One-Pot Hydrothermal Synthesis of La-Doped ZnIn2S4 Microspheres with Improved Visible-Light Photocatalytic Performance

Impurity element doping is extensively taken as one of the most efficient strategies to regulate the electronic structure as well as the rate of photogenerated charge separation of photocatalysts. Herein, a one-pot hydrothermal synthesis process was exploited to obtain La-doped ZnIn2S4 microspheres, aiming at gaining insight into the role that doping ions played in the improvement of pollutant photodegradation. Systematical characterization means, comprising of X–ray photoelectron spectroscopy (XPS), ultraviolet–visible (UV–vis) diffuse reflection spectroscopy and Raman spectra, combination with high-resolution transmission electron microscopy (HRTEM), were employed to in depth reveal the concomitancy of La ions and ZnIn2S4 crystal lattice. The results showed that the La-doped ZnIn2S4 samples exhibited a slightly wider and stronger spectral absorption than pristine ZnIn2S4; and the specific surface area of doped ZnIn2S4 samples was a bit larger. The La-doped ZnIn2S4 electrodes showed improved photocurrent response, and the photocurrent density reached a maximum value at La content of 1.5 wt%. As expected, La-doped ZnIn2S4 samples exhibited a remarkable enhancement of photocatalytic behaviour toward the photodegradation of tetracycline hydrochloride (TCH) and methyl orange (MO). The prominently enhanced photoactivity of doped ZnIn2S4 samples was due to the synergistic effect of the elevated visible-light absorption ability and effective photogenerated charge carriers’ separation.

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One-Pot Hydrothermal Synthesis of Sulfur-Doped SnO2 Nanoparticles and their Enhanced Photocatalytic Properties

NANO ◽

10.1142/s1793292016500351 ◽

2016 ◽

Vol 11 (03) ◽

pp. 1650035 ◽

Cited By ~ 6

Author(s):

Lin Ma ◽

Limei Xu ◽

Xuyao Xu ◽

Xiaoping Zhou ◽

Lingling Zhang

Keyword(s):

Visible Light ◽

Photoelectron Spectroscopy ◽

Electrochemical Impedance ◽

Sno2 Nanoparticles ◽

Light Response ◽

One Pot ◽

X Ray ◽

Transmission Electron ◽

Light Region ◽

Vis Spectroscopy

Sulfur-doped SnO2 nanoparticles with ultrafine sizes have been successfully prepared by a one-pot hydrothermal method. The obtained samples are characterized by X-ray diffraction (XRD), energy dispersive X-ray spectroscopy (EDX), X-ray photoelectron spectroscopy (XPS), high resolution transmission electron microscopy (HRTEM), thermogravimetric (TG), analyzer UV-Vis spectroscopy, photoluminescence (PL) and electrochemical impedance spectroscopy (EIS). The experimental results indicate that the doping level of sulfur element as well as the bandgaps of SnO2 can be controlled to a certain extent by varying the amount of L-cysteine (L-cys). When evaluated as photocatalysts in the degradation of rhodamine B (RhB) and reduction of Cr(VI) under visible light region, the resultant sulfur-doped SnO2 nanoparticles demonstrate obviously enhanced photocatalytic activities due to the markedly improved visible light response and effective separation of the photo-generated electron–hole pairs.

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A facile one-pot preparation of Bi2O2CO3/g-C3N4 composites with enhanced photocatalytic activity

Water Science & Technology ◽

10.2166/wst.2019.146 ◽

2019 ◽

Vol 79 (8) ◽

pp. 1494-1502 ◽

Cited By ~ 3

Author(s):

Yongzheng Duan ◽

Haibo Yao ◽

Jing Li ◽

Xili Shang ◽

Dongmei Jia ◽

...

Keyword(s):

Visible Light ◽

Photoelectron Spectroscopy ◽

One Pot ◽

X Ray ◽

Enhanced Absorption ◽

Synthetic Strategy ◽

Transmission Electron ◽

Potential Applications ◽

Ir Transmission ◽

Catalytic Stability

Abstract Bi2O2CO3 modified graphitic carbon nitride (g-C3N4) nanosheets were prepared by a simple one-pot synthetic strategy. In the presence of ammonium nitrate, different mass ratios of bismuth nitrate/melamine were used to fabricate these catalysts, which were characterized by X-ray diffraction (XRD), N2-physisorption, Fourier transform infrared spectroscopy (FT-IR), transmission electron microscopy (TEM), X-ray photoelectron spectroscopy (XPS), UV-vis analysis, and photoluminescence (PL). The catalytic properties of composites were evaluated by photodegrading tetracycline hydrochloride (TC) under visible light irradiation. Among these catalysts, Bi2O2CO3(1.5)/g-C3N4 showed the highest catalytic activity, which was more than 16 times greater than the pristine g-C3N4 material. The improved photocatalytic properties of Bi2O2CO3/g-C3N4 may be due to the formation of a heterojunction between Bi2O2CO3 and g-C3N4, leading to the effective separation of photo-induced carriers and the enhanced absorption of visible light. Furthermore, the Bi2O2CO3/g-C3N4 composites had considerable catalytic stability, which was a key element for their potential applications.

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Facile synthesis of Rh/Ti3+-TiO2 nanocomposites and its photodisinfection properties on Staphylococcus aureus under visible-NIR excitation

10.21203/rs.3.rs-25790/v1 ◽

2020 ◽

Author(s):

Jingtao Zhang ◽

Shurui Liu ◽

Qinwen Wang ◽

Jing Yao ◽

Yin Liu ◽

...

Keyword(s):

Staphylococcus Aureus ◽

Visible Light ◽

Photoelectron Spectroscopy ◽

Near Infrared ◽

One Pot ◽

X Ray ◽

Nir Light ◽

Transmission Electron ◽

Response Range ◽

The One

Abstract In this study, we synthesized a series of rhodium-modified and Ti3+ self-doped TiO2 (Rh/Ti3+-TiO2) nanocomposites via the one-pot method. We prepared samples of Rh/Ti3+-TiO2, which were analyzed using X-ray diffraction (XRD), transmission electron microscopy (TEM), X-ray photoelectron spectroscopy (XPS), Electron Spin Resonance (ESR), and Uv-vis-NIR analysis. We found that the ability of TiO2 to absorb near-infrared and visible light was significantly improved by the Rh/Ti3+-TiO2 nanocomposites, due to Ti3+ doping as well as modification of Rh. The disinfection properties of these materials were tested using Staphylococcus aureus under visible light and NIR light excitations. The synthesized photocatalyst was found to exhibit significantly enhanced photocatalytic inactivation of S. aureus under both visible and NIR light irradiation, as compared to pure TiO2. This was particularly true with respect to the 5% Rh/Ti3+-TiO2 sample. Our results suggest that the Rh/Ti3+-TiO2 composites could extend the range of optical response range of pure nano TiO2 materials to the Vis -NIR region.

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ZnSe Quantum Dots through a Facile one Pot Synthesis Process

Journal of Nano Research ◽

10.4028/www.scientific.net/jnanor.34.73 ◽

2015 ◽

Vol 34 ◽

pp. 73-78

Author(s):

Irtiqa Syed ◽

Santa Chawla

Keyword(s):

Quantum Dots ◽

Band Gap ◽

Quantum Confinement Effect ◽

Hexagonal Phase ◽

Fluorescence Decay ◽

Synthesis Process ◽

One Pot ◽

One Pot Synthesis ◽

Transmission Electron ◽

Average Size

A novel one pot synthesis approach in oleic acid medium was employed to obtain monophasic ZnSe quantum dots (QD) of average size 3.7nm. The QDs were well crystalline in hexagonal phase as revealed by x-ray diffraction and high resolution transmission electron microscopy (HRTEM) studies. The ZnSe QDs exhibit sharp emission peak in the blue (465nm) with 385picosecond fluorescence decay time. The theoretical band gap corresponding to 3.7nm ZnSe QDs matched well with the measured 3.11eV band gap of synthesized QDs which thus showed quantum confinement effect.

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Immobilization of BiOBr/BiOI Hierarchical Microspheres on Fly Ash Cenospheres as Visible Light Photocatalysts

Australian Journal of Chemistry ◽

10.1071/ch15157 ◽

2016 ◽

Vol 69 (1) ◽

pp. 119 ◽

Cited By ~ 3

Author(s):

Li Lin ◽

Ya Wang ◽

Manhong Huang ◽

Donghui Chen

Keyword(s):

Photocatalytic Activity ◽

Fly Ash ◽

Visible Light ◽

Diffuse Reflectance Spectroscopy ◽

Three Dimensional ◽

One Pot ◽

Transmission Electron ◽

Hierarchical Microspheres ◽

2D Nanosheets ◽

Fly Ash Cenospheres

Three-dimensional (3D) BiOBr/BiOI hierarchical microspheres were successfully fabricated on the surface of fly ash cenospheres (FACs) via a facile one-pot solvothermal method for the first time. The as-prepared samples were characterized by XRD, SEM, energy-dispersive X-ray spectroscopy, UV–visible diffuse reflectance spectroscopy, and high-resolution transmission electron microscopy. The results indicated that the loaded hierarchical microspheres exhibited a uniform distribution, and some aggregation was observed. These well-dispersed hierarchical microspheres were composed of 2D nanosheets, which possess heterojunction structures. Based on the photodegradation tests examining the removal of rhodamine B from water under visible light irradiation (λ > 420 nm), the photocatalytic activity of BiOB/BiOI/FACs was superior to that of BiOBr/FACs and BiOI/FACs. A proposed mechanism for the enhanced photocatalytic activity displayed by BiOB/BiOI/FACs is discussed.

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FeYO3@rGO nanocomposites: Synthesis, characterization and application in photooxidative degradation of atrazine under visible light

Materials Express ◽

10.1166/mex.2021.1957 ◽

2021 ◽

Vol 11 (5) ◽

pp. 706-716

Author(s):

Nada D. Al-Khthami ◽

Tariq Altalhi ◽

Mohammed Alsawat ◽

Mohamed S. Amin ◽

Yousef G. Alghamdi ◽

...

Keyword(s):

Visible Light ◽

Photoelectron Spectroscopy ◽

Sol Gel ◽

Bandgap Energy ◽

X Ray Diffraction ◽

X Ray ◽

Transmission Electron ◽

Reduced Graphene ◽

Structural Surface ◽

Adsorption Desorption

Different organic pollutants have been remediated photo catalytically by applying perovskite photocatalysts. Atrazine (ATR) is a pesticide commonly detected as a pollutant in drinking, surface and ground water. Herein, FeYO3@rGO heterojunction was synthesized and applied for photooxidation decomposition of ATR. First, FeYO 3nanoparticles (NPs) were prepared via routine sol-gel. After that, FeYO3 NPs were successfully incorporated with different percentages (5, 10, 15 and 20 wt.%) of reduced graphene oxide (rGO) in the synthesis of novel FeYO3@rGO photocatalyst. Morphological, structural, surface, optoelectrical and optical characteristics of constructed materials were identified via X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), Transmission electron microscopy (TEM), adsorption/desorption isotherms, diffusive reflectance (DR) spectra, and photoluminescence response (PL). Furthermore, photocatalytic achievement of the constructed materials was evaluated via photooxidative degradation of ATR. Various investigations affirmed the usefulness of rGO incorporation on the advancement of formed photocatalysts. Actually, novel nanocomposite containing rGO (15 wt.%) possessed diminished bandgap energy, as well as magnified visible light absorption. Furthermore, such nanocomposite presented exceptional photocatalytic achievement when exposed to visible light as ATR was perfectly photooxidized over finite amount (1.6 g · L-1) from the optimized photocatalyst when illuminated for 30 min. The advanced photocatalytic performance of constructed heterojunctions could be accredited mainly to depressed recombination amid induced charges. The constructed FeYO3@rGO nanocomposite is labelled as efficient photocatalyst for remediation of herbicides from aquatic environments.

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One-pot hydrothermal synthesis of g-C3N4/Ag/AgCl/BiVO4 micro-flower composite for the visible light degradation of ibuprofen

Chemical Engineering Journal ◽

10.1016/j.cej.2018.02.042 ◽

2018 ◽

Vol 341 ◽

pp. 248-261 ◽

Cited By ~ 49

Author(s):

Rokhsareh Akbarzadeh ◽

Christopher S.L. Fung ◽

Rayees Ahmad Rather ◽

Irene M.C. Lo

Keyword(s):

Hydrothermal Synthesis ◽

Visible Light ◽

One Pot ◽

Visible Light Degradation

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One-pot hydrothermal synthesis of willow branch-shaped MoS2/CdS heterojunctions for photocatalytic H2 production under visible light irradiation

Chinese Journal of Catalysis ◽

10.1016/s1872-2067(18)63178-x ◽

2019 ◽

Vol 40 (3) ◽

pp. 371-379 ◽

Cited By ~ 50

Author(s):

Zhen-Wei Zhang ◽

Qiu-Hao Li ◽

Xiu-Qing Qiao ◽

Dongfang Hou ◽

Dong-Sheng Li

Keyword(s):

Hydrothermal Synthesis ◽

Visible Light ◽

Visible Light Irradiation ◽

H2 Production ◽

Light Irradiation ◽

One Pot

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Photocatalytic Activity of Monosized AuZnO Composite Nanoparticles

Applied Sciences ◽

10.3390/app9010111 ◽

2018 ◽

Vol 9 (1) ◽

pp. 111 ◽

Cited By ~ 1

Author(s):

Chenguang Ma ◽

Xianhong Wang ◽

Shixia Zhan ◽

Xuemei Li ◽

Xiao Liu ◽

...

Keyword(s):

Photocatalytic Activity ◽

Ethylene Glycol ◽

Visible Light ◽

Composite Nanoparticles ◽

Narrow Particle Size Distribution ◽

One Pot ◽

X Ray ◽

Transmission Electron ◽

Suitable Amount ◽

Copolymer Poly

Photocatalytic activity of monosized AuZnO composite nanoparticles with different compositions were synthesized by the one-pot polyol procedure, using the triblock copolymer poly(ethylene glycol)-block-poly(propylene glycol)-blockpoly(ethylene glycol) (PEO-PPO-PEO) as the surfactant. The structure and morphology of the composite nanoparticles were analyzed by X-ray diffraction (XRD), energy dispersive X-ray analysis (EDX), selected area electron diffraction (SAED), a transmission electron microscope (TEM) and high resolution transmission electron microscopy (HRTEM). The characterization showed that the AuZnO composite nanoparticles were spherical, with narrow particle size distribution and high crystallinity. The Fourier transform infrared spectroscopy (FTIR) study confirms the PEO-PPO-PEO molecules on the surface of the composite nanoparticles. The investigations by ultraviolet-visible light absorbance spectrometer (UV-Vis) and photoluminescence spectrophotometer (PL) demonstrate well the dispersibility and excellent optical performance of the AuZnO composite nanoparticles. Photocatalytic activity and reusability of the AuZnO nanoparticles in UV and visible light regions was evaluated by the photocatalytic degradation of Rhodamine B (RhB). The experimental results show that the AuZnO composite nanoparticles with a suitable amount of Au loading have stability and improved photocatalytic activity. AuZnO composite nanoparticles are effective and stable for the degradation of organic pollutants in aqueous solution.

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