Korean Journal of Chemical Engineering最新文献_第9页

Design of Homojunction Perovskite Solar-Cell Devices Without Hole-Transport Layer 无空穴传输层的同结钙钛矿太阳能电池器件设计

IF 2.9 4区工程技术

Korean Journal of Chemical Engineering Pub Date : 2024-11-04 DOI: 10.1007/s11814-024-00304-0

Weijie Fang, Le Chen, Wenquan Zhou, Jiafan Wang, Kai Huang, Rui Zhu, Jiang Wu, Bangfu Liu, Qi Fang, Xianxuan Wang, Jiachao Wang

{"title":"Design of Homojunction Perovskite Solar-Cell Devices Without Hole-Transport Layer","authors":"Weijie Fang, Le Chen, Wenquan Zhou, Jiafan Wang, Kai Huang, Rui Zhu, Jiang Wu, Bangfu Liu, Qi Fang, Xianxuan Wang, Jiachao Wang","doi":"10.1007/s11814-024-00304-0","DOIUrl":"10.1007/s11814-024-00304-0","url":null,"abstract":"<div><p>Perovskite solar cells (PSCs) that lack a hole transport layer (HTL) attract considerable interest because of their straightforward design. This study utilizes the inherent self-doping properties of perovskite to propose a novel homojunction design combining n-FASnI<sub>3</sub> and p-FASnI<sub>3</sub> for efficient HTL-free PSCs. The internal factors affecting the device, such as defect density, electron affinity, bandgap, and doping concentration, are investigated using the solar-cell capacitance simulator (SCAPS-1D). An interfacial defect layer (IDL) is introduced between n-FASnI<sub>3</sub> and TiO<sub>2</sub> to mitigate recombination at interfaces, with related parameters also optimized. Furthermore, the influence of various metal electrodes on PSC performance is examined. Ultimately, the cell achieves an optimized power-conversion efficiency of 30.52%. These findings highlight the bright prospects of homojunction-based HTL-free PSCs. They simplify device structure and production processes while preserving high efficiency. This research lays the groundwork for future industrial applications of HTL-free PSCs in the field of photovoltaics.</p></div>","PeriodicalId":684,"journal":{"name":"Korean Journal of Chemical Engineering","volume":"42 2","pages":"307 - 322"},"PeriodicalIF":2.9,"publicationDate":"2024-11-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142994505","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Photocatalyst Design Principles for Photocatalytic Hydrogen Production and Benzyl Alcohol Oxidation with CdS Nanosheets 利用 CdS 纳米片进行光催化制氢和苄醇氧化的光催化剂设计原理

IF 2.9 4区工程技术

Korean Journal of Chemical Engineering Pub Date : 2024-11-02 DOI: 10.1007/s11814-024-00317-9

Ryun Na Kim, Jihun Kim, Gui-Min Kim, Doh C. Lee, Whi Dong Kim

{"title":"Photocatalyst Design Principles for Photocatalytic Hydrogen Production and Benzyl Alcohol Oxidation with CdS Nanosheets","authors":"Ryun Na Kim, Jihun Kim, Gui-Min Kim, Doh C. Lee, Whi Dong Kim","doi":"10.1007/s11814-024-00317-9","DOIUrl":"10.1007/s11814-024-00317-9","url":null,"abstract":"<div><p>To produce hydrogen using photocatalysts while maintaining environmentally friendly characteristics, research has focused on using benzyl alcohol (BzOH) as a hole scavenger to convert it into the valuable compound benzaldehyde (BA). However, due to the relatively slow oxidation rate of BzOH compared to conventional hole scavengers, tailored photocatalyst designs are necessary. In this study, we prepared CdS nanosheets (NSs) and introduced Na<sub>2</sub>SO<sub>4</sub>–Na<sub>2</sub>SO<sub>3</sub> and BzOH as hole scavengers to adjust the oxidation half-reaction rate (OHR) during the photocatalytic reaction. Various co-catalysts were introduced to examine how changes in the reduction half-reaction (RHR) and OHR rates influence hydrogen production. The results reveal that the selection of co-catalyst and hole scavenger significantly influences the rate-determining step (RDS) in the photocatalytic reaction. For bare CdS NSs, the slow RHR results in the RDS being the RHR, leading to similar hydrogen production rate regardless of the scavenger type. However, with Pt as a co-catalyst, the RDS shifts to the OHR due to the accelerated RHR, inducing hydrogen production rate highly sensitive to the type of scavenger. Consequently, hydrogen production is significantly reduced when using BzOH, which has a slower oxidation rate. These findings suggest that achieving high hydrogen yields is fundamentally challenging with BzOH due to its slow oxidation rate, even with the introduction of excellent co-catalysts. Therefore, it is imperative to develop photocatalyst materials with lower valence band level for high oxidation power.</p></div>","PeriodicalId":684,"journal":{"name":"Korean Journal of Chemical Engineering","volume":"41 13","pages":"3621 - 3629"},"PeriodicalIF":2.9,"publicationDate":"2024-11-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142636680","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Cutting-Edge Advances in Perovskite Photovoltaic Devices and Applications 钙钛矿光伏器件及应用的前沿进展

IF 2.9 4区工程技术

Korean Journal of Chemical Engineering Pub Date : 2024-10-29 DOI: 10.1007/s11814-024-00319-7

SangMyeong Lee, Hyun Suk Jung

{"title":"Cutting-Edge Advances in Perovskite Photovoltaic Devices and Applications","authors":"SangMyeong Lee, Hyun Suk Jung","doi":"10.1007/s11814-024-00319-7","DOIUrl":"10.1007/s11814-024-00319-7","url":null,"abstract":"<div><p>Perovskite solar cells (PSCs) have rapidly emerged as a promising photovoltaic technology, with power conversion efficiencies (PCEs) improving from 3% to over 26% within a decade. This progress positions PSCs as a competitive alternative to traditional silicon-based cells, offering advantages in performance, cost-effectiveness, and flexible applications. The unique ABX<sub>3</sub> crystal structure of perovskites enables tunable optoelectronic properties, making them ideal for a broad spectrum of solar and optoelectronic applications. The high absorption coefficient, long diffusion lengths, and high charge-carrier mobility of PSCs have accelerated their development. However, challenges such as environmental instability and toxic solvent use hinder commercialization. Current research focuses on enhancing stability through passivation, encapsulation, and eco-friendly fabrication methods using solvents like γ-valerolactone. In addition to solar cells, perovskite materials show promise in photodetectors, LEDs, and memristors, making them central to next-generation optoelectronic devices. This review highlights the potential of PSCs while addressing the technological advancements needed for their commercial viability.</p></div>","PeriodicalId":684,"journal":{"name":"Korean Journal of Chemical Engineering","volume":"41 14","pages":"3703 - 3715"},"PeriodicalIF":2.9,"publicationDate":"2024-10-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142798501","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Structural, Electrical, and Optical Responses in Hybrid Perovskite Semiconductors: The Influence of Symmetry in Central Molecule Interactions 杂化钙钛矿半导体的结构、电学和光学响应：中心分子相互作用对称性的影响

IF 2.9 4区工程技术

Korean Journal of Chemical Engineering Pub Date : 2024-10-28 DOI: 10.1007/s11814-024-00315-x

Majid Karimi, Abolfazl Jangjoy

{"title":"Structural, Electrical, and Optical Responses in Hybrid Perovskite Semiconductors: The Influence of Symmetry in Central Molecule Interactions","authors":"Majid Karimi, Abolfazl Jangjoy","doi":"10.1007/s11814-024-00315-x","DOIUrl":"10.1007/s11814-024-00315-x","url":null,"abstract":"<div><p>Hybrid organic–inorganic lead halide perovskites (HOIPs) have recently attracted ever-increasing attention due to their usefulness in optoelectronic devices such as highly efficient solar cells. In this work, a first-principles theoretical study is performed to investigate the effect of the replacement of inorganic cesium cations by organic methylammonium and formamidinium cations on the structural, electrical, and optical properties of HOIPs. We showed that these replacements profoundly affect the cation–cation (Cs<sup>+</sup>, MA<sup>+</sup>, FA<sup>+</sup>–Pb<sup>2+</sup>) and cation–anion (Cs<sup>+</sup>, MA<sup>+</sup>, FA<sup>+</sup>–I<sup>−</sup>, Br<sup>−</sup>, Cl<sup>−</sup>) interactions in the structure of HOIPs. It was found that the symmetry/asymmetry of the distribution of central cation interactions influences the band structure (considering spin–orbit coupling), electron density, dielectric function, and optical absorption spectrum. Finally, it can be said that due to specific disorders in the distribution of interactions and subsequently the creation of specific energy levels, HOIPs have higher power conversion efficiency (PCE) in solar cells than pure inorganic perovskites.</p><h3>Graphical Abstract</h3>\u0000<div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":684,"journal":{"name":"Korean Journal of Chemical Engineering","volume":"42 2","pages":"429 - 443"},"PeriodicalIF":2.9,"publicationDate":"2024-10-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142995742","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Enhanced Energy Storage Capacity of TiO2 Atomic Layered Molybdenum Oxide–Sulfide Negatrode for an Aqueous Ammonium Ion Supercapacitor 用于铵离子水溶液超级电容器的二氧化钛原子层氧化钼-硫化物负极的增强储能能力

IF 2.9 4区工程技术

Korean Journal of Chemical Engineering Pub Date : 2024-10-26 DOI: 10.1007/s11814-024-00310-2

Sangeeta Adhikari, Amarnath T. Sivagurunathan, Manasi Murmu, Do-Heyoung Kim

{"title":"Enhanced Energy Storage Capacity of TiO2 Atomic Layered Molybdenum Oxide–Sulfide Negatrode for an Aqueous Ammonium Ion Supercapacitor","authors":"Sangeeta Adhikari, Amarnath T. Sivagurunathan, Manasi Murmu, Do-Heyoung Kim","doi":"10.1007/s11814-024-00310-2","DOIUrl":"10.1007/s11814-024-00310-2","url":null,"abstract":"<div><p>Ammonium ions (NH<sub>4</sub><sup>+</sup>) being the non-metallic charge carriers are deemed safe while enhancing the charge storage performance. To enable long term efficiency in energy storage systems, one needs to overcome the primary obstacle to ammonium storage, which is to develop materials with layered structures having enough interlayer separations as electrodes for hosting NH<sub>4</sub><sup>+</sup> ions reversibly. To address the issues, herein, synthesis of a molybdenum oxide–sulfide composite with titanium oxide atomic layering was prepared to serve as active negative electrode (negatrode). The growth of MoS<sub>2</sub> nanosheet on hydrothermally grown MoO<sub>3</sub> nanosheets was confirmed from the low- and high-resolution imaging. The presence of uniform layer of TiO<sub>2</sub> over MoS<sub>2</sub>/MoO<sub>3</sub> electrode was verified through imaging and compositional analysis. Thanks to its distinct nano-architecture and surface atomic layering, the constructed TiO<sub>2</sub>/MoS<sub>2</sub>/MoO<sub>3</sub> electrode was able to deliver specific capacitance of 624 F/g at a current density of 3 A/g. After 3000 charge–discharge cycles, the electrode’s retention was close to 86% at 5 A/g current density. The present results provide insights into the development of non-metal ion-electrolyte-based energy storage systems.</p></div>","PeriodicalId":684,"journal":{"name":"Korean Journal of Chemical Engineering","volume":"41 13","pages":"3647 - 3655"},"PeriodicalIF":2.9,"publicationDate":"2024-10-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142636869","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Exploring Carbon Nanotubes for Enhanced Hydrogen Storage: A Review on Synthesis, Mechanisms, and Evaluation 探索碳纳米管增强储氢：合成、机理和评价综述

IF 2.9 4区工程技术

Korean Journal of Chemical Engineering Pub Date : 2024-10-25 DOI: 10.1007/s11814-024-00311-1

U. S. Harisankar, Sreedevi K. Menon, Jeetu S. Babu, Balakrishnan Shankar

{"title":"Exploring Carbon Nanotubes for Enhanced Hydrogen Storage: A Review on Synthesis, Mechanisms, and Evaluation","authors":"U. S. Harisankar, Sreedevi K. Menon, Jeetu S. Babu, Balakrishnan Shankar","doi":"10.1007/s11814-024-00311-1","DOIUrl":"10.1007/s11814-024-00311-1","url":null,"abstract":"<div><p>In pursuing a carbon–neutral world, hydrogen’s environmentally friendly attributes and high energy density make it a promising fossil fuel alternative. The main challenge in using hydrogen as a clean energy source is the need for dependable storage technology. Material-based solid-state systems are favored for their reliability over conventional storage methods and for meeting the DoE, USA targets. Carbon nanotube-based materials stand out among material-based hydrogen storage systems due to their unique advantages over others. High surface area, mesoporous structure, tunable features, honeycomb structure, chemical stability, low mass density, hydrogen molecule dissociation and an easy synthesis process are only a few of its distinctive qualities. Many material-based hydrogen storage systems rely on chemisorption, lacking reversibility and necessitating energy for hydrogen release. In contrast, CNT-based materials predominantly employ physisorption, merely adsorbing hydrogen without chemical bonding. This approach allows for more efficient hydrogen release, ensuring superior stability and reversibility compared to other material-based systems. This review paper assesses the hydrogen storage capabilities, different properties and rapid adsorption/desorption kinetics of carbon nanotube-based materials at lower temperatures. It discusses preparation methods and influencing mechanisms and explores both pristine and modified CNTs’ potential for hydrogen storage alongside safety considerations and future prospects.</p></div>","PeriodicalId":684,"journal":{"name":"Korean Journal of Chemical Engineering","volume":"42 1","pages":"13 - 42"},"PeriodicalIF":2.9,"publicationDate":"2024-10-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142906087","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Evaluation of the Properties and Compositions of Blended Bio-jet Fuels Derived from Fast Pyrolysis Bio-oil made from Wood According to Aging Test 根据老化试验评估从木材快速热解生物油中提取的混合生物喷气燃料的性能和成分

IF 2.9 4区工程技术

Korean Journal of Chemical Engineering Pub Date : 2024-10-25 DOI: 10.1007/s11814-024-00309-9

Hwayeon Jeon, Jumin Youn, Jo Yong Park, Eui-Soon Yim, Jeong-Myeong Ha, Young-Kwon Park, Jae Woo Lee, Jae-Kon Kim

{"title":"Evaluation of the Properties and Compositions of Blended Bio-jet Fuels Derived from Fast Pyrolysis Bio-oil made from Wood According to Aging Test","authors":"Hwayeon Jeon, Jumin Youn, Jo Yong Park, Eui-Soon Yim, Jeong-Myeong Ha, Young-Kwon Park, Jae Woo Lee, Jae-Kon Kim","doi":"10.1007/s11814-024-00309-9","DOIUrl":"10.1007/s11814-024-00309-9","url":null,"abstract":"<div><p>The aviation industry has set ambitious goals for reducing carbon emissions, with the International Civil Aviation Organization targeting net-zero carbon emissions by 2050. Bio-jet fuel is expected to play a crucial role in achieving this target, and the demand for bio-jet fuel is projected to rapidly increase. Bio-oil from fast pyrolysis of lignin, such as waste wood, is considered a promising alternative for production of bio-jet fuel through processes such as hydrodeoxygenation. In this study, the physical properties and compositions of bio-jet fuel produced from wood-derived pyrolysis bio-oil blended with petroleum-based jet fuel as well as their changes during 16 weeks storage were investigated. Consistently, 0%, 10%, 50%, and 100% blended bio-jet fuels were prepared. After 16 weeks of aging, the total acid number of the all-blended bio-jet fuel showed a sharp increase from 12 weeks, reaching over 0.1 mg KOH/g. Additionally, kinematic viscosity showed a steady increase over 16 weeks whereas oxidative stability decreased by approximately 20% at 16 weeks for the 100% bio-jet fuel alone. The final boiling point increased by up to 20% in higher blends of bio-jet fuel and the average molecular weight increased. Bio-jet fuel has a high olefin content, which can further increase during storage, leading to a decrease in the combustion characteristics. This study suggests that using up to 10% the bio-jet fuel in aircraft is safe considering storage stability, but further research is required to confirm this finding.</p></div>","PeriodicalId":684,"journal":{"name":"Korean Journal of Chemical Engineering","volume":"41 13","pages":"3631 - 3646"},"PeriodicalIF":2.9,"publicationDate":"2024-10-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s11814-024-00309-9.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142636806","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","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 Methods of Microneedles with Polymeric Materials 高分子材料制备微针的方法

IF 2.9 4区工程技术

Korean Journal of Chemical Engineering Pub Date : 2024-10-24 DOI: 10.1007/s11814-024-00314-y

Hyewon Choi, Hyein Seo, Hyunsik Yoon

引用次数: 0

Recent Developments in Near-Infrared-II Luminescence Imaging Using Inorganic Nanoparticles: Semiconductor Quantum Dots and Lanthanide Nanoparticles 利用无机纳米粒子进行近红外-II 发光成像的最新进展：半导体量子点和镧系元素纳米粒子

IF 2.9 4区工程技术

Korean Journal of Chemical Engineering Pub Date : 2024-10-23 DOI: 10.1007/s11814-024-00300-4

Jeong Geun Kim, Hyeon Jung Yu, Ruda Lee, Yong Il Park

{"title":"Recent Developments in Near-Infrared-II Luminescence Imaging Using Inorganic Nanoparticles: Semiconductor Quantum Dots and Lanthanide Nanoparticles","authors":"Jeong Geun Kim, Hyeon Jung Yu, Ruda Lee, Yong Il Park","doi":"10.1007/s11814-024-00300-4","DOIUrl":"10.1007/s11814-024-00300-4","url":null,"abstract":"<div><p>Fluorescence imaging finds extensive application in cellular and small animal studies due to its superior temporal and spatial resolution. However, fluorescence imaging using visible light faces limitations such as shallow tissue penetration, phototoxicity from excitation sources, and compromised detection sensitivity owing to background autofluorescence interference. To address these issues, researchers have explored longer wavelength light, particularly near-infrared-I (NIR-I) in the 700–900 nm range. Moreover, there is growing interest in exploiting NIR-II light, which spans the 1000–1700 nm range, to enhance the detection sensitivity, resolution, and tissue-penetration depth. In the NIR-II region, light scattering is minimized, thus enabling deeper tissue penetration of up to ~ 10 mm, along with reduced tissue autofluorescence. This facilitates high-sensitivity and high-resolution fluorescence imaging. The present review highlights inorganic nanoparticle-based imaging probes characterized by exceptional photostability and easily tunable emission wavelengths, including quantum dots and lanthanide nanoparticles. Specifically, recent advancements in improving the luminescence efficiency of NIR-II quantum dots and lanthanide nanoparticles, tuning the emission wavelengths to longer ranges, and designing stimuli-responsive mechanisms for precise targeted imaging are discussed.</p></div>","PeriodicalId":684,"journal":{"name":"Korean Journal of Chemical Engineering","volume":"41 13","pages":"3603 - 3619"},"PeriodicalIF":2.9,"publicationDate":"2024-10-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142636693","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Ferrocyanide-Surface Ligands to Quantum Dots for Prussian Blue Composites Showing Efficient and Reversible Electrochemical Response 用于普鲁士蓝复合材料的亚铁氰化铁表面配体与量子点，显示出高效和可逆的电化学响应

IF 2.9 4区工程技术

Korean Journal of Chemical Engineering Pub Date : 2024-10-21 DOI: 10.1007/s11814-024-00302-2

Taeyong Ha, Yunmo Sung, Yongju Kwon, Sukyung Choi, Ho Jin, Sungjee Kim

{"title":"Ferrocyanide-Surface Ligands to Quantum Dots for Prussian Blue Composites Showing Efficient and Reversible Electrochemical Response","authors":"Taeyong Ha, Yunmo Sung, Yongju Kwon, Sukyung Choi, Ho Jin, Sungjee Kim","doi":"10.1007/s11814-024-00302-2","DOIUrl":"10.1007/s11814-024-00302-2","url":null,"abstract":"<div><p>We employed a novel approach to fabricate quantum dot-in-Prussian blue analogue (QD-in-PBA) composites, encapsulating colloidal QDs into the electrical conducting metal organic framework PBA, which could provide a robust platform for efficient photochemical modulation of photoluminescence (PL) intensity. To achieve this, the surface of the QDs was engineered by attaching ferrocyanide ligands. This surface modification enabled the QDs to be seamlessly and uniformly incorporated into the PBA matrix. The ferrocyanide ligands on the QD surfaces played a pivotal role in initiating the <i>in-situ</i> formation of PBA, facilitated by the introduction of additional ferrocyanide ions and iron (III) ions as the building blocks of PBA. Alternatively applied external voltages to the QD-in-PBA electrode within an electrochemical cell demonstrated the reversible quenching and recovery of the PL intensity of the QDs embedded within the QD-in-PBA composite. Notably, we achieved the on/off modulation ratio over 7, which could be consistently repeated across multiple cycles. In contrast, the control sample, comprising a mixture of QDs and PBA, exhibited poor stability in terms of electrochemical performance, with a reduced modulation degree observed over repeating cycles. This diminished stability can be attributed to the fact that in the control sample, the QDs were merely attached to the surface of the PBA rather than being fully incorporated within the matrix and became redispersed into the electrolyte solution during the electrochemical reactions.</p></div>","PeriodicalId":684,"journal":{"name":"Korean Journal of Chemical Engineering","volume":"41 13","pages":"3449 - 3459"},"PeriodicalIF":2.9,"publicationDate":"2024-10-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142636703","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0