Korean Journal of Chemical Engineering最新文献

Colloidal Semiconductor Cadmium Chalcogenide Nanorods and Nanoplatelets: Growth, Optical Anisotropy and Directed Assembly 胶体半导体氯化镉纳米棒和纳米片：生长、光学各向异性和定向组装

IF 2.9 4区工程技术

Korean Journal of Chemical Engineering Pub Date : 2024-11-06 DOI: 10.1007/s11814-024-00321-z

Jaeyoon Moon, Haejin Jeon, Dahin Kim

引用次数: 0

Special Issue Editorial: Colloidal Quantum Dots 特刊编辑：胶体量子点

IF 2.9 4区工程技术

Korean Journal of Chemical Engineering Pub Date : 2024-11-05 DOI: 10.1007/s11814-024-00313-z

Dahin Kim, Byeong Guk Jeong, Wan Ki Bae, Doh C. Lee

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}

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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}

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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

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}

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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}

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Preparation of Water-Dispersible Perovskite-Quantum Dots for Biomedical Applications 制备可在水中分散的 Perovskite 量子点用于生物医学应用

IF 2.9 4区工程技术

Korean Journal of Chemical Engineering Pub Date : 2024-10-19 DOI: 10.1007/s11814-024-00303-1

Sang Bin Yoon, Sukyeong Hwang, Yerin Kim, Bong-Geun Kim, Hyon Bin Na

{"title":"Preparation of Water-Dispersible Perovskite-Quantum Dots for Biomedical Applications","authors":"Sang Bin Yoon, Sukyeong Hwang, Yerin Kim, Bong-Geun Kim, Hyon Bin Na","doi":"10.1007/s11814-024-00303-1","DOIUrl":"10.1007/s11814-024-00303-1","url":null,"abstract":"<p>This review highlights recent advancements in stabilizing perovskite-quantum dots (PQDs) for biomedical applications. PQDs like CsPbBr<sub>3</sub> nanoparticles are promising due to their high photoluminescence-quantum yield, narrow emission linewidth, and ability to control excitation and emission wavelengths, making them suitable for bioimaging and sensing applications. However, their instability in moist and aqueous environments and potential toxicity due to heavy metals like lead pose significant challenges. To address these issues, various surface-modification strategies, including encapsulation, ligand exchange, and phase transfer, have been developed. These methods aim to improve PQD stability and biocompatibility while preserving their optical properties. Encapsulation techniques using polymers, silica, and phospholipids have shown promise in maintaining PQD stability in aqueous solutions. Ligand-exchange strategies with multidentate and multifunctional ligands have enhanced PQD surface binding and hydrophilicity, improving their environmental robustness. Applications such as fluorescence cellular imaging, theragnostics, and immunoassays demonstrate the potential of stabilized PQDs in biomedical applications. Despite these advancements, further research is needed to develop non-toxic PQDs and ensure long-term stability. Continued progress in PQD synthesis and surface modification could lead to significant breakthroughs in biomedical research and clinical diagnostics.</p>","PeriodicalId":684,"journal":{"name":"Korean Journal of Chemical Engineering","volume":"41 13","pages":"3345 - 3357"},"PeriodicalIF":2.9,"publicationDate":"2024-10-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142636676","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

Heavy-Metal-Free Heterostructured Nanocrystals for Light-Emitting Applications 用于发光应用的无重金属异质结构纳米晶体

IF 2.9 4区工程技术

Korean Journal of Chemical Engineering Pub Date : 2024-10-17 DOI: 10.1007/s11814-024-00305-z

Yeong Uk Kim, Dae Yun Kim, Ju Won Park, Byeong Guk Jeong

{"title":"Heavy-Metal-Free Heterostructured Nanocrystals for Light-Emitting Applications","authors":"Yeong Uk Kim, Dae Yun Kim, Ju Won Park, Byeong Guk Jeong","doi":"10.1007/s11814-024-00305-z","DOIUrl":"10.1007/s11814-024-00305-z","url":null,"abstract":"<div><p>Rising demands on environmentally benign materials lead to the development of heavy-metal-free NCs for light-emitting applications. Tremendous efforts to solve the challenges of heavy-metal-free NCs have been focused on the discovery of synthetic chemistry and photophysical properties of the NCs. This review provides a comprehensive overview of the progress in the synthesis of heavy-metal-free semiconductor NCs, mainly focusing on III–V, I–III–VI<sub>2</sub>, and II–VI groups. The progress details the discovery of their precursor chemistry and the formation of heterostructures to fit their chemical nature and photophysical properties. The continuous efforts on the structural design and synthetic chemistry reveal how exceptional properties of the NCs materialized. The remarkable progress in photophysical properties and synthetic chemistry on the NCs supports the potential of these NCs in optoelectronic applications, including light-emitting diode (LED) and solar cell, demonstrating their suitability as strong alternatives to Cd and Pb-based NCs. This review offers insights into the remaining challenges of the NCs, directing the future perspectives of the NCs.</p></div>","PeriodicalId":684,"journal":{"name":"Korean Journal of Chemical Engineering","volume":"41 13","pages":"3303 - 3315"},"PeriodicalIF":2.9,"publicationDate":"2024-10-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142636939","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}

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Recent Advances in Transfer Printing of Colloidal Quantum Dots for High-Resolution Full Color Displays 用于高分辨率全彩显示屏的胶体量子点转移印刷的最新进展

IF 2.9 4区工程技术

Korean Journal of Chemical Engineering Pub Date : 2024-10-16 DOI: 10.1007/s11814-024-00301-3

Yunho Kim, Jiwoong Yang, Moon Kee Choi

{"title":"Recent Advances in Transfer Printing of Colloidal Quantum Dots for High-Resolution Full Color Displays","authors":"Yunho Kim, Jiwoong Yang, Moon Kee Choi","doi":"10.1007/s11814-024-00301-3","DOIUrl":"10.1007/s11814-024-00301-3","url":null,"abstract":"<div><p>Quantum dots (QDs) have garnered significant attention in the advanced optoelectronic devices due to their unique luminescent properties, including size-tunable emission, high photoluminescence efficiency, exceptional chromatic purity, and superior photostability. To achieve based high-definition full-color displays, it is critical to develop a precise patterning process capable of accurately depositing red, green, and blue QD subpixels at desired locations with high resolution. Among various patterning techniques, transfer printing has emerged as a promising method for achieving high-definition pixels while preventing cross-contamination between different colored subpixels. This technique involves transferring QD patterns to a target substrate using an elastomeric stamp. This review provides a comprehensive overview of the latest research trends in three types of transfer printing processes: additive-transfer printing, subtractive-transfer printing, and intaglio-transfer printing. We examine the strengths and limitations of each technique and showcase key applications in QD light-emitting diodes that utilize transfer-printed QDs.</p></div>","PeriodicalId":684,"journal":{"name":"Korean Journal of Chemical Engineering","volume":"41 13","pages":"3469 - 3482"},"PeriodicalIF":2.9,"publicationDate":"2024-10-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142636867","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