Photocatalytic Degradation of Methylene Blue and Methyl Orange with Fe-Doped ZnO Nanoparticles Modified with Natural Zeolite and Montmorillonite: Comparative Study

2015 ◽  
Vol 1123 ◽  
pp. 295-302 ◽  
Author(s):  
Nur Afifah ◽  
Siti Adriani ◽  
Nadia Febiana Djaja ◽  
Rosari Saleh
Keyword(s):  
Methylene Blue ◽  
Methyl Orange ◽  
Natural Zeolite ◽  
Organic Dyes ◽  
Uv Light ◽  
Precipitation Method ◽  
Resonance Spectroscopy ◽  
X Ray ◽  
Doped Zno ◽  
Co Precipitation

The present study compares the photocatalytic decolorization ability of Fe-doped ZnO modified both natural zeolite and montmorillonite towards aqueous solution of organic dyes such as methylene blue and methyl orange under UV light irradiation. Both photocatalysts were synthesized using co-precipitation method and characterized by X-ray diffraction, energy dispersive X-ray, Fourier-transform infrared absorption, and electron spin resonance spectroscopy. The results showed that the photocatalytic efficiency is better in the presence of montmorillonite compared to natural zeolite.

Photocatalytic Activity of Fe-Doped ZnO/Montmorillonite Nanocomposite for Degradation of Malachite Green

2015 ◽  
Vol 827 ◽  
pp. 19-24 ◽  
Author(s):  
Nur Afifah ◽  
Nadia Febiana Djaja ◽  
Rosari Saleh
Keyword(s):  
Photocatalytic Activity ◽  
Malachite Green ◽  
Organic Dyes ◽  
Uv Light ◽  
Precipitation Method ◽  
X Ray Diffraction ◽  
X Ray ◽  
Spin Resonance ◽  
Doped Zno ◽  
Co Precipitation

In this study, the photocatalytic activity of pure Fe- doped ZnO and Fe- doped ZnO/Montmorillonite nanocomposite has been investigated for the degradation of malachite green under UV light irradiation. Both photocatalysts were synthesized using co-precipitation method and characterized by X-ray diffraction, energy dispersive X-ray spectroscopy, Fourier-transform infrared absorption, and electron spin resonance. The results showed that the photocatalytic efficiency is better in the presence of montmorillonite compared to pure Fe- doped ZnO. To detect the possible reactive species involved in degradation of organic dyes control experiments with introducing scavengers into the solution of organic dyes were carried out. It is found that electron plays an important role in the degradation of malachite green.

The Influence of Montmorillonite Incorporation in Mn-Doped ZnO Nanoparticles for Photocatalytic Degradation of Organic Dyes

2015 ◽  
Vol 1112 ◽  
pp. 194-200
Author(s):  
Nadia Febiana Djaja ◽  
Rosari Saleh
Keyword(s):  
Zno Nanoparticles ◽  
Diffuse Reflectance Spectroscopy ◽  
Organic Dyes ◽  
Uv Light ◽  
Precipitation Method ◽  
X Ray Diffraction ◽  
X Ray ◽  
Doped Zno ◽  
Co Precipitation ◽  
Mn Doped

The present study compares the photocatalytic decolorization ability of bare Mn-doped ZnO and montmorillonite modified Mn-doped ZnO nanoparticles towards aqueous solution of organic dyes (methylene blue and malachite green) under UV light irradiation. Both photocatalysts were synthesized using co-precipitation method and characterized by X-ray diffraction, energy dispersive X-ray spectroscopy, Fourier-transform infrared absorption, electron spin resonance, and diffuse reflectance spectroscopy. Comparison of degradation efficiency demonstrated that montmorillonite modified Mn-doped ZnO nanoparticles exhibited higher activity than bare Mn-doped ZnO nanoparticles.

Transition Metal (Ni, Cr)-Doped ZnO Assisted CTAB Performance on Decolorization of Organic Dyes

2015 ◽  
Vol 1123 ◽  
pp. 289-294
Author(s):  
Annisa Noorhidayati ◽  
Raynaldi Philipus ◽  
Mia Putri Rachmawati ◽  
Rosari Saleh
Keyword(s):  
Transition Metal ◽  
Zno Nanoparticles ◽  
Organic Dyes ◽  
Uv Light ◽  
Precipitation Method ◽  
Ammonium Bromide ◽  
X Ray ◽  
Bet Method ◽  
Doped Zno ◽  
Co Precipitation

A series of semiconductor nanophotocatalyst based on transition metal (Ni and Cr) doped ZnO nanoparticles have been synthesized in the presence of cetril methyl ammonium bromide (CTAB) by co-precipitation method. Samples were characterized by X-Ray Diffraction (XRD), Energy Dispersive X-Ray (EDX), Field Emission Scanning Electron Microscope (FESEM), and Brunauer-Emmet-Teller (BET) method. The resulting materials were explored for the decolorization of 4 different organic dyes (methyl orange, methylene blue, malachite green, and congo red) under UV light irradiation. The resulting materials exhibited relatively higher photocatalytic decolorization than bare Ni- and Cr-doped ZnO nanoparticles with similar doping concentration

Photocatalytic Activity of Zeolite Supported Transition Metal-(Co2+ and Cr2+) Doped ZnO: Comparative Study

2015 ◽  
Vol 827 ◽  
pp. 43-48
Author(s):  
Annisa Noorhidayati ◽  
Mia Putri Rahmawati ◽  
Nadia Febiana Djaja ◽  
Rosari Saleh
Keyword(s):  
Transition Metal ◽  
Zno Nanoparticles ◽  
Diffuse Reflectance Spectroscopy ◽  
Uv Light ◽  
Transition Metal Ions ◽  
Precipitation Method ◽  
X Ray Diffraction ◽  
X Ray ◽  
Doped Zno ◽  
Co Precipitation

Transition metal ions (Co and Cr) doped ZnO nanoparticles supported on natural zeolite were synthesized using co-precipitation method. The synthesized samples were characterized by means of X-ray diffraction, energy dispersive X-ray, Fourier-transform infrared absorption, and UV-visible diffuse reflectance spectroscopy. The samples were further used as photocatalyst for degradation of methyl orange and methylene blue in aqueous solutions under UV light irradiation. The results showed that zeolite supported Cr-doped ZnO nanoparticles is more efficient compared with zeolite supported Co-doped ZnO nanoparticles. It is also revealed that zeolite supported samples possessed higher photocatalytic efficiency compared to bare samples.

Montmorillonite Incorporated in Cr Doped ZnO Nanoparticles for Degradation of Organic Dyes in Water under UV Light Irradiation

2015 ◽  
Vol 1123 ◽  
pp. 316-321 ◽  
Author(s):  
Vici Tritella Carmida ◽  
Mia Putri Rahmawati ◽  
Nadia Febiana Djaja ◽  
Rosari Saleh
Keyword(s):  
Methylene Blue ◽  
Zno Nanoparticles ◽  
Congo Red ◽  
Organic Dyes ◽  
Uv Light ◽  
Organic Pollutant ◽  
Light Irradiation ◽  
Precipitation Method ◽  
Uv Light Irradiation ◽  
Doped Zno

In this study, the photocatalytic degradation of methylene blue and congo red has been investigated using montmorillonite modified Cr-doped ZnO nanoparticles. Chromium doped zinc oxide nanoparticles were synthesized by co-precipitation method and were characterized using X-ray diffraction, Fourier-transform infrared absorption and UV-visible spectrophotometer. Furthermore these nanoparticles were explored to degradation of methylene blue and congo red in aqueous solution as model of organic pollutant under UV light irradiation. Comparison of degradation efficiency demonstrated that Cr-doped ZnO nanoparticles modified montmorillonite exhibited higher activity than pure Cr-doped ZnO.

Physical Properties and Photocatalytic Activity of Fe- and Co-Doped ZnO Nanoparticles Synthesized via Surfactant Modified Co-Precipitation

2015 ◽  
Vol 1123 ◽  
pp. 241-246 ◽  
Author(s):  
Annisa Noorhidayati ◽  
Siti Adriani ◽  
Rosari Saleh
Keyword(s):  
Photocatalytic Activity ◽  
Diffuse Reflectance Spectroscopy ◽  
Uv Light ◽  
Sodium Dodecyl ◽  
Precipitation Method ◽  
Resonance Spectroscopy ◽  
Dopant Atom ◽  
Doped Zno ◽  
Co Precipitation ◽  
Co Doped

Fe- and Co-doped ZnO with various doping concentrations have been synthesized by co-precipitation method in the presence of sodium dodecyl sulfate as anionic surfactant. The obtained sample powders were characterized by X-ray diffraction, Fourier transform infrared absorption, UV-visible diffuse reflectance spectroscopy, electron spin resonance spectroscopy and Brunauer-Emmet-Teller (BET) method. The photocatalytic activity was evaluated by observing the decolorization of methylene blue under UV light irradiation. The results revealed that the addition of a dopant atom significantly enhanced the photocatalytic activity.

Natural Zeolite Incorporated in Zinc Oxide Nanoparticles Doped with Manganese for Degradation of Organic Dye in Water under UV Light Irradiation

2014 ◽  
Vol 911 ◽  
pp. 120-125 ◽  
Author(s):  
Randi Azmi ◽  
Nadia Febiana Djaja ◽  
Rosari Saleh
Keyword(s):  
Natural Zeolite ◽  
Zinc Oxide Nanoparticles ◽  
Uv Light ◽  
Method Comparison ◽  
Organic Dye ◽  
Precipitation Method ◽  
Uv Light Irradiation ◽  
Doped Zno ◽  
Co Precipitation ◽  
Mn Doped

In this study, the photocatalytic degradation of methylene blue has been investigated using natural zeolite modified Mn-doped ZnO nanoparticles synthesized by co-precipitation method. Comparison of degradation efficiency demonstrated that natural zeolite modifiedMn-doped ZnO exhibited higher activity than bare Mn-doped ZnO.

Comparative Study of Photocatalytic Activity of Ni-Doped ZnO and Zeolite Supported Ni-Doped ZnO Prepared by Co-Precipitation Method

2015 ◽  
Vol 827 ◽  
pp. 25-30
Author(s):  
Raynaldi Philipus ◽  
Annisa Noorhidayati ◽  
Nadia Febiana Djaja ◽  
Rosari Saleh
Keyword(s):  
Methylene Blue ◽  
Photocatalytic Activity ◽  
Zno Nanoparticles ◽  
Uv Light ◽  
Active Species ◽  
Precipitation Method ◽  
Doped Zno ◽  
Co Precipitation ◽  
Supported Ni ◽  
Better Than

The present study compares the photocatalytic degradation of methylene blue in the presence of natural zeolite supported Ni-doped ZnO and bare Ni-doped ZnO nanoparticles. The photocatalyst was prepared by co-precipitation method and the photocatalytic activity of the photocatalyst was investigated under UV light irradiation. The results showed that the photocatalytic efficiency of zeolite supported Ni-doped ZnO nanoparticles is better than that of bare Ni-doped ZnO nanoparticles. The influence of experimental parameters on the photodegradation of methylene blue was studied and it was observed that photocatalytic activity varied with pH, initial methylene blue concentration and the amount of photocatalyst. The scavenger technique shows that electron plays an important role in the bare Ni-doped ZnO, while in zeolite supported Ni-doped ZnO,●OH is the prominent active species.

scholarly journals Zirconium-Doped Chromium IV Oxide Nanocomposites: Synthesis, Characterization, and Photocatalysis towards the Degradation of Organic Dyes

Catalysts ◽  
2021 ◽  
Vol 11 (1) ◽  
pp. 117
Author(s):  
Zahir Muhammad ◽  
Farman Ali ◽  
Muhammad Sajjad ◽  
Nisar Ali ◽  
Muhammad Bilal ◽  
...  
Keyword(s):  
Methylene Blue ◽  
Photocatalytic Activity ◽  
Methyl Orange ◽  
Solid State ◽  
Room Temperature ◽  
Organic Dyes ◽  
Uv Light ◽  
Heterogeneous Photocatalysis ◽  
Ft Ir ◽  
Complete Mineralization

Degradation of organic dyes and their byproducts by heterogeneous photocatalysts is an essential process, as these dyes can be potentially discharged in wastewater and threaten aquatic and xerophyte life. Therefore, their complete mineralization into nontoxic components (water and salt) is necessary through the process of heterogeneous photocatalysis. In this study, Zr/CrO2 (Zirconium-doped chromium IV oxide) nanocomposite-based photocatalysts with different compositions (1, 3, 5, 7 & 9 wt.%) were prepared by an environmentally friendly, solid-state reaction at room temperature. The as-prepared samples were calcined under air at 450 °C in a furnace for a specific period of time. The synthesis of Zr/CrO2 photocatalysts was confirmed by various techniques, including XRD, SEM, EDX, FT-IR, UV-Vis, and BET. The photocatalytic properties of all samples were tested towards the degradation of methylene blue and methyl orange organic dyes under UV light. The results revealed a concentration-dependent photocatalytic activity of photocatalysts, which increased the amount of dopant (up to 5 wt.%). However, the degradation efficiency of the catalysts decreased upon further increasing the amount of dopant due to the recombination of holes and photoexcited electrons.

scholarly journals Influence of Cu(NO3)2 content used in thermal shock method on the photocatalytic activity of Cu-Modified ZnO nanoparticles

2021 ◽  
Vol 5 (3) ◽  
pp. first
Author(s):  
Thế Luân Nguyễn ◽  
Tiến Khoa Lê ◽  
Châu Ngọc Hoàng ◽  
Hữu Khánh Hưng Nguyễn ◽  
Thị Kiều Xuân Huỳnh
Keyword(s):  
Crystal Structure ◽  
Methylene Blue ◽  
Photocatalytic Activity ◽  
Thermal Shock ◽  
Photoelectron Spectroscopy ◽  
Copper Content ◽  
Uv Light ◽  
Copper Nitrate ◽  
X Ray ◽  
Doped Zno

The Cu doped ZnO photocatalysts were prepared on ZnO substrate modified with copper nitrate by thermal shock method with different ratio % molar Cu : Zn = 0.3, 0.5, 1.0, 2.0 and 5.0 in order to study the impacts of copper content on the photocatalytic activity of ZnO under both UV and Vis light irradiation. The crystal structure, morphology bulk and surface were investigated by X-ray diffraction (XRD), transmission electron microscopy (TEM), fourier transform infrared spectroscopy (FTIR) and X-ray photoelectron spectroscopy (XPS). Their photocatalytic activities were studied via time-dependent degradation of methylene blue in aqueous solution. The results exhibit that crystal structure and morphology of Cu doped ZnO photocatalysts is not modified significally than ZnO original but surface charateristicschanged greatly. The photocatalyst was doped with copper content under 2% showed formation of Cu species. These samples perform photocatalytic activity higher than ZnO. The CuNZO-0.05-500 had the highest rate constants for methylene blue degradation (kUV = 6,901 h-1, kVIS = 0,224 h-1), which are about 2.2 times and 1.3 times higher than unmodified ZnO under UV light and Vis light, respectively. However, the CuNZO-5.0-500 which had the formation of CuO phase and unchangeable ZnO's surface has photocatalytic activity similar to pure ZnO.

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