Piezoelectric catalytic, photocatalytic and adsorption capability and selectivity removal of various dyes and mixed dye wastewater by ZnO nanoparticles

2022 ◽  
pp. 1-19
Author(s):  
Shengnan Tang ◽  
Huajing Gao ◽  
Shifa Wang ◽  
Leiming Fang ◽  
Xiping Chen ◽  
...  
Keyword(s):  
Particle Size ◽  
Photocatalytic Activity ◽  
Adsorption Capacity ◽  
Rhodamine B ◽  
Zno Nanoparticles ◽  
Chelating Agent ◽  
Catalytic Performance ◽  
Wet Chemistry ◽  
Dependent Behavior ◽  
Internal Mechanism

The C-O functional group decorated ZnO nanoparticles with high UV absorption and VIS/NIR reflectance were synthesized by a simple wet chemistry method using various chelating agents. This study attempts to explore the internal mechanism of the piezoelectric catalytic activity, photocatalytic activity and adsorption performance of ZnO nanoparticles. The phase purity, particle size, optical band gap and photocatalytic activity of ZnO nanoparticles showed strong chelating agent - dependent behavior. The ZnO nanoparticles prepared by using EDTA as a chelating agent exhibits smallest particle size, highest photocatalytic activity for the degradation of methyl orange, methylene blue and rhodamine B, high adsorption capacity for the adsorption of Congo red and high vibration-catalytic performance for the vibration degradation of rhodamine B. The synergies mechanism among piezoelectric catalysis, photocatalysis and adsorption capacity of ZnO nanoparticles are discussed on the basis of the experimental results.

A facile route for the preparation of ZnO/C composites with high photocatalytic activity and adsorption capacity

CrystEngComm ◽  
2014 ◽  
Vol 16 (21) ◽  
pp. 4478-4484 ◽  
Author(s):  
Shuaishuai Ma ◽  
Jinjuan Xue ◽  
Yuming Zhou ◽  
Zewu Zhang ◽  
Xin Wu
Keyword(s):  
Photocatalytic Activity ◽  
Adsorption Capacity ◽  
Zno Nanoparticles ◽  
High Photocatalytic Activity ◽  
Calcination Process ◽  
Facile Route

This manuscript describes the deposition of carbon on the surface of ZnO nanoparticles via a simple adsorption and calcination process.

scholarly journals BiOCl/TiO2/diatomite composites with enhanced visible-light photocatalytic activity for the degradation of rhodamine B

2019 ◽  
Vol 10 ◽  
pp. 1412-1422 ◽  
Author(s):  
Minlin Ao ◽  
Kun Liu ◽  
Xuekun Tang ◽  
Zishun Li ◽  
Qian Peng ◽  
...  
Keyword(s):  
Photocatalytic Activity ◽  
Visible Light ◽  
Visible Light Irradiation ◽  
Rhodamine B ◽  
Sol Gel ◽  
Catalytic Performance ◽  
Light Irradiation ◽  
Molar Ratio ◽  
Visible Light Photocatalytic Activity ◽  
Visible Light Photocatalytic

A BiOCl/TiO2/diatomite (BTD) composite was synthesized via a modified sol–gel method and precipitation/calcination method for application as a photocatalyst and shows promise for degradation of organic pollutants in wastewater upon visible-light irradiation. In the composite, diatomite was used as a carrier to support a layer of titanium dioxide (TiO2) nanoparticles and bismuth oxychloride (BiOCl) nanosheets. The results show that TiO2 nanoparticles and BiOCl nanosheets uniformly cover the surface of diatomite and bring TiO2 and BiOCl into close proximity. Rhodamine B was used as the target degradation product and visible light (λ > 400 nm) was used as the light source for the evaluation of the photocatalytic properties of the prepared BTD composite. The results show that the catalytic performance of the BTD composite under visible-light irradiation is much higher than that of TiO2 or BiOCl alone. When the molar ratio of BiOCl to TiO2 is 1:1 and the calcination temperature is 400 °C, the composite was found to exhibit the best catalytic effect. Through the study of the photocatalytic mechanism, it is shown that the strong visible-light photocatalytic activity of the BTD composite results mainly from the quick migration of photoelectrons from the conduction band of TiO2/diatomite to the surface of BiOCl, which promotes the separation effect and reduces the recombination rate of the photoelectron–hole pair. Due to the excellent catalytic performance, the BTD composite shows great potential for wide application in the field of sewage treatment driven by solar energy.

scholarly journals Pemanfaatan Isolat Selulosa Ampas Tebu sebagai Chelating Agent (CAT) Zat Pewarna pada Jajanan Anak Sekolahan (JAS)

2019 ◽  
Vol 1 (2) ◽  
pp. 34-41
Author(s):  
Romario Abdullah ◽  
Karmila Bilondatu ◽  
Wina Zulfiana Tulie ◽  
Wiwin Rewini Kunusa
Keyword(s):  
Adsorption Capacity ◽  
School Children ◽  
Rhodamine B ◽  
Soft Drink ◽  
Chelating Agent ◽  
Synthetic Dyes ◽  
Cellulose Content ◽  
Adsorption Method ◽  
Bagasse Waste

This study aims to detect synthetic dyes in JAS (School Children Snacks) using a chelating agent (CAT) from bagasse waste. Instrumentation used in the analysis was spectronic 20D. Sugarcane pulp cellulose products as CAT adsorbent rhodamine B coloring agent, metanil yellow and tartrazine in JAS were applied to 10 types of soft drink samples circulating in the market in Gorontalo City. The method used is the adsorption method. The adsorption capacity produced by cellulose with 75% content and α-cellulose content was 37.8% for sample 1 (56%) sample 2 (12%), sample 3 (83%), sample 4 (54%), sample 5 (45%) , sample 6 (54%), sample 7 (51%), sample 8 (27%), sample 9 (69%) and sample 10 (25%). The adsorption capacity produced by cellulose was 88.4% and α-cellulose content was 45.2% for sample 1 (56%) sample 2 (12%), sample 3 (83%), sample 4 (54%), sample 5 (45%) , sample 6 (54%), sample 7 (51%), sample 8 (27%), sample 9 (69%) and sample 10 (25%).

Photocatalytic Activity of ZnO Nanoparticles on the Degradation of Organic Dyes Under Solar Light

2021 ◽  
pp. 514-536
Author(s):  
Sivakumar Krishnamoorthy ◽  
Dharani M.
Keyword(s):  
Methylene Blue ◽  
Photocatalytic Activity ◽  
Organic Pollutants ◽  
Rhodamine B ◽  
Zno Nanoparticles ◽  
Organic Dyes ◽  
Preliminary Investigation ◽  
Solar Light ◽  
Precipitation Method ◽  
Co Precipitation

Zinc oxide (ZnO) nanoparticles prepared using simple co-precipitation method are characterized and photocatalytic activity is tested on the degradation of methylene blue and rhodamine B organic pollutants. Morphological and structural properties of synthesized nanomaterial have been characterized using FESEM, EDAX spectroscopy, and XRD, while UV-visible DRS spectroscopy and photoluminescence have been used to understand their optical properties. The photocatalytic behaviour of synthesized nanoparticles was evaluated on the degradation of methylene blue (MB) and rhodamine B (RhB) organic pollutants under solar light irradiation. The highest degradation was achieved for MB (100%) over RhB (96%). Preliminary investigation shows the effective degradation of organic pollutants by ZnO nanoparticles.

scholarly journals Facile Solvothermal Synthesis of BiOCl/ZnO Heterostructures with Enhanced Photocatalytic Activity

2014 ◽  
Vol 2014 ◽  
pp. 1-9 ◽  
Author(s):  
Yong-Fang Li ◽  
Ming Zhang ◽  
Dan-Lu Guo ◽  
Fei-Xia He ◽  
Ying-Zhu Li ◽  
...  
Keyword(s):  
Photocatalytic Activity ◽  
Ethylene Glycol ◽  
Uv Irradiation ◽  
Rhodamine B ◽  
Zno Nanoparticles ◽  
Solvothermal Synthesis ◽  
Solvothermal Method ◽  
Mixed Solvents ◽  
Photocatalytic Mechanism

Well-defined nanosheet-assembled (BiOCl)x(ZnO)1−xnanoflowers were synthesized by a solvothermal method. It was found that ZnO nanoparticles were anchored on the flower-like BiOCl nanostructures, as demonstrated by varying the initial compositions of the Bi precursor and the volume ratios of mixed solvents (ethylene glycol to water). The as-prepared (BiOCl)0.6(ZnO)0.4nanocomposites showed enhanced photocatalytic activity toward rhodamine B degradation under ultraviolet (UV) irradiation. And the photocatalytic mechanism was discussed in detail.

scholarly journals PREPARATION OF CUPROUS OXIDE NANOPARTICLES USING ASCORBIC ACID AS A REDUCING AGENT AND ITS PHOTOCATALYTIC ACTIVITY

2019 ◽  
Vol 128 (1D) ◽  
Author(s):  
Dang Xuan Du ◽  
Pham Thi Giang Anh
Keyword(s):  
Particle Size ◽  
Ascorbic Acid ◽  
Photocatalytic Activity ◽  
Photocatalytic Degradation ◽  
Rhodamine B ◽  
Cuprous Oxide ◽  
Reducing Agent ◽  
Degradation Ratio ◽  
Ft Ir ◽  
Acid Reduction

<p>In this present paper, cuprous (Cu<sub>2</sub>O) nanoparticles were successfully fabricated by using ascorbic acid as a reducing agent. The purity and characteristics of Cu<sub>2</sub>O nanoparticles were determined by XRD and FT-IR methods. The morphology and particle size of the material were determined by SEM, TEM, respectively. The results showed that the concentration of sodium hydroxide was effective in the morphology and particle size of the material. Furthermore, the Cu<sub>2</sub>O nanoparticles with particle size of 70-80 nm exhibited a good photocatalytic activity on photodegradtion of Rhodamine B by visible light, and the photocatalytic degradation ratio of Rhodamine B attained to 70%.</p><p>Keywords: couprous nanoparticles, ascorbic-acid reduction, photocatalytic degradation, photocatalytic activity, Rhodamine B.</p>

Enhancing the photocatalytic activity of ZnO nanoparticles for efficient rhodamine B degradation by functionalised graphene nanoplatelets

2015 ◽  
Vol 41 (1) ◽  
pp. 1885-1889 ◽  
Author(s):  
Patnarin Worajittiphon ◽  
Kanlaya Pingmuang ◽  
Burapat Inceesungvorn ◽  
Natda Wetchakun ◽  
Sukon Phanichphant
Keyword(s):  
Photocatalytic Activity ◽  
Rhodamine B ◽  
Zno Nanoparticles ◽  
Graphene Nanoplatelets

scholarly journals Comparative Study of Synthesis Parameters of Nanoporous Titania Particles to Improve Structural Properties and Photocatalytic Activity

2021 ◽  
Author(s):  
Zahra Hassankhani-Majd ◽  
Mansoor Anbia
Keyword(s):  
Methylene Blue ◽  
Particle Size ◽  
Photocatalytic Activity ◽  
Freeze Drying ◽  
Chelating Agent ◽  
Nanoporous Materials ◽  
Hydrolysis Method ◽  
Surface Areas ◽  
Synthesis Parameters ◽  
Particle Shapes

Abstract Nanoporous materials have been widely used in many fields. However, their synthesis with uniform particle shapes, pore sizes, pore volumes, and surface areas remains a considerable challenge. Thus, choosing a suitable controllable method for synthesizing nanoporous materials is crucial to obtain appropriate properties. Herein, nanoporous titania particles (NPTPs) were prepared via the hydrothermal. This study investigated how the synthesis parameters such as the type of chelating agent, the hydrolysis method, and the drying technique affected the properties of NPTPs. The synthesis NPTPs were characterized by XRD, FESEM, and BET. The results demonstrated that when acetylacetone (ACAC) (as the chelating agent), the spray-hydrolysis (SH) method, and the freeze-drying (FD) technique were used, NPTPs achieved a more uniform particle shape, a smaller particle size, a larger pore size, a larger pore volume, and a higher surface area. Ultimately, the photocatalytic degradation (PCD) of methylene blue (MB) was examined using improved NPTPs.

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