ChemNanoMat最新文献_第9页

Fluorogenic Reaction Probes Defect Sites on Titanium Dioxide Nanoparticles 致氟反应探查二氧化钛纳米粒子上的缺陷位点

IF 2.6 4区材料科学

ChemNanoMat Pub Date : 2024-06-18 DOI: 10.1002/cnma.202400031

Dr. Li Zuo, Dr. Mohammad Akter Hossain, Dr. Rabindra Dubadi, Madelyn M. Kist, Fatiha Farhana, Dr. Jiao Chen, Prof. Mietek Jaroniec, Prof. Hao Shen

{"title":"Fluorogenic Reaction Probes Defect Sites on Titanium Dioxide Nanoparticles","authors":"Dr. Li Zuo, Dr. Mohammad Akter Hossain, Dr. Rabindra Dubadi, Madelyn M. Kist, Fatiha Farhana, Dr. Jiao Chen, Prof. Mietek Jaroniec, Prof. Hao Shen","doi":"10.1002/cnma.202400031","DOIUrl":"10.1002/cnma.202400031","url":null,"abstract":"Titanium dioxide nanoparticles (TiO2 NPs) have traditionally been utilized as industrial catalysts, finding widespread application in various chemical processes due to their exceptional stability and minimal toxicity. However, quantitatively assessing the reactive sites on TiO2 NPs remains a challenge. In this study, we employed a fluorogenic reaction to probe the apparent reactivity of TiO2 NPs. By manipulating the number of defect sites through control of hydrolysis speed and annealing temperature, we determined that the Ti(III) content is positively correlated with the reactivity of TiO2 NPs. Additionally, these Ti(III) sites could be introduced by reducing commercial TiO2 NPs using NaBH4. Our findings suggest that fluorogenic oxidation of Amplex Red is an effective method for probing defect site densities on TiO2 NPs. Utilizing single-molecule fluorescence imaging, we demonstrated the ability to map defect site density within TiO2 nanowires. Achieving sub-nanoparticle spatial resolution, we observed significant intraparticle and interparticle variations in the defect site distribution, leading to substantial reactivity heterogeneity.","PeriodicalId":54339,"journal":{"name":"ChemNanoMat","volume":"10 7","pages":""},"PeriodicalIF":2.6,"publicationDate":"2024-06-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/cnma.202400031","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141527506","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Bi2O2CO3/g-C3N4 Catalyst for Photocatalytic Coupling of Benzylamine under Mild Conditions 温和条件下光催化偶联苄胺的 Bi2O2CO3/g-C3N4 催化剂

IF 2.6 4区材料科学

ChemNanoMat Pub Date : 2024-06-16 DOI: 10.1002/cnma.202400182

Yunan Teng, Zhonghao Tan, Yingzhe Zhao, Zhuizhui Su, Meiling Li, Zixuan Zhang, Prof. Jianling Zhang

{"title":"Bi2O2CO3/g-C3N4 Catalyst for Photocatalytic Coupling of Benzylamine under Mild Conditions","authors":"Yunan Teng, Zhonghao Tan, Yingzhe Zhao, Zhuizhui Su, Meiling Li, Zixuan Zhang, Prof. Jianling Zhang","doi":"10.1002/cnma.202400182","DOIUrl":"10.1002/cnma.202400182","url":null,"abstract":"The photocatalytic conversion of benzylamine into imine is promising for industrial production and environmental protection. To develop photocatalysts with desirable compositions and microstructures is key to achieve high activity and selectivity. Here we propose the immobilization of Bi2O2CO3 on g-C3N4 for the photocatalytic conversion of benzylamine. The Bi2O2CO3/g-C3N4 catalyst possesses improved light absorption capacity, electron transmission rate and reduced electron-hole recombination than pure Bi2O2CO3. It can efficiently catalyze benzylamine coupling reaction under mild conditions, i. e., at room temperature, with air as oxidant and no additional oxidant involved. The maximum turnover frequency value of N-benzylbenzaldimine reaches 1555.3 μmol g−1 h−1 under this condition. The Bi2O2CO3/g-C3N4 catalyst has potential in other photocatalytic reactions.","PeriodicalId":54339,"journal":{"name":"ChemNanoMat","volume":"10 10","pages":""},"PeriodicalIF":2.6,"publicationDate":"2024-06-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141507031","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Lithium Fluoride Enhanced Platinum Catalytic Exchange of Hydrogen Isotopes by High Hydrogen Adsorption at Low Temperature 氟化锂通过低温高氢吸附增强铂催化的氢同位素交换

IF 2.6 4区材料科学

ChemNanoMat Pub Date : 2024-06-16 DOI: 10.1002/cnma.202400043

Chenxiao Liu, Yongsheng Xu, Jia Ren, Weiyi Liu, Prof. Feng Xin

引用次数: 0

Front Cover: Biodegradability of Carbon Nano-Onions by Human Myeloperoxidase and Photo-Fenton Process (ChemNanoMat 6/2024) 封面：人髓过氧化物酶和光-芬顿过程对碳纳米洋葱的生物降解性（ChemNanoMat 6/2024）

IF 3.8 4区材料科学

ChemNanoMat Pub Date : 2024-06-14 DOI: 10.1002/cnma.202480601

K. Swetha, Adalberto Camisasca, Michał Bartkowski, Akash Garhwal, Ananya Aravind, Prathiksha Ganesh, Prof. Silvia Giordani, Dr. Rajendra Kurapati

引用次数: 0

Direct Conjugation of TiO2 Nanoparticles with Phototherapeutic Prodrug 5-Aminolevulinic Acid 二氧化钛纳米颗粒与光疗原药 5-Aminolevulinic Acid 直接共轭

IF 2.6 4区材料科学

ChemNanoMat Pub Date : 2024-06-10 DOI: 10.1002/cnma.202400310

Dr. Farid Hajareh Haghighi, Dr. Martina Mercurio, Dr. Sara Cerra, Dr. Cleofe Palocci, Prof. Marco Rossi, Dr. Martina Marsotto, Prof. Chiara Battocchio, Prof. Ilaria Fratoddi

{"title":"Direct Conjugation of TiO2 Nanoparticles with Phototherapeutic Prodrug 5-Aminolevulinic Acid","authors":"Dr. Farid Hajareh Haghighi, Dr. Martina Mercurio, Dr. Sara Cerra, Dr. Cleofe Palocci, Prof. Marco Rossi, Dr. Martina Marsotto, Prof. Chiara Battocchio, Prof. Ilaria Fratoddi","doi":"10.1002/cnma.202400310","DOIUrl":"10.1002/cnma.202400310","url":null,"abstract":"TiO2 nanoparticles (TiO2NPs) were directly conjugated with the phototherapeutic prodrug, 5-aminolevulinic acid (ALA), using a mild and green approach. The resultant TiO2NPs-ALA nanoconjugates were characterized by different techniques, including HPLC, UV-Vis, FTIR-ATR, 1H-NMR, FESEM-EDS, TEM, DLS, and synchrotron radiation-induced XPS (SR-XPS) to assess the successful loading of 15 % and the chemical stability of ALA on the TiO2NPs. More importantly, the SR-XPS results showed the stabilizing effect of TiO2 nanosurface on the ALA molecules (against structural change) in neutral and alkaline pHs, which is of great significance in the potential therapeutic applications of ALA. The FESEM and TEM results exhibited the grain-like TiO2NPs-ALA particles with a 20–50 nm size distribution, indicating size-controlling effect of ALA on the TiO2NPs during the conjugation process and the presence of the organic molecule layer onto the surface. TiO2NPs-ALA represents a promising candidate for studies in photodynamic therapy considering the stabilization effect observed by spectroscopic characterizations.","PeriodicalId":54339,"journal":{"name":"ChemNanoMat","volume":"10 8","pages":""},"PeriodicalIF":2.6,"publicationDate":"2024-06-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141366032","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Structural Instability of NiFe-Layered Double Hydroxide Nanosheets during Water Oxidation Operation 镍铁层双氢氧化物纳米片在水氧化操作过程中的结构不稳定性

IF 2.6 4区材料科学

ChemNanoMat Pub Date : 2024-06-06 DOI: 10.1002/cnma.202400035

Dr. Xiaoyi Meng, Dr. Xiaohua Zhao

引用次数: 0

Highly Active and Selective Fe-MOF/2D-Montmorillonite Photocatalyst via in-situ Preparation for Hydroxylation of Benzene to Phenol 通过原位制备高活性和高选择性铁-MOF/二维蒙脱石光催化剂，用于苯羟化成苯酚

IF 2.6 4区材料科学

ChemNanoMat Pub Date : 2024-06-04 DOI: 10.1002/cnma.202400240

Xuetong Xu, Dr. Xu Jia, Cong Liu, Jiaolong Qiao, Fuying Wang, Prof. Dr. Liuxue Zhang, Dan Yang, Yuan Zhang, Xiulian Wang

{"title":"Highly Active and Selective Fe-MOF/2D-Montmorillonite Photocatalyst via in-situ Preparation for Hydroxylation of Benzene to Phenol","authors":"Xuetong Xu, Dr. Xu Jia, Cong Liu, Jiaolong Qiao, Fuying Wang, Prof. Dr. Liuxue Zhang, Dan Yang, Yuan Zhang, Xiulian Wang","doi":"10.1002/cnma.202400240","DOIUrl":"10.1002/cnma.202400240","url":null,"abstract":"The photocatalytic hydroxylation of benzene to phenol is an important reaction for the synthesis of fine chemicals and pharmaceuticals. However, the development of efficient and selective photocatalysts for this reaction remains a challenge. Here, a highly active and selective Fe-MOF/2D-montmorillonite (Fe-MOF/MMT) photocatalyst was prepared via an in-situ method for the hydroxylation of benzene to phenol under the visible light irradiation. The Fe-MOF/MMT composite exhibited excellent photocatalytic performance, with phenol yield of 30.3 % and benzene selectivity of 96.5 % within 4 hours. The high activity and selectivity of the Fe-MOF/MMT photocatalyst were attributed to the synergistic effect between the Fe-MOF and MMT, as well as the unique 2D structure of MMT, which facilitated charge separation and transfer. The Fe-MOF/MMT composite also showed good stability and re-used without significant decrease of activity. This study demonstrated that the potential of Fe-MOF/MMT as a highly efficient and selective photocatalyst for the hydroxylation of benzene to phenol and provided an insight into the design of advanced photocatalysts for sustainable chemical synthesis.","PeriodicalId":54339,"journal":{"name":"ChemNanoMat","volume":"10 8","pages":""},"PeriodicalIF":2.6,"publicationDate":"2024-06-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141265796","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Photopatterned Hybrid Supramolecular/Polymer Hydrogels for Controlled Heparin Release and Stem Cell Growth 用于控制肝素释放和干细胞生长的光图案混合超分子/聚合物水凝胶

IF 2.6 4区材料科学

ChemNanoMat Pub Date : 2024-06-01 DOI: 10.1002/cnma.202400183

Dr. Álvaro López-Acosta, Dr. Phillip R. A. Chivers, Dr. Carmen C. Piras, Dr. Alasdair G. Kay, Prof. Paul G. Genever, Prof. David K. Smith

{"title":"Photopatterned Hybrid Supramolecular/Polymer Hydrogels for Controlled Heparin Release and Stem Cell Growth","authors":"Dr. Álvaro López-Acosta, Dr. Phillip R. A. Chivers, Dr. Carmen C. Piras, Dr. Alasdair G. Kay, Prof. Paul G. Genever, Prof. David K. Smith","doi":"10.1002/cnma.202400183","DOIUrl":"10.1002/cnma.202400183","url":null,"abstract":"This paper reports hybrid gels combining a low-molecular-weight gelator (LMWG) and a photoinitiated crosslinked polymer gel (PG). The presence of the PG enhanced the stiffness and strength of the gel. The gels were loaded with heparin, and in the hybrid gel, the interpenetrated LMWG and PG networks somewhat restricted its release. In terms of stem cell growth, the hybrid gel significantly improved the performance of the PG because of the presence of the LMWG, which is an excellent substrate for stem cells in its own right. Furthermore, the presence of heparin in the hybrid gels also enhanced stem cell proliferation over longer timescales. Finally, these gels were photopatterned within the well-plates used for tissue culture, with patterning helping control stem cell proliferation. In summary, these hybrid gels combine the advantageous features of both LMWG and PG: rheological performance is endowed by the PG with stem cell compatibility provided by the LMWG. The hybrid gels also control the release of the bioactive agent heparin and have capacity to be shaped and patterned. Patterned gels such as these, capable of directing stem cell growth, have potential in regenerative medicine.","PeriodicalId":54339,"journal":{"name":"ChemNanoMat","volume":"10 8","pages":""},"PeriodicalIF":2.6,"publicationDate":"2024-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/cnma.202400183","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141193786","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Porous GaP/g-C3N4 Photoanode for Enhanced Hydrogen Production 用于增强氢气生产的多孔 GaP/g-C3N4 光阳极

IF 2.6 4区材料科学

ChemNanoMat Pub Date : 2024-05-31 DOI: 10.1002/cnma.202400024

Dr. Hao Yuan, Prof. Maojun Zheng, Dr. Ying Yang, Jiaheng Gao, Hao Chen, Yunlong Fan, Yinghong Li, Prof. Li Ma, Guohua Wang, Prof. Wenzhong Shen

{"title":"Porous GaP/g-C3N4 Photoanode for Enhanced Hydrogen Production","authors":"Dr. Hao Yuan, Prof. Maojun Zheng, Dr. Ying Yang, Jiaheng Gao, Hao Chen, Yunlong Fan, Yinghong Li, Prof. Li Ma, Guohua Wang, Prof. Wenzhong Shen","doi":"10.1002/cnma.202400024","DOIUrl":"10.1002/cnma.202400024","url":null,"abstract":"The g-C3N4 decorated porous gallium phosphide have been fabricated by a facile electrophoretic deposition (EPD) process. The morphology, element composition and light absorption of the GaP/g-C3N4 photoanode were observed using field-emission scanning electron microscopy, X-ray photoelectron spectroscopy, ultraviolet and visible spectrophotometer, respectively. When acting as photoanode, porous GaP/g-C3N4 serves as a direct Z-scheme system, where photogenerated holes in GaP are expended by electrons generated from the g-C3N4, inhibiting the corrosion of GaP. Therefore, the porous GaP/g-C3N4 showed a larger photocurrent density, which is 2.1 times as large as that of the porous GaP without g-C3N4, and a more stable photocurrent density for over 10000 s (at 0 V vs RHE). Thus, this work delivers a practical way to improve the photoelectrochemical stability and property of III–V semiconductor materials, which could be used in solar energy conversion fields.","PeriodicalId":54339,"journal":{"name":"ChemNanoMat","volume":"10 8","pages":""},"PeriodicalIF":2.6,"publicationDate":"2024-05-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141193407","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

One-Pot Synthesis of Gold Nanoparticles and Aluminum Hydroxide Hydrogels-Based Nanocomposites with Modulated Optical Properties 一锅合成具有可调光学特性的金纳米粒子和氢氧化铝氢凝胶基纳米复合材料

IF 2.6 4区材料科学

ChemNanoMat Pub Date : 2024-05-31 DOI: 10.1002/cnma.202400195

Dr. Gustavo M. Segovia, Dr. Cristián Huck-Iriart, Dr. Víctor Oestreicher, Dr. Paula C. Angelomé

{"title":"One-Pot Synthesis of Gold Nanoparticles and Aluminum Hydroxide Hydrogels-Based Nanocomposites with Modulated Optical Properties","authors":"Dr. Gustavo M. Segovia, Dr. Cristián Huck-Iriart, Dr. Víctor Oestreicher, Dr. Paula C. Angelomé","doi":"10.1002/cnma.202400195","DOIUrl":"10.1002/cnma.202400195","url":null,"abstract":"In this work, the one-pot synthesis of composites constituted by gold nanoparticles (AuNPs) and aluminum hydroxide hydrogels (AlHG) by employing the Epoxide Route is presented. To modulate the optical properties of the final composites, different anions (X=<math></math>\u0000, <math></math>\u0000, <math></math>\u0000 and <math></math>\u0000) were used as nucleophile, complexing and growth directing agents of the AuNPs. In addition, the concentration of the reactants, e. g., the X : Cl ratio, was set in such a way to preserve the alkalization rate, the transparency of the hydrogels supporting the AuNPs, and the stability of the final composites. Consequently, the composites exhibit different plasmonic properties, resulting from the AuNPs with different sizes and morphologies, as confirmed through transmission electron microscopy, depending on the nature of the employed anion, exclusively. Furthermore, this versatile one-pot synthesis strategy was employed to design new composites with different I : Cl ratio and synthesize stable colloidal AuNPs within an aluminum hydroxide sol (AuNP@Alsol) without adding any conventional capping agent. This AuNP@Alsol composite can be used as seed to accelerate the extremely slow AuNPs formation kinetics in AuNP@AlHG(SCN), demonstrating the potential of this synthesis method to create composites susceptible to be applied in the photonic and catalysis areas.","PeriodicalId":54339,"journal":{"name":"ChemNanoMat","volume":"10 9","pages":""},"PeriodicalIF":2.6,"publicationDate":"2024-05-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141193447","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0