FlatChemPub Date : 2024-08-15DOI: 10.1016/j.flatc.2024.100725
Xia Xu , Changchun Chen , Yisheng Shi , Sunyao Chen , Yifeng Wang , Lin Pan , Zishen Guan
{"title":"NH2-MIL-125(Ti-Zr) synergized with WO3 to construct S-Scheme heterojunction photocatalysts for highly efficient degradation of organic dyes and tetracycline in water","authors":"Xia Xu , Changchun Chen , Yisheng Shi , Sunyao Chen , Yifeng Wang , Lin Pan , Zishen Guan","doi":"10.1016/j.flatc.2024.100725","DOIUrl":"10.1016/j.flatc.2024.100725","url":null,"abstract":"<div><p>The rapid treatment of organic dyes and tetracycline (TC) in industrial wastewater requires highly efficient semiconductor photocatalysts. In this study, the S-Scheme NH<sub>2</sub>-MIL-125 (Ti-Zr)/ WO<sub>3</sub> composite material was successfully synthesized using a two-step hydrothermal method. A comprehensive analysis using X-ray Diffraction (XRD), X-ray Photoelectron Spectroscopy (XPS), High Resolution Transmission Electron Microscopy (HRTEM), and Field Emission Scanning Electron Microscopy (FESEM) images revealed that WO<sub>3</sub> nanoparticles are intimately anchored on the NH<sub>2</sub>-MIL-125 (Ti-Zr) nanodisks, forming a closely packed heterostructure. The bandgap values of WO<sub>3</sub> and NH<sub>2</sub>-MIL-125 (Ti-Zr) were determined to be 2.58 eV and 2.67 eV, respectively. Through Response Surface Methodology (RSM), the optimal photocatalytic conditions for the degradation of simulated pollutants in real aqueous environments by the synthesized photocatalysts were explored. Under the full-spectrum irradiation of a 300 W xenon lamp, the TZW-2 composite photocatalyst exhibited a degradation rate of RhB, MB, and TC solutions as high as 95.7 %, 96.7 %, and 93 % within 90 min, respectively. The excellent photocatalytic performance of the composite photocatalyst originates from the establishment of S-scheme heterojunctions between NH<sub>2</sub>-MIL-125 (Ti-Zr) and WO<sub>3</sub>, which was confirmed by various characterization techniques such as XPS valence spectra, photoelectrochemistry, and free radical trapping experiments. The excellent stability of the prepared composite photocatalyst was further validated through three cycling test experiments. This work presents new ideas for constructing novel S-Scheme photocatalysts by combining bimetallic cluster MOFs and metal oxides for wastewater treatment.</p></div>","PeriodicalId":316,"journal":{"name":"FlatChem","volume":"47 ","pages":"Article 100725"},"PeriodicalIF":5.9,"publicationDate":"2024-08-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142021475","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
FlatChemPub Date : 2024-08-10DOI: 10.1016/j.flatc.2024.100723
Deepak Dabur , Yun Cheih Chiu , Hui-Fen Wu
{"title":"AIEE based fluorescent detection of Enrofloxacin using methyl isobutyl ketone as a backbone for the resilient 2D MIBK-Sn nanosheets","authors":"Deepak Dabur , Yun Cheih Chiu , Hui-Fen Wu","doi":"10.1016/j.flatc.2024.100723","DOIUrl":"10.1016/j.flatc.2024.100723","url":null,"abstract":"<div><p>For the first time, we proposed a novel approach to create enduring and robust fluorescent nanosheets by using MIBK as the backbone to form the 2D MIBK-Sn nanosheets (2D MIBK-Sn NS) for detecting ENR. These nanosheets were synthesized in situ using probe ultrasonication to facilitate the formation of MIBK-based 2D tin nanosheets. The LOD and LOQ for ENR in aqueous solutions was 4.90 and 16.1 nM, respectively. Linear calibration curves were obtained with correlation coefficient (R<sup>2</sup>) = 0.9920 in a linear range of 0–2 µM. Recovery results from real samples ranged from 90 to 106 % of the nominal values. Milk and urine samples were analyzed at concentrations ranging from 0.3 to 1.7 µM.</p></div>","PeriodicalId":316,"journal":{"name":"FlatChem","volume":"47 ","pages":"Article 100723"},"PeriodicalIF":5.9,"publicationDate":"2024-08-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142083923","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
FlatChemPub Date : 2024-08-05DOI: 10.1016/j.flatc.2024.100724
Amjid Rafique , Isabel Ferreira , Nenad Bundaleski , O.M.N.D. Teodoro , Ana C. Baptista
{"title":"Enhancing charge storage capacity of cellulose-sweat-based electrolyte flexible supercapacitors with electrochemically exfoliated free-standing carbon yarn electrodes","authors":"Amjid Rafique , Isabel Ferreira , Nenad Bundaleski , O.M.N.D. Teodoro , Ana C. Baptista","doi":"10.1016/j.flatc.2024.100724","DOIUrl":"10.1016/j.flatc.2024.100724","url":null,"abstract":"<div><p>The Internet of Things (IoT) provides an interface between different electronic devices such as flexible electronics, and e-textiles to capture and receive real-time data and help humans to devise systems that will adequately respond to these environmental stimuli. The main limitations of these devices to work 24/7 are the lack of continuous power supply and easy integration into textiles to perform their functions. The other issues are poor adhesion of active materials with substrates and peeling-off of active material from the electrode substrates and consequently, degradation of electrochemical performance. A potential and evolving strategy is fabricating a current collector-less and integrable carbon yarn-based energy storage device. Herein, we are presenting a facile and novel technique to exfoliate carbon yarn fibers to enhance their electrochemical performance by 3 orders of magnitude. Activated carbon yarn wires acting as current collector-less electrodes along with cellulose acetate-based composite separators offer a large surface area to simulated sweat electrolyte ions and show a gravimetric capacitance of 11.28 Fg<sup>−1</sup> at the scan rate of 5 mVs<sup>−1</sup>. Activated carbon yarn-based symmetric supercapacitor device in a simulated sweat solution electrolyte offers excellent cyclic and bending stability with over 95 % capacitance retention in both tests.</p></div><div><h3>Theoretical insight</h3><p>Supercapacitors (SCs) comprise many active and passive elements. The most passive and vital elements are current collectors, separators, binders, electrolytes, and packaging. Two key elements, current collector and binders can be eliminated by developing current collector-free or free-standing electrodes. Carbonaceous materials such as graphene <span><span>[1]</span></span>, <span><span>[2]</span></span>, carbon nanotubes (CNT) <span><span>[3]</span></span>, porous carbon <span><span>[2]</span></span>, and carbon onions<span><span>[4]</span></span>, <span><span>[5]</span></span> are common alternatives of active materials for SCs electrodes owing to their low cost, chemical stability, large surface area, and high electrical conductivity. These active materials show exceptional attributes such as long cyclic life, and high-rate capability owing to their intrinsic operation mechanism e.g., surface charge storage due to large surface area. However, they also suffer from low specific capacitance ascribed to low surface area exposed to electrolyte ions and low charge storage due to poor wettability. The most efficient technique to address this problem is to incorporate doped heteroatoms or surface functional groups such as surface oxygen groups present on the surface of carbon yarn. The inclusion of these doped heteroatoms and functional groups boosts the intrinsic properties, such as electrical conductivity, and wettability. The increased electro-active surface area offers more active sites for electrolyte ions, resulting in mor","PeriodicalId":316,"journal":{"name":"FlatChem","volume":"47 ","pages":"Article 100724"},"PeriodicalIF":5.9,"publicationDate":"2024-08-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2452262724001181/pdfft?md5=fa459ea952209fb845c2be489f14eafa&pid=1-s2.0-S2452262724001181-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141948775","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
FlatChemPub Date : 2024-08-03DOI: 10.1016/j.flatc.2024.100722
Reyhaneh Bahramian, Mohammad B. Nezafati, Seyed Hamed Aboutalebi
{"title":"Recent progress and prospects of two-dimensional materials for electromagnetic interference shielding","authors":"Reyhaneh Bahramian, Mohammad B. Nezafati, Seyed Hamed Aboutalebi","doi":"10.1016/j.flatc.2024.100722","DOIUrl":"10.1016/j.flatc.2024.100722","url":null,"abstract":"<div><p>The rapid increase in electronic device usage has intensified electromagnetic interference (EMI), necessitating the development of shielding materials that are flexible, lightweight, cost-effective, and highly efficient. Two-dimensional (2D) materials have emerged as promising candidates for next-generation EMI shielding solutions due to their unique properties, such as low weight, mechanical flexibility, and affordability. This review explores the origins of electromagnetic responses and the shielding mechanisms, emphasizing photon-matter interactions. We also examine the instruments, methods, and standards for measuring shielding effectiveness, along with the underlying formulas for shielding efficiency (SE) calculation. Recent advancements in 2D materials for EMI shielding are analyzed, comparing their performance across various frequency ranges to other composites. In addition, the challenges ahead and their prospects are highlighted. We provide insight into forthcoming challenges in finding solutions for the next generation of shielding applications. The findings of this review provide valuable insights into the development of novel materials for EMI shielding and can guide future research in this field.</p></div>","PeriodicalId":316,"journal":{"name":"FlatChem","volume":"47 ","pages":"Article 100722"},"PeriodicalIF":5.9,"publicationDate":"2024-08-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141948776","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
FlatChemPub Date : 2024-07-29DOI: 10.1016/j.flatc.2024.100721
Avraham Bar-Hen , Ronen Bar Ziv , Paz Stein , Nidhi Sharma , Maya Bar Sadan
{"title":"Constructing novel Sn-Mo bimetallic sulfide heterostructures for enhanced catalytic performance towards the hydrogen evolution reaction","authors":"Avraham Bar-Hen , Ronen Bar Ziv , Paz Stein , Nidhi Sharma , Maya Bar Sadan","doi":"10.1016/j.flatc.2024.100721","DOIUrl":"10.1016/j.flatc.2024.100721","url":null,"abstract":"<div><p>Understanding the design principles of efficient electrocatalysts using the structure–activity relationship is crucial for the advancement of energy-related applications, and specifically the hydrogen evolution reaction (HER). Non-precious electrocatalysts with low overpotentials are essential for driving the HER and achieving high energy efficiency. In this study, we synthesized and thoroughly investigated various heterostructures combining Mo and Sn sulfides, ranging from complete phase-separated hybrids to homogeneous mixtures: SnS@MoS<sub>2</sub> core–shell structures, SnS/MoS<sub>2</sub> with edge-rich Mo and (Sn<sub>x</sub>Mo<sub>1-x</sub>)S with uniformly distributed Sn-Mo. Our findings reveal that the SnS@MoS<sub>2</sub> structure exhibited relatively high intrinsic activity characterized by a high electrochemical active surface area and rapid charge transfer kinetics, thereby enhancing the HER catalytic performance. The presence of fluffy MoS<sub>2</sub> layers provided an abundance of optimized sites for HER, potentially due to strain and defects such as S vacancies, known as active catalytic sites. The optimal structure facilitated efficient charge transfer from the core to the shell, improving conductivity and catalytic activity. Our research highlights the advantages of a core–shell hybrid structure, offering guiding principles for the development of an optimal SnS@MoS<sub>2</sub> catalyst.</p></div>","PeriodicalId":316,"journal":{"name":"FlatChem","volume":"47 ","pages":"Article 100721"},"PeriodicalIF":5.9,"publicationDate":"2024-07-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141961959","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
FlatChemPub Date : 2024-07-26DOI: 10.1016/j.flatc.2024.100719
Dharaben J. Joshi , Sanjay Jha , Naved I. Malek , Tae Jung Park , Suresh Kumar Kailasa
{"title":"Tuning of fluorescence in titanium carbide MXene nanosheets with La3+ ion doping for the recognition of creatinine biomarker in biofluids","authors":"Dharaben J. Joshi , Sanjay Jha , Naved I. Malek , Tae Jung Park , Suresh Kumar Kailasa","doi":"10.1016/j.flatc.2024.100719","DOIUrl":"10.1016/j.flatc.2024.100719","url":null,"abstract":"<div><p>There is a strong correlation between the concentration of creatinine in human urine and the overall health of the kidneys. Therefore, there has been a persistent need for a rapid, and cost-effective quantitative method to assay creatinine levels in urine. Herein, green fluorescent La<sup>3+</sup> doped titanium carbide nanosheets (La<sup>3+</sup>-doped Ti<sub>3</sub>C<sub>2</sub> NSs) are fabricated via HF etching method by using Ti<sub>3</sub>AlC<sub>2</sub> as MAX phase material and La(NO<sub>3</sub>)<sub>3</sub> as a doping agent. As synthesized fluorescent La<sup>3+</sup>-doped Ti<sub>3</sub>C<sub>2</sub> NSs are stable, showing green fluorescence under UV light. The as-synthesized La<sup>3+</sup>-doped Ti<sub>3</sub>C<sub>2</sub> NSs act as a fluorescent sensor for the sensitive recognition of creatinine biomarker. The La<sup>3+</sup>-doped Ti<sub>3</sub>C<sub>2</sub> NSs-based fluorescence method showed a fluorescence quenching at emission wavelength 518 nm towards creatinine with a linear range of 0.25–7.5 μM and detection limit of 63.44 nM. The paper strip based on La<sup>3+</sup>-doped Ti<sub>3</sub>C<sub>2</sub> NSs was developed for the visual identification of creatinine. Furthermore, La<sup>3+</sup>-doped Ti<sub>3</sub>C<sub>2</sub> NSs were used as probes for imaging of <em>Saccharomyces cerevisiae</em> cells. Also, the as-fabricated La<sup>3+</sup>-doped Ti<sub>3</sub>C<sub>2</sub> NSs propose a quick response giving a cost-effective analytical strategy for the selective assay of creatinine in biofluids (plasma and urine).</p></div>","PeriodicalId":316,"journal":{"name":"FlatChem","volume":"47 ","pages":"Article 100719"},"PeriodicalIF":5.9,"publicationDate":"2024-07-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141845768","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
FlatChemPub Date : 2024-07-26DOI: 10.1016/j.flatc.2024.100718
Song Li , Yanhong Lyu , Jianyun Zheng , Zdenek Sofer , Huaijuan Zhou
{"title":"Boosting the built-in electric field in heterojunctions of 2D and 3D systems to accelerate the separation and transfer of photogenerated carriers for efficient photocatalysis","authors":"Song Li , Yanhong Lyu , Jianyun Zheng , Zdenek Sofer , Huaijuan Zhou","doi":"10.1016/j.flatc.2024.100718","DOIUrl":"10.1016/j.flatc.2024.100718","url":null,"abstract":"<div><p>Inhibiting the rapid recombination of photogenerated carriers has been a serious challenge to improve photocatalytic efficiency. Constructing and boosting the built-in electric field in photocatalysts of 2D and 3D systems can effectively promote the separation and transfer of photogenerated charge carriers. Herein, we systematically summarize the construction principle, characterization methods about the direction and intensity of the built-in electric field, and several strategies to boost the built-in electric field including structure optimization, phase modulation, vacancy defects engineering, doping strategies, construction of charge transfer mediators. It is worth noting that the uneven charge distribution in the material (or differences in the position of the Fermi level) is a key issue in the construction and enhancement of built-in electric field. Finally, the application of the built-in electric field in photocatalytic water splitting, carbon dioxide reduction, nitrogen fixation and pollutant degradation are described. This review highlights a comprehensive understanding of the mechanism of built-in electric field in photocatalysis and offers some insights into the design and modification of photocatalysts for different applications.</p></div>","PeriodicalId":316,"journal":{"name":"FlatChem","volume":"47 ","pages":"Article 100718"},"PeriodicalIF":5.9,"publicationDate":"2024-07-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141849240","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
FlatChemPub Date : 2024-07-26DOI: 10.1016/j.flatc.2024.100720
Yuanming Hou , Xiaocheng Song , Yanqing Zhang , Tingting Ren , Jiaxin Wang , Jingyi Qin , Jianjun Yang , Zhengzheng Xie , Zhihong Tian , Zhongjie Guan , Xianwei Fu , Shilong Jiao , Qiuye Li , Erling Li
{"title":"0D/2D Schottky heterojunction of CsPbBr3 nanocrystals on MoN nanosheets for enhancing charge transfer and CO2 photoreduction","authors":"Yuanming Hou , Xiaocheng Song , Yanqing Zhang , Tingting Ren , Jiaxin Wang , Jingyi Qin , Jianjun Yang , Zhengzheng Xie , Zhihong Tian , Zhongjie Guan , Xianwei Fu , Shilong Jiao , Qiuye Li , Erling Li","doi":"10.1016/j.flatc.2024.100720","DOIUrl":"10.1016/j.flatc.2024.100720","url":null,"abstract":"<div><p>Solar-driven conversion of CO<sub>2</sub> to value-added chemical fuels has been regarded as a promising strategy for solving the climate problem and energy crisis. To realize this goal, it is vital to design photocatalysts with abundant catalytic active sites and excellent charge separation efficiency. Here, perovskite nanocrystals (CsPbBr<sub>3</sub>) were anchored on two-dimensional molybdenum nitride (MoN) using an in-situ growth method, forming a new and effective 0D/2D CsPbBr<sub>3</sub>@MoN (CPB@MoN) nanoheterosturcture with close contact interface for CO<sub>2</sub> photoreduction. The introduction of MoN, acting as a charge transfer channel, could quickly trap the photoinduced charge from CsPbBr<sub>3</sub> and provide abundant catalytic sites for CO<sub>2</sub> photocatalytic reactions. For optimized CsPbBr<sub>3</sub>@MoN composites, the CO yield was 13.86μmol/gh<sup>−1</sup> without any sacrificial reagent, which was a 4.5-fold enhancement of the pure CsPbBr<sub>3</sub>. Further, in-situ diffuse reflectance infrared Fourier transform spectroscopy (DRIFTS) revealed the catalytic mechanism for the CO<sub>2</sub> photoreduction process. This work provides a new platform for constructing superior perovskite/MoN-based photocatalysts for photocatalytic CO<sub>2</sub> reduction.</p></div>","PeriodicalId":316,"journal":{"name":"FlatChem","volume":"47 ","pages":"Article 100720"},"PeriodicalIF":5.9,"publicationDate":"2024-07-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141948777","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
FlatChemPub Date : 2024-07-20DOI: 10.1016/j.flatc.2024.100716
Majid Zomorodian Esfahani , Elham Soroush , Sama Mohammadnejad , Motahareh Helli , Adrine Malek Khachatourian , Muhammet S. Toprak , Rajender S. Varma
{"title":"Copper oxide/graphene-based composites: Synthesis methods, appliances and recent advancements","authors":"Majid Zomorodian Esfahani , Elham Soroush , Sama Mohammadnejad , Motahareh Helli , Adrine Malek Khachatourian , Muhammet S. Toprak , Rajender S. Varma","doi":"10.1016/j.flatc.2024.100716","DOIUrl":"10.1016/j.flatc.2024.100716","url":null,"abstract":"<div><p>Nanomaterials adorned on graphene comprise an essential component of a wide range of devices wherein graphene-based copper oxide nanocomposites have garnered significant attention in recent years. Copper oxides (CuO and Cu<sub>2</sub>O) are semiconductors with distinctive optical, electrical, and magnetic properties. Their earth abundance, low cost, narrow bandgap, high absorption coefficient, and low toxicity of copper oxides are just a few key advantages. CuO is superior to Cu<sub>2</sub>O in optical switching applications because of its narrower bandgap. Therefore, integrating graphene with copper oxides renders the ensuing nanocomposites much more valuable for various applications. Not surprisingly, a wide range of promising synthesis and processing techniques have been considered, focusing on multiple appliances such as sensors, energy storage, harvesting, and electrocatalysis. Herein, the most recent synthesis techniques and applications of doped, undoped, and hierarchical structures of CuO/Cu<sub>2</sub>O-graphene-based nanocomposites are deliberated, including the potential future usages.</p></div>","PeriodicalId":316,"journal":{"name":"FlatChem","volume":"47 ","pages":"Article 100716"},"PeriodicalIF":5.9,"publicationDate":"2024-07-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141850626","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
FlatChemPub Date : 2024-07-18DOI: 10.1016/j.flatc.2024.100717
Ankur Yadav , Ankit Kumar , Monojit Bag
{"title":"Enhancing device performance and stability of lead-free quasi-2D halide perovskite supercapacitor through Ag+/Bi3+ cation interaction","authors":"Ankur Yadav , Ankit Kumar , Monojit Bag","doi":"10.1016/j.flatc.2024.100717","DOIUrl":"10.1016/j.flatc.2024.100717","url":null,"abstract":"<div><p>Compared to their three-dimensional (3D) counterparts, low-dimensional layered perovskite (2D) structures using bulky organic ammonium cations (PEA<sup>+</sup>) have significantly improved stability but generally worse performance. 3D perovskites with significant ion migration, one of the major concerns for structural instability, show better charge storage capacity. In contrast, strong van der Waals contacts and bulky spacer ligands in 2D perovskites inhibit the migration of halide ions. Mixed properties of 2D and 3D or quasi-2D layered perovskite demonstrate more efficient, tuneable optoelectronic properties and long-term stability. The performance and stability of the electrochemical supercapacitor may be significantly influenced by ion migration, as we have shown by fabricating porous electrodes from 3D-Cs<sub>2</sub>AgBiBr<sub>6</sub> bulk perovskite, 2D/3D or quasi-2D PEA-Cs<sub>2</sub>AgBiBr<sub>6</sub>, and layered perovskite 2D PEA<sub>4</sub>AgBiBr<sub>8</sub>. The quasi-2D electrodes were found to have an energy density ∼1.75 times higher than the 3D perovskite electrodes and ∼4.5 times higher than that of pure 2D halide electrodes. Compared to 2D and 3D electrodes, quasi-2D has a maximum capacitance retention of around 93 % after 2000 operation cycles. Ex-situ X-ray diffraction was conducted to examine further structural changes in the quasi-2D, 2D, and 3D perovskite electrode materials. It was determined that the ordering arrangement of Ag<sup>+</sup>/Bi<sup>3+</sup> cation improves the crystallinity of the structure, which enhances the device performance and stability of the quasi-2D electrode. Also, Ag<sup>3+</sup> is essential for improving the strength of quasi-2D and 2D electrodes, as evidenced by X-ray photoelectron spectroscopy (XPS). A symmetric solid-state supercapacitor was fabricated and analyzed using a two-electrode method, demonstrating that the quasi-2D configuration has the highest energy density compared to the pure 2D and 3D perovskite electrode materials.</p></div>","PeriodicalId":316,"journal":{"name":"FlatChem","volume":"47 ","pages":"Article 100717"},"PeriodicalIF":5.9,"publicationDate":"2024-07-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141848657","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}