scholarly journals Photocatalysis and UV-blocking properties of cotton fabric functionalized with BiPO4 nanorods

2019 ◽  
Vol 14 ◽  
pp. 155892501988881
Author(s):  
Jiarui Jin ◽  
Ning Li ◽  
Yun Xie
Keyword(s):  
Cotton Fabric ◽  
Photoelectron Spectroscopy ◽  
Diffraction Field ◽  
Diffuse Reflection Spectroscopy ◽  
Reflection Spectroscopy ◽  
X Ray Diffraction ◽  
X Ray ◽  
Uv Blocking ◽  
Coated Fabric ◽  
Bismuth Phosphate

Uniform monoclinite bismuth phosphate (BiPO4) nanorods were fixed on commonly used cotton fabric using two-dip–two-nip technique. Chitosan and acetic acid were applied to act as cross-linking agent in preparing the finishing solution. In this article, BiPO4 nanorods modified cotton fabrics for UV-blocking, as well as photocatalytic degradation of RhB has been studied. This coated fabric was characterized by X-ray diffraction, field-emission scanning electron microscopy equipped with energy-dispersive X-ray spectrometer, X-ray photoelectron spectroscopy, Fourier transform infrared spectroscopy, and UV–Vis diffuse reflection spectroscopy. Furthermore, UV-blocking and photocatalytic properties were also tested. The coated fabric showed better properties compared to uncoated fabric.

scholarly journals Preparation of BiOCl/Bi2WO6 Photocatalyst for Efficient Fixation on Cotton Fabric: Applications in UV Shielding and Self-Cleaning Performances

Materials ◽  
2021 ◽  
Vol 14 (22) ◽  
pp. 7002
Author(s):  
Jiayi Chen ◽  
Kuang Wang ◽  
Jialong Tian ◽  
Wenhui Yu ◽  
Yujie Chen ◽  
...  
Keyword(s):  
Visible Light ◽  
Cotton Fabric ◽  
Photoelectron Spectroscopy ◽  
Cotton Fabrics ◽  
Diffuse Reflection Spectroscopy ◽  
X Ray Diffraction ◽  
X Ray ◽  
Visible Light Driven ◽  
Blue Solution ◽  
Self Cleaning

In this work, a visible-light-driven BiOCl/Bi2WO6 photocatalyst was obtained via a facile hydrothermal method and characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), energy-dispersive spectrometry (EDS), X-ray photoelectron spectroscopy (XPS), ultraviolet/visible light diffuse reflection spectroscopy (UV/Vis), and photocurrent (PC). BiOCl/Bi2WO6 was modified with (3-chloro-2-hydroxypropyl) trimethyl ammonium chloride to obtain the cationized BiOCl/Bi2WO6. Cotton fabric was pretreated with sodium hydroxide (NaOH) and sodium chloroacetate solution to obtain carboxymethylated cotton fabric, which was further reacted with cationized BiOCl/Bi2WO6 to achieve finished cotton fabric. The cotton fabrics were characterized by Fourier-transform infrared spectroscopy (FT-IR), XRD, SEM, and EDS. The photocatalytic activity of the BiOCl/Bi2WO6 photocatalyst and cotton fabrics was assessed by photocatalytic degradation of MB (methylene blue) solution under simulated visible light. The self-cleaning property of cotton fabrics was evaluated by removing MB solution and red-wine stains. Results revealed that the coated cotton fabrics exhibited appreciable photocatalytic and self-cleaning performance. In addition, anti-UV studies showed that the finished cotton fabrics had remarkable UV blocking properties in the UVA and UVB regions. Therefore, the finished cotton fabric with BiOCl/Bi2WO6 can provide a framework for the development of multifunctional textiles.

scholarly journals Electromagnetic Shielding by MXene-Graphene-PVDF Composite with Hydrophobic, Lightweight and Flexible Graphene Coated Fabric

Materials ◽  
2018 ◽  
Vol 11 (10) ◽  
pp. 1803 ◽  
Author(s):  
Kanthasamy Raagulan ◽  
Ramanaskanda Braveenth ◽  
Hee Jang ◽  
Yun Seon Lee ◽  
Cheol-Min Yang ◽  
...  
Keyword(s):  
Photoelectron Spectroscopy ◽  
Spray Coating ◽  
Cost Effective ◽  
Work Of Adhesion ◽  
Shielding Effectiveness ◽  
X Ray Diffraction ◽  
X Ray ◽  
Highest Weight ◽  
Coated Fabric ◽  
Hydrophobic Nature

MXene and graphene based thin, flexible and low-density composite were prepared by cost effective spray coating and solvent casting method. The fabricated composite was characterized using Raman spectroscopy, X-ray diffraction (XRD), scanning electron microscope (SEM), X-ray photoelectron spectroscopy (XPS) and energy dispersive X-ray (EDX). The prepared composites showed hydrophobic nature with higher contact angle of 126°, −43 mN·m−1 wetting energy, −116 mN·m−1 spreading Coefficient and 30 mN·m−1 lowest work of adhesion. The composites displayed excellent conductivity of 13.68 S·cm−1 with 3.1 Ω·sq−1 lowest sheet resistance. All the composites showed an outstanding thermal stability and constrain highest weight lost until 400 °C. The MXene-graphene foam exhibited excellent EMI shielding of 53.8 dB (99.999%) with reflection of 13.10 dB and absorption of 43.38 dB in 8–12.4 GHz. The single coated carbon fabric displayed outstanding absolute shielding effectiveness of 35,369.82 dB·cm2·g−1. The above results lead perspective applications such as aeronautics, radars, air travels, mobile phones, handy electronics and military applications.

scholarly journals Visible light Bi2S3/BiFeO3 photocatalyst for effective removal of Rhodamine B

2018 ◽  
Vol 238 ◽  
pp. 03007
Author(s):  
Xiquan Wang ◽  
Nan Zhang ◽  
Gao Wang
Keyword(s):  
Photocatalytic Activity ◽  
Visible Light ◽  
Rhodamine B ◽  
Photocatalytic Performance ◽  
Diffuse Reflection Spectroscopy ◽  
Reflection Spectroscopy ◽  
X Ray Diffraction ◽  
Exchange Method ◽  
X Ray ◽  
Effective Removal

Bi2S3-sensitized BiFO3 (BFO) photocatalyst (Bi2S3/BFO) was successfully synthesized through a facile and environmental ion exchange method between BFO and Thiosurea (H2NCSNH2, TU). The photocatalysts were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), energy-dispersive X-ray spectroscopy (EDS) and UV-vis diffuse reflection spectroscopy (DRS). The obtained Bi2S3/BFO composites showed excellent photocatalytic performance for decomposing Rhodamine B (RhB) compared with pure BFO under visible light irradiation (λ>400nm). 5% Bi2S3/BFO exhibited the highest photocatalytic activity and excessive amount of Bi2S3 would result in the decrease of photocatalytic activity of BFO. The mechanism of enhanced photocatalytic activity was proposed on the basis of the calculated energy band positions.

STUDIES ON SURFACE STRUCTURE, MORPHOLOGY AND COMPOSITION OF Co–W COATINGS ELECTRODEPOSITED WITH DIRECT AND PULSE CURRENT USING GLUCONATE BATH

2013 ◽  
Vol 20 (01) ◽  
pp. 1350006 ◽  
Author(s):  
PARTHASARATHI BERA ◽  
H. SEENIVASAN ◽  
K. S. RAJAM
Keyword(s):  
Photoelectron Spectroscopy ◽  
Pulse Current ◽  
Diffraction Field ◽  
X Ray Diffraction ◽  
Scanning Calorimetry ◽  
X Ray ◽  
Force Microscopy ◽  
Dsc Studies ◽  
Atomic Force ◽  
Electrodeposited Coating

Co–W alloy coatings were deposited with direct current (DC) and pulse current (PC) electrodeposition methods using gluconate bath at pH5 and characterized by X-ray diffraction, field emission scanning electron microscopy, atomic force microscopy, differential scanning calorimetry (DSC) and X-ray photoelectron spectroscopy (XPS). DSC studies hint at the possibility of formation of metallic glasses. Detailed XPS studies of these alloy coatings have been carried out to compare elemental states and composition of Co and W in DC and PC electrodeposited alloys. DC-plated alloy has significant amount of Co and W metal along with their respective oxidized species. In contrast, mainly oxidized metals are present in the following layers of as-deposited coatings prepared with PC plating. Concentration of Co metal is observed to increase during sputtering, whereas there is no change in W6+ concentration. Microhardness measurement of all the Co–W coatings shows higher hardness compared to Co metal and 1:1 and 1:4 PC electrodeposited coatings show little higher hardness compared to 1:2 PC electrodeposited coating.

Denitrification of water using ZnO/Cu as the photocatalyst

2018 ◽  
Vol 7 (3) ◽  
pp. 255-259 ◽  
Author(s):  
Ehasn Rahmani ◽  
Mohammad Rahmani
Keyword(s):  
Diffuse Reflection ◽  
Nano Particles ◽  
Diffuse Reflection Spectroscopy ◽  
Reflection Spectroscopy ◽  
X Ray Diffraction ◽  
Spectroscopy Analysis ◽  
Wet Impregnation ◽  
X Ray ◽  
Nanoparticle Morphology

Abstract The ZnO:xCu photocatalyst was prepared with reacting media, namely, water method followed by wet impregnation to deposit Cu on the ZnO nano particles. X-ray diffraction was used to perform crystallography and the determination of the ZnO:xCu particle size. Fourier transform infrared was employed for the detection of chemical bonds in the synthesized photocatalyst. The nanoparticle morphology was studied by field emission scanning electron microscope. The elemental composition of the synthesized catalysts was evaluated with X-ray fluorescence technique. Diffuse reflection spectroscopy analysis was performed to investigate the light absorption of the ZnO:xCu catalysts. The photocatalytic activity of the prepared ZnO:xCu nanoparticles was studied for the removal of nitrate from the aqueous solution of ammonium nitrate (50 mg·l−1) under UV irradiation. Results indicated that the ZnO:xCu photocatalyst has high photocalytic activity to remove nitrate from water. Moreover, complete degradation was achieved after 2.5 h.

scholarly journals Synthesis of novel and stable g-C 3 N 4 -Bi 2 WO 6 hybrid nanocomposites and their enhanced photocatalytic activity under visible light irradiation

2018 ◽  
Vol 5 (3) ◽  
pp. 171419 ◽  
Author(s):  
Haitao Li ◽  
Na Li ◽  
Ming Wang ◽  
Beiping Zhao ◽  
Fei Long
Keyword(s):  
Electron Microscopy ◽  
Photoelectron Spectroscopy ◽  
Photogenerated Electron ◽  
Hybrid Nanocomposites ◽  
Diffuse Reflection Spectroscopy ◽  
X Ray Diffraction ◽  
X Ray ◽  
Transmission Electron ◽  
Composite Photocatalysts ◽  
Lower Energy Region

Graphitic carbon nitride (g-C 3 N 4 ) nanosheets with a thickness of only a few nanometres were obtained by a facile deammoniation treatment of bulk g-C 3 N 4 and were further hybridized with Bi 2 WO 6 nanoparticles on the surface via a solvothermal method. The composite photocatalysts were characterized by powder X-ray diffraction, scanning electron microscopy, transmission electron microscopy, UV–vis diffuse reflection spectroscopy and X-ray photoelectron spectroscopy (XPS). The HR-TEM results show that the nano-sized Bi 2 WO 6 particles were finely distributed on g-C 3 N 4 sheet surface, which forms heterojunction structure. The UV–vis diffuse reflectance spectra (DRS) show that the absorption edge of composite photocatalysts shifts towards lower energy region in comparison with those of pure g-C 3 N 4 and Bi 2 WO 6 . The degradation of methyl orange (MO) tests reveals that the optimum activity of 8 : 2 g-C 3 N 4 -Bi 2 WO 6 photocatalyst is almost 2.7 and 8.5 times higher than those of individual g-C 3 N 4 and Bi 2 WO 6 . Moreover, the recycle experiments depict high stability of the composite photocatalysts. Through the study of the influencing factors, a possible photocatalytic mechanism is proposed. The enhancement in both photocatalytic performance and stability was caused by the synergistic effect, including the effective separation of the photogenerated electron-hole pairs at the interface of g-C 3 N 4 and Bi 2 WO 6 , the smaller the particle size and the relatively larger specific surface area of the composite photocatalyst.

Porous NiCo2S4 Networks as Electrodes for Electrochemical Supercapacitors

NANO ◽  
2016 ◽  
Vol 11 (12) ◽  
pp. 1650133 ◽  
Author(s):  
Jimin Du ◽  
Kaidi Li ◽  
Yongteng Qian ◽  
Mengke Yang ◽  
Huiming Wang ◽  
...  
Keyword(s):  
Photoelectron Spectroscopy ◽  
Solvothermal Method ◽  
High Specific Capacitance ◽  
Diffraction Field ◽  
Electrochemical Supercapacitors ◽  
X Ray Diffraction ◽  
One Pot ◽  
Retention Capacity ◽  
X Ray ◽  
Structure Morphology

Porous NiCo2S4 networks have been successfully synthesized by a facile one-pot solvothermal method without the use of any surfactant or template. Crystal structure, morphology, composition and surface area of the as-synthesized samples were characterized by X-ray diffraction, field-emission scanning electron microscopy, X-ray photoelectron spectroscopy and Brunauer–Emmet–Teller techniques. Owing to their porous nature and small crystalline size, the as-prepared NiCo2S4 networks based supercapacitor electrodes showed a high specific capacitance of 1250[Formula: see text]F[Formula: see text]g[Formula: see text] at 1[Formula: see text]A[Formula: see text]g[Formula: see text], and excellent cycling stability with the retention capacity of 70.3% after 5000 cycles in the KOH aqueous solution electrolyte.

scholarly journals Synthesis and properties of photocatalysts for the high degradation of sulfadiazine

2021 ◽  
Vol 12 (2) ◽  
pp. 117-123
Author(s):  
Zhenzhao Pei ◽  
Feng Li
Keyword(s):  
Diffuse Reflection ◽  
Diffuse Reflection Spectroscopy ◽  
Reflection Spectroscopy ◽  
X Ray Diffraction ◽  
Solution Ph ◽  
X Ray ◽  
Simulated Solar Light ◽  
Solar Light Irradiation ◽  
Excellent Photocatalytic Activity ◽  
First Time

In this study, it was discovered for the first time that the BiOBr/Bi3.84W0.16O6.24 catalyst can efficiently degrade sulfadiazine (SDZ). Multiple techniques, such as X-ray diffraction (XRD), scanning electron microscopy (SEM), and UV-Vis diffuse reflection spectroscopy (DRS) were applied to research the structures, morphology and photocatalytic properties of as-prepared samples. In addition, the effect of different synthesis pH environment and initial SDZ solution pH on the catalyst degradation efficiency were discussed. The BiOBr/Bi3.84W0.16O6.24 catalyst synthesized under the condition of pH = 7 exhibited excellent photocatalytic activity for photodegradation of SDZ of 91% within 120 min under simulated solar light irradiation. Also, the roles of the radical species have been studied, and the ·O2- and h+ were proved to dominate the photocatalytic process. Based on the experimental results, the photocatalytic mechanism was proposed.

Investigation of the Effect of Uv-Assisted Oxidation and Nitridation of Hafnium Metal Films

2003 ◽  
Vol 780 ◽  
Author(s):  
C. Essary ◽  
V. Craciun ◽  
J. M. Howard ◽  
R. K. Singh
Keyword(s):  
Uv Radiation ◽  
Photoelectron Spectroscopy ◽  
Grazing Angle ◽  
X Ray Diffraction ◽  
Metal Thin Films ◽  
X Ray ◽  
Force Microscopy ◽  
Si Substrates ◽  
Atomic Force ◽  
Silicon Interface

AbstractHf metal thin films were deposited on Si substrates using a pulsed laser deposition technique in vacuum and in ammonia ambients. The films were then oxidized at 400 °C in 300 Torr of O2. Half the samples were oxidized in the presence of ultraviolet (UV) radiation from a Hg lamp array. X-ray photoelectron spectroscopy, atomic force microscopy, and grazing angle X-ray diffraction were used to compare the crystallinity, roughness, and composition of the films. It has been found that UV radiation causes roughening of the films and also promotes crystallization at lower temperatures.Furthermore, increased silicon oxidation at the interface was noted with the UVirradiated samples and was shown to be in the form of a mixed layer using angle-resolved X-ray photoelectron spectroscopy. Incorporation of nitrogen into the film reduces the oxidation of the silicon interface.

scholarly journals α-Cellulose Fibers of Paper-Waste Origin Surface-Modified with Fe3O4 and Thiolated-Chitosan for Efficacious Immobilization of Laccase

Polymers ◽  
2021 ◽  
Vol 13 (4) ◽  
pp. 581
Author(s):  
Gajanan S. Ghodake ◽  
Surendra K. Shinde ◽  
Ganesh D. Saratale ◽  
Rijuta G. Saratale ◽  
Min Kim ◽  
...  
Keyword(s):  
Enzyme Immobilization ◽  
Photoelectron Spectroscopy ◽  
Cellulose Fibers ◽  
Relative Activity ◽  
Significant Activity ◽  
X Ray Diffraction ◽  
X Ray ◽  
Transmission Electron ◽  
Laccase Immobilization ◽  
Surface Modified

The utilization of waste-paper-biomass for extraction of important α-cellulose biopolymer, and modification of extracted α-cellulose for application in enzyme immobilization can be extremely vital for green circular bio-economy. Thus, in this study, α-cellulose fibers were super-magnetized (Fe3O4), grafted with chitosan (CTNs), and thiol (-SH) modified for laccase immobilization. The developed material was characterized by high-resolution transmission electron microscopy (HR-TEM), HR-TEM energy dispersive X-ray spectroscopy (HR-TEM-EDS), X-ray diffraction (XRD), vibrating sample magnetometer (VSM), X-ray photoelectron spectroscopy (XPS), and Fourier transform infrared spectroscopy (FT-IR) analyses. Laccase immobilized on α-Cellulose-Fe3O4-CTNs (α-Cellulose-Fe3O4-CTNs-Laccase) gave significant activity recovery (99.16%) and laccase loading potential (169.36 mg/g). The α-Cellulose-Fe3O4-CTNs-Laccase displayed excellent stabilities for temperature, pH, and storage time. The α-Cellulose-Fe3O4-CTNs-Laccase applied in repeated cycles shown remarkable consistency of activity retention for 10 cycles. After the 10th cycle, α-Cellulose-Fe3O4-CTNs possessed 80.65% relative activity. Furthermore, α-Cellulose-Fe3O4-CTNs-Laccase shown excellent degradation of pharmaceutical contaminant sulfamethoxazole (SMX). The SMX degradation by α-Cellulose-Fe3O4-CTNs-Laccase was found optimum at incubation time (20 h), pH (3), temperatures (30 °C), and shaking conditions (200 rpm). Finally, α-Cellulose-Fe3O4-CTNs-Laccase gave repeated degradation of SMX. Thus, this study presents a novel, waste-derived, highly capable, and super-magnetic nanocomposite for enzyme immobilization applications.

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