Chemical Papers最新文献_第9页

Exploring the efficacy of eggshell and its pyrolyzed products for ciprofloxacin removal with machine learning insights 用机器学习方法探索蛋壳及其热解产物去除环丙沙星的功效

IF 2.2 4区化学

Chemical Papers Pub Date : 2024-09-19 DOI: 10.1007/s11696-024-03687-w

Md. Rezwanul Islam, Qingyue Wang, Sumaya Sharmin, Weiqian Wang

{"title":"Exploring the efficacy of eggshell and its pyrolyzed products for ciprofloxacin removal with machine learning insights","authors":"Md. Rezwanul Islam, Qingyue Wang, Sumaya Sharmin, Weiqian Wang","doi":"10.1007/s11696-024-03687-w","DOIUrl":"10.1007/s11696-024-03687-w","url":null,"abstract":"<div>This study investigated the efficacy of utilizing eggshells and their pyrolyzed derivatives, within the temperature range of 400–800 °C, as adsorbents for ciprofloxacin (CIP) removal. Experimental data were analyzed using various machine learning (ML) algorithms, viz. linear regression, random forest, support vector machines, decision trees, and k-nearest neighbor to predict performance. Results demonstrated that pyrolyzed eggshells at 600 °C (PES-600) exhibited the highest CIP removal rate (86.06 ± 2.25%). Optimal performance was consistently observed at an initial CIP concentration of 125 mg/L, with the order of PES-600 > PES-500 > PES-400 > PES-700 > eggshells > PES-800. Adsorption capacity peaked at pH 5 (5.84 ± 0.1 mg/g), attributed to interactions including hydrogen bonding, π–π interaction, and ion exchange. Scanning electron microscope images revealed that PES-600 had the highest number of pores, resulting in a smoother surface post-adsorption. Langmuir isotherm model fitting was best for ES, PES-700, and PES-800, while Freundlich isotherm was suitable for PES-400, PES-500, and PES-600. PES-600 showed the best fit with the pseudo-second-order kinetic model. Characterization analysis highlighted the significance of functional groups like C = O, C = C, and –CH groups in aromatic rings. ML algorithms demonstrated remarkable performance with an accuracy level of 90.28%. In conclusion, pyrolyzed eggshells can effectively remove ciprofloxacin (CIP) from wastewater, with optimal performance predicted by the random forest machine learning algorithm when considering real environmental factors.</div>","PeriodicalId":513,"journal":{"name":"Chemical Papers","volume":"78 15","pages":"8433 - 8447"},"PeriodicalIF":2.2,"publicationDate":"2024-09-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142264945","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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

Synthesis of quinazoline derivatives with new phenolic moieties: in vitro and in silico evaluations as alternative polyphenol oxidase inhibitors 具有新酚类分子的喹唑啉衍生物的合成：作为替代性多酚氧化酶抑制剂的体外和硅学评估

IF 2.2 4区化学

Chemical Papers Pub Date : 2024-09-19 DOI: 10.1007/s11696-024-03670-5

Cansu Öztürk, Feyzi Sinan Tokali, Aykut Öztekin, Erbay Kalay, Yalçın Karagöz, Mine Aksoy

{"title":"Synthesis of quinazoline derivatives with new phenolic moieties: in vitro and in silico evaluations as alternative polyphenol oxidase inhibitors","authors":"Cansu Öztürk, Feyzi Sinan Tokali, Aykut Öztekin, Erbay Kalay, Yalçın Karagöz, Mine Aksoy","doi":"10.1007/s11696-024-03670-5","DOIUrl":"10.1007/s11696-024-03670-5","url":null,"abstract":"<div>Several novel quinazoline derivatives bearing phenolic hydroxyl moiety (2–7) have been produced with good yields and screened for biological activities. All the title compounds were characterized using spectroscopic techniques such as 1H NMR, 13C NMR, FTIR, and HRMS. Then, the anti-browning effects of synthesized quinazoline derivatives were investigated in vitro. The IC50 values for molecules 2–7 were calculated as 0.085, 1.145, 0.106, 6.86, 0.52, 7.07 µM, respectively. Ki constants, which are inhibitory-enzyme binding constants, were calculated by using Lineweaver–Burk graphs as 0.16 ± 0.0620, 0.906 ± 0.3029, 0.055 ± 0.0171, 9.363 ± 2.5809, 0.773 ± 0.3204, 7.863 ± 1.9107 µM, respectively. In computer-aided analysis, to gain insights electrochemical properties, synthesized compounds were analysed theoretically by density functional theory. Molecular docking studies and MD simulations were performed to identify possible inhibitor-enzyme binding interactions. According to obtained results, all the compounds formed hydrogen bonds with Asn 112 and Asn 414, and showed π-cation interaction with Phe2 70, gatekeeper residue in target protein. Supporting the nm level inhibition, MD simulations indicate that protein-inhibitor complex maintain the stability and have high number of hydrogen bond formation during the simulation.</div>","PeriodicalId":513,"journal":{"name":"Chemical Papers","volume":"78 15","pages":"8321 - 8332"},"PeriodicalIF":2.2,"publicationDate":"2024-09-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142412606","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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

On the energy transfer in Bi2WO6: ERedOx-assisted radiative recombination in O2 and ROS sensing. prospective Bi2WO6中的能量转移：O2和ROS传感中的ERedOx辅助辐射重组。展望

IF 2.2 4区化学

Chemical Papers Pub Date : 2024-09-19 DOI: 10.1007/s11696-024-03692-z

Oswaldo Núñez, Lorean Madriz, Ronald Vargas

{"title":"On the energy transfer in Bi2WO6: ERedOx-assisted radiative recombination in O2 and ROS sensing. prospective","authors":"Oswaldo Núñez, Lorean Madriz, Ronald Vargas","doi":"10.1007/s11696-024-03692-z","DOIUrl":"10.1007/s11696-024-03692-z","url":null,"abstract":"<div>Photoluminescence maximum emission signal of colloids based on Bi2WO6 suspended in an aqueous solution is blue-shifted as compared to its band gap according to Eg + (ERedOx-ECB). This process involves the exergonic non-radiative transfer of ECB electron to ERedOx and the concomitant radiative emission of a second electron that has gained ERedOx-ECB energy presumably by electrons energy levels entanglement induced via simultaneous light excitement of multiple electrons. These results constitute evidence for energy transfer with application in sensing electrolyte-electron-acceptors as reactive oxygen species that may be implemented for example in cancer and aortic dissection detection and treatment.<h3>Graphical abstract</h3>Bi2WO6 electrons from water colloidal solution are entangled by light (Plasmon resonance) and excited from the Bi2WO6 valence band (VB) to its conduction band (CB). Electron 1 moves up the gradient at the surface and is transferred to the acceptor (ERedOx) at the electrolyte. The gained energy, ERedOx—ECb, is transferred to electron 2 via their entangled energy levels. Electron 2 then decays to the VB emitting light at the Bi2WO6 band gap (Eg) plus the energy gained. Sensing of the ERedOx and [RedOx] is then obtained.\u0000<div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":513,"journal":{"name":"Chemical Papers","volume":"78 15","pages":"8523 - 8529"},"PeriodicalIF":2.2,"publicationDate":"2024-09-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142412548","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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

Exergy analysis of flare gas recovery processes using steam and power generation systems 利用蒸汽和发电系统进行火炬气回收过程的能效分析

IF 2.2 4区化学

Chemical Papers Pub Date : 2024-09-18 DOI: 10.1007/s11696-024-03666-1

Elmira Touri Oqani, Hossein Sakhaeinia, Vahid Pirouzfar, Amir Heydarinasab

{"title":"Exergy analysis of flare gas recovery processes using steam and power generation systems","authors":"Elmira Touri Oqani, Hossein Sakhaeinia, Vahid Pirouzfar, Amir Heydarinasab","doi":"10.1007/s11696-024-03666-1","DOIUrl":"10.1007/s11696-024-03666-1","url":null,"abstract":"<div>The protection of the environment is considered to be a major concern of industrial units today. Flare gas combustion systems are inappropriate as a disposal solution or safety measure to decrease pressure. The oil, gas, and petrochemical industries are also concerned about reducing greenhouse gas emissions. Flare gases are associated with non-renewable fossil energies, which have also increased due to the ever-increasing need to harvest underground sources of flare gases. Accumulation of these gases is caused by other reasons such as unburned process gas, excess gas, exhaust gas from units during repairs, technical defects, change of feed, shutdown, and start-up, etc. Research is necessary to collect information regarding revisions to the prevention of burning gases. Identifying the location of energy quality losses, both quantitatively and qualitatively, is the first step in optimizing industrial units. The term “exergy quality” is used to express the amount of exergy loss resulting from exergy analysis. It is possible to determine the critical point of energy loss in a unit by measuring the energy loss in each device, which contributes to increased efficiency. The purpose of this study is to use exergy analysis in order to optimize the recovery of flare gas, which is a form of non-renewable energy. To analyze the exergy of all process equipment, high-pressure steam generation, steam turbine, heat and power generation, and combined cycle processes are selected. According to the literature review, the combined cycle provides the highest rate of electricity recovery. In addition, the exergy analyses of the four processes above are compared, and necessary modifications are made to improve them and the results of economic calculation are presented. The results represented that the highest exergy loss of heat exchangers is equal to 25,776 (kj/kgmole), 26,538.5 (kj/kgmole), 25,776 (kj/kgmole), and 625,828.5 (kj/kgmole) in the processes, respectively.</div>","PeriodicalId":513,"journal":{"name":"Chemical Papers","volume":"78 15","pages":"8271 - 8283"},"PeriodicalIF":2.2,"publicationDate":"2024-09-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142264944","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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

Investigation of antibacterial potential of Actinomycetales isolated from hot springs in India through a combined analysis involving in vitro and computational methods 通过体外和计算方法的综合分析，研究从印度温泉中分离出来的放线菌的抗菌潜力

IF 2.2 4区化学

Chemical Papers Pub Date : 2024-09-18 DOI: 10.1007/s11696-024-03689-8

Aparana Kumari, B. Stany, Shatakshi Mishra, Ridhima Biswas, Angad Bakshi, B. Abhrajit, K. V. Bhaskara Rao

{"title":"Investigation of antibacterial potential of Actinomycetales isolated from hot springs in India through a combined analysis involving in vitro and computational methods","authors":"Aparana Kumari, B. Stany, Shatakshi Mishra, Ridhima Biswas, Angad Bakshi, B. Abhrajit, K. V. Bhaskara Rao","doi":"10.1007/s11696-024-03689-8","DOIUrl":"10.1007/s11696-024-03689-8","url":null,"abstract":"<div>Actinobacteria emerge as significant producers of bioactive compounds. These compounds exhibit diverse beneficial properties, such as antioxidative, anti-inflammatory, anticancer, antimicrobial, and antiviral attributes. Hot springs, with their high temperatures and unique geochemical conditions, serve as fascinating ecosystems harboring diverse microbial life. In these environments, actinomycetes thrive, utilizing the available organic matter and nutrients. The extreme conditions, characterized by high temperatures and pH levels, likely exert selective pressure, favoring the survival of resilient microorganisms like actinomycetes. This study specifically identified Actinomycetales bacterium spp. (Genbank ID: OP863023), isolated from Rajgir hot spring, as a noteworthy producer of a brown pigment at 43 °C. This isolated strain is known to produce various metabolites identified through GC–MS analysis. Following ADME/T screening of all the metabolites, Diethyl Phthalate (DEP) stands out among those produced by the Actinomycetales bacterium species. The isolated strain demonstrated in vitro antibacterial activity, inhibiting Listeria monocytogenes MTCC1143 with a 10-mm zone of inhibition, while the reference Ampicillin disc showed a 15 mm inhibition zone. In the in silico analysis targeting the Internalin A protein of L. monocytogenes, the Actinomycetales-produced compound DEP displayed an inhibition potential of − 5.4 kcal/Mol, while the reference drug Ampicillin exhibited a higher inhibition potential of − 7.4 kcal/Mol. These findings suggest that the isolated actionobacteria holds promise for antibacterial applications, particularly against L. monocytogenes.</div>","PeriodicalId":513,"journal":{"name":"Chemical Papers","volume":"78 15","pages":"8449 - 8463"},"PeriodicalIF":2.2,"publicationDate":"2024-09-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142265076","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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

An electrochemical biosensor to detect anti-asparaginase antibodies using immobilized ASNase on carbon-printed electrodes 利用固定在碳印电极上的 ASNase 检测抗天冬酰胺酶抗体的电化学生物传感器

IF 2.2 4区化学

Chemical Papers Pub Date : 2024-09-17 DOI: 10.1007/s11696-024-03681-2

Jocimara C. da Silva, Bruna Bragantin, Augusto Etchegaray, Jose A. Yunes, Ruchi Gupta, Renata K. Mendes

{"title":"An electrochemical biosensor to detect anti-asparaginase antibodies using immobilized ASNase on carbon-printed electrodes","authors":"Jocimara C. da Silva, Bruna Bragantin, Augusto Etchegaray, Jose A. Yunes, Ruchi Gupta, Renata K. Mendes","doi":"10.1007/s11696-024-03681-2","DOIUrl":"10.1007/s11696-024-03681-2","url":null,"abstract":"<div>Acute lymphoblastic leukaemia (ALL) is one of the most common types of childhood cancer. Treatment of ALL may involve using the enzyme L-asparaginase (ASNase) from Escherichia coli as the first option. However, native E. coli ASNase can induce the production of antibodies, interfering with its pharmacological activity and increasing the risk of allergic reactions. Therefore, monitoring the production of anti-ASNase antibodies in patients is essential for determining treatment efficacy. Hence, a simple, precise, and selective method for the measurement of antibodies is of great interest. In this context, this work reports on an electrochemical biosensor based on carbon-printed electrodes to quantify antibodies in ALL patients under treatment using an ASNase-based protocol. For selective detection of anti-ASNase antibodies, ASNase was immobilized on electrodes using the nanocomposite Fe3O4/chitosan. The biosensor showed linearity for the antibody concentrations between 0.1 and 10 µg mL−1, with a limit of detection of 150 ng L−1. In addition, the biosensor was selective and provided reproducible results with a variability of 3.3%. From these results, it was concluded that the biosensor presented here is a promising device for the measurement of anti-ASNase antibodies produced in patients under treatment for ALL.<h3>Graphical abstract</h3>\u0000<div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":513,"journal":{"name":"Chemical Papers","volume":"78 15","pages":"8409 - 8416"},"PeriodicalIF":2.2,"publicationDate":"2024-09-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142264844","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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

Sunlight-driven charge separation for a heterojunction of nano-pyramidal CuWO4-MOF modified TiO2 nanoflakes for photocatalytic degradation of ciprofloxacin 用于光催化降解环丙沙星的纳米金字塔形 CuWO4-MOF 修饰 TiO2 纳米薄片异质结的阳光驱动电荷分离技术

IF 2.2 4区化学

Chemical Papers Pub Date : 2024-09-16 DOI: 10.1007/s11696-024-03686-x

Kgaugelo S. Mabape, Shivani B. Mishra, Ajay K. Mishra, Makwena J. Moloto

{"title":"Sunlight-driven charge separation for a heterojunction of nano-pyramidal CuWO4-MOF modified TiO2 nanoflakes for photocatalytic degradation of ciprofloxacin","authors":"Kgaugelo S. Mabape, Shivani B. Mishra, Ajay K. Mishra, Makwena J. Moloto","doi":"10.1007/s11696-024-03686-x","DOIUrl":"10.1007/s11696-024-03686-x","url":null,"abstract":"<div>The study presents a breakthrough of a balanced charge separation for heterojunction CuWO4-TiO2 cocatalyst to efficiently enhance visible light photocatalytic degradation of ciprofloxacin (CIP). A solvothermal-synthesized nanopyramid-like CuWO4 semiconductor was assembled before sol–gel treatment with TiO2 precursors to generate CuWO4-TiO2 nanocomposites. The optical, structural, and morphological properties of CuWO4-TiO2 were elucidated using UV–Vis DRS, XRD, FTIR, Raman spectroscopy, and TEM/SEM techniques. The UV–Vis DRS spectroscopy of as-synthesized CuWO4-TiO2 cocatalyst demonstrated enhanced visible light absorbance. The XRD patterns of CuWO4-TiO2 revealed a triclinic phase nanocrystal. The O-Ti–O functionality was confirmed by FTIR spectroscopy. The photoactive bands corresponding to anatase redshift were observed from Raman spectroscopy of CuWO4-TiO2 nanocomposite. The PL studies attributed this redshift to the elevated extra energy bands that aid electron/hole pair charge separation in a co-catalyst heterojunction CuWO4-TiO2 nanocomposite afforded by embedding CuWO4-MOF within TiO2 crystalline. The TEM showed that un-sintered CuWO4.MOF mimicked a pyramidal shape and converted to nanoflakes upon sintering, while TiO2 and CuWO4-TiO2 retained a tetragonal shape. The photocatalytic activity of CuWO4-TiO2 cocatalyst was studied using CIP, as a model pollutant. The innovative design of 5CuWO4-TiO2 charge separation nanocomposite completely degraded 10 mg L−1 CIP solution at pH = 6.31 (natural pH) and 9 under 120 min of sunlight irradiation.</div>","PeriodicalId":513,"journal":{"name":"Chemical Papers","volume":"78 15","pages":"8417 - 8432"},"PeriodicalIF":2.2,"publicationDate":"2024-09-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s11696-024-03686-x.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142264946","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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

Fabrication and physicomechanical enhancement of APTES Cross-linked gelatin biopolymer films APTES 交联明胶生物聚合物薄膜的制作和物理力学性能提升

IF 2.2 4区化学

Chemical Papers Pub Date : 2024-09-16 DOI: 10.1007/s11696-024-03698-7

Naser Asadzadeh, Mohammad Ghorbanpour, Ali Sayyah

{"title":"Fabrication and physicomechanical enhancement of APTES Cross-linked gelatin biopolymer films","authors":"Naser Asadzadeh, Mohammad Ghorbanpour, Ali Sayyah","doi":"10.1007/s11696-024-03698-7","DOIUrl":"10.1007/s11696-024-03698-7","url":null,"abstract":"<div>The exceptional film-forming ability, biodegradability, biocompatibility, and wide availability of cross-linked gelatin have sparked considerable interest in its utilization for packaging purposes. APTES (3-Aminopropyltriethoxysilane) cross-linker is preferred due to its ability to bind with gelatin involving its silanol groups and for its non-hazardous nature. This study aims to fabricate cross-linked gelatin films specifically tailored for packaging applications. The FTIR spectra of the gelatin films provided evidence of successful cross-linking, as indicated by the presence of Si–O-Si and Si–OH bonds. SEM analysis exhibited structural uniformity with increasing concentrations of the cross-linker, indicating favorable interactions between APTES and gelatin molecules. Furthermore, enhanced thermal stability was observed, as evidenced by TGA results, suggesting the formation of stable cross-links. The introduction of APTES to the gelatin films preserved their transparency, reduced solubility (from 84 to 58%), lowered water permeability, and increased tensile strength up to 7.3 MPa with the increase in film thickness from 0.129 mm to 0.150 mm. Moreover, the films exhibited decreased transmission of UV light (reduced from 4.8 to 1.4% by adding APTES in the 280 nm wavelength), indicating potential applications in UV protection. Finally, the cross-linked gelatin films modified with APTES demonstrated favorable characteristics for packaging applications.</div>","PeriodicalId":513,"journal":{"name":"Chemical Papers","volume":"78 15","pages":"8505 - 8521"},"PeriodicalIF":2.2,"publicationDate":"2024-09-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142264947","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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

Recyclable g-C3N4 and K-doped g-C3N4 pellets for the photocatalytic production of H2O2 under direct sunlight 在阳光直射下光催化生产 H2O2 的可回收 g-C3N4 和掺 K g-C3N4 粒子

IF 2.2 4区化学

Chemical Papers Pub Date : 2024-09-14 DOI: 10.1007/s11696-024-03694-x

Manisha S. Kumar, P. Haripriya, Darbha V. Ravi Kumar

{"title":"Recyclable g-C3N4 and K-doped g-C3N4 pellets for the photocatalytic production of H2O2 under direct sunlight","authors":"Manisha S. Kumar, P. Haripriya, Darbha V. Ravi Kumar","doi":"10.1007/s11696-024-03694-x","DOIUrl":"10.1007/s11696-024-03694-x","url":null,"abstract":"<div>Hydrogen peroxide (H2O2) is an environmentally friendly oxidant, producing only water as a by-product upon decomposition. Given the energy-intensive nature of the conventional anthraquinone process for commercial H2O2 production, photocatalytic production of H2O2 using graphitic carbon nitride (g-C3N4) emerges as a viable alternative. Among the other alternatives for improving the efficiency of g-C3N4, potassium ion doping in g-C3N4 is one of the efficient methods that can further increases the yield of H2O2 production, as the K+ doping enhances the photogenerated charge carriers’ separation, intensity and range of visible light absorption, etc. However, traditional methods of catalyst dispersion are inefficient due to the challenges of retrieving the catalyst. Immobilization, while addressing the retrieval issues, adversely affects mass transfer and lowers photocatalyst efficiency. Hence, in this study, we explore an innovative approach to catalyst recycling by forming the catalyst into pellets that avoid immobilization, centrifugation, or any other tedious energy intensive separation process. Pellets of undoped g-C3N4 and 10 wt% K-doped g-C3N4 are tested for the photocatalytic production of H2O2 under direct sunlight and recycled for three times. These materials, i.e., undoped g-C3N4 and 10 wt% K-doped g-C3N4 pellets are able to produce ~ 407 µM g−1 h−1 and ~ 853 µM g−1 h−1 of H2O2, respectively, after three recycles. Such a novel approach of recycling the catalysts in the form of pellets can be extended for the large-scale production of H2O2 by loading the pellets to fixed bed column and operating it in continuous flow manner.</div>","PeriodicalId":513,"journal":{"name":"Chemical Papers","volume":"78 15","pages":"8465 - 8472"},"PeriodicalIF":2.2,"publicationDate":"2024-09-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142264948","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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

Gelatine source authentication using 1 H NMR spectroscopy and visual analysis approaches 利用 1 H NMR 光谱和视觉分析方法鉴定明胶来源

IF 2.2 4区化学

Chemical Papers Pub Date : 2024-09-13 DOI: 10.1007/s11696-024-03685-y

Giri Rohmad Barokah, Gian Primahana, Mohammad Faiz Karimy, Dwiyitno, Hedi Indra Januar

引用次数: 0