Colossal permittivity with ultra-wide temperature stability in Bi + Ca co-doped BaTiO3 DOI Creative Commons
Tingting Fan, Qi Shi,

Wenrong Xiao

et al.

Journal of Materiomics, Journal Year: 2024, Volume and Issue: 11(2), P. 100877 - 100877

Published: May 16, 2024

The poor temperature stability of the BaTiO3 ceramic has always been main problem limiting their application. This situation improved but sacrifices intrinsic polarization, which significantly reduces dielectric constant. In this work, mechanism multiple polarization was creatively introduced, and properties BaTiO3-based ceramics are simultaneously enhanced. particular, Ba0.9925Bi0.005Ti0.995Ca0.005O2.995 (BBTC0.5) sample achieved excellent (−14.8%–8.85%) over an ultra-wide range (−47–400 oC) exhibited colossal permittivity (27,125, 25 oC, 1 kHz) low loss (0.07, kHz). properties, complex impedance spectra combined with XPS results indicate that defective dipole clusters (, ) along surface effects lead to effect. More importantly, SEM images show presence second phase at grain boundaries, prevent carriers within grains from accumulating boundaries. As a result, reduced further extended. strategy breaks traditional limitation single/noncomprehensive enhancement by single-polarization mechanism, is great theoretical practical significance promote research application high-performance materials.

Language: Английский

Construction of oxygen-deficient In2O3/ZnIn2S4 with hollow tubular heterostructure for photocatalytic CO2 reduction to syngas and benzyl alcohol oxidation DOI

Li Li,

Jiahui Wang,

Kaixuan Kuang

et al.

Separation and Purification Technology, Journal Year: 2023, Volume and Issue: 330, P. 125527 - 125527

Published: Oct. 29, 2023

Language: Английский

Citations

14
Nanostructurally Engineering Covalent Organic Frameworks for Boosting CO2 Photoreduction DOI
Tianyu Zheng,

Xu Ding,

Tingting Sun

et al.

Small, Journal Year: 2023, Volume and Issue: 20(15)

Published: Nov. 27, 2023

Abstract Herein, a series of imine‐linked covalent organic frameworks (COFs) are developed with advanced ordered mesoporous hollow spherical nanomorphology and ultra‐large mesopores (4.6 nm in size), named OMHS‐COF‐M (M = H, Co, Ni). The is revealed to be formed via an Ostwald ripening mechanism based on one‐step self‐templated strategy. Encouraged by its unique structural features outstanding photoelectrical property, the OMHS‐COF‐Co material applied as photocatalyst for CO 2 ‐to‐CO reduction. Remarkably, it delivers impressive production rate high 15 874 µmol g −1 h , large selectivity 92.4%, preeminent cycling stability. From in/ex situ experiments density functional theory (DFT) calculations, excellent photoreduction performance ascribed desirable cooperation host abundant isolated Co active sites, enhancing activation, improving electron transfer kinetics well reducing energy barriers intermediates *COOH generation desorption.

Language: Английский

Citations

14
Photothermal flows activated CsPbBr3 ⊆ Pb-TCPP S-scheme heterojunction: In-situ converted interface for robust CO2 reduction coupling with benzylamine oxidation DOI

You-Guo Luo,

Chenglong Peng,

Luo-Bing Tang

et al.

Chemical Engineering Journal, Journal Year: 2024, Volume and Issue: 495, P. 153307 - 153307

Published: June 18, 2024

Language: Английский

Citations

5
Stabilizing electron-rich Ni single-atoms on black phosphorus nanosheets boosts photocatalytic carbon dioxide reduction DOI
Ye Wang,

Yingkui Yan,

Huabin Zhang

et al.

Journal of Colloid and Interface Science, Journal Year: 2023, Volume and Issue: 658, P. 324 - 333

Published: Dec. 13, 2023

Language: Английский

Citations

12
Study on the performance of photothermal catalyzed carbon dioxide hydrogenation to CH4 over doped sodium tantalate-based perovskite catalysts DOI

Shuangjiao Li,

Jingzhou Lu,

Gang Wang

et al.

Journal of environmental chemical engineering, Journal Year: 2024, Volume and Issue: 12(3), P. 113108 - 113108

Published: May 18, 2024

Language: Английский

Citations

4
N Simultaneously Doped TiO2@Carbon Hollow Spheres with Enhanced Photocatalytic CO2 Reduction Activity DOI Open Access
Weiwei Fu, Ziyun Wang, Xinjie Liu

et al.

Catalysts, Journal Year: 2025, Volume and Issue: 15(1), P. 39 - 39

Published: Jan. 4, 2025

Converting carbon dioxide (CO2) into solar fuels through photocatalysis represents an appealing approach to tackling the escalating energy crisis and mitigating greenhouse effect. In this study, using melamine–formaldehyde (MF) nanospheres as a nitrogen source, N element was simultaneously doped TiO2 nanoparticle structure supported by hollow spheres one-step carbonization method form heterojunction N-CHS@N-TiO2 (marked (N-(CHS@TiO2)). The composite showed superior photocatalytic activity in reducing CO2 compared with N-CHS: after 6 h of visible light irradiation, CO yield 4.3 times that N-CHS TiO2; UV irradiation later, reached 2.6 7 N-CHS. substantial enhancement attributed TiO2, mesoporous structure, small average crystal size, large surface areas, heterostructure formed N-TiO2. UV-vis diffuse reflectance spectra (DRS) exhibit significant improvement absorption, visible-light-active sphere doping, thereby enhancing utilization.

Language: Английский

Citations

0
Recent Advances in Nanostructured Perovskite Oxide Synthesis and Application for Electrocatalysis DOI Creative Commons
Xiaofeng Xue, Bowen Li

Nanomaterials, Journal Year: 2025, Volume and Issue: 15(6), P. 472 - 472

Published: March 20, 2025

Nanostructured materials have garnered significant attention for their unique properties, such as the high surface area and enhanced reactivity, making them ideal electrocatalysis. Among these, perovskite oxides, with compositional structural flexibility, stand out remarkable catalytic performance in energy conversion storage technologies. Their diverse composition tunable electronic structures make promising candidates key electrochemical reactions, including oxygen evolution reaction (OER), hydrogen (HER), carbon dioxide reduction (CO2RR). perovskites offer advantages intrinsic activity mass/charge transport, which are crucial improving electrocatalytic performance. In view of rapid development nanostructured over past few decades, this review aims to provide a detailed evaluation synthesis methods, templating (soft, hard, colloidal), hydrothermal treatments, electrospinning, deposition approaches. addition, in-depth evaluations fundamentals, synthetic strategies, applications oxides OER, HER, CO2RR highlighted. While progress has been made, further research is needed expand methods create more complex improve mass-specific stability. This offers insights into potential electrocatalysis provides perspectives ongoing endeavor on nanostructural engineering perovskites.

Language: Английский

Citations

0
Xenes-based heterostructure for photocatalytic energy conversion and environmental remediation: A review DOI
Rong Hu,

Jingxia Lai,

Shabbir Muhammad

et al.

International Journal of Hydrogen Energy, Journal Year: 2025, Volume and Issue: 121, P. 283 - 303

Published: March 31, 2025

Language: Английский

Citations

0
Activating Lattice Oxygen in Perovskite Ferrite for Efficient and Stable Photothermal Dry Reforming of Methane DOI
Jilong Li, Jiwu Zhao,

Si-Bo Wang

et al.

Journal of the American Chemical Society, Journal Year: 2025, Volume and Issue: unknown

Published: April 16, 2025

Lattice oxygen (LO)-mediated photothermal dry reforming of methane (DRM) presents a promising approach to syngas production. However, realizing high DRM efficiency and durability remains challenging due the difficulty in activating LOs catalysts. Herein, we demonstrate that partially substituting Fe sites perovskite ferrite (LaFeO3) by Mn triggers LOs, bestowing catalyst with superior activity stability for after modification Ru. The exchange induces charge transfer from La Mn, which combined incoming photoexcited electrons reconstructs perovskite's electronic structure, weakening La-O-Mn bonds facilitating LO migration. Meanwhile, photogenerated holes migrate surface further enhancing their reactivity mediate DRM. Under light irradiation, exhibits an outstanding production rate (H2: 42.89 mol gRu-1 h-1, CO: 54.92 h-1) while stably operating over 150 h. It also achieves turnover frequency 0.9 s-1 light-to-chemical energy 15.3%, setting benchmark light-driven performance. This work underscores significance exact site doping metal oxides fine-tune activity, providing valuable guidance fabricating efficient catalysts solar-powered redox reactions proceeded via light-supported Mars-van Krevelen mechanism.

Language: Английский

Citations

0
The Perfect Imperfections of Perovskite Oxide Catalysts in the Aspect of Defect Equilibria DOI Creative Commons
Maria Christy, Seunggun Choi, Jiseok Kwon

et al.

Small Science, Journal Year: 2024, Volume and Issue: 5(1)

Published: Oct. 26, 2024

ABX 3 (X = O) perovskite oxides are an uprising class of alternative electrocatalysts in eminent technologies like electrocatalysis, photocatalysis, thermocatalysis, and energy storage. The perquisites oxide catalysts encompass ordered atomic structure, structural/compositional extensibility, flexible electronic lucrativeness, so on. ingenuity to precisely control tune the inherent properties by reconstructing their crystal structure is particularly advantageous electrocatalysis reactions oxygen reduction evolution (ORR OER). Incorporating multidimensional imperfections presumably perfect garnering booming attention among researchers. This concept can expertly influence boost reaction kinetics during electrocatalysis. Defects or achieved substituting A‐ and/or B‐sites with heteroatoms vacancies. Defect engineering points a promising new direction development catalysts. work surveys recent progress defect how it plays vital role design, application mainly ORR/OER. architecture, dimensionality, types based on cations, structures, stoichiometries surveyed for comprehensive understanding. review aims provide extensive outlook concerning structural defects.

Language: Английский

Citations

3