Results 111 to 120 of about 36,793 (298)

Uso de métodos químicos para sintetizar nanopartículas de SnO2-TiO2

open access: yesRevista Facultad de Ingeniería Universidad de Antioquia, 2008
En este trabajo se utilizaron dos rutas químicas para sintetizar polvos cerámicos del sistema SnO2-TiO2: los métodos de precipitación controlada y precursor polimérico (Pechini).
Alejandra Montenegro Hernández   +2 more
doaj  

Stannic Oxide-Titanium Dioxide Coupled Semiconductor Photocatalyst Loaded with Polyaniline for Enhanced Photocatalytic Oxidation of 1-Octene

open access: yesInternational Journal of Photoenergy, 2007
Stannic oxide-titanium dioxide (SnO2–TiO2) coupled semiconductor photocatalyst loaded with polyaniline (PANI), a conducting polymer, possesses a high photocatalytic activity in oxidation of 1-octene to 1,2-epoxyoctane with aqueous hydrogen peroxide.
Hadi Nur   +2 more
doaj   +1 more source

Incorporation of Extrinsic Alkali Cations Modulates Ion Migration and Hysteresis in Lateral MAPbBr3 Devices

open access: yesAdvanced Electronic Materials, EarlyView.
Extrinsic alkali cations regulate field‐driven ion migration and hysteresis in lateral MAPbBr3 devices. Combined electrical measurements and DFT calculations reveal distinct ion‐dependent transport behaviors, with Li+ producing the strongest modulation due to its lower migration barrier.
Hongxin Yuan   +10 more
wiley   +1 more source

Metal Cation Chemistry and Amorphous Structure Governing Hydrogen Tolerance in Oxide Semiconductor Channels for 3D DRAM

open access: yesAdvanced Electronic Materials, EarlyView.
Amorphous In–Sn–Ga–O channels are presented as hydrogen‐tolerant oxide semiconductors for DRAM‐relevant thermal processes. Systematic comparisons of ternary oxides separate elemental and crystallinity effects under 400–600°C H2 annealing. Sn incorporation and amorphous structure suppress thickness loss and enable field‐effect transistors to retain ...
Seong‐Hwan Ryu   +5 more
wiley   +1 more source

At room temperature graphene/SnO2 is better than MWCNT/SnO2 as NO2 gas sensor

open access: yes, 2016
Graphene/SnO2 and multi-walled carbon nanotubes (MWCNT)/SnO2 composites are synthesized by sol–gel process on adding 0.2 weight% of graphene and MWCNT into the precursor sol. The gas response of these composite was measured at room temperature.
Jain, Kiran, Srivastava, Vibha
core   +4 more sources

From Materials to Systems: Challenges and Solutions for Fast‐Charge/Discharge Na‐Ion Batteries

open access: yesAdvanced Energy Materials, EarlyView.
This review systematically analyzes the key characteristics limiting the fast‐charge/discharge capability of Na‐ion batteries (SIBs) from a multi‐scale perspective encompassing electrode materials, the electrode‐electrolyte interface, and the system. Furthermore, it presents practical solution strategies for the fundamental issues arising at each scale,
Bonyoung Ku   +5 more
wiley   +1 more source

Desenvolvimento de materiais com propriedades catalíticas para geração de hidrogênio a partir do processo de reforma a vapor do etanol [PDF]

open access: yes, 2008
Tese (doutorado) - Universidade Federal de Santa Catarina, Centro de Ciências Físicas e Matemáticas. Programa de Pós-Graduação em Química.Neste trabalho foi apresentado o desenvolvimento de novos materiais com potenciais propriedades catalíticas para ...
Fajardo, Humberto Vieira
core  

Sulfide‐Based Electrolytes for All‐Solid‐State Sodium Batteries

open access: yesAdvanced Energy Materials, EarlyView.
This review covers the structural features and synthesis strategies of sulfide‐based solid electrolytes, as well as critical challenges related to conductivity, interfacial and moisture stability, and scaling‐up for practical application in Sodium‐based All Solid‐State Batteries.
Han Yang   +6 more
wiley   +1 more source

Breaking the Durability–Power Trade‐Off: Boron‐Directed Faceted O3 Cathodes for High‐Rate Sodium‐Ion Batteries

open access: yesAdvanced Energy Materials, EarlyView.
Boron‐oxide‐assisted particle engineering stabilizes O3‐type layered cathodes for sodium‐ion batteries by mitigating phase transitions and lattice strain. Acting as flux and structural modifier, boron forms submicron hexagonal platelets with (003) facets and expanded Na‐layer spacing, enabling rapid Na⁺ diffusion and mechanical resilience.
Tengfei Song   +9 more
wiley   +1 more source

Pd-SnO2/Al2O3 heteroaggregate nanocatalysts for selective hydrogenations of p-nitroacetophenone and p-nitrobenzaldehyde

open access: yes, 2018
Pd-SnO2 heteroaggregate nanocatalysts were synthesized by in-situ transformation of PdSn bimetallic nano particles on alumina. The PdSn bimetallic nanoparticles were prepared by co-reduction of Pd and Sn precursors.
Zhou, Shenghu   +6 more
core  

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