Journal ArticleDOI
Enhanced Electron Transport in Nb-Doped TiO2 Nanoparticles via Pressure-Induced Phase Transitions
Xujie Lü,Xujie Lü,Wenge Yang,Zewei Quan,Tianquan Lin,Ligang Bai,Lin Wang,Fuqiang Huang,Yusheng Zhao +8 more
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TLDR
Pressure-treated Nb-doped TiO2 with unique properties surpassing those in the anatase phase holds great promise for energy-related applications.Abstract:
Anatase TiO2 is one of the most important energy materials but suffers from poor electrical conductivity. Nb doping has been considered as an effective way to improve its performance in the applications of photocatalysis, solar cells, Li batteries, and transparent conducting oxide films. Here, we report the further enhancement of electron transport in Nb-doped TiO2 nanoparticles via pressure-induced phase transitions. The phase transition behavior and influence of Nb doping in anatase Nb-TiO2 have been systematically investigated by in situ synchrotron X-ray diffraction and Raman spectroscopy. The bulk moduli are determined to be 179.5, 163.3, 148.3, and 139.0 GPa for 0, 2.5, 5.0, and 10.0 mol % Nb-doped TiO2, respectively. The Nb-concentration-dependent stiffness variation has been demonstrated: samples with higher Nb concentrations have lower stiffness. In situ resistance measurements reveal an increase of 40% in conductivity of quenched Nb-TiO2 in comparison to the pristine anatase phase. The pressure-...read more
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Electrocatalytic Oxygen Evolution Reaction in Acidic Environments – Reaction Mechanisms and Catalysts
TL;DR: In this article, the current state of our understanding of the OER mechanism on PEM-compatible heterogeneous electrocatalysts, before comparing and contrast that to the OOR mechanism on homogenous catalysts.
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Fast Sodium Storage in TiO2@CNT@C Nanorods for High‐Performance Na‐Ion Capacitors
TL;DR: In this article, a novel Na-ion capacitor, utilizing TiO2@CNT@C nanorods as an intercalation-type anode and biomass-derived carbon with high surface area as an ion adsorption cathode in an organic electrolyte, is reported.
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Cellulose Nanomaterials—Binding Properties and Applications: A Review
TL;DR: Recent advances in CN utilization as an ecofriendly binder in several disparate areas are moved to, namely formaldehyde-free hybrid composites and wood-based panels, papermaking/coating processes, and energy storage devices, as well as their potential applications in biomedical fields as a cost-effective and tissue- friendly binder for cartilage regeneration, wound healing and dental repair.
Journal ArticleDOI
Surface and interface engineering of hierarchical photocatalysts
TL;DR: In this article, the fundamental and important interface engineering strategies of designing hierarchical photocatalysts, such as fabricating Z-Scheme heterojunctions, constructing Schottky-based heterjunctions, creating carbon-based and designing multicomponent heterjunction, are discussed.
Journal ArticleDOI
Enhanced Structural Stability and Photo Responsiveness of CH3NH3SnI3 Perovskite via Pressure-Induced Amorphization and Recrystallization
Xujie Lü,Yonggang Wang,Yonggang Wang,Constantinos C. Stoumpos,Qingyang Hu,Xiaofeng Guo,Haijie Chen,Liuxiang Yang,Jesse S. Smith,Wenge Yang,Yusheng Zhao,Yusheng Zhao,Hongwu Xu,Mercouri G. Kanatzidis,Quanxi Jia +14 more
TL;DR: An organic-inorganic halide CH3 NH3 SnI3 perovskite with significantly improved structural stability is obtained via pressure-induced amorphization and recrystallization and in situ high-pressure resistance measurements reveal an increased electrical conductivity by 300%.
References
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Journal ArticleDOI
A low-cost, high-efficiency solar cell based on dye-sensitized colloidal TiO2 films
TL;DR: In this article, the authors describe a photovoltaic cell, created from low-to medium-purity materials through low-cost processes, which exhibits a commercially realistic energy-conversion efficiency.
Journal ArticleDOI
Photocatalysis on TiO2 Surfaces - Principles, Mechanisms, and Selected Results
TL;DR: In this article, the authors focus on interfacial processes and summarize some of the operating principles of heterogeneous photocatalysis systems, including the electron transfer and energy transfer processes in photocatalytic reactions.
Journal ArticleDOI
Calibration of the ruby pressure gauge to 800 kbar under quasi-hydrostatic conditions
TL;DR: An improved calibration curve of the pressure shift of the ruby R1 emission line was obtained under quasi-hydrostatic conditions in the diamond-window, high-pressure cell to 800 kbar.
Journal ArticleDOI
Raman spectrum of anatase, TiO2
TL;DR: In this paper, the Raman spectra of anatase have been observed in both natural and synthetic crystals and the six Raman active fundamentals predicted by group theory are all observed and assigned.
Journal ArticleDOI
Mesoscopic CH3NH3PbI3/TiO2 heterojunction solar cells.
Lioz Etgar,Peng Gao,Zhaosheng Xue,Qin Peng,Aravind Kumar Chandiran,Bin Liu,Md. K. Nazeeruddin,Michael Grätzel +7 more
TL;DR: The simple mesoscopic CH(3)NH( 3)PbI(3)/TiO(2) heterojunction solar cell shows impressive photovoltaic performance, with short-circuit photocurrent J(sc)= 16.1 mA/cm(2), open-circuits photovvoltage V(oc) = 0.631 V, and a fill factor FF =0.57.
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