Three-dimensional TiO2@C nano-network with high porosity as a highly efficient Pt-based catalyst support for methanol electrooxidation

RSC Advances ◽  
2016 ◽  
Vol 6 (82) ◽  
pp. 79254-79262 ◽  
Author(s):  
Xu-Lei Sui ◽  
Da-Ming Gu ◽  
Zhen-Bo Wang ◽  
Jing Liu ◽  
Lei Zhao ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Catalyst Support ◽  
Three Dimensional ◽  
Methanol Electrooxidation ◽  
High Porosity ◽  
Combined Effects ◽  
Unique Structure ◽  
Highly Efficient ◽  
3D Network ◽  
Highly Porous

Pt-based catalyst supported on highly porous 3D-network structured TiO2@C nanowires is constructed and exhibits ultrahigh catalytic activity and durability, which can be attributed to the combined effects of its unique structure and composition.

scholarly journals Electrospun Nanomaterials for Energy Applications: Recent Advances

2019 ◽  
Vol 9 (6) ◽  
pp. 1049 ◽  
Author(s):  
Saveria Santangelo
Keyword(s):  
Large Scale ◽  
Three Dimensional ◽  
Cost Effective ◽  
Water Desalination ◽  
High Porosity ◽  
Capacitive Deionization ◽  
Fiber Networks ◽  
Energy Applications ◽  
Recent Advances ◽  
Highly Porous

Electrospinning is a simple, versatile, cost-effective, and scalable technique for the growth of highly porous nanofibers. These nanostructures, featured by high aspect ratio, may exhibit a large variety of different sizes, morphologies, composition, and physicochemical properties. By proper post-spinning heat treatment(s), self-standing fibrous mats can also be produced. Large surface area and high porosity make electrospun nanomaterials (both fibers and three-dimensional fiber networks) particularly suitable to numerous energy-related applications. Relevant results and recent advances achieved by their use in rechargeable lithium- and sodium-ion batteries, redox flow batteries, metal-air batteries, supercapacitors, reactors for water desalination via capacitive deionization and for hydrogen production by water splitting, as well as nanogenerators for energy harvesting, and textiles for energy saving will be presented and the future prospects for the large-scale application of electrospun nanomaterials will be discussed.

Confined synthesis of three-dimensionally ordered arrays of multilamellar silica nanoparticles as a gold catalyst support

RSC Advances ◽  
2016 ◽  
Vol 6 (104) ◽  
pp. 102258-102263 ◽  
Author(s):  
Shujun Zhou ◽  
Xinlei Yao ◽  
Tongxiang Fan
Keyword(s):  
Catalytic Activity ◽  
Silica Nanoparticles ◽  
Gold Catalyst ◽  
Catalyst Support ◽  
Three Dimensional ◽  
Ordered Arrays ◽  
Supported Gold

Three-dimensional arrays of multilamellar silica nanoparticles are prepared through confined synthesis and enhance the catalytic activity of supported gold.

scholarly journals Tuning the Thermogelation and Rheology of Poly(2-Oxazoline)/Poly(2-Oxazine)s Based Thermosensitive Hydrogels for 3D Bioprinting

Gels ◽  
2021 ◽  
Vol 7 (3) ◽  
pp. 78
Author(s):  
Malik Salman Haider ◽  
Taufiq Ahmad ◽  
Mengshi Yang ◽  
Chen Hu ◽  
Lukas Hahn ◽  
...  
Keyword(s):  
Sol Gel ◽  
Three Dimensional ◽  
Homogeneous Distribution ◽  
Repeat Units ◽  
3D Network ◽  
Hydrogel Matrix ◽  
Thermosensitive Hydrogels ◽  
Sol Gel Transition ◽  
Highly Porous ◽  
Gel Transition

As one kind of “smart” material, thermogelling polymers find applications in biofabrication, drug delivery and regenerative medicine. In this work, we report a thermosensitive poly(2-oxazoline)/poly(2-oxazine) based diblock copolymer comprising thermosensitive/moderately hydrophobic poly(2-N-propyl-2-oxazine) (pPrOzi) and thermosensitive/moderately hydrophilic poly(2-ethyl-2-oxazoline) (pEtOx). Hydrogels were only formed when block length exceeded certain length (≈100 repeat units). The tube inversion and rheological tests showed that the material has then a reversible sol-gel transition above 25 wt.% concentration. Rheological tests further revealed a gel strength around 3 kPa, high shear thinning property and rapid shear recovery after stress, which are highly desirable properties for extrusion based three-dimensional (3D) (bio) printing. Attributed to the rheology profile, well resolved printability and high stackability (with added laponite) was also possible. (Cryo) scanning electron microscopy exhibited a highly porous, interconnected, 3D network. The sol-state at lower temperatures (in ice bath) facilitated the homogeneous distribution of (fluorescently labelled) human adipose derived stem cells (hADSCs) in the hydrogel matrix. Post-printing live/dead assays revealed that the hADSCs encapsulated within the hydrogel remained viable (≈97%). This thermoreversible and (bio) printable hydrogel demonstrated promising properties for use in tissue engineering applications.

scholarly journals Highly porous Co-doped NiO nanorods: facile hydrothermal synthesis and electrocatalytic oxygen evolution properties

2021 ◽  
Vol 8 (9) ◽  
pp. 202352
Author(s):  
Nguyen Duc Cuong ◽  
Tien D. Tran ◽  
Quyen T. Nguyen ◽  
Ho Van Minh Hai ◽  
Tran Thai Hoa ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Surface Area ◽  
Oxygen Evolution ◽  
Alkaline Medium ◽  
Active Sites ◽  
High Specific Surface Area ◽  
High Porosity ◽  
Metal Oxide Nanostructures ◽  
Highly Porous ◽  
Co Doped

Highly porous 3d transition metal oxide nanostructures are opening up the exciting area of oxygen evolution reaction (OER) catalysts in alkaline medium thanks to their good thermal and chemical stability, excellent physiochemical properties, high specific surface area and abundant nanopores. In this paper, highly porous Co-doped NiO nanorods were successfully synthesized by a simple hydrothermal method. The porous rod-like nanostructures were preserved with the added cobalt dopant ranging from 1 to 5 at% but were broken into aggregated nanoparticles at higher concentrations of additional cobalt. The catalytic activity of Co-doped NiO nanostructures for OER in an alkaline medium was assayed. The 5%Co-NiO sample showed a drastically enhanced activity. This result could originate from the combination of advantageous characteristics of highly porous NiO nanorods such as large surface area and high porosity as well as the important role of Co dopant that could provide more catalytic active sites, leading to an enhanced catalytic activity of the nanocatalyst.

A three-dimensional porous CoSnS@CNT nanoarchitecture as a highly efficient bifunctional catalyst for boosted OER performance and photocatalytic degradation

Nanoscale ◽  
2020 ◽  
Vol 12 (6) ◽  
pp. 3879-3887 ◽  
Author(s):  
Ramkumar Jeyagopal ◽  
Yuanfu Chen ◽  
Manigandan Ramadoss ◽  
Karpuraranjith Marimuthu ◽  
Bin Wang ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Photocatalytic Degradation ◽  
Alkaline Medium ◽  
High Stability ◽  
Three Dimensional ◽  
Bifunctional Catalyst ◽  
Hydrothermal Route ◽  
One Pot ◽  
Highly Efficient

CoSnS anchored CNT was synthesized by a one-pot surfactant-free hydrothermal route and shows high OER catalytic activity, high stability in alkaline medium and exhibits 2 times higher photocatalytic degradation for RhB than CoSnS.

Pd nanoparticles supported on three-dimensional graphene aerogels as highly efficient catalysts for methanol electrooxidation

2015 ◽  
Vol 178 ◽  
pp. 838-846 ◽  
Author(s):  
Mingrui Liu ◽  
Cheng Peng ◽  
Wenke Yang ◽  
Jiaojiao Guo ◽  
Yixiong Zheng ◽  
...  
Keyword(s):  
Three Dimensional ◽  
Pd Nanoparticles ◽  
Methanol Electrooxidation ◽  
Graphene Aerogels ◽  
Highly Efficient

scholarly journals Electrospun Fibrous Sponge via Short Fiber for Mimicking 3D ECM

2021 ◽  
Author(s):  
Yan Li ◽  
Juan Wang ◽  
Dejian Qian ◽  
Liang Chen ◽  
Xiumei Mo ◽  
...  
Keyword(s):  
Three Dimensional ◽  
Short Fiber ◽  
High Porosity ◽  
Collagen Secretion ◽  
Thickness Skin ◽  
Thermal Crosslinking ◽  
3D Network ◽  
Better Than

Abstract BackgroundMost of the natural extracellular matrix (ECM) is a three-dimensional (3D) network structure of micro/nanofibers for cell adhesion and growth of 3D. Electrospun fibers distinctive mimicked 2D ECM, however, it is impossible to simulate 3D ECM because of longitudinal collapse of continuous micro/nanofibers. Herein, 3D electrospun micro/nanofibrous sponge was fabricated via electrospinning, homogenization, short fiber and thermal crosslinking for 3D tissue regeneration of cells and vascular. ResultsFibrous sponge exhibited high porosity, water absorption and compression resilience and no chemical crosslinked agent was used in preparation process. In vitro studies showed that the 3D short fiber sponge provided an oxygen-rich environment for cell growth, which was conducive to the 3D proliferation and growth of HUVECs, stimulated the expression of VEGF, and well promoted the vascularization of HUVECs. In vivo studies showed that the 3D short fiber sponges had a good 3D adhesion to the chronic wound of diabetes in rats. Furthermore, 3D short fibrous sponges were better than 2D micro/nanofiber membranes in promoting the repair of diabetic full-thickness skin defects including wound healing, hair follicle regeneration, angiogenesis, collagen secretion. ConclusionTherefore, electrospun short fibrous sponges are special candidates for mimicking the 3D ECM and promoting 3D regeneration of tissue.

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