Hyunho Choi, Sihun Park, Chunghwan Jung, Nara Jeon, Junsuk Rho, Shin-Hyun Kim
Conventional dark-tone paints absorb both visible light and near-infrared (NIR) wavelengths, posing a challenge for light detection and ranging (LiDAR) recognition in autonomous driving. To overcome this issue, various chemical and structural coating materials have been explored to selectively reflect NIR. In this study, we newly propose colloidal photonic crystals with a stopband in the NIR range, fabricated through the spontaneous formation of crystalline arrays of silica particles dispersed in a photocurable resin, as a potential solution. The stopband position is finely adjusted by controlling the volume fraction of particles, and the translucent films are rendered black by incorporating carbon black nanoparticles into the interstitial regions. By optimizing the concentration of carbon black, we achieve a balance of low visible light and high LiDAR intensity. These black photonic films demonstrate superior LiDAR intensity compared to commercial dark-tone paints and perform on par with the perylene black-deposited white coating, one of the most promising LiDAR-assistive materials currently available, under normal reflection conditions. Additionally, the photonic films are highly durable, thermally stable, nontoxic, and environmentally friendly, making them promising candidates for LiDAR-assistive coatings.
{"title":"NIR-Reflective Black Photonic Films Designed for Effective LiDAR Recognition","authors":"Hyunho Choi, Sihun Park, Chunghwan Jung, Nara Jeon, Junsuk Rho, Shin-Hyun Kim","doi":"10.1021/acsami.4c19091","DOIUrl":"https://doi.org/10.1021/acsami.4c19091","url":null,"abstract":"Conventional dark-tone paints absorb both visible light and near-infrared (NIR) wavelengths, posing a challenge for light detection and ranging (LiDAR) recognition in autonomous driving. To overcome this issue, various chemical and structural coating materials have been explored to selectively reflect NIR. In this study, we newly propose colloidal photonic crystals with a stopband in the NIR range, fabricated through the spontaneous formation of crystalline arrays of silica particles dispersed in a photocurable resin, as a potential solution. The stopband position is finely adjusted by controlling the volume fraction of particles, and the translucent films are rendered black by incorporating carbon black nanoparticles into the interstitial regions. By optimizing the concentration of carbon black, we achieve a balance of low visible light and high LiDAR intensity. These black photonic films demonstrate superior LiDAR intensity compared to commercial dark-tone paints and perform on par with the perylene black-deposited white coating, one of the most promising LiDAR-assistive materials currently available, under normal reflection conditions. Additionally, the photonic films are highly durable, thermally stable, nontoxic, and environmentally friendly, making them promising candidates for LiDAR-assistive coatings.","PeriodicalId":5,"journal":{"name":"ACS Applied Materials & Interfaces","volume":"44 1","pages":""},"PeriodicalIF":9.5,"publicationDate":"2025-01-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142988327","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2025-01-17DOI: 10.1016/j.joule.2024.12.004
Joris Bücker, R. Maria del Rio-Chanona, Anton Pichler, Matthew C. Ives, J. Doyne Farmer
We analyze the employment dynamics of a rapid decarbonization of the US power sector, reducing emissions by 95% before 2035. We couple an input-output model with an occupational mobility network and identify three labor market phases: “scale-up,” “scale-down,” and a long-term, low-carbon, “steady state.” During the scale-up (2023–2034), for every job lost in an industry, 12 new jobs are created elsewhere. However, few occupations see sustained growth throughout the transition. We predict that skill mismatches will create frictions during the transition, especially in the scale-down phase. Compared with the size and fluctuations of the US labor market, the impact of this transition is modest, particularly if the US increases exports of clean energy technologies to counteract the domestic scale-down phase. However, without proper planning, rapidly growing industries will struggle to find skilled labor during the scale-up phase, while displaced workers might struggle finding jobs during the scale-down phase.
{"title":"Employment dynamics in a rapid decarbonization of the US power sector","authors":"Joris Bücker, R. Maria del Rio-Chanona, Anton Pichler, Matthew C. Ives, J. Doyne Farmer","doi":"10.1016/j.joule.2024.12.004","DOIUrl":"https://doi.org/10.1016/j.joule.2024.12.004","url":null,"abstract":"We analyze the employment dynamics of a rapid decarbonization of the US power sector, reducing emissions by 95% before 2035. We couple an input-output model with an occupational mobility network and identify three labor market phases: “scale-up,” “scale-down,” and a long-term, low-carbon, “steady state.” During the scale-up (2023–2034), for every job lost in an industry, 12 new jobs are created elsewhere. However, few occupations see sustained growth throughout the transition. We predict that skill mismatches will create frictions during the transition, especially in the scale-down phase. Compared with the size and fluctuations of the US labor market, the impact of this transition is modest, particularly if the US increases exports of clean energy technologies to counteract the domestic scale-down phase. However, without proper planning, rapidly growing industries will struggle to find skilled labor during the scale-up phase, while displaced workers might struggle finding jobs during the scale-down phase.","PeriodicalId":343,"journal":{"name":"Joule","volume":"77 1","pages":""},"PeriodicalIF":39.8,"publicationDate":"2025-01-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142987413","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
This paper provides sustainable solutions for the urban mining of end-of-life (EOL) batteries and highlights their significant role in advancing the circular economy. Influenced by geopolitics and investment strategies, establishing a sustainable supply chain can create cost-saving opportunities while meeting the rising demand for battery materials. Urban mining, by recycling valuable metals from EOL batteries, can considerably reduce reliance on new raw materials by providing sustainable resources, thereby facilitating a cleaner energy transition. The research also emphasizes the importance of traceability and emerging innovations, such as the battery passport, which enhance transparency in the supply chain. Additionally, it explores the recycling industry's potential through techno-economic assessments to improve lithium-ion battery (LIB) recycling. Despite the challenges faced by different segments of the battery value chain, commercialization and technological advancements present promising opportunities for future development. The emergence of new battery systems or chemistries, such as sodium-ion, solid-state, and lithium-iron-phosphate batteries, must be considered in the further adaptation of existing plants. In conclusion, this paper discusses how the circular economy and urban mining can drive a sustainable, profitable, and resilient future for the LIB industry, ensuring an efficient and environmentally sound approach to the battery revolution.
{"title":"Advancing the Circular Economy by Driving Sustainable Urban Mining of End-of-Life Batteries and Technological Advancements","authors":"Mina Rezaei, Atiyeh Nekahi, Ebrahim Feyzi, Anil Kumar MR, Jagjit Nanda, Karim Zaghib","doi":"10.1016/j.ensm.2025.104035","DOIUrl":"https://doi.org/10.1016/j.ensm.2025.104035","url":null,"abstract":"This paper provides sustainable solutions for the urban mining of end-of-life (EOL) batteries and highlights their significant role in advancing the circular economy. Influenced by geopolitics and investment strategies, establishing a sustainable supply chain can create cost-saving opportunities while meeting the rising demand for battery materials. Urban mining, by recycling valuable metals from EOL batteries, can considerably reduce reliance on new raw materials by providing sustainable resources, thereby facilitating a cleaner energy transition. The research also emphasizes the importance of traceability and emerging innovations, such as the battery passport, which enhance transparency in the supply chain. Additionally, it explores the recycling industry's potential through techno-economic assessments to improve lithium-ion battery (LIB) recycling. Despite the challenges faced by different segments of the battery value chain, commercialization and technological advancements present promising opportunities for future development. The emergence of new battery systems or chemistries, such as sodium-ion, solid-state, and lithium-iron-phosphate batteries, must be considered in the further adaptation of existing plants. In conclusion, this paper discusses how the circular economy and urban mining can drive a sustainable, profitable, and resilient future for the LIB industry, ensuring an efficient and environmentally sound approach to the battery revolution.","PeriodicalId":306,"journal":{"name":"Energy Storage Materials","volume":"8 1","pages":""},"PeriodicalIF":20.4,"publicationDate":"2025-01-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142987481","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2025-01-17DOI: 10.1021/acs.nanolett.4c04733
Xianbin Wei, Cheng Zhen, Menghao Li, Zhen Zhang, Xuming Yang, M. Danny Gu
Constructing feasible sodium metal batteries (SMBs) faces complex challenges in stabilizing cathodes and sodium metal anodes. It is imperative, but often underemphasized, to simultaneously regulate the solid–electrolyte interphase (SEI) to counter dendrite growth and the cathode–electrolyte interphase (CEI) to mitigate cathode deterioration. Herein, we introduce lithium 2-trifluoromethyl-4,5-dicyanoimidazolide (LiTDI) as an efficacious additive in a carbonate-based electrolyte to extend cycle lifespan of full SMBs: the capacity retention reaches 77.8% after 8000 cycles at room temperature and 74.3% after 5000 cycles at 50 °C. Cryogenic transmission electron microscopy characterization reveals that LiTDI promotes formation of inorganics-condensed SEI and CEI. The former inhibits continuous electrolyte decomposition and ensures homogeneous sodium plating, while the latter shields cathode from transition metal dissolution. This study highlights the crucial role of LiTDI in stabilizing both anodes and cathodes in SMBs, and it provides insights into designing functional additives for synergistic modulation of SEI and CEI.
{"title":"Synergistic Modulation of Solid– and Cathode–Electrolyte Interphase via a Lithium Salt Additive toward Stable Sodium Metal Batteries","authors":"Xianbin Wei, Cheng Zhen, Menghao Li, Zhen Zhang, Xuming Yang, M. Danny Gu","doi":"10.1021/acs.nanolett.4c04733","DOIUrl":"https://doi.org/10.1021/acs.nanolett.4c04733","url":null,"abstract":"Constructing feasible sodium metal batteries (SMBs) faces complex challenges in stabilizing cathodes and sodium metal anodes. It is imperative, but often underemphasized, to simultaneously regulate the solid–electrolyte interphase (SEI) to counter dendrite growth and the cathode–electrolyte interphase (CEI) to mitigate cathode deterioration. Herein, we introduce lithium 2-trifluoromethyl-4,5-dicyanoimidazolide (LiTDI) as an efficacious additive in a carbonate-based electrolyte to extend cycle lifespan of full SMBs: the capacity retention reaches 77.8% after 8000 cycles at room temperature and 74.3% after 5000 cycles at 50 °C. Cryogenic transmission electron microscopy characterization reveals that LiTDI promotes formation of inorganics-condensed SEI and CEI. The former inhibits continuous electrolyte decomposition and ensures homogeneous sodium plating, while the latter shields cathode from transition metal dissolution. This study highlights the crucial role of LiTDI in stabilizing both anodes and cathodes in SMBs, and it provides insights into designing functional additives for synergistic modulation of SEI and CEI.","PeriodicalId":53,"journal":{"name":"Nano Letters","volume":"27 1","pages":""},"PeriodicalIF":10.8,"publicationDate":"2025-01-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142987567","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Wojciech Wieczorek, Tomasz Mazur, Weronika Górka-Kumik, Paweł Dąbczyński, Agnieszka Podborska, Andrzej Bernasik, Michał Szuwarzyński
Here, the fabrication method of ultrathin Zener diodes is presented utilizing a novel hybrid system of zinc sulfide (ZnS) nanoparticles embedded within a poly(methacrylic acid) (PMAA) matrix, surface-grafted via ARGET-ATRP polymerization. The controlled polymerization method facilitates precise control over layer thickness, while the in situ synthesis of ZnS nanoparticles ensures uniform coverage throughout the polymer matrix. The obtained hybrid systems with nanometric thickness (<40 nm) are characterized by diode conductivity with a clear breakdown characteristic of the Zener system. The obtained ultra-thin layers on p-doped silicon, in addition to their electrical characteristics, are studied using an atomic force microscope (AFM) and secondary ion mass spectrometry (SIMS) to examine the structure and composition of a hybrid polymer-nanoparticle system.
{"title":"Ultrathin High-Efficiency Zener Diode Fabricated Using Organized ZnS Nanoparticles in Surface-Grafted Poly(methacrylic acid) Matrix","authors":"Wojciech Wieczorek, Tomasz Mazur, Weronika Górka-Kumik, Paweł Dąbczyński, Agnieszka Podborska, Andrzej Bernasik, Michał Szuwarzyński","doi":"10.1002/aelm.202400772","DOIUrl":"https://doi.org/10.1002/aelm.202400772","url":null,"abstract":"Here, the fabrication method of ultrathin Zener diodes is presented utilizing a novel hybrid system of zinc sulfide (ZnS) nanoparticles embedded within a poly(methacrylic acid) (PMAA) matrix, surface-grafted via ARGET-ATRP polymerization. The controlled polymerization method facilitates precise control over layer thickness, while the in situ synthesis of ZnS nanoparticles ensures uniform coverage throughout the polymer matrix. The obtained hybrid systems with nanometric thickness (<40 nm) are characterized by diode conductivity with a clear breakdown characteristic of the Zener system. The obtained ultra-thin layers on p-doped silicon, in addition to their electrical characteristics, are studied using an atomic force microscope (AFM) and secondary ion mass spectrometry (SIMS) to examine the structure and composition of a hybrid polymer-nanoparticle system.","PeriodicalId":110,"journal":{"name":"Advanced Electronic Materials","volume":"23 1","pages":""},"PeriodicalIF":6.2,"publicationDate":"2025-01-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142987623","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Obesity, a chronic metabolic disorder characterized by excessive body weight and adipose tissue accumulation, is intricately linked to a spectrum of health complications. It is driven by a confluence of factors, including gut microbiota dysbiosis, inflammation, and oxidative stress, which are pivotal in its pathogenesis. A multifaceted therapeutic strategy that targets these interrelated pathways is essential for effective obesity management. In this context, biomass-derived carbon dots have emerged as a promising avenue due to their diverse biological activities and potential in nanomedicine. Our study presents the synthesis of multi-modal hawthorn carbon dots (HCD), employing a green hydrothermal carbonization method that diverged from traditional stir-frying techniques. This eco-friendly approach facilitates the preparation of HCD, emphasizing the role of sugar compounds as the primary carbon source in their formation. In vitro assays demonstrate that HCD possess potent anti-inflammatory and antioxidant properties, which are crucial in combating the oxidative stress and inflammation associated with obesity. We further investigate the impact of HCD intervention in a high-fat diet (HFD)-induced obesity mouse model, employing both post-modeling and simultaneous modeling administration strategies. Our findings reveal that HCD treatment significantly reduces body weight and hepatic lipid accumulation in HFD mice, concurrently enhancing glucose tolerance and alleviating insulin resistance. Moreover, antibiotic perturbation experiments, complemented by bioinformatics analysis of colon microbiota, indicate that HCD substantially modulate gut microbiota composition. This modulation is associated with the amelioration of obesity-related conditions, suggesting that HCD may exert their beneficial effects through the regulation of gut microbiota, in addition to their anti-inflammatory and antioxidant activities. These multimodal mechanisms of action position HCD as a promising candidate for the prevention and treatment of obesity, offering a novel therapeutic strategy that targets the complex interplay of factors involved in this metabolic disorder.
{"title":"Hawthorn carbon dots: a novel therapeutic agent for modulating body weight and hepatic lipid profiles in high-fat diet-fed mice","authors":"Shuai Lin, Yu-jun Zheng, Yi-ze Xu, Yang Zhou, Xin He, Chun-feng Zhang, Chun-su Yuan","doi":"10.1039/d4nr04486j","DOIUrl":"https://doi.org/10.1039/d4nr04486j","url":null,"abstract":"Obesity, a chronic metabolic disorder characterized by excessive body weight and adipose tissue accumulation, is intricately linked to a spectrum of health complications. It is driven by a confluence of factors, including gut microbiota dysbiosis, inflammation, and oxidative stress, which are pivotal in its pathogenesis. A multifaceted therapeutic strategy that targets these interrelated pathways is essential for effective obesity management. In this context, biomass-derived carbon dots have emerged as a promising avenue due to their diverse biological activities and potential in nanomedicine. Our study presents the synthesis of multi-modal hawthorn carbon dots (HCD), employing a green hydrothermal carbonization method that diverged from traditional stir-frying techniques. This eco-friendly approach facilitates the preparation of HCD, emphasizing the role of sugar compounds as the primary carbon source in their formation. <em>In vitro</em> assays demonstrate that HCD possess potent anti-inflammatory and antioxidant properties, which are crucial in combating the oxidative stress and inflammation associated with obesity. We further investigate the impact of HCD intervention in a high-fat diet (HFD)-induced obesity mouse model, employing both post-modeling and simultaneous modeling administration strategies. Our findings reveal that HCD treatment significantly reduces body weight and hepatic lipid accumulation in HFD mice, concurrently enhancing glucose tolerance and alleviating insulin resistance. Moreover, antibiotic perturbation experiments, complemented by bioinformatics analysis of colon microbiota, indicate that HCD substantially modulate gut microbiota composition. This modulation is associated with the amelioration of obesity-related conditions, suggesting that HCD may exert their beneficial effects through the regulation of gut microbiota, in addition to their anti-inflammatory and antioxidant activities. These multimodal mechanisms of action position HCD as a promising candidate for the prevention and treatment of obesity, offering a novel therapeutic strategy that targets the complex interplay of factors involved in this metabolic disorder.","PeriodicalId":92,"journal":{"name":"Nanoscale","volume":"95 1","pages":""},"PeriodicalIF":6.7,"publicationDate":"2025-01-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142987652","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}
The graphite industry is currently facing significant supply and demand issues owing to the sudden rise in electric vehicle (EV) usage; however, the lithium-ion batteries (LIB) that power such vehicles will be landfilled or incinerated at the end of their lifetime, raising questions concerning their environmental impact and resource reuse. The recycling of spent LIBs using economical and environmentally sustainable technologies is therefore required. We therefore employ three different strategies to regenerate graphite from spent LIBs as an anode material in new LIBs. Acid (Gr-AcOH), alkali (Gr-KOH), and gas (Gr-N2) treatments are used to reconstruct the structure of the spent graphite, which is then evaluated as an anode material in a half-cell configuration. The graphite regenerated by the Gr-AcOH, Gr-KOH, and Gr-N2 techniques exhibit delithiation capacities of 328, 325, and 338 mA h ggr–1, respectively, after 150 cycles, with a Coulombic efficiency of ~99.9%. These delithiation capacities are considerably higher than that of untreated spent graphite (120 mA h ggr–1, where 'gr' in the subscript stands for graphite) and close to that of commercial graphite (345 mA h ggr–1). Additionally, our life cycle assessment estimates the impact of graphite regeneration ranges from 0.27 to 3.53 kg CO2e per kg graphite, assuming a pilot-scale operation using 100 kg graphite operation. This study demonstrates the suitability of environmentally sustainable graphite recycling for LIB applications, and the implementation of circular approaches for battery anode recycling.
{"title":"Environmentally Friendly Regeneration of Graphite from Spent Lithium-Ion Batteries for Sustainable Anode Material Reuse","authors":"Subramanian Natarajan, Tomotaro Mae, Heng Yi Teah, Hiroki Sakurai, Suguru Noda","doi":"10.1039/d4ta07618d","DOIUrl":"https://doi.org/10.1039/d4ta07618d","url":null,"abstract":"The graphite industry is currently facing significant supply and demand issues owing to the sudden rise in electric vehicle (EV) usage; however, the lithium-ion batteries (LIB) that power such vehicles will be landfilled or incinerated at the end of their lifetime, raising questions concerning their environmental impact and resource reuse. The recycling of spent LIBs using economical and environmentally sustainable technologies is therefore required. We therefore employ three different strategies to regenerate graphite from spent LIBs as an anode material in new LIBs. Acid (Gr-AcOH), alkali (Gr-KOH), and gas (Gr-N2) treatments are used to reconstruct the structure of the spent graphite, which is then evaluated as an anode material in a half-cell configuration. The graphite regenerated by the Gr-AcOH, Gr-KOH, and Gr-N2 techniques exhibit delithiation capacities of 328, 325, and 338 mA h ggr–1, respectively, after 150 cycles, with a Coulombic efficiency of ~99.9%. These delithiation capacities are considerably higher than that of untreated spent graphite (120 mA h ggr–1, where 'gr' in the subscript stands for graphite) and close to that of commercial graphite (345 mA h ggr–1). Additionally, our life cycle assessment estimates the impact of graphite regeneration ranges from 0.27 to 3.53 kg CO2e per kg graphite, assuming a pilot-scale operation using 100 kg graphite operation. This study demonstrates the suitability of environmentally sustainable graphite recycling for LIB applications, and the implementation of circular approaches for battery anode recycling.","PeriodicalId":82,"journal":{"name":"Journal of Materials Chemistry A","volume":"30 1","pages":""},"PeriodicalIF":11.9,"publicationDate":"2025-01-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142987865","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Metal–organic frameworks (MOFs) are rigorously investigated as promising candidates for CO2 capture and conversion. MOF-on-MOF heterostructures integrate bolstered charger carrier separation with the intrinsic advantages of MOF components, exhibiting immense potential to substantially escalate the efficiency of photocatalytic CO2 reduction (CO2RR). However, the structural and compositional complexity poses significant challenges to the controllable development of these heterostructures. Herein, a conventional MOF-on-MOF nanocomposite is readily optimized from a type II heterojunction to a state-of-the-art cascade Z-scheme configuration via the encapsulation of Pt nanoparticles (Pt NPs), establishing synergistic MOF-MOF and metal-MOF heterojunctions with reinforced built-in electric field. A cascade electron flow is thus propelled, vigorously separating the photogenerated charge carriers and profoundly extending their lifetimes. Collectively, the photocatalytic activity of the cascade Z-scheme is drastically promoted, exhibiting a nearly quintuple enhancement in the CO production rate over the original type II heterostructure. Moreover, the anti-sintering capacity of the developed nanocomposite is unveiled, elucidating its simultaneously improved activity and stability. These findings present unprecedented regulation over the configuration of a MOF-on-MOF heterojunction, substantially enriching the fundamental understanding and rational design strategies of composite materials.
{"title":"Beyond Tradition: A MOF-On-MOF Cascade Z-Scheme Heterostructure for Augmented CO2 Photoreduction","authors":"Ruipeng Jin, Rui Li, Ming-Li Ma, Da-Yu Chen, Jian-Yu Zhang, Zheng-He Xie, Li-Feng Ding, Yabo Xie, Jian-Rong Li","doi":"10.1002/smll.202409759","DOIUrl":"https://doi.org/10.1002/smll.202409759","url":null,"abstract":"Metal–organic frameworks (MOFs) are rigorously investigated as promising candidates for CO<sub>2</sub> capture and conversion. MOF-on-MOF heterostructures integrate bolstered charger carrier separation with the intrinsic advantages of MOF components, exhibiting immense potential to substantially escalate the efficiency of photocatalytic CO<sub>2</sub> reduction (CO<sub>2</sub>RR). However, the structural and compositional complexity poses significant challenges to the controllable development of these heterostructures. Herein, a conventional MOF-on-MOF nanocomposite is readily optimized from a type II heterojunction to a state-of-the-art cascade Z-scheme configuration via the encapsulation of Pt nanoparticles (Pt NPs), establishing synergistic MOF-MOF and metal-MOF heterojunctions with reinforced built-in electric field. A cascade electron flow is thus propelled, vigorously separating the photogenerated charge carriers and profoundly extending their lifetimes. Collectively, the photocatalytic activity of the cascade Z-scheme is drastically promoted, exhibiting a nearly quintuple enhancement in the CO production rate over the original type II heterostructure. Moreover, the anti-sintering capacity of the developed nanocomposite is unveiled, elucidating its simultaneously improved activity and stability. These findings present unprecedented regulation over the configuration of a MOF-on-MOF heterojunction, substantially enriching the fundamental understanding and rational design strategies of composite materials.","PeriodicalId":228,"journal":{"name":"Small","volume":"55 1","pages":""},"PeriodicalIF":13.3,"publicationDate":"2025-01-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142988107","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Waste management of plastic and electronic artefacts is a very tedious task and requires a great deal of expense. The pressing threat to the environment due to excessive plastic use and uncategorized electronic waste management demands versatile strategies to mitigate the said issues. Herein, we have showcased a very economical and straightforward approach to utilize plastic and electronic waste for designing a triboelectric nanogenerator (TENG). Polyethylene terephthalate (PET) recovered from used Kapton tape and the printing paper were utilized as triboelectric layers. More importantly, for the fabrication of the electrode layers, sophisticated and expansive techniques were replaced by a simple sacrificial electrodeposition of copper. Discarded electric wires from damaged UPS batteries were used as the source of copper. The fabricated TENG delivered excellent electric output with a maximum open circuit voltage of ~552 V, a short circuit current of 18.8 µA and a high-power density of 7.68 W m-2 under contact-separation triggered by human hand tapping. A vast number of practical demonstrations include the successful lighting of the 472 LEDs connected in series, storing the charges in commercial capacitors, and powering the digital calculator. Further, we have showcased the potential application of e-Cu@WPP-TENG to power the LED panels of advertisement boards, logos, nameplates, etc. of hotels, restaurants, buildings, laboratories, and homes, etc. We believe that this work stresses the importance of implementing economically viable strategies for utilizing plastic and electronic waste to harvest valuable energy.
{"title":"Economical 550 V energy harvesting from plastic and electronic wastes using human bodily motions","authors":"Man Singh, Sameer Kumar, Alankar Kafle, Kalpana Garg, Tharamani Chikka Nagaiah, Parimal Sharma, Chandupatla Chakradhar Reddy","doi":"10.1039/d4ta07070d","DOIUrl":"https://doi.org/10.1039/d4ta07070d","url":null,"abstract":"Waste management of plastic and electronic artefacts is a very tedious task and requires a great deal of expense. The pressing threat to the environment due to excessive plastic use and uncategorized electronic waste management demands versatile strategies to mitigate the said issues. Herein, we have showcased a very economical and straightforward approach to utilize plastic and electronic waste for designing a triboelectric nanogenerator (TENG). Polyethylene terephthalate (PET) recovered from used Kapton tape and the printing paper were utilized as triboelectric layers. More importantly, for the fabrication of the electrode layers, sophisticated and expansive techniques were replaced by a simple sacrificial electrodeposition of copper. Discarded electric wires from damaged UPS batteries were used as the source of copper. The fabricated TENG delivered excellent electric output with a maximum open circuit voltage of ~552 V, a short circuit current of 18.8 µA and a high-power density of 7.68 W m-2 under contact-separation triggered by human hand tapping. A vast number of practical demonstrations include the successful lighting of the 472 LEDs connected in series, storing the charges in commercial capacitors, and powering the digital calculator. Further, we have showcased the potential application of e-Cu@WPP-TENG to power the LED panels of advertisement boards, logos, nameplates, etc. of hotels, restaurants, buildings, laboratories, and homes, etc. We believe that this work stresses the importance of implementing economically viable strategies for utilizing plastic and electronic waste to harvest valuable energy.","PeriodicalId":82,"journal":{"name":"Journal of Materials Chemistry A","volume":"77 1","pages":""},"PeriodicalIF":11.9,"publicationDate":"2025-01-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142988321","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Chan Yeol Lee, Ji Yun Jeong, Hye Jeong Nam, Cheol Am Hong
Recent studies have reported that the cause and progression of many diseases are closely related to complex and diverse gene regulation involving multiple microRNAs (miRNAs). However, most existing methods for miRNA detection typically deal with one sample at a time, which limits the achievement of high diagnostic accuracy for diseases associated with multiple gene dysregulations. Herein, we develop a liquid flow-based microfluidic optical assay for the simple and reliable detection of two different target miRNAs simultaneously at room temperature without any enzymatic reactions. This assay utilizes the catalytic hairpin assembly cycling reaction in a mixture containing four types of hairpin DNAs to amplify two different dimeric DNA probes, each of which specifically recognizes one of the two different target miRNAs. The resultant two dimeric DNA probes effectively hybridize with anchor DNA grafted into two outlet channels of a microfluidic device, thus enabling i-motif-driven compact DNA hydrogels to form in the channels under acidic conditions. With this setup, the presence of two target miRNAs can be confirmed by the naked-eye observation of red-colored gold nanoparticles encountering a flow blockage in the two outlet channels. Notably, the developed assay demonstrates sensitive and sequence-specific detection that can precisely distinguish a single base mismatch mutant miRNA within 1.5 h. Our assay thus has the potential to serve as a powerful sensing platform for the simple and simultaneous detection of multiple miRNAs in clinical diagnostics at room temperature without analytic equipment or enzymatic reactions.
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