Hierarchical loading of CuO on SiO2 aerogel@high crystalline TiO2 nanofibers for efficiently photocatalytic reduction of CO2 without sacrificial agent

Wen, Man; Ren, Bin; Ye, Xiangzhi; He, Jianxiong; Jiang, Hong; Xiong, Chengdong

doi:10.1007/s12274-021-3994-7

Cited by 12 publications

(4 citation statements)

References 49 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…To determine the band gap, a combination of Mott–Schottky (M-S) and UV-excited photoelectron spectroscopy (UPS) curves was employed. The M-S curve was used to determine the conductive band, , while the UPS curve was used to determine the valence band. , Both curves are shown in the Supporting Information (Figures S6 and S7). Upon calculation using the reported methods, the band gap values were found to be 3.11, 3.08, and 3.01 eV for AC@TiO 2 , AC@Er 2 O 3 -Yb 2 O 3 /TiO 2 , and AC@Er 3+ -Yb 3+ -TiO 2 , respectively.…”

Section: Resultsmentioning

confidence: 99%

Fabrication of High-Performance TiO₂ Nanofibers on Coconut Shell Activated Carbon Particles for Photocatalytic Degradation of Organics in Marine Environment

Zhou,

Wang,

Shu

et al. 2024

ACS Sustainable Resour. Manage.

Self Cite

View full text Add to dashboard Cite

This study aims to overcome the limitations of powder catalysts in the photocatalytic degradation of organics in a marine environment. To achieve this, coconut shell activated carbon (AC) particles were utilized as a carrier to grow Ti(OH) 4 nanofibers. Er 3+ and Yb 3+ ions were introduced into the nanofibers through ion permeation, solving the problem of preparation caused by the mismatch of ionic radii and enhancing the utilization of infrared light in the solar spectrum. The results of photocatalytic degradation in seawater demonstrated that Er 3+ -Yb 3+ in the lattice enhanced the photocatalytic activity more effectively than supported Er 2 O 3 -Yb 2 O 3 . Additionally, during the calcination process, more oxygen vacancies (OVs) were conveniently introduced into TiO 2 through self-generated CO, further improving the separation of excited electron−hole pairs. The introduction of more OVs exhibited significantly higher generation rates and steady-state concentrations of 1 O 2 and • OH in seawater. Quenching experiments revealed that the presence of 1 O 2 , • OH, holes, and O 2•− all contributed to the degradation efficiency with their relative contributions depending on the specific compound. The AC-supported high-performance TiO 2 nanofibers display great potential for applications in the photocatalytic degradation of organics in a marine environment.

show abstract

Section: Resultsmentioning

confidence: 99%

Fabrication of High-Performance TiO₂ Nanofibers on Coconut Shell Activated Carbon Particles for Photocatalytic Degradation of Organics in Marine Environment

Zhou,

Wang,

Shu

et al. 2024

ACS Sustainable Resour. Manage.

Self Cite

View full text Add to dashboard Cite

show abstract

“…Wen et al. [ 116 ] reported that SiO 2 /CuO@TiO 2 /CuO exhibited stronger visible light adsorption than TiO 2 /CuO alone, displaying a more pronounced red‐shift of the adsorption edge. The unique core‐shell structure firmly bonded the two components together in the aerogel channel, leading to a significant increase in light adsorption.…”

Section: Core‐shell Catalysts For Photocatalytic Co2 Conversionmentioning

confidence: 99%

“…[115] CdS, CeO 2, and CdS@CeO 2 were used as photocatalysts (λ≥420 nm) for CO 2 reduction with water under visible light irradiation for 8 h. Guo and colleagues [98] measured PNS@ZnO of a strong light absorption below 400 nm under UV light. Wen et al [116] reported that SiO 2 /CuO@TiO 2 /CuO exhibited stronger visible light adsorption than TiO 2 /CuO alone, displaying a more pronounced red-shift of the adsorption edge. The unique core-shell structure firmly bonded the two components together in the aerogel channel, leading to a significant increase in light adsorption.…”

Section: Improvement Of Optical Propertiesmentioning

confidence: 99%

Recent Advances and Perspectives of Core‐Shell Nanostructured Materials for Photocatalytic CO₂ Reduction

Wang

Chen

et al. 2022

Small

View full text Add to dashboard Cite

recombination of photogenerated charges, as well as limited catalytic reactivity and stability. [9] As a result, various approaches including constructive bandgap engineering, [10] defect engineering, [11] junction engineering, [12] and morphology control, have been proposed to enhance the photocatalytic CO 2 reduction performance. Among them, morphology control strategy could obtain multi-dimensional structures such as 0D quantum dots, 1D nanorods/nanowires, 2D nanosheets, and 3D porous/hollow structures or core-shell structures. [13,14] A great deal of work confirmed that photocatalysts with different morphologies exhibited better photocatalytic activity than bulk nanomaterials. [15] These structurally modified materials have attracted considerable interest in the field of photocatalysis owing to their large specific surface area, improved light absorption, and shortened charge carrier transport pathways. [14,16] Notably, because of the low density, tunable capacity, and molecular loading of hollow shell structures, core/yolk-shell nanoparticles have been extensively developed. [17] This special morphology contains both inner and outer surfaces, which can provide a superior platform for the deposition of other components. The activity of nano-semiconductor photocatalytic reduction of CO 2 has been significantly promoted through the construction of the core-shell structure.Recently, many hierarchical systems of core-shell structures have been designed and fabricated. Due to the unique sizedependent electronic, optical, and adsorption properties, coreshell structured nanomaterials have broad applicability. [18] Nowadays, with the increasing interest in core-shell catalysts, their definition has been extended to include structures with distinct boundaries between the two or more constituent materials, whereby the inner materials are partially or completely encapsulated (even chemically bonded) by the outer materials. Semiconductor materials [19] have been characterized by good optical and chemical properties, making them ideal candidates for photocatalytic energy conversion applications. Core-shell semiconductor materials of single-layer or multi-layer shell structures could be synthesized using the template method, precipitation method, or hydrothermal method. Metals (such as Ag, Au, Cu, and Pt) or metal alloys could be used as cores to integrate with other catalytic materials to form single-core or multicore structures. [20,21] Materials such as layered double hydroxides (LDHs) [22] and MXenes [23] have been the most commonly Photocatalytic CO 2 conversion into solar fuels is a promising technology to alleviate CO 2 emissions and energy crises. The development of core-shell structured photocatalysts brings many benefits to the photocatalytic CO 2 reduction process, such as high conversion efficiency, sufficient product selectivity, and endurable catalyst stability. Core-shell nanostructured materials with excellent physicochemical features take an irreplaceable position in the field of photocatalytic CO 2 reduc...

show abstract

“…Aerogels are three-dimensional (3D) porous materials, which have attracted much attention due to features of low density, high porosity, large specific surface area, self-supportability, and excellent physicochemical properties. − Because of these unique advantages, aerogels already found applications in nearly all scientific areas as material rigidity enhancers or energy conversion electrocatalysts. − Thereinto, the catalytic behavior of electrocatalysts is mainly determined by the structure and morphology, and the near-surface atomic arrangement can be rationally regulated by optimizing the exposed face and the surface coordination environment. − The 3D sponge-like network structure of aerogels will facilitate mass and charge transfer, resulting in an outstanding catalytic property. − Up to now, great efforts have been made on metallic aerogel preparation by a wet-chemical reduction method, − and in the latest report, researchers have synthesized PdCuAuAgBiIn HEAAs using a freeze–thaw method and achieved good CO 2 RR performance . They have successfully achieved a transition from a monometallic aerogel to quaternary metal aerogel, but the preparation of the metallic aerogel with different alloying elements more than quaternary is still a considerable challenge due to the different reduction potentials and nucleation/growth kinetics of different constituent metals. − Moreover, facile and versatile strategies to construct composite single-phase solid solution materials at room temperature and in the water phase are still lacking. − …”

Section: Introductionmentioning

confidence: 99%

Chelating Co-reduction Strategy for the Synthesis of High-Entropy Alloy Aerogels

Nie

Zhang

et al. 2023

Inorg. Chem.

View full text Add to dashboard Cite

Aerogels, as three-dimensional porous materials, have attracted much attention in almost every field owing to their unique structural properties. Designing high-entropy alloy aerogels (HEAAs) to quinary and above remains an enormous challenge due to the different reduction potentials and nucleation/growth kinetics of different constituent metals. Herein, a novel and universal chelating co-reduction strategy to prepare HEAAs at room temperature in the water phase is proposed. The addition of chelators (ethylenediaminetetraacetic acid tetrasodium salt, sodium citrate, salicylic acid, and 4,4′-bipyridine) with a certain strong coordination capacity can adjust the reduction potential of different metal components, which is the key to synthesize single-phase solid solution alloys successfully. The optimized AgRuPdAuPt HEAA can be an excellent electrocatalyst for hydrogen evolution reaction (HER) with an ultrasmall overpotential of 22 mV at 10 mA cm −2 and excellent stability for 24 h in an alkaline solution. In situ Raman spectroscopy unveils the enhanced hydrogen evolution reaction mechanism of HEAAs. Overall, this work provides a novel chelating co-reduction strategy for the facile and versatile synthesis and design of advanced HEAAs and broadens the development and utilization of multi-elemental alloy electrocatalysts.

show abstract

Hierarchical loading of CuO on SiO2 aerogel@high crystalline TiO2 nanofibers for efficiently photocatalytic reduction of CO2 without sacrificial agent

Cited by 12 publications

References 49 publications

Fabrication of High-Performance TiO₂ Nanofibers on Coconut Shell Activated Carbon Particles for Photocatalytic Degradation of Organics in Marine Environment

Fabrication of High-Performance TiO₂ Nanofibers on Coconut Shell Activated Carbon Particles for Photocatalytic Degradation of Organics in Marine Environment

Recent Advances and Perspectives of Core‐Shell Nanostructured Materials for Photocatalytic CO₂ Reduction

Chelating Co-reduction Strategy for the Synthesis of High-Entropy Alloy Aerogels

Contact Info

Product

Resources

About

Hierarchical loading of CuO on SiO2 aerogel@high crystalline TiO2 nanofibers for efficiently photocatalytic reduction of CO2 without sacrificial agent

Cited by 12 publications

References 49 publications

Fabrication of High-Performance TiO2 Nanofibers on Coconut Shell Activated Carbon Particles for Photocatalytic Degradation of Organics in Marine Environment

Fabrication of High-Performance TiO2 Nanofibers on Coconut Shell Activated Carbon Particles for Photocatalytic Degradation of Organics in Marine Environment

Recent Advances and Perspectives of Core‐Shell Nanostructured Materials for Photocatalytic CO2 Reduction

Chelating Co-reduction Strategy for the Synthesis of High-Entropy Alloy Aerogels

Contact Info

Product

Resources

About

Fabrication of High-Performance TiO₂ Nanofibers on Coconut Shell Activated Carbon Particles for Photocatalytic Degradation of Organics in Marine Environment

Fabrication of High-Performance TiO₂ Nanofibers on Coconut Shell Activated Carbon Particles for Photocatalytic Degradation of Organics in Marine Environment

Recent Advances and Perspectives of Core‐Shell Nanostructured Materials for Photocatalytic CO₂ Reduction