F127-assisted hydrothermal preparation of BiOI with enhanced sunlight-driven photocatalytic activity originated from the effective separation of photo-induced carriers

Dou, Lin; Ma, Ding; Chen, Jiufu; Li, Jianzhang; Zhong, Jianxin

doi:10.1016/j.solidstatesciences.2019.01.010

Cited by 26 publications

(8 citation statements)

References 64 publications

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“…The XRD patterns confirm the achievement of the desired BiOI stoichiometry, with tetragonal phase (PDF# 10-0445). This phase has been already reported by several groups but using mainly Bi(NO 3 ) 3 as bismuth source [5,[14][15][16][17], [25][26][27][28][29][30][31][32], most of them by hydrothermal methods. Therefore, the same crystalline phase can be obtained regardless of the used precursor; in our case, bismuth acetate (BiAc) and subsalicylate (BiSs) by a simpler hydrothermal route.…”

Section: Resultssupporting

confidence: 56%

“…Although, in general, only the mode E g , corresponding to an internal Bi-I streching mode, is observed and it is used to confirm the presence of BiOI [35]. This mode has been reported from 148 [36] up to 159 cm −1 [32]; in our spectra, it is associated with a peak observed around 155 cm −1 . Regarding the peaks obtained around 130 and 310 cm −1 , they could be related with peaks reported around 118 and 310 cm −1 for samples of BiOI [27,37].…”

Section: Resultsmentioning

confidence: 58%

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Alternative Bi precursor effects on the structural, optical, morphological and photocatalytic properties of BiOI nanostructures

Florez-Rios

Santana-Aranda

Quiñones-Galván

et al. 2020

Mater. Res. Express

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BiOI nanostructures were synthetized through a hydrothermal process using either bismuth acetate or subsalicylate as Bi precursor. Regardless of the used Bi source, the same crystalline structure of BiOI was obtained; nevertheless, the nature of the Bi precursor had an evident impact in the color appearance of the obtained sample. Another notable difference was observed in the resulting morphology, where ∼1.6 μm flowerand dandelion-like shapes were obtained for acetate and subsalicylate, respectively; both structures assembled by around 30 nm thick nanoflakes with rounded and straight edge, respectively. UV-vis diffuse reflectance shows an energy gap around 1.8 eV. Raman spectroscopy confirms also the tetragonal phase of BiOI. The photocatalytic activity was evaluated through degradation of methyl orange dye using visible and UV light sources, comparing results with P25 TiO 2 . Both BiOI nanostructures presented an improvement of photocatalytic activity when irradiated with visible light, having the best photoactivity the sample synthetized with bismuth acetate.

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Section: Resultssupporting

confidence: 56%

Section: Resultsmentioning

confidence: 58%

Alternative Bi precursor effects on the structural, optical, morphological and photocatalytic properties of BiOI nanostructures

Florez-Rios

Santana-Aranda

Quiñones-Galván

et al. 2020

Mater. Res. Express

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“…During a hydrothermal process, various surfactants have been added to control the microstructure of BiOX. In this respect, Dou et al 17 synthesized BiOI photocatalysts in glacial acetic acid by using EO 106 PO 70 EO 106 (F127) as a surfactant. A large specific surface area and much more hydroxyls on F127-BiOI accelerated the rapid separation of photogenerated carriers and promoted the formation of O 2 − .…”

Section: Controllable Synthesis Of Bioxmentioning

confidence: 99%

Recent advances in bismuth oxyhalide photocatalysts for degradation of organic pollutants in wastewater

Jiang²,

Wang

et al. 2021

RSC Adv.

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“…The measured results are consistent with previously reported Raman data for BiOI crystals. [ 20 ] Figure 1d shows field emission SEM image (I) and energy‐dispersive X‐ray spectroscopy (EDS) elemental mapping of Bi (II) and I (III), suggesting the smooth morphology and uniform elemental distribution for the exfoliated BiOI nanosheet. Figure S2, Supporting Information, shows the BiOI nanosheet SEM image and the selected area for SEM‐EDS elemental analysis as well as element content, from which the atomic ratio can be calculated to be Bi:I:O = 1.09:1.07:1.0.…”

Section: Resultsmentioning

confidence: 99%

High‐Performance Memristor Based on 2D Layered BiOI Nanosheet for Low‐Power Artificial Optoelectronic Synapses

Lei

Duan

Qin

et al. 2022

Adv Funct Materials

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Artificial optoelectronic synapses with both electrical and light‐induced synaptic behaviors have recently been studied for applications in neuromorphic computing and artificial vision systems. However, the combination of visual perception and high‐performance information processing capabilities still faces challenges. In this work, the authors demonstrate a memristor based on 2D bismuth oxyiodide (BiOI) nanosheets that can exhibit bipolar resistive switching (RS) performance as well as electrical and light‐induced synaptic plasticity eminently suitable for low‐power optoelectronic synapses. The fabricated memristor exhibits high‐performance RS behaviors with a high ON/OFF ratio up to 105, an ultralow SET voltage of ≈0.05 V which is one order of magnitude lower than that of most reported memristors based on 2D materials, and low power consumption. Furthermore, the memristor demonstrates not only electrical voltage‐driven long‐term potentiation, depression plasticity, and paired‐pulse facilitation, but also light‐induced short‐ and long‐term plasticity. Moreover, the photonic synapse can be used to simulate the “learning experience” behaviors of human brain. Consequently, not only the memristor based on BiOI nanosheets shows ultra‐low SET voltage and low‐power consumption, but also the optoelectronic synapse provides new material and strategy to construct low‐power retina‐like vision sensors with functions of perceiving and processing information.

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F127-assisted hydrothermal preparation of BiOI with enhanced sunlight-driven photocatalytic activity originated from the effective separation of photo-induced carriers

Cited by 26 publications

References 64 publications

Alternative Bi precursor effects on the structural, optical, morphological and photocatalytic properties of BiOI nanostructures

Alternative Bi precursor effects on the structural, optical, morphological and photocatalytic properties of BiOI nanostructures

Recent advances in bismuth oxyhalide photocatalysts for degradation of organic pollutants in wastewater

High‐Performance Memristor Based on 2D Layered BiOI Nanosheet for Low‐Power Artificial Optoelectronic Synapses

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