scholarly journals Ag2CO3 Decorating BiOCOOH Microspheres with Enhanced Full-Spectrum Photocatalytic Activity for the Degradation of Toxic Pollutants

Nanomaterials ◽  
2018 ◽  
Vol 8 (11) ◽  
pp. 914 ◽  
Author(s):  
Shijie Li ◽  
Liuye Mo ◽  
Yanping Liu ◽  
Huiqiu Zhang ◽  
Yaming Ge ◽  
...  
Keyword(s):  
Photocatalytic Activity ◽  
Environmental Remediation ◽  
Photocatalytic Performance ◽  
Type I ◽  
Simulated Sunlight ◽  
Practical Application ◽  
Pollutant Degradation ◽  
Full Spectrum ◽  
Sunlight Irradiation ◽  
Toxic Pollutants

The development of excellent full-spectrum photocatalysts is of vital significance to its practical application in environmental remediation. Herein, flower-like Ag2CO3/BiOCOOH type I heterostructures were prepared via a facile method and exhibited powerful photocatalytic activity by removing various toxic pollutants (rhodamine B, methyl blue, and tetracycline hydrochloride) under simulated sunlight irradiation. The boosted photocatalytic performance is attributed to the expanded range of the absorption spectrum and alleviated separation rate of the photo-induced electrons and holes. The photoluminescence spectra and trapping experiment were applied to clarify the photocatalytic reaction mechanism of Ag2CO3/BiOCOOH. The holes and •O2− were detected as the dominant reactive species involved in pollutant degradation. This work provides a novel full-spectrum-driven photocatalyst of Ag2CO3/BiOCOOH, which could effectively degrade toxic pollutants under simulated sunlight.

Electrospun TiO2 embedded nanofibers for photocatalytic applications

2019 ◽  
Vol 34 (01n03) ◽  
pp. 2040015
Author(s):  
Junyao Wu ◽  
Alexandre Pernin ◽  
Yixuan Wang ◽  
Han Wang ◽  
Jun Yao ◽  
...  
Keyword(s):  
Titanium Dioxide ◽  
Photocatalytic Activity ◽  
Environmental Remediation ◽  
Low Cost ◽  
High Reactivity ◽  
Simulated Sunlight ◽  
Electrospinning Technique ◽  
Sunlight Irradiation ◽  
Text Content ◽  
Photocatalytic Applications

The development of photocatalysts with low cost, high reactivity and easy recovery provides great potentials for environmental remediation. In this study, polyacrylonitrile (PAN) nanofibers containing titanium dioxide ([Formula: see text]) nanoparticles were successfully fabricated using a facile electrospinning technique. The effects of [Formula: see text] content, PAN concentration and thermal treatment on the adsorption and photocatalysis properties of [Formula: see text] nanofibers have been investigated. The results indicate that the embedded [Formula: see text] nanofibers possess the property to effectively decompose rhodamine B (RhB) under simulated sunlight irradiation. The enhanced photocatalytic activity can be attributed to the loading of [Formula: see text] nanoparticles and the property of polymer matrix.

scholarly journals Porous Polymer-Titanium Dioxide/Copper Composite with Improved Photocatalytic Activity toward Degradation of Organic Pollutants in Wastewater: Fabrication and Characterization as Well as Photocatalytic Activity Evaluation

Catalysts ◽  
2020 ◽  
Vol 10 (3) ◽  
pp. 310 ◽  
Author(s):  
Qijie Xu ◽  
Yan Wang ◽  
Mei Chi ◽  
Wenbin Hu ◽  
Ning Zhang ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Titanium Dioxide ◽  
Photocatalytic Activity ◽  
Organic Pollutants ◽  
Photocatalytic Performance ◽  
Hydrothermal Process ◽  
Porous Polymer ◽  
Tetrabutyl Titanate ◽  
Simulated Sunlight ◽  
Sunlight Irradiation

Titanium dioxide (TiO2) and TiO2/copper (denoted as TC) composite were prepared via hydrothermal process. In the meantime, divinylbenzene (DVB) and bismaleimide (BMI) monomers were allowed to participate in in-situ radical polymerization in the presence of azobisisobutyronitrile (AIBN) initiator to afford porous polymers (abridged as PP). The as-obtained PP were mixed together with tetrabutyl titanate (TBT) and CuSO4·5H2O in vacuum to obtain PP/TC composite (denoted as PPTC) containing incorporated TC composite in the pores of PP. The as-prepared TiO2, TC, and PPTC were characterized by transmission electron microscopy, scanning electron microscopy, X-ray diffraction, fluorescence spectrometry, and electron spin resonance spectrometry, and so on. Furthermore, their photocatalytic activity for the degradation of N,N-dimethylformamide, methyl orange, phenol, and methylene blue under the irradiation of simulated sunlight (Xe lamp light) and natural sunlight were investigated. Findings indicated that, whether under simulated sunlight or nature sunlight irradiation, PPTC exhibited much better photocatalytic performance than TiO2 and TC for the degradation of the tested organic pollutants. Particularly, it allowed N,N-dimethylformamide (DMF) to be degraded by a rate of 73.7% under simulated sunlight irradiation and it retained photocatalytic activity even after six cycles of reuse, exhibiting promising potential for the removal of organic pollutants in wastewater (including industrial water, aquaculture wastewater, and domestic sewage). The desired photocatalytic performance of the as-prepared PPTC is attributed to two aspects. Namely, the incorporation of Cu2+ into the fine structure of TiO2 contributes to increasing photocatalyst activity and producing more free radical while the embedding of TC composite into the PP pores improves to the contact area between the photocatalyst and organic pollutants, and both are beneficial for improving the adsorption capacity and activity of the photocatalyst, thereby enhancing the degradation of the organic pollutants.

The Study on the Influential Factors of Photocatalytic Performance of Eosin-Sensitized TiO2 Nanoparticles

2013 ◽  
Vol 827 ◽  
pp. 3-7
Author(s):  
Shun Jiang He ◽  
Xue Yan Du ◽  
Qiao Wang ◽  
Jing Xu
Keyword(s):  
Photocatalytic Activity ◽  
Methyl Orange ◽  
Photocatalytic Degradation ◽  
Degradation Rate ◽  
Photocatalytic Performance ◽  
Influential Factors ◽  
Sunlight Irradiation ◽  
Sensitization Time

The photocatalytic activity of eosin-sensitized TiO2 nanoparticles on photocatalytic degradation rate (PDR) of methyl orange under sunlight irradiation was studied. The influential factors on the degradation, such as eosin concentration, TiO2 dosage, sensitization time and sensitization temperature were also investigated. The results show that: The performance of TiO2 nanoparticles for PDR of methyl orange has been improved obviously for eosin sensitizing. The PDR of methyl orange reached 45.28% under the conditions of eosin concentration of 20mg/L, TiO2 dosage of 0.5000g/L, sensitization time of 24h and sensitization temperature of 20°C.

Construction of LZU1@WO3 heterojunction photocatalysts: enhanced photocatalytic performance and mechanism insight

2021 ◽  
Vol 45 (36) ◽  
pp. 17025-17036
Author(s):  
Simin Shang ◽  
Huaizhi Yang ◽  
Dajun Shi ◽  
Bowen Dong ◽  
Heling Zhang ◽  
...  
Keyword(s):  
Photocatalytic Activity ◽  
Hydrogen Production ◽  
Hybrid Materials ◽  
Photocatalytic Performance ◽  
Production Capacity ◽  
Simulated Sunlight ◽  
Composite Photocatalysts ◽  
Performance And Mechanism

Our well-designed nano-WO3@LZU1 composite photocatalysts were fully characterized. Under simulated sunlight, the hybrid materials showed much higher photocatalytic activity for BBR degradation and MB degradation than WO3 or LZU1, and improved hydrogen production capacity.

Preparation and characterization of CdWO4:Cu nanorods with enhanced photocatalytic performance under sunlight irradiation

2020 ◽  
Vol 44 (6) ◽  
pp. 2380-2388 ◽  
Author(s):  
Kura Narsimha ◽  
M. Shekar Babu ◽  
N. Anuradha ◽  
Swarupa Guda ◽  
B. Kranthi Kumar ◽  
...  
Keyword(s):  
Photocatalytic Activity ◽  
Photocatalytic Performance ◽  
Sunlight Irradiation ◽  
Effect Of Copper

The objective of this work is to convert an ultraviolet active photocatalyst to a visible active photocatalyst and investigate the effect of copper (Cu2+) doping on the morphology and photocatalytic activity of CdWO4.

Preparation and High Degradation Activity of Supported Nano-Bi2WO6–TiO2/Nickel Foam Photocatalyst

NANO ◽  
2015 ◽  
Vol 10 (06) ◽  
pp. 1550077 ◽  
Author(s):  
Qin Tong ◽  
Ya-Mei Dong ◽  
Xiao-Jia Wang ◽  
Peng Yan ◽  
Dan-Nong He
Keyword(s):  
Thermal Stability ◽  
Photocatalytic Activity ◽  
Photocatalytic Performance ◽  
Nickel Foam ◽  
High Photocatalytic Activity ◽  
Silica Sol ◽  
Sunlight Irradiation ◽  
Highly Dispersed ◽  
Degradation Activity ◽  
Spraying Method

The supported nano- Bi 2 WO 6– TiO 2/nickel foam photocatalyst was synthesized via spraying method with silica sol as a binder. The as-prepared photocatalyst with large surface and thermal stability exhibited enhanced photocatalytic performance for degradation of Rhodamine B ( RhB ) solution in sunlight irradiation. The results showed that the RhB solution could be degraded to 71.6% within 60min, exhibiting that improved photocatalytic activity increased by 77.6%, compared with that of pure Bi 2 WO 6– TiO 2 nanoparticles. Its high photocatalytic activity was due to the presence of nickel foam in the catalytic process, making the Bi 2 WO 6– TiO 2 highly dispersed and increasing the contact area of the photocatalysts with the organic pollutants. At the same time, a possible photocatalytic mechanism for the enhanced photocatalytic performance was investigated.

scholarly journals Preparation ofBiFeO3-Graphene Nanocomposites and Their Enhanced Photocatalytic Activities

2013 ◽  
Vol 2013 ◽  
pp. 1-5 ◽  
Author(s):  
J. F. Dai ◽  
T. Xian ◽  
L. J. Di ◽  
H. Yang
Keyword(s):  
Photocatalytic Performance ◽  
Ethanol Solution ◽  
Oh Radicals ◽  
Simulated Sunlight ◽  
Sunlight Irradiation ◽  
Graphene Nanocomposites ◽  
Photogenerated Electrons ◽  
Photocatalytic Activities ◽  
Enhanced Yield ◽  
Efficient Transfer

BiFeO3nanoparticles were prepared via a polyacrylamide gel route. BiFeO3-graphene nanocomposites were fabricated by mixing BiFeO3nanoparticles and graphene into absolute ethanol solution followed by thermal drying. The TEM observation demonstrates that the BiFeO3nanoparticles are well anchored onto graphene sheets. The photocatalytic activities of the as-prepared samples were evaluated by the degradation of methyl orange (MO) under simulated sunlight irradiation. Compared to bare BiFeO3nanoparticles, BiFeO3-graphene nanocomposites exhibit enhanced photocatalytic activity. The outstanding photocatalytic performance is mainly ascribed to the efficient transfer of photogenerated electrons from BiFeO3to graphene, thus leading to an increased availability of h+for the photocatalytic reaction. In addition, hydroxyl (·OH) radicals were detected by the photoluminescence technique using terephthalic acid as a probe molecule and are found to be produced on the irradiated BiFeO3and BiFeO3-graphene nanocomposites; in particular, an enhanced yield is observed for the latter.

scholarly journals Growth Process and CQDs-modified Bi4Ti3O12 Square Plates with Enhanced Photocatalytic Performance

Micromachines ◽  
2019 ◽  
Vol 10 (1) ◽  
pp. 66 ◽  
Author(s):  
Xinxin Zhao ◽  
Hua Yang ◽  
Ziming Cui ◽  
Xiangxian Wang ◽  
Zao Yi
Keyword(s):  
Electron Microscopy ◽  
Photocatalytic Activity ◽  
Visible Light ◽  
Growth Process ◽  
Photocatalytic Performance ◽  
Simulated Sunlight ◽  
Hydrothermal Route ◽  
Electron Hole ◽  
X Ray ◽  
Photocurrent Spectroscopy

Bi4Ti3O12 square plates were synthesized via a hydrothermal route, and their growth process was systematically investigated. Carbon quantum dots (CQDs) were prepared using glucose as the carbon source, which were then assembled on the surface of Bi4Ti3O12 square plates via a hydrothermal route with the aim of enhancing the photocatalytic performance. XRD (X-ray powder diffraction), SEM (scanning electron microscopy), TEM (transmission electron microscopy), UV-vis DRS (diffuse reflectance spectroscopy), XPS (X-ray photoelectron spectroscopy), FTIR (Fourier transform infrared spectroscopy), PL (photoluminescence) spectroscopy, EIS (electrochemical impedance spectroscopy) and photocurrent spectroscopy were used to systematically characterize the as-prepared samples. It is demonstrated that the decoration of CQDs on Bi4Ti3O12 plates leads to an increased visible light absorption, slightly increased bandgap, increased photocurrent density, decreased charge-transfer resistance, and decreased PL intensity. Simulated sunlight and visible light were separately used as a light source to evaluate the photocatalytic activity of the samples toward the degradation of RhB in aqueous solution. Under both simulated sunlight and visible light irradiation, CQDs@Bi4Ti3O12 composites with an appropriate amount of CQDs exhibit obviously enhanced photocatalytic performance. However, the decoration of excessive CQDs gives rise to a decrease in the photocatalytic activity. The enhanced photocatalytic activity of CQDs-modified Bi4Ti3O12 can be attributed to the following reasons: (1) The electron transfer between Bi4Ti3O12 and CQDs promotes an efficient separation of photogenerated electron/hole pairs in Bi4Ti3O12; (2) the up-conversion photoluminescence emitted from CQDs could induce the generation of additional electron/hole pairs in Bi4Ti3O12; and (3) the photoexcited electrons in CQDs could participate in the photocatalytic reactions.

scholarly journals Influence of different bismuth oxyhalides on the photocatalytic activity of graphitic carbon nitride: a comparative study under natural sunlight

2020 ◽  
Vol 1 (5) ◽  
pp. 1262-1272 ◽  
Author(s):  
Mahender Singh ◽  
Ashish Kumar ◽  
Venkata Krishnan
Keyword(s):  
Photocatalytic Activity ◽  
Charge Transfer ◽  
Comparative Study ◽  
Carbon Nitride ◽  
Photocatalytic Performance ◽  
Organic Pollutant ◽  
Graphitic Carbon Nitride ◽  
Pollutant Degradation ◽  
Organic Pollutant Degradation ◽  
Bismuth Oxyhalides

The BiOX/g-C3N4 composites showed enhanced photocatalytic performance towards organic pollutant degradation owing to the boosted charge transfer over the binary interfaces.

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