High-quality double-shelled TiO hollow spheres (DHS-Ti) assembled with TiO nanosheets have been synthesized for the first time through a simple hydrothermal treatment of sSiO @TiO (TiO -coated solid SiO spheres). The double-shelled structure shows a high BET surface area up to 417.6 m g . Anatase DHS-Ti of high crystallinity can be obtained without structural collapse by calcination treatment. The effects of cetyl trimethylammonium bromide (CTAB) concentration, pH, and hydrothermal reaction temperature have also been investigated with a series of contrast experiments. A formation mechanism involving the in situ growth of amorphous TiO nanosheets followed by the redeposition of dissolved silica species is proposed. Lastly, the DHS-Ti forming strategy can be extended as a general strategy to fabricate various morphological hollow nanostructures and double-shelled Pt nanocatalysts by rationally selecting functional sSiO nanoparticles as core materials. This work could open up a new strategy for controllable synthesis of complex hollow structures and other functional materials.
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http://dx.doi.org/10.1002/chem.201602654 | DOI Listing |
J Am Chem Soc
January 2025
State Key Laboratory of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences; Research Unit of Nanocatalytic Medicine in Specific Therapy for Serious Disease, Chinese Academy of Medical Sciences (2021RU012), Shanghai 200050, P. R. China.
Diabetic cardiomyopathy (DCM) is one of the most lethal complications of diabetes and is induced by the overproduction of reactive oxygen species (ROS) in cardiomyocytes due to sustained high glucose levels, leading to cardiac oxidative damage and final sudden death. Drugs and antioxidants currently applied to the clinical therapy of DCM fail to scavenge ROS efficiently, resulting in compromised therapeutic efficacy. Herein, a nanocatalytic antioxidative therapeutic strategy is proposed for DCM treatment.
View Article and Find Full Text PDFNanomaterials (Basel)
December 2024
State Key Laboratory of Chemical Safety, College of Control Science and Engineering, China University of Petroleum (East China), Qingdao 266580, China.
With the growing severity of air pollution, monitoring harmful gases that pose risks to both human health and the ecological environment has become a focal point of research. Titanium dioxide (TiO) demonstrates significant potential for application in SO gas detection. However, the performance of pure TiO is limited.
View Article and Find Full Text PDFMolecules
December 2024
College of Engineering, South China Agricultural University, Guangzhou 510642, China.
TiO has broad prospects in reducing the safety risks posed by emerging pollutants in water environments. However, the high recombination rate of photogenerated carriers limits the activity and photon utilization efficiency of TiO. In this study, mesoporous TiO (m-TiO) and ultra-thin g-CN nanosheets were composited using a hydrothermal method, with the m-TiO tightly and uniformly wrapped by g-CN.
View Article and Find Full Text PDFAdv Mater
January 2025
Hefei National Laboratory for Physical Sciences at the Microscale, Department of Applied Chemistry, Department of Environmental Science and Engineering, Center of Advanced Nanocatalysis (CAN), University of Science & Technology of China, Hefei, Anhui, 230026, P. R. China.
Substitution metal doping strategies are crucial for developing catalysts capable of activating O, but the leaching of metal dopants has greatly hindered their potential for extensive oxidation reactions under mild conditions. Here, the study develops an entropy-increase strategy to synthesize high-entropy metal (Mg, Ca, Mn, Fe, and Co) interstitial functionalized anatase TiO (HE-TiO) nanosheets, demonstrating remarkable degradation efficiency across a wide pH range and exceptional stability in a flow-by electro-catalytic reactor. Relative to that of pristine TiO, the intense lattice distortion on the (001) plane, an average lattice expansion of 2% on the (100) plane, and decrease of second shell peak of X-ray absorption spectra serve as compelling evidence for the formation of metal interstitials in HE-TiO.
View Article and Find Full Text PDFAngew Chem Int Ed Engl
December 2024
Key Laboratory of Material Chemistry for Energy Conversion and Storage (Ministry of Education), Hubei Key Laboratory of Material Chemistry and Service Failure, School of Chemistry and Chemical Engineering, Huazhong University of Science and Technology, Wuhan, 430074, China.
Porous organic polymers have shown great potential in photocatalytic CO reduction due to their unique tunable structure favoring gas adsorption and metal sites integration. However, efficient photocatalysis in porous polymers is greatly limited by the low surface reactivity and electron mobility of bulk structure. Herein, we incorporate TiO nanoparticles and Ni(II) sites into a layered cationic imidazolium polymer (IP), in which the imidazolium moieties and free anions can stabilize the key intermediates and enhance the reaction kinetics of CO reduction.
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