Pub Date : 2024-09-14DOI: 10.1016/j.mtchem.2024.102281
Seyed Shahrooz Zargarian, Barbara Kupikowska-Stobba, Alicja Kosik-Kozioł, Magdalena Bartolewska, Anna Zakrzewska, Daniel Rybak, Kamil Bochenek, Magdalena Osial, Filippo Pierini
Functional antibacterial textiles fabricated from a hybrid of organic waste-derived and bio-inspired materials offer sustainable solutions for preventing microbial infections. In this work, we developed a novel antibacterial textile created through the valorization of spent coffee grounds (SCG). Electrospinning and electrospraying techniques were employed to integrate the biowaste within a polymeric nanofiber matrix, ensuring uniform particle distribution and providing structural support for enhanced applicability. Modification with polydopamine (PDA) significantly enhanced the textile's photothermal performance. Specific attention was paid to understanding the relation between temperature change and key variables, including the surrounding liquid volume, textile layer stacking, and applied laser power. Developed platforms demonstrated excellent photothermal stability. While the SCG-based textile demonstrated exceptional biocompatibility, the PDA-modified textile effectively eradicated () under near-infrared (NIR) irradiation. The developed textiles in our work demonstrate a dynamic balance between biocompatibility and on-demand antibacterial functionality, offering adaptable solutions in accordance with the desired application.
{"title":"Light-responsive biowaste-derived and bio-inspired textiles: Dancing between bio-friendliness and antibacterial functionality","authors":"Seyed Shahrooz Zargarian, Barbara Kupikowska-Stobba, Alicja Kosik-Kozioł, Magdalena Bartolewska, Anna Zakrzewska, Daniel Rybak, Kamil Bochenek, Magdalena Osial, Filippo Pierini","doi":"10.1016/j.mtchem.2024.102281","DOIUrl":"https://doi.org/10.1016/j.mtchem.2024.102281","url":null,"abstract":"Functional antibacterial textiles fabricated from a hybrid of organic waste-derived and bio-inspired materials offer sustainable solutions for preventing microbial infections. In this work, we developed a novel antibacterial textile created through the valorization of spent coffee grounds (SCG). Electrospinning and electrospraying techniques were employed to integrate the biowaste within a polymeric nanofiber matrix, ensuring uniform particle distribution and providing structural support for enhanced applicability. Modification with polydopamine (PDA) significantly enhanced the textile's photothermal performance. Specific attention was paid to understanding the relation between temperature change and key variables, including the surrounding liquid volume, textile layer stacking, and applied laser power. Developed platforms demonstrated excellent photothermal stability. While the SCG-based textile demonstrated exceptional biocompatibility, the PDA-modified textile effectively eradicated () under near-infrared (NIR) irradiation. The developed textiles in our work demonstrate a dynamic balance between biocompatibility and on-demand antibacterial functionality, offering adaptable solutions in accordance with the desired application.","PeriodicalId":18353,"journal":{"name":"Materials Today Chemistry","volume":"18 1","pages":""},"PeriodicalIF":7.3,"publicationDate":"2024-09-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142257728","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-09-14DOI: 10.1016/j.mtchem.2024.102310
Jiaying Zou, Qiaolan Yu, Dan Cao, Qianer Wang, Na Ma, Wei Dai
Levofloxacin (LVX) capture with microcrystalline particles of monometallic metal-organic frameworks (MOFs) is definitely restricted and challenged by its difficulties in solid-liquid separation and enhanced of adsorption capacity issues. Meanwhile, the development of magnetic MOFs with excellent adsorption capabilities and outstanding recyclability is crucial. Herein, a novel magnetic Fe/Ni bimetal MOFs composite (MIL-101(Fe)@NiFeO, MNFO) for LVX capture has been effectively fabricated for LVX capture, utilizing MIL-101(Fe) as the primary adsorbent and NiFeO nanoparticles as the magnetic element. Attributed to the synergistic ability of bimetal ions (Fe and Ni), MNFO exhibits a significant adsorption capacity (335 mg/g) and rapid adsorption rate (10 min) towards LVX. The adsorption capacity indicates an increasing-then-decreasing trend with an increase of the pH values. Additionally, the adsorption data are well fitted by the Freundlich and pseudo-second-order kinetic models. Thermodynamic studies indicated that the adsorption process was spontaneous and endothermic. In addition, the adsorbent demonstrated excellent reusability, as it could be readily recovered from the liquid phase through the magnetic properties of NiFeO. Remarkably, it retained approximately 90 % of its adsorption capacity of the uptakes after 5 cycles. This study offers a innovative approach to the development of highly efficient adsorbents for capturing LVX from water.
{"title":"NiFe2O4 magnetic nanoparticles supported on MIL-101(Fe) as bimetallic adsorbent for boosted capture ability toward levofloxacin","authors":"Jiaying Zou, Qiaolan Yu, Dan Cao, Qianer Wang, Na Ma, Wei Dai","doi":"10.1016/j.mtchem.2024.102310","DOIUrl":"https://doi.org/10.1016/j.mtchem.2024.102310","url":null,"abstract":"Levofloxacin (LVX) capture with microcrystalline particles of monometallic metal-organic frameworks (MOFs) is definitely restricted and challenged by its difficulties in solid-liquid separation and enhanced of adsorption capacity issues. Meanwhile, the development of magnetic MOFs with excellent adsorption capabilities and outstanding recyclability is crucial. Herein, a novel magnetic Fe/Ni bimetal MOFs composite (MIL-101(Fe)@NiFeO, MNFO) for LVX capture has been effectively fabricated for LVX capture, utilizing MIL-101(Fe) as the primary adsorbent and NiFeO nanoparticles as the magnetic element. Attributed to the synergistic ability of bimetal ions (Fe and Ni), MNFO exhibits a significant adsorption capacity (335 mg/g) and rapid adsorption rate (10 min) towards LVX. The adsorption capacity indicates an increasing-then-decreasing trend with an increase of the pH values. Additionally, the adsorption data are well fitted by the Freundlich and pseudo-second-order kinetic models. Thermodynamic studies indicated that the adsorption process was spontaneous and endothermic. In addition, the adsorbent demonstrated excellent reusability, as it could be readily recovered from the liquid phase through the magnetic properties of NiFeO. Remarkably, it retained approximately 90 % of its adsorption capacity of the uptakes after 5 cycles. This study offers a innovative approach to the development of highly efficient adsorbents for capturing LVX from water.","PeriodicalId":18353,"journal":{"name":"Materials Today Chemistry","volume":"194 1","pages":""},"PeriodicalIF":7.3,"publicationDate":"2024-09-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142257730","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-09-13DOI: 10.1016/j.mtchem.2024.102303
Zeshan Sun, Peng Kong, He Gui, Zhiyuan Chen, Yu Song, Yao Wang, Yanxin Wang, Matt J. Kipper, Jianguo Tang, Linjun Huang
As a kind of artificial bionic membrane, smart response membrane can respond to the stimulus signals in the environment by the principle of bionic technology. Graphene oxide (GO) has a unique functional group and material structure, which makes it exhibit distinctive performance characteristics in smart response membranes, and smart response membranes prepared by using GO are characterized by highly sensitive response and intelligent tunability. This paper introduces the preparation method, response mechanism, performance characteristics, and application areas of GO-based smart response membranes. The GO-based smart response membranes are classified into physical response and chemical response according to the type of response, where physical response includes light response, temperature response, humidity response, and pressure response, and chemical response includes pH response, molecular/ionic response, and CO gas response. The article highlights the outstanding performance advantages and application examples of various smart response membranes, and discusses two new functional GO-based smart response membranes with self-cleaning and self-repair. Finally, the article comprehensively evaluates the performance of various smart response membranes, and looks forward to the future development of GO smart response membranes, expecting to explore a brighter development direction in this research field and contribute to human life, industrial development, and high-tech progress.
智能响应膜作为一种人工仿生膜，能够利用仿生技术原理对环境中的刺激信号做出响应。氧化石墨烯（GO）具有独特的官能团和材料结构，使其在智能响应膜中表现出与众不同的性能特征，利用GO制备的智能响应膜具有高灵敏响应和智能可调性的特点。本文介绍了基于 GO 的智能响应膜的制备方法、响应机理、性能特点和应用领域。GO基智能响应膜按响应类型分为物理响应和化学响应，其中物理响应包括光响应、温度响应、湿度响应和压力响应，化学响应包括pH响应、分子/离子响应和CO气体响应。文章重点介绍了各种智能响应膜的突出性能优势和应用实例，并讨论了两种基于 GO 的具有自清洁和自修复功能的新型智能响应膜。最后，文章全面评价了各种智能响应膜的性能，并对 GO 智能响应膜的未来发展进行了展望，期望能在该研究领域探索出更光明的发展方向，为人类生活、工业发展和高科技进步做出贡献。
{"title":"Recent advances in the preparation and application of graphene oxide smart response membranes","authors":"Zeshan Sun, Peng Kong, He Gui, Zhiyuan Chen, Yu Song, Yao Wang, Yanxin Wang, Matt J. Kipper, Jianguo Tang, Linjun Huang","doi":"10.1016/j.mtchem.2024.102303","DOIUrl":"https://doi.org/10.1016/j.mtchem.2024.102303","url":null,"abstract":"As a kind of artificial bionic membrane, smart response membrane can respond to the stimulus signals in the environment by the principle of bionic technology. Graphene oxide (GO) has a unique functional group and material structure, which makes it exhibit distinctive performance characteristics in smart response membranes, and smart response membranes prepared by using GO are characterized by highly sensitive response and intelligent tunability. This paper introduces the preparation method, response mechanism, performance characteristics, and application areas of GO-based smart response membranes. The GO-based smart response membranes are classified into physical response and chemical response according to the type of response, where physical response includes light response, temperature response, humidity response, and pressure response, and chemical response includes pH response, molecular/ionic response, and CO gas response. The article highlights the outstanding performance advantages and application examples of various smart response membranes, and discusses two new functional GO-based smart response membranes with self-cleaning and self-repair. Finally, the article comprehensively evaluates the performance of various smart response membranes, and looks forward to the future development of GO smart response membranes, expecting to explore a brighter development direction in this research field and contribute to human life, industrial development, and high-tech progress.","PeriodicalId":18353,"journal":{"name":"Materials Today Chemistry","volume":"41 1","pages":""},"PeriodicalIF":7.3,"publicationDate":"2024-09-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142257731","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
This review provides an overview of research on wound dressings, highlighting the potential of collagen-based materials for future wound management. Collagen, known for its biodegradability and biocompatibility, holds promise for wound healing. However, challenges such as poor mechanical properties, stability, and the lack of antibacterial properties when using collagen alone have led to the development of various solutions. The review discusses different types of collagen-based dressings, their preparation methods, and how their internal structure influences their ability to accelerate the healing of different wound types. Additionally, the article emphasizes the significant potential for the application of collagen dressings in future skin tissue engineering and in vivo tissue engineering. Specifically, three-dimensional scaffolds prepared from nanofibers through electrospinning show promise for more efficient collagen-based wound dressings, as these nanofibers have a similar extracellular matrix structure and high specific surface area, which can stimulate tissue hemostasis and promote cell adhesion, proliferation, and differentiation. However, challenges such as high production costs and poor stability in the commercial production of nanofibers need to be addressed. Overall, collagen dressings hold great promise for future applications and can play a significant role in skin tissue engineering and even in vivo tissue engineering.
{"title":"The potential of collagen-based materials for wound management","authors":"Ruoying Zhu, Zhengyuan Huang, Jiayu Zhang, Guigang Shi, Xiaomeng Cai, Rui Dou, Jiaruo Tang, Cuiping Zhang, Yifan Zhao, Jun Chen","doi":"10.1016/j.mtchem.2024.102295","DOIUrl":"https://doi.org/10.1016/j.mtchem.2024.102295","url":null,"abstract":"This review provides an overview of research on wound dressings, highlighting the potential of collagen-based materials for future wound management. Collagen, known for its biodegradability and biocompatibility, holds promise for wound healing. However, challenges such as poor mechanical properties, stability, and the lack of antibacterial properties when using collagen alone have led to the development of various solutions. The review discusses different types of collagen-based dressings, their preparation methods, and how their internal structure influences their ability to accelerate the healing of different wound types. Additionally, the article emphasizes the significant potential for the application of collagen dressings in future skin tissue engineering and in vivo tissue engineering. Specifically, three-dimensional scaffolds prepared from nanofibers through electrospinning show promise for more efficient collagen-based wound dressings, as these nanofibers have a similar extracellular matrix structure and high specific surface area, which can stimulate tissue hemostasis and promote cell adhesion, proliferation, and differentiation. However, challenges such as high production costs and poor stability in the commercial production of nanofibers need to be addressed. Overall, collagen dressings hold great promise for future applications and can play a significant role in skin tissue engineering and even in vivo tissue engineering.","PeriodicalId":18353,"journal":{"name":"Materials Today Chemistry","volume":"207 1","pages":""},"PeriodicalIF":7.3,"publicationDate":"2024-09-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142257732","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
The compelling global warming crisis as well as extraterrestrial artificial light synthesis craves photocatalytic reduction of CO into fuels and value-added chemicals, for which efficient and robust catalysts with high selectivity and conversion rate is a prerequisite but hitherto a rarity. Herein we create a lead-free double metal perovskite of CsAgBiBr, coupling with mesoporous/microporous UiO-66-NH MOF to form type-II heterojunctions for efficient photocatalytic reduction of CO with a high CO selectivity of 95 % at an electron consumption rate of 33 μmol g h (13.4 μmol g h for CO and 0.72 μmol g h for CH). Multilayered mesoporous MOF particles manifest higher catalytic activity than their microporous counterparts due to the highly open mesoporous channels and larger pore volume of the former. Femtosecond transient absorption in combination with in situ infrared spectroscopic measurements disentangle the underlying mechanism accounting for the high product selectivity: the ultrafast electron transfer of 12.3 ps from CsAgBiBr to UiO-66-NH-2 enables efficient charge separation; primary *COOH intermediates and rapid CO desorption from Bi-based photocatalyst lead to dominant CO product. Moreover, the MOF crystals maintain stability after γ-rays irradiation equivalent of over 45-year accumulation in a typical earth orbit, hinting their promising potential in extraterrestrial artificial light synthesis.
迫在眉睫的全球变暖危机和地外人工光合成需要光催化还原一氧化碳为燃料和高附加值化学品，而具有高选择性和高转化率的高效、坚固催化剂是前提条件，但迄今为止却非常罕见。在此，我们创造了一种无铅双金属包晶 CsAgBiBr，与介孔/微孔 UiO-66-NH MOF 相结合，形成 II 型异质结，用于高效光催化还原 CO，CO 选择性高达 95%，电子消耗率为 33 μmol g h（CO 为 13.4 μmol g h，CH 为 0.72 μmol g h）。多层介孔 MOF 颗粒的催化活性高于微孔颗粒，这是因为前者具有高度开放的介孔通道和较大的孔体积。飞秒瞬态吸收结合原位红外光谱测量揭示了高产物选择性的内在机理：CsAgBiBr 与 UiO-66-NH-2 之间 12.3 ps 的超快电子转移实现了高效的电荷分离；初级 *COOH 中间产物和 Bi 基光催化剂的快速 CO 解吸导致 CO 产物占主导地位。此外，MOF 晶体在γ 射线辐照后仍能保持稳定，相当于在典型地球轨道上积累了 45 年以上，这表明它们在地外人造光合成方面具有广阔的潜力。
{"title":"Disentangling the efficient photocatalytic reduction of CO2 by a stable UiO-66-NH2/Cs2AgBiBr6 catalyst","authors":"Na Li, Yan-Long Ma, Hui-Jie Zhang, Dan-Yang Zhou, Bei-Lin Yao, Jian-Feng Wu, Xin-Ping Zhai, Bo Ma, Ming-Jun Xiao, Qiang Wang, Hao-Li Zhang","doi":"10.1016/j.mtchem.2024.102306","DOIUrl":"https://doi.org/10.1016/j.mtchem.2024.102306","url":null,"abstract":"The compelling global warming crisis as well as extraterrestrial artificial light synthesis craves photocatalytic reduction of CO into fuels and value-added chemicals, for which efficient and robust catalysts with high selectivity and conversion rate is a prerequisite but hitherto a rarity. Herein we create a lead-free double metal perovskite of CsAgBiBr, coupling with mesoporous/microporous UiO-66-NH MOF to form type-II heterojunctions for efficient photocatalytic reduction of CO with a high CO selectivity of 95 % at an electron consumption rate of 33 μmol g h (13.4 μmol g h for CO and 0.72 μmol g h for CH). Multilayered mesoporous MOF particles manifest higher catalytic activity than their microporous counterparts due to the highly open mesoporous channels and larger pore volume of the former. Femtosecond transient absorption in combination with in situ infrared spectroscopic measurements disentangle the underlying mechanism accounting for the high product selectivity: the ultrafast electron transfer of 12.3 ps from CsAgBiBr to UiO-66-NH-2 enables efficient charge separation; primary *COOH intermediates and rapid CO desorption from Bi-based photocatalyst lead to dominant CO product. Moreover, the MOF crystals maintain stability after γ-rays irradiation equivalent of over 45-year accumulation in a typical earth orbit, hinting their promising potential in extraterrestrial artificial light synthesis.","PeriodicalId":18353,"journal":{"name":"Materials Today Chemistry","volume":"7 1","pages":""},"PeriodicalIF":7.3,"publicationDate":"2024-09-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142257734","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-09-12DOI: 10.1016/j.mtchem.2024.102308
Jin Young Park, Jae Yong Jung, Ganji Seeta RamaRaju, Hyun Kyoung Yang
The advancement in the development of inorganic phosphors marks a significant milestone in the fields of LED technology and forensic science. Herein, MgTiO:Mn (MTO:Mn) novel red-emitting phosphors are synthesized through a solvothermal method, which demonstrates a promising approach for enhancing latent fingerprint detection capabilities and improving the performance of red LEDs. The confirmation of the cubic structure post-annealing and the nano-nature as revealed by TEM analysis underpin the MTO:Mn phosphors suitability for these applications. The broad excitation spectra and the sharp red emission at 659 nm, coupled with the optimal doping concentration, showcase the MTO:Mn phosphor's efficient luminescence properties. Moreover, the calculated critical distance between Mn ions (32.906 Å) elucidates the concentration quenching mechanism, which is pivotal for optimizing the performance. The high purity of the emitted red light (97.2 %) and the precise CIE coordinates (0.5969, 0.2926) of the MTO:Mn phosphor suggest its potential for producing high-quality red LEDs. Additionally, the capability of MTO:Mn phosphors to reveal detailed and high-resolution latent fingerprints offers a more reliable and efficient method for processing and analyzing crucial evidence. These findings not only contribute to the scientific understanding of MTO:Mn phosphor materials but also pave the way for their practical application in cutting-edge technologies.
无机荧光粉的开发进展标志着 LED 技术和法医学领域的一个重要里程碑。本文通过溶热法合成了 MgTiO:Mn （MTO:Mn）新型红色发光荧光粉，为增强潜伏指纹检测能力和提高红色 LED 性能提供了一种可行的方法。退火后立方结构的确认以及 TEM 分析所揭示的纳米性质都证明了 MTO:Mn 荧光粉在这些应用中的适用性。宽广的激发光谱和 659 纳米波长处尖锐的红色发射，再加上最佳的掺杂浓度，展示了 MTO:Mn 荧光粉的高效发光特性。此外，计算得出的锰离子间临界距离（32.906 Å）阐明了浓度淬灭机制，这对优化性能至关重要。MTO:Mn 荧光粉发出的红光纯度高（97.2%），CIE 坐标精确（0.5969, 0.2926），这表明它具有生产高质量红色 LED 的潜力。此外，MTO:Mn 荧光粉能够显示详细和高分辨率的潜伏指纹，为处理和分析重要证据提供了更可靠、更高效的方法。这些发现不仅有助于科学界对 MTO:Mn 荧光粉材料的理解，还为其在尖端技术中的实际应用铺平了道路。
{"title":"Development of Mg2TiO4:Mn4+ phosphors for enhanced red LED emission and forensic fingerprint analysis","authors":"Jin Young Park, Jae Yong Jung, Ganji Seeta RamaRaju, Hyun Kyoung Yang","doi":"10.1016/j.mtchem.2024.102308","DOIUrl":"https://doi.org/10.1016/j.mtchem.2024.102308","url":null,"abstract":"The advancement in the development of inorganic phosphors marks a significant milestone in the fields of LED technology and forensic science. Herein, MgTiO:Mn (MTO:Mn) novel red-emitting phosphors are synthesized through a solvothermal method, which demonstrates a promising approach for enhancing latent fingerprint detection capabilities and improving the performance of red LEDs. The confirmation of the cubic structure post-annealing and the nano-nature as revealed by TEM analysis underpin the MTO:Mn phosphors suitability for these applications. The broad excitation spectra and the sharp red emission at 659 nm, coupled with the optimal doping concentration, showcase the MTO:Mn phosphor's efficient luminescence properties. Moreover, the calculated critical distance between Mn ions (32.906 Å) elucidates the concentration quenching mechanism, which is pivotal for optimizing the performance. The high purity of the emitted red light (97.2 %) and the precise CIE coordinates (0.5969, 0.2926) of the MTO:Mn phosphor suggest its potential for producing high-quality red LEDs. Additionally, the capability of MTO:Mn phosphors to reveal detailed and high-resolution latent fingerprints offers a more reliable and efficient method for processing and analyzing crucial evidence. These findings not only contribute to the scientific understanding of MTO:Mn phosphor materials but also pave the way for their practical application in cutting-edge technologies.","PeriodicalId":18353,"journal":{"name":"Materials Today Chemistry","volume":"30 1","pages":""},"PeriodicalIF":7.3,"publicationDate":"2024-09-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142257733","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-09-11DOI: 10.1016/j.mtchem.2024.102255
Thomas F. Winterstein, Christoph Malleier, Bernhard Klötzer, Volker Kahlenberg, Clivia Hejny, Maged F. Bekheet, Julian T. Müller, Aleksander Gurlo, Marc Heggen, Simon Penner
A series of SrMMoO (M = Ni, Co and (Ni,Co)) compounds was tested as representative model systems to highlight the capabilities of double perovskite structures as precursor materials for methane dry reforming (DRM) applications. Pretreatments in either pure hydrogen or dry reforming CO/CH mixtures exclusively yield partial decomposition of the initial double perovskite structures through exsolution of small Ni or CoO particles and the associated formation of additional crystalline compounds, such as SrMoO or SrCO (in DRM mixtures). The formation of a defective SrMoO transient phase has been revealed by in situ X-ray diffraction measurements in a pure hydrogen atmosphere. The main difference between the Ni- and Co-containing Sr molybdate perovskite structures is the much stronger oxidation propensity of exsolved Co, most likely by oxygen supply from the partially intact double perovskite structure. For SrNiMoO, the resulting metallic Ni-double perovskite interface is highly DRM active without strong coking, both if a pre-reduction step in hydrogen is carried out before the DRM experiment or if SrNiMoO is directly decomposed in the DRM mixture. Despite partial decomposition, the corresponding SrCoMoO structure is not active under DRM operation, most likely due to the in situ formation of small exsolved CoO particles, while Ni is exsolved in its metallic state. Different strategies to improve the catalytic activity, including hydrogen by-mixing, enhanced A-site deficiency or co-alloying with Ni have been followed, but only the latter has a beneficial effect on improving the DRM activity at compositions of SrNiCoMoO. In SrNiCoMoO, the substitution of Co by Ni suppresses the oxidation propensity of Co and during DRM yields the exsolution of Co-rich Ni–Co alloy nanoparticles. We also reveal a strong response of molybdenum as the B’ site cation to reduction and DRM treatment, causing the formation of reduced MoO phases accompanying the exsolution process.
{"title":"Molybdate-based double perovskite materials in methane dry reforming","authors":"Thomas F. Winterstein, Christoph Malleier, Bernhard Klötzer, Volker Kahlenberg, Clivia Hejny, Maged F. Bekheet, Julian T. Müller, Aleksander Gurlo, Marc Heggen, Simon Penner","doi":"10.1016/j.mtchem.2024.102255","DOIUrl":"https://doi.org/10.1016/j.mtchem.2024.102255","url":null,"abstract":"A series of SrMMoO (M = Ni, Co and (Ni,Co)) compounds was tested as representative model systems to highlight the capabilities of double perovskite structures as precursor materials for methane dry reforming (DRM) applications. Pretreatments in either pure hydrogen or dry reforming CO/CH mixtures exclusively yield partial decomposition of the initial double perovskite structures through exsolution of small Ni or CoO particles and the associated formation of additional crystalline compounds, such as SrMoO or SrCO (in DRM mixtures). The formation of a defective SrMoO transient phase has been revealed by in situ X-ray diffraction measurements in a pure hydrogen atmosphere. The main difference between the Ni- and Co-containing Sr molybdate perovskite structures is the much stronger oxidation propensity of exsolved Co, most likely by oxygen supply from the partially intact double perovskite structure. For SrNiMoO, the resulting metallic Ni-double perovskite interface is highly DRM active without strong coking, both if a pre-reduction step in hydrogen is carried out before the DRM experiment or if SrNiMoO is directly decomposed in the DRM mixture. Despite partial decomposition, the corresponding SrCoMoO structure is not active under DRM operation, most likely due to the in situ formation of small exsolved CoO particles, while Ni is exsolved in its metallic state. Different strategies to improve the catalytic activity, including hydrogen by-mixing, enhanced A-site deficiency or co-alloying with Ni have been followed, but only the latter has a beneficial effect on improving the DRM activity at compositions of SrNiCoMoO. In SrNiCoMoO, the substitution of Co by Ni suppresses the oxidation propensity of Co and during DRM yields the exsolution of Co-rich Ni–Co alloy nanoparticles. We also reveal a strong response of molybdenum as the B’ site cation to reduction and DRM treatment, causing the formation of reduced MoO phases accompanying the exsolution process.","PeriodicalId":18353,"journal":{"name":"Materials Today Chemistry","volume":"37 1","pages":""},"PeriodicalIF":7.3,"publicationDate":"2024-09-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142257749","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-09-11DOI: 10.1016/j.mtchem.2024.102304
Wenhui Bao, Xiangru Hou, Lu Ga, Gerile Aodeng, Jun Ai, Ailing Su
In this work, copper silver bimetallic nanoparticles (Cu/Ag BNPs) with strong fluorescence were prepared using glutathione (GSH) as a reductant and protectant. The range of fluorescence signal of GSH-Cu/Ag BNPs to ambient temperature is 30∼90 °C has a sensitive response and can be used as a temperature sensor. The high fluorescence intensity of GSH-Cu/Ag BNPs at around 30 °C indicates that the detection of Co does not require harsh temperature conditions, which could be very convenient for future practical detection work. In addition, glutathione in Cu/Ag BNPs and the synergistic effect of Cu and Ag nanoparticles in Cu/Ag BNPs can be used as a metal ion sensor for Co fluorescence detection.
本研究以谷胱甘肽（GSH）为还原剂和保护剂，制备了具有强荧光的铜银双金属纳米粒子（Cu/Ag BNPs）。GSH-Cu/Ag BNPs 对环境温度的荧光信号范围为 30 ∼ 90 °C，反应灵敏，可用作温度传感器。GSH-Cu/Ag BNPs 在 30 ℃ 左右的高荧光强度表明，Co 的检测不需要苛刻的温度条件，这为今后的实际检测工作提供了极大的便利。此外，Cu/Ag BNPs 中的谷胱甘肽以及 Cu/Ag BNPs 中 Cu 和 Ag 纳米粒子的协同效应可用作 Co 荧光检测的金属离子传感器。
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Pub Date : 2024-09-11DOI: 10.1016/j.mtchem.2024.102305
Hong Yang, Yan Gao, Wei Lv, Yulan Guo, Ruijing Fu, Tao Hu
Polycrystalline ceramics are promising for a diverse range of applications in solid state laser, lighting, scintillator and optical storage. Unfortunately, current ceramic elaborations involves strict and complex synthetic procedures such as ultra-high pressure and vacuum processing. Here, we realize the tune of MgAlSiO and MgAlSiO phase formation in a glass by controlling the two crystal nucleation and growth individually, and obtain a polycrystalline non-stoichiometric MgAlSiO:Eu translucent ceramic by virtue of complete and congruent crystallization of the glass. Microstructural characterizations verify that the resulting ceramic exhibits dense and closely stacked micrometer-scale crystallites with very thin grain boundary structure. Chemical composition analysis by energy dispersive X-ray spectrometry revels the grain's composition is highly deviated from the stoichiometric MgAlSiO, with atomic ratio Mg/Al/Si of 1.00: 1.46: 2.70. The precipitated non-stoichiometric MgAlSiO, structurally having infinite channels z = 0.25 or 0.75 sites that run parallel to the -aix, provides an robust crystal-field environment for Eu 5d-4f transition. As a consequence, the ceramic produces intense emission with photoluminescence quantum yield (PLQY) up to 90 %, and excellent thermal stability emission with 70.1 % emission intensity at 420 K relative to that at room temperature, demonstrating it can be applied in high power lighting application with improved light quality by employing the ceramic as a color converter. Moreover, the ceramic also exhibits thermally stimulated luminescence at temperature reaching up to 700 K, originating from the deep electronic traps in MgAlSiO lattice with estimated trap depth of 0.73eV and 0.97eV. We also demonstrate the ceramic is hopeful for optical information storage application as the storage information can be retain well without vulnerable by the fluctuations of external environments due to the deep traps.
多晶陶瓷在固态激光、照明、闪烁体和光存储等领域有着广泛的应用前景。遗憾的是，目前的陶瓷制备涉及严格而复杂的合成程序，如超高压和真空处理。在这里，我们通过单独控制两种晶体的成核和生长，实现了玻璃中 MgAlSiO 和 MgAlSiO 相形成的调控，并凭借玻璃的完全一致结晶，获得了多晶非配位 MgAlSiO:Eu 半透明陶瓷。微观结构特征验证了所得到的陶瓷呈现出致密、紧密堆积的微米级结晶，晶界结构非常薄。利用能量色散 X 射线光谱法进行的化学成分分析表明，晶粒的成分与化学计量的 MgAlSiO 有很大偏差，原子比 Mg/Al/Si 为 1.00：1.46：2.70。析出的非化学计量 MgAlSiO 在结构上具有与 -aix 平行的无穷通道 z = 0.25 或 0.75 位点，为 Eu 5d-4f 转变提供了强大的晶体场环境。因此，这种陶瓷能产生高强度的发射，光致发光量子产率（PLQY）高达 90%，并且具有出色的热稳定性发射，在 420 K 时的发射强度比室温下的发射强度高 70.1%，这表明它可应用于高功率照明领域，通过将陶瓷用作色彩转换器来改善光质量。此外，这种陶瓷还能在高达 700 K 的温度下发出热刺激发光，这源于 MgAlSiO 晶格中的深电子陷阱，估计陷阱深度为 0.73eV 和 0.97eV。我们还证明了这种陶瓷在光信息存储方面的应用前景，因为深陷阱可以很好地保留存储信息，而不会受到外部环境波动的影响。
{"title":"Highly efficient and thermally stable photonic ceramic by controllable and full crystallization from glass","authors":"Hong Yang, Yan Gao, Wei Lv, Yulan Guo, Ruijing Fu, Tao Hu","doi":"10.1016/j.mtchem.2024.102305","DOIUrl":"https://doi.org/10.1016/j.mtchem.2024.102305","url":null,"abstract":"Polycrystalline ceramics are promising for a diverse range of applications in solid state laser, lighting, scintillator and optical storage. Unfortunately, current ceramic elaborations involves strict and complex synthetic procedures such as ultra-high pressure and vacuum processing. Here, we realize the tune of MgAlSiO and MgAlSiO phase formation in a glass by controlling the two crystal nucleation and growth individually, and obtain a polycrystalline non-stoichiometric MgAlSiO:Eu translucent ceramic by virtue of complete and congruent crystallization of the glass. Microstructural characterizations verify that the resulting ceramic exhibits dense and closely stacked micrometer-scale crystallites with very thin grain boundary structure. Chemical composition analysis by energy dispersive X-ray spectrometry revels the grain's composition is highly deviated from the stoichiometric MgAlSiO, with atomic ratio Mg/Al/Si of 1.00: 1.46: 2.70. The precipitated non-stoichiometric MgAlSiO, structurally having infinite channels z = 0.25 or 0.75 sites that run parallel to the -aix, provides an robust crystal-field environment for Eu 5d-4f transition. As a consequence, the ceramic produces intense emission with photoluminescence quantum yield (PLQY) up to 90 %, and excellent thermal stability emission with 70.1 % emission intensity at 420 K relative to that at room temperature, demonstrating it can be applied in high power lighting application with improved light quality by employing the ceramic as a color converter. Moreover, the ceramic also exhibits thermally stimulated luminescence at temperature reaching up to 700 K, originating from the deep electronic traps in MgAlSiO lattice with estimated trap depth of 0.73eV and 0.97eV. We also demonstrate the ceramic is hopeful for optical information storage application as the storage information can be retain well without vulnerable by the fluctuations of external environments due to the deep traps.","PeriodicalId":18353,"journal":{"name":"Materials Today Chemistry","volume":"18 1","pages":""},"PeriodicalIF":7.3,"publicationDate":"2024-09-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142257735","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Microrobots are poised to revolutionize mass transport systems in emerging biomedical applications, yet their erratic motion poses a significant challenge in controlling their movements, particularly in-vivo. In this study, we introduce highly flexible, self-rotating nanorobots based on MoS Nanoflowers (NFs), offering superior control over their movement under magnetic field for cancer cell imaging and therapy. These nanorobots, termed MNBOTs, are constructed by embellishing pre-formed MoS NFs with NiFeO nanoparticles (NPs) using polymeric linkers, capitalizing on the abundance of disulfide bonds on the MoS surface. In-vitro experiments showcased MNBOT's precise control over velocity, trajectory, and curvature, adapting seamlessly to changes in magnetic flux density under electromagnetic navigation. Moreover, MNBOTs were able to release NiFeO NPs successfully in the tumor environment, facilitated by the collapse of disulfide bonds in the presence of glutathione/dithiothreitol, thus ensuring MNBOT's retrieval post-cancer therapy. Furthermore, we leveraged the photo-heat generation and paramagnetic features of MNBOTs for chemo-photothermal therapy (PTT) and magnetic resonance imaging (MRI) in ex vivo clinical settings. The combined effect of chemotherapy-PTT demonstrated remarkable cytotoxicity against MDA-MB-231 cancer cells, highlighting the synergistic potential of MNBOTs. The integration of diverse functionalities within MNBOTs, including remote magnetic navigation, photothermal therapy, and MRI, presents a versatile platform for addressing pressing healthcare needs, thus holding immense potential for future therapeutic and diagnostic applications.
微型机器人有望彻底改变新兴生物医学应用中的大规模运输系统，然而它们不稳定的运动给控制其运动（尤其是体内运动）带来了巨大挑战。在这项研究中，我们推出了基于 MoS 纳米流（NFs）的高柔性自旋转纳米机器人，可在磁场下出色地控制其运动，用于癌细胞成像和治疗。这些被称为 MNBOTs 的纳米机器人是利用 MoS 表面丰富的二硫键，通过聚合物连接剂将 NiFeO 纳米颗粒（NPs）与预成型的 MoS NFs 共同缀合而成。体外实验展示了 MNBOT 对速度、轨迹和曲率的精确控制，并能在电磁导航下无缝适应磁通密度的变化。此外，在谷胱甘肽/二硫苏糖醇的作用下，二硫键崩解，MNBOT 能够在肿瘤环境中成功释放 NiFeO NPs，从而确保 MNBOT 在癌症治疗后的回收。此外，我们还利用 MNBOT 的光热生成和顺磁特性，将其用于体内外临床化疗-光热疗法（PTT）和磁共振成像（MRI）。化疗-光热疗法的联合效应对 MDA-MB-231 癌细胞具有显著的细胞毒性，凸显了 MNBOTs 的协同潜力。MNBOTs 集成了多种功能，包括远程磁导航、光热疗法和核磁共振成像，为满足迫切的医疗保健需求提供了一个多功能平台，因此在未来的治疗和诊断应用中具有巨大的潜力。
{"title":"MoS2-based earth-like self-rotating and magnetically navigated nanorobots for magnetic resonance imaging, cancer cell imaging, and therapy","authors":"Anandhakumar Sundaramurthy, Nishakavya Saravanan, Hyoryong Lee, Chandran Murugan, Seungun Yang, Sukho Park","doi":"10.1016/j.mtchem.2024.102297","DOIUrl":"https://doi.org/10.1016/j.mtchem.2024.102297","url":null,"abstract":"Microrobots are poised to revolutionize mass transport systems in emerging biomedical applications, yet their erratic motion poses a significant challenge in controlling their movements, particularly in-vivo. In this study, we introduce highly flexible, self-rotating nanorobots based on MoS Nanoflowers (NFs), offering superior control over their movement under magnetic field for cancer cell imaging and therapy. These nanorobots, termed MNBOTs, are constructed by embellishing pre-formed MoS NFs with NiFeO nanoparticles (NPs) using polymeric linkers, capitalizing on the abundance of disulfide bonds on the MoS surface. In-vitro experiments showcased MNBOT's precise control over velocity, trajectory, and curvature, adapting seamlessly to changes in magnetic flux density under electromagnetic navigation. Moreover, MNBOTs were able to release NiFeO NPs successfully in the tumor environment, facilitated by the collapse of disulfide bonds in the presence of glutathione/dithiothreitol, thus ensuring MNBOT's retrieval post-cancer therapy. Furthermore, we leveraged the photo-heat generation and paramagnetic features of MNBOTs for chemo-photothermal therapy (PTT) and magnetic resonance imaging (MRI) in ex vivo clinical settings. The combined effect of chemotherapy-PTT demonstrated remarkable cytotoxicity against MDA-MB-231 cancer cells, highlighting the synergistic potential of MNBOTs. The integration of diverse functionalities within MNBOTs, including remote magnetic navigation, photothermal therapy, and MRI, presents a versatile platform for addressing pressing healthcare needs, thus holding immense potential for future therapeutic and diagnostic applications.","PeriodicalId":18353,"journal":{"name":"Materials Today Chemistry","volume":"49 1","pages":""},"PeriodicalIF":7.3,"publicationDate":"2024-09-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142257751","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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