Zn-Cu MOF/rGO 纳米复合材料的电催化活性，将其作为检测催产素激素的新型无酶电化学传感器

IF 3.6 3区化学

Analyst Pub Date : 2024-11-14 DOI: 10.1039/D4AN01157K

Md Zainul Abedeen, Manish Sharma, Himmat Singh Kushwaha and Ragini Gupta

{"title":"Tuning the electro-catalytic activity of the Zn–Cu MOF/rGO nanocomposite as a novel enzyme-free electrochemical sensor for the detection of the oxytocin hormone†","authors":"Md Zainul Abedeen, Manish Sharma, Himmat Singh Kushwaha and Ragini Gupta","doi":"10.1039/D4AN01157K","DOIUrl":"10.1039/D4AN01157K","url":null,"abstract":"Oxytocin (OXY), a peptide hormone and neurotransmitter essential for biological processes with nine distinct amino acid residues, has received significant attention due to its illegal use in food adulteration and stimulating milk ejection in cattle. Herein, for the first time, electrochemical detection of oxytocin (OXY) is reported using a novel nanocomposite consisting of a Zn–Cu metal–organic framework (Zn–Cu MOF) decorated on reduced graphene oxide (rGO). An octahedral surface morphology with a crystalline structure of 45 nm in size, formation of a metal–oxygen bond, an enhanced pore diameter of 6.8 nm, a specific surface area of 70.8 m2 g−1, and a pore volume of 0.08 cm3 g−1 were revealed by different characterization techniques. The electro-catalytic activity of the Zn–Cu MOF/rGO nanocomposite increased substantially owing to the synergistic effect, which is evident from cyclic voltammetry (CV) when compared to those of the Zn-MOF, the Cu-MOF, Zn MOF/rGO, Cu MOF/rGO, and Zn–Cu MOF, keeping other parameters the same. Moreover, the electrochemical impedance spectroscopy (EIS) spectra reveal the excellent conductivity of the nanocomposite. The experimental parameters, viz. electrolyte pH (5), supporting electrolyte (0.1 M ABS), and volume of coating (12 μL), were optimized. The differential pulse voltammetry (DPV) technique was adopted to determine the OXY with the lowest limit of detection (LOD) of 1.1 nM (S/N = 3) with a linear range of 40–400 nM. The analytical application of the modified electrode was examined by spiking OXY in pasteurized toned milk, skimmed powder milk, animal milk, and RO water, with a good recovery range of 95–106%.","PeriodicalId":63,"journal":{"name":"Analyst","volume":" 1","pages":" 154-167"},"PeriodicalIF":3.6,"publicationDate":"2024-11-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142610027","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}

引用次数: 0

Real-time monitoring of vancomycin using a split-aptamer surface plasmon resonance biosensor† 利用分裂aptamer表面等离子体共振生物传感器实时监测万古霉素

IF 3.6 3区化学

Analyst Pub Date : 2024-11-14 DOI: 10.1039/D4AN01226G

Cátia Santa, Soohyun Park, Artur Gejt, Heather A. Clark, Bastian Hengerer and Khulan Sergelen

{"title":"Real-time monitoring of vancomycin using a split-aptamer surface plasmon resonance biosensor†","authors":"Cátia Santa, Soohyun Park, Artur Gejt, Heather A. Clark, Bastian Hengerer and Khulan Sergelen","doi":"10.1039/D4AN01226G","DOIUrl":"10.1039/D4AN01226G","url":null,"abstract":"Real-time monitoring of therapeutic drugs is crucial for treatment management and pharmacokinetic studies. We present the optimization and affinity tuning of split-aptamer sandwich assay for real-time monitoring of the narrow therapeutic window drug vancomycin, using surface plasmon resonance (SPR). To achieve reversible, label-free sensing of small molecules by SPR, we adapted a vancomycin binding aptamer in a sandwich assay format through the split-aptamer approach. By evaluating multiple split sites within the secondary structure of the original aptamer, we identified position 27 (P27) as optimal for preserving target affinity, ensuring reversibility, and maximizing sensitivity. The assay demonstrated robust performance under physiologically relevant ranges of pH and divalent cations, and the specific ternary complex formation of the aptamer split segments with the analyte was confirmed by circular dichroism spectroscopy. Subsequently, we engineered a series of split-aptamer pairs with increasing complementarity in the stem regions, improving both the affinity and limit of detection up to 10-fold, as compared to the primary P27 pair. The kinetics of the engineered split-aptamer pairs were evaluated, revealing fast association and dissociation rates, confirming improved affinity and detection limits across variants. Most importantly, the reversibility of the assay, essential for real-time monitoring, was maintained in all pairs. Finally, the assay was further validated in complex biological matrices, including the cerebrospinal fluid from dogs and diluted plasma from rats, demonstrating functionality in biological environments and stability exceeding 9 hours. Our study paves the way for applications of split-aptamers in real-time monitoring of small molecules, with potential implications for in vivo therapeutic drug monitoring and pharmacokinetic studies.","PeriodicalId":63,"journal":{"name":"Analyst","volume":" 1","pages":" 131-141"},"PeriodicalIF":3.6,"publicationDate":"2024-11-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.rsc.org/en/content/articlepdf/2025/an/d4an01226g?page=search","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142609905","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Green one-step pyrolytic synthesis of folic acid-derived carbon dots for sensitive turn-on fluorescence detection of cysteine† 一步绿色热解合成叶酸衍生碳点，用于半胱氨酸的灵敏荧光检测

IF 3.6 3区化学

Analyst Pub Date : 2024-11-13 DOI: 10.1039/D4AN01144A

Jie Huang, Ruicheng Xu, Qiaoting Yang, Kang Tao and Dan Shan

引用次数: 0

Towards high-resolution water isotope analysis in ice cores using laser ablation – cavity ring-down spectroscopy† 利用激光烧蚀-空腔环向下光谱技术实现冰芯中水同位素的高分辨率分析

IF 3.6 3区化学

Analyst Pub Date : 2024-11-12 DOI: 10.1039/D4AN01054J

Eirini Malegiannaki, Pascal Bohleber, Daniele Zannoni, Ciprian Stremtan, Agnese Petteni, Barbara Stenni, Carlo Barbante, Bo M. Vinther and Vasileios Gkinis

{"title":"Towards high-resolution water isotope analysis in ice cores using laser ablation – cavity ring-down spectroscopy†","authors":"Eirini Malegiannaki, Pascal Bohleber, Daniele Zannoni, Ciprian Stremtan, Agnese Petteni, Barbara Stenni, Carlo Barbante, Bo M. Vinther and Vasileios Gkinis","doi":"10.1039/D4AN01054J","DOIUrl":"10.1039/D4AN01054J","url":null,"abstract":"A new micro-destructive technique for high-resolution water isotope analysis of ice samples using a Laser Ablation (LA) system coupled with a Cavity Ring Down Spectrometer (CRDS) is presented. This method marks the first time water isotope analysis is conducted directly on the ice, bypassing the traditional steps of melting and vaporizing the ice sample, thanks to the direct transition of ice into water vapour through the laser ablation process. A nanosecond ArF laser ablation system (193 nm) with an integrated two-volume ablation chamber was successfully coupled to a CRDS analyzer, utilizing nitrogen as the carrier gas. The application goal is the use of LA-CRDS for ice core studies, so a method for preparing ice standard samples using liquid water isotope standards, widely used for ice core analysis, is introduced. The measurements were conducted in a discrete mode, by performing laser ablation raster scans of 4 mm × 4 mm areas, establishing a sampling resolution of 4 mm along an ice core's depth. The water vapour concentration reaching the CRDS analyzer as well as the quality of the water isotopic measurements of δ18O and δD were influenced by laser parameters, such as laser spot size, repetition rate, laser fluence, ablation time as well as by the flow rates of the carrier gas. After optimizing the experimental conditions for water vapour formation, three ice standards samples were analyzed for calibration purposes on the VSMOW-SLAP scale and a section of an ice core sample was also tested. Critical parameters influencing the precision and accuracy of water isotopic measurements were investigated, and isotopic fractionation phenomena were identified, pointing to essential considerations for the technique's further development.","PeriodicalId":63,"journal":{"name":"Analyst","volume":" 24","pages":" 5843-5855"},"PeriodicalIF":3.6,"publicationDate":"2024-11-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.rsc.org/en/content/articlepdf/2024/an/d4an01054j?page=search","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142600047","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Rapid lung ventilation MRI using parahydrogen-induced polarization of propane gas† 利用丙烷气体的对氢诱导极化实现快速肺通气磁共振成像

IF 3.6 3区化学

Analyst Pub Date : 2024-11-12 DOI: 10.1039/D4AN01029A

Md Raduanul H. Chowdhury, Clementinah Oladun, Nuwandi M. Ariyasingha, Anna Samoilenko, Tarek Bawardi, Dudari B. Burueva, Oleg G. Salnikov, Larisa M. Kovtunova, Valerii I. Bukhtiyarov, Zhongjie Shi, Kehuan Luo, Sidhartha Tan, Juri G. Gelovani, Igor V. Koptyug, Boyd M. Goodson and Eduard Y. Chekmenev

{"title":"Rapid lung ventilation MRI using parahydrogen-induced polarization of propane gas†","authors":"Md Raduanul H. Chowdhury, Clementinah Oladun, Nuwandi M. Ariyasingha, Anna Samoilenko, Tarek Bawardi, Dudari B. Burueva, Oleg G. Salnikov, Larisa M. Kovtunova, Valerii I. Bukhtiyarov, Zhongjie Shi, Kehuan Luo, Sidhartha Tan, Juri G. Gelovani, Igor V. Koptyug, Boyd M. Goodson and Eduard Y. Chekmenev","doi":"10.1039/D4AN01029A","DOIUrl":"10.1039/D4AN01029A","url":null,"abstract":"Proton-hyperpolarized contrast agents are attractive because they can be imaged on virtually any clinical MRI scanner, which is typically equipped to scan only protons rather than heteronuclei (i.e., anything besides protons, e.g., 13C, 15N, 129Xe, 23Na, etc.). Even though the lifetime of the proton spin hyperpolarization is only a few seconds, it is sufficient for inhalation and scanning of proton-hyperpolarized gas media. We demonstrate the utility of producing hyperpolarized propane gas via heterogeneous parahydrogen-induced polarization for the purpose of ventilation imaging in an excised rabbit lung model. The magnetization of protons in hyperpolarized propane gas is similar to that of tissue water protons, making it possible to rapidly perform lung ventilation imaging with a 0.35 T clinical MRI scanner. Here, we demonstrate the feasibility of rapid (2 s) lung ventilation MRI in excised rabbit lungs using hyperpolarized propane gas with a 1 × 1 mm2 pixel size using a 50 mm slice thickness, and a 1.7 × 1.7 mm2 pixel size using a 9 mm slice thickness.","PeriodicalId":63,"journal":{"name":"Analyst","volume":" 24","pages":" 5832-5842"},"PeriodicalIF":3.6,"publicationDate":"2024-11-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.rsc.org/en/content/articlepdf/2024/an/d4an01029a?page=search","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142600048","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Electrochemically modulated surface plasmon waves for characterization and interrogation of DNA-based sensors† 电化学调制表面等离子体波用于鉴定和检测 DNA 传感器

IF 3.6 3区化学

Analyst Pub Date : 2024-11-12 DOI: 10.1039/D4AN01164C

Anil Sharma, Thomas Hulse, Aymen H. Qatamin, Monica Moreno, Klester S. Souza, Marcelo B. Pereira, Fabricio S. Campos, Leandro B. Carneiro, Antonio M. H. de Andrade, Paulo M. Roehe, Flavio Horowitz and Sergio B. Mendes

{"title":"Electrochemically modulated surface plasmon waves for characterization and interrogation of DNA-based sensors†","authors":"Anil Sharma, Thomas Hulse, Aymen H. Qatamin, Monica Moreno, Klester S. Souza, Marcelo B. Pereira, Fabricio S. Campos, Leandro B. Carneiro, Antonio M. H. de Andrade, Paulo M. Roehe, Flavio Horowitz and Sergio B. Mendes","doi":"10.1039/D4AN01164C","DOIUrl":"10.1039/D4AN01164C","url":null,"abstract":"This work reports on a comparative analysis of electrical and optical measurements for structural characterization and for assessing signal transduction performance of a redox-labeled DNA-based sensing platform. We conducted complementary investigations employing conventional electrochemical techniques with electric current measurements in cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS) and confronted those results with optical measurements using surface plasmon waves while the redox assembly was undergoing similar electrochemical modulation as in the electrical CV and EIS measurements. The specific sensor configuration deployed here was composed of a methylene blue (MB)-modified single-stranded DNA (ssDNA) signaling probe and an unlabeled capture ssDNA probe that complements the signaling probe. Two types of signaling probes were employed: one with MB attached to the 3′ end, which positions the redox marker closer to the electrode surface upon hybridization with the capture probe, and the other with MB attached to the 5′ end, which places the redox marker farther from the electrode surface. For each molecular assembly and for each electrochemical modulation protocol, both the electrical and optical experimental data were quantitatively analyzed to determine the surface density of electro-active species and the rate of electron transfer between the redox marker and the electrode surface. Our experimental results highlight the consistency of the confronted methodologies and indicate that optical impedance spectroscopy utilizing electrochemically modulated surface plasmon waves, which is a transduction protocol immune from non-faradaic interferents that invariably are present in the electrical methodology, can provide a powerful route for developing a redox-labeled DNA-hybridization biosensing strategy.","PeriodicalId":63,"journal":{"name":"Analyst","volume":" 24","pages":" 5821-5831"},"PeriodicalIF":3.6,"publicationDate":"2024-11-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142600050","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}

引用次数: 0

A near-infrared frequency upconversion fluorescent probe for rapid and sensitive visual detection of sulfur dioxide† 用于快速灵敏目测检测二氧化硫的近红外频率上转换荧光探针

IF 3.6 3区化学

Analyst Pub Date : 2024-11-12 DOI: 10.1039/D4AN01269K

Hong Zeng, Xiao Ma, Shufen Pan, Yuting Han, Yanyan Tang, Yulan Fan and Yongquan Wu

{"title":"A near-infrared frequency upconversion fluorescent probe for rapid and sensitive visual detection of sulfur dioxide†","authors":"Hong Zeng, Xiao Ma, Shufen Pan, Yuting Han, Yanyan Tang, Yulan Fan and Yongquan Wu","doi":"10.1039/D4AN01269K","DOIUrl":"10.1039/D4AN01269K","url":null,"abstract":"Inflammation is a complex physiological response involving various cellular and molecular events. Sulfur dioxide (SO2), which is usually in the form of HSO3− and SO32− under physiological conditions, plays a crucial role in the regulation of inflammation and diseases. Frequency upconversion luminescence (FUCL) can realize the unique anti-Stokes process of long-wavelength excitation to short-wavelength emission; thus, it is a highly promising optical method for in vivo imaging due to its deep tissue penetration, low photo-damage, etc. Therefore, we developed a near-infrared FUCL NIRX-1 probe for the detection of HSO3−. NIRX-1 had a fast response (80 s), a low detection limit (0.43 μM), and high selectivity towards HSO3−. In addition, NIRX-1 had deep light penetration ability due to the near-infrared excitation at 808 nm and was able to detect HSO3− in living cells and mice. Lastly, NIRX-1 was employed in the imaging of HSO3− in an inflammation mouse model through FUCL imaging techniques. All these features make NIRX-1 a good candidate for the investigation of SO2-associated physiological and pathological processes.","PeriodicalId":63,"journal":{"name":"Analyst","volume":" 24","pages":" 5791-5799"},"PeriodicalIF":3.6,"publicationDate":"2024-11-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142600051","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}

引用次数: 0

A novel light-harvesting ZIF-9-TCPP as a promising FRET-based ratiometric fluorescence probe for sperm mobility† 一种新型光收集 ZIF-9-TCPP 作为基于 FRET 的比率荧光探针，有望用于检测精子的流动性

IF 3.6 3区化学

Analyst Pub Date : 2024-11-11 DOI: 10.1039/D4AN01305K

Yi-Xuan Li, Yu-Xuan Dai, Ju-Zheng Wang, Jérome Chauvin, Xue-Ji Zhang, Serge Cosnier, Robert S. Marks and Dan Shan

{"title":"A novel light-harvesting ZIF-9-TCPP as a promising FRET-based ratiometric fluorescence probe for sperm mobility†","authors":"Yi-Xuan Li, Yu-Xuan Dai, Ju-Zheng Wang, Jérome Chauvin, Xue-Ji Zhang, Serge Cosnier, Robert S. Marks and Dan Shan","doi":"10.1039/D4AN01305K","DOIUrl":"10.1039/D4AN01305K","url":null,"abstract":"The concentration of zinc ions in semen is significantly correlated with sperm viability and male fertility. In this work, a reliable ratiometric fluorescence probe (ZIF-9-TCPP) based on the efficient Förster resonance energy transfer (FRET) process between two luminophores, benzimidazole (BIM) and meso-tetra (4-carboxyphenyl) porphyrin (TCPP) for Zn2+ detection has been constructed, where the emissions of BIM and TCPP are used as reference and detection signals. The proximity of BIM and TCPP in one framework (ZIF-9-TCPP) and the overlapped spectra between BIM and TCPP afford the attainment of a highly efficient FRET (around 90% efficiency). Efficient FRET improves the fluorescence intensity of porphyrin to enhance the sensitivity of detection. The unique spectral shift resulting from Zn2+ binding to the porphyrin ring ensures the selectivity of detection. In addition, the response mechanism of the proposed ratiometric probes to Zn2+ has been investigated. This work provides a convenient way to design an efficient FRET system and a promising method for sperm mobility detection.","PeriodicalId":63,"journal":{"name":"Analyst","volume":" 24","pages":" 5784-5790"},"PeriodicalIF":3.6,"publicationDate":"2024-11-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142597972","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}

引用次数: 0

α-MnO2 catalysts with efficient ozone-catalyzed decomposition under high humidity conditions† 高湿度条件下具有高效臭氧催化分解能力的 α-MnO2 催化剂

IF 3.6 3区化学

Analyst Pub Date : 2024-11-07 DOI: 10.1039/D4AN01095G

Jiafan Ji, Qianqian Yan, Yi Chen, Gaosheng Zhao, Bin Jia, Li Xu and Ping Cheng

{"title":"α-MnO2 catalysts with efficient ozone-catalyzed decomposition under high humidity conditions†","authors":"Jiafan Ji, Qianqian Yan, Yi Chen, Gaosheng Zhao, Bin Jia, Li Xu and Ping Cheng","doi":"10.1039/D4AN01095G","DOIUrl":"10.1039/D4AN01095G","url":null,"abstract":"Ground-level ozone pollution poses significant risks to ecosystems and human health and requires effective control measures. This study focused on the monolithic ozone degradation catalyst based on powdered α-MnO2 and comprehensively investigated its catalytic performance, moisture resistance, and stability. The monolithic catalyst achieved the optimal catalytic activity with an ozone conversion rate of 99% after being calcined at 400 °C for 3 hours. The detailed characterization of the catalyst properties at pH = 1, 4, and 7 revealed the adverse effects of residual acid ions on the catalyst activity. The catalyst at pH = 7 had more oxygen vacancies, which was related to the reduction of sulfate ion residues and the exposure of more active sites during the washing process. At pH = 7 and a space velocity of 900 000 h−1, the conversion rates of α-MnO2 to 18 ppm ozone reached 100% and 95% within 3 hours under 90% relative humidity and dry conditions, respectively. In addition, the monolithic catalyst exhibited significant moisture resistance and performed well in continuous alternating humidity cycle tests and sustained high humidity. It still maintained 90% ozone decomposition efficiency after 3 hours of testing under high humidity conditions. Meanwhile, the α-MnO2 monolithic catalyst showed excellent stability, with an ozone conversion rate exceeding 99% during the 50 – hour test period. These findings highlight the great potential of the α-MnO2 monolithic catalyst in ozone removal applications.","PeriodicalId":63,"journal":{"name":"Analyst","volume":" 1","pages":" 197-206"},"PeriodicalIF":3.6,"publicationDate":"2024-11-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142594310","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}

引用次数: 0