Preparation and Photocatalytic Degradation of Malachite Green by Photocatalyst SrBi4O7 under Visible Light Irradiation

2014 ◽  
Vol 522-524 ◽  
pp. 411-415 ◽  
Author(s):  
Ying Chun Yang ◽  
Xin Zhi Wang ◽  
Jing Qu
Keyword(s):  
Visible Light ◽  
Photocatalytic Degradation ◽  
Malachite Green ◽  
Visible Light Irradiation ◽  
Diffuse Reflectance ◽  
Irradiation Time ◽  
Light Irradiation ◽  
Reaction Conditions ◽  
Preparation Conditions ◽  
Photocatalytic Activities

Visible-light responsive SrBi4O7 photocatalyst was prepared by a traditional copreparation method. The photocatalyst was characterized by XRD and UV-Vis diffuse reflectance spectra. The as-prepared photocatalysts were used for the photocatalytic degradation of malachite green (MG) under visible light irradiation. Preparation conditions of catalysts, concentration of malachite green, photocatalyst dosage, irradiation time and photocatalytic reaction kinetics have been investigated. Under the optimized reaction conditions, decolourization ratio and COD removal rates of MG were 99.62% and 95.6%, respectively. The results indicate that SrBi4O7 has good photocatalytic activities for the decomposition of MG. And it has the potential higher visible light photocatalytic activity with a band gap of 2.44 eV.

Solvothermal synthesis and visible light-driven photocatalytic degradation for tetracycline of Fe-doped SrTiO3

RSC Advances ◽  
2014 ◽  
Vol 4 (88) ◽  
pp. 47615-47624 ◽  
Author(s):  
Ping Li ◽  
Chunbo Liu ◽  
Guoling Wu ◽  
Yang Heng ◽  
Shuang Lin ◽  
...  
Keyword(s):  
Visible Light ◽  
Photocatalytic Degradation ◽  
Visible Light Irradiation ◽  
Solvothermal Synthesis ◽  
Solvothermal Method ◽  
Light Irradiation ◽  
Photocatalytic Activities ◽  
Visible Light Driven ◽  
Facile Solvothermal Method

In this paper, Fe-doped SrTiO3 (FSTO) photocatalysts were successfully prepared via a facile solvothermal method, and their photocatalytic activities for degrading tetracycline (TC) under visible light irradiation were examined.

Preparation of BiXY(2-X)O3 and its Photocatalytic Degradation of Molasses Fermentation Wastewater under Visible-Light Irradiation

2011 ◽  
Vol 287-290 ◽  
pp. 1640-1645 ◽  
Author(s):  
Min Guang Fan ◽  
Zu Zeng Qin ◽  
Zi Li Liu ◽  
Tong Ming Su
Keyword(s):  
Photocatalytic Activity ◽  
Visible Light ◽  
Photocatalytic Degradation ◽  
Visible Light Irradiation ◽  
Photoelectron Spectroscopy ◽  
Diffuse Reflectance ◽  
Diffuse Reflectance Spectroscopy ◽  
Active Oxygen Species ◽  
Light Irradiation ◽  
X Ray

A series of BixY(2-x)O3photocatalysts were successfully prepared by a solid-state reaction and were subsequently characterized by powder X-ray diffraction, UV-vis diffuse reflectance spectroscopy, and X-ray photoelectron spectroscopy (XPS). The UV-vis diffuse reflectance spectra revealed that the BixY(2-x)O3samples absorbed light in the visible-light range (400-800 nm). The XPS results indicated that active oxygen species were generated on the Bi1.8Y0.2O3surface, which displayed a higher photocatalytic activity. When using photocatalytic degradation molasses fermentation wastewater as a model reaction, the Bi1.8Y0.2O3showed higher photocatalytic activity in comparison to Bi0.2Y1.8O3under visible-light irradiation.

Nano-Sized Nitrogen-Doped Ti-W Mixed Oxides: Preparation and Enhanced Photocatalytic Activities under Visible Light Irradiation

2008 ◽  
Vol 569 ◽  
pp. 1-4
Author(s):  
Yan Fang Shen ◽  
Tian Ying Xiong ◽  
Jian Ku Shang ◽  
Ke Yang
Keyword(s):  
Visible Light ◽  
Visible Light Irradiation ◽  
Diffuse Reflectance ◽  
Mixed Oxides ◽  
Oxygen Demand ◽  
Light Irradiation ◽  
N2 Adsorption ◽  
Nitrogen Doped ◽  
Photocatalytic Activities ◽  
Degussa P25

Nano-sized nitrogen-doped Ti-W mixed oxides (N-TiO2-x%WO3) were prepared by soft chemical method, and their intrinsic characteristics were investigated using XRD, TEM, N2 adsorption and desorption isotherms, UV-Vis diffuse reflectance spectra and XPS. Experiments on photodegradation of Methylene Blue (MB) under visible light irradiation were carried out to evaluate the photocatalytic abilities of N-TiO2-x%WO3. Chemical Oxygen Demand (COD) analysis was also performed to evaluate the mineralization abilities of N-TiO2-x%WO3. It is shown that the N-TiO2-x%WO3 exhibited higher COD removing rates compared with Degussa P25. The color bleaching rates of N-TiO2-x%WO3 were equal to that of Degussa P25. The enhanced photocatalytic activities were probably related to the strong absorption abilities of the N-TiO2-x%WO3.

Highly efficient Ag6Si2O7/WO3 photocatalyst based on heterojunction with enhanced visible light photocatalytic activities

RSC Advances ◽  
2016 ◽  
Vol 6 (105) ◽  
pp. 103289-103295 ◽  
Author(s):  
Yonggang Hu ◽  
Hong Zheng ◽  
Tongzhou Xu ◽  
Ning Xu ◽  
Hongwen Ma
Keyword(s):  
Visible Light ◽  
Photocatalytic Degradation ◽  
Visible Light Irradiation ◽  
Organic Contaminants ◽  
Light Irradiation ◽  
Significant Potential ◽  
Highly Efficient ◽  
Photocatalytic Activities ◽  
Visible Light Photocatalytic

Ag6Si2O7/WO3 (1 : 1) heterojunction photocatalyst shows highly efficient and significant potential for photocatalytic degradation of organic contaminants under visible light irradiation.

scholarly journals Achieving the enhanced photocatalytic degradation of ceftriaxone sodium using CdS-g-C3N4 nanocomposite under visible light irradiation: RSM modeling and optimization

2021 ◽  
Author(s):  
Naime AttariKhasraghi ◽  
Karim Zare ◽  
Ali Mehrizad ◽  
Nasser Modirshahla ◽  
Mohammad Ali Behnajady
Keyword(s):  
Electron Microscopy ◽  
Visible Light ◽  
Photocatalytic Degradation ◽  
Visible Light Irradiation ◽  
Irradiation Time ◽  
Energy Levels ◽  
Light Irradiation ◽  
X Ray ◽  
Ceftriaxone Sodium ◽  
Operational Variables

Abstract In this research, the cadmium sulfide - graphite carbon nitride (CdS-g-C3N4) nanocomposite was synthesized and characterized by X-ray diffraction (XRD), Field emission scanning electron microscopy (FESEM), energy-dispersive X-ray spectrometer (EDX), and transmission electron microscopy (TEM) techniques. The photocatalytic activity of as-prepared nanocomposite was evaluated in the degradation of ceftriaxone sodium (CTX) antibiotic from aqueous solution under visible light irradiation. The influence of the operational variables such as the amount of photocatalyst (g/L), initial CTX concentration (mg/L), pH, and irradiation time (min) on the photodegradation process was investigated and optimized using response surface methodology (RSM) - central composite design (CCD) model. The maximum degradation percentage (92.55 %) was obtained in the optimal condition, including 0.06 g/L of CdS-g-C3N4 photocatalyst, 15 mg/L of CTX, pH= 10.5, and irradiation time = 81 min. The efficient photocatalytic performance of CdS-g-C3N4 nanocomposite is due to the appropriate alignment of energy levels between the CdS and g-C3N4, which synergistically impact the charge separation and the degradation efficiency of CTX. The kinetics of the photocatalytic degradation process was well described by Langmuir-Hinshelwood’s pseudo-first-order model (kapp = 0.0336 min-1).

scholarly journals Optimization of Facile Synthesized ZnO/CuO Nanophotocatalyst for Organic Dye Degradation by Visible Light Irradiation Using Response Surface Methodology

Catalysts ◽  
2021 ◽  
Vol 11 (12) ◽  
pp. 1509
Author(s):  
Vasi Uddin Siddiqui ◽  
Afzal Ansari ◽  
M. Taazeem Ansari ◽  
Md. Khursheed Akram ◽  
Weqar Ahmad Siddiqi ◽  
...  
Keyword(s):  
Response Surface Methodology ◽  
Visible Light ◽  
Photocatalytic Degradation ◽  
Response Surface ◽  
Surface Area ◽  
Visible Light Irradiation ◽  
Irradiation Time ◽  
Light Irradiation ◽  
Individual Parameter ◽  
Validation Experiment

In this study, we aimed to observe how different operating parameters influenced the photocatalytic degradation of rhodamine B (RhB, cationic dye) and bromophenol Blue (BPB, anionic dye) over ZnO/CuO under visible light irradiation. This further corroborated the optimization study employing the response surface methodology (RSM) based on central composite design (CCD). The synthesis of the ZnO/CuO nanocomposite was carried out using the co-precipitation method. The synthesized samples were characterized via the XRD, FT-IR, FE-SEM, Raman, and BET techniques. The characterization revealed that the nanostructured ZnO/CuO formulation showed the highest surface area (83.13 m2·g−1). Its surface area was much higher than that of pure ZnO and CuO, thereby inheriting the highest photocatalytic activity. To substantiate this photocatalytic action, the investigative analysis was carried out at room temperature, associating first-order kinetics at a rate constant of 0.0464 min−1 for BPB and 0.07091 min−1 for RhB. We examined and assessed the binary interactions of the catalyst dosage, concentration of dye, and irradiation time. The suggested equation, with a high regression R2 value of 0.99701 for BPB and 0.9977 for RhB, accurately matched the experimental results. Through ANOVA we found that the most relevant individual parameter was the irradiation time, followed by catalyst dose and dye concentration. In a validation experiment, RSM based on CCD was found to be suitable for the optimization of the photocatalytic degradation of BPB and RhB over ZnO/CuO photocatalysts, with 98% degradation efficiency.

scholarly journals Fabrication of AgCl/Ag3PO4/graphitic carbon nitride heterojunctions for enhanced visible light photocatalytic decomposition of methylene blue, methylparaben and E. coli

RSC Advances ◽  
2021 ◽  
Vol 11 (11) ◽  
pp. 6383-6394 ◽  
Author(s):  
Haishuai Li ◽  
Linlin Cai ◽  
Xin Wang ◽  
Huixian Shi
Keyword(s):  
Methylene Blue ◽  
Visible Light ◽  
Photocatalytic Degradation ◽  
Visible Light Irradiation ◽  
Carbon Nitride ◽  
Light Irradiation ◽  
Graphitic Carbon Nitride ◽  
Photocatalytic Decomposition ◽  
E Coli ◽  
Visible Light Photocatalytic

A noval ternary nanocomposite AgCl/Ag3PO4/g-C3N4 was successfully synthesized for photocatalytic degradation of methylene blue, methylparaben and inactivation of E. coli under visible light irradiation, showing excellent photocatalytic degradation performance and stability.

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