Methyl orange | An-Najah Staff

Optimizing photo-mineralization of aqueousر methyl orange by nano-ZnO catalyst under simulated natural conditions

Mon, 2015-10-26 16:26 — Amani Lutfi Zubi

Journal Title, Volume, Page:

Iranian Journal of Environmental Health Science & Engineering

Year of Publication:

2015

Link:

http://jehse.biomedcentral.com/articles/10.1186/s40201-015-0204-0

Authors:

Hikmat S. Hilal

Ahed H. Zyoud

Amani Zu’bi

Muath H. S. Helal

DaeHoon Park

Guy Campet

Preferred Abstract (Original):

Background: Photo-degradation of organic contaminants into non-hazardous mineral compounds is emerging as

a strategy to purify water and environment. Tremendous research is being done using direct solar light for these

purposes. In this paper we report on optimum conditions for complete mineralization of aqueous methyl orange

using lab-prepared ZnO nanopowder catalyst under simulated solar light.

Results: Nano-scale ZnO powder was prepared in the lab by standard methods, and then characterized using electronic

absorption spectra, photolumenscence emission (PL) spectra, XRD, and SEM. The powder involved a wurtzite structure

with ~19 nm particles living in agglomerates. Photo-degradation progressed faster under neutral or slightly acidic

conditions which resemble natural waters. Increasing catalyst concentration increased photodegradation rate to a certain

limit. Values of catalyst turn over number and degradation percentage increased under higher light intensity, whereas the

quantum yield values decreased. The photocatalytic efficiency of nano-ZnO powders in methyl orange photodegradation

in water with solar light has been affected by changing the working conditions. More importantly, the process may be

used under natural water conditions with pH normally less than 7, with no need to use high concentrations of catalyst or

contaminant. The results also highlight the negative impact of possible high concentrations of CO2 on water purification

processes. Effects of other added gaseous flows to the reaction mixture are also discussed.

Conclusion: ZnO nano-particles are useful catalyst for complete mineralization of organic contaminants in water.

Photo-degradation of organic contaminants with ZnO nano-particles, methyl orange being an example, should

be considered for future large scale water purification processes under natural conditions

Optimizing photo-mineralization of aqueous methyl orange by nano-ZnO catalyst under simulated natural conditions

Sat, 2015-05-23 14:45 — Hikmat S. Hilal, D.Sc.

Journal Title, Volume, Page:

Journal of Environmental Health Science and Engineering

Year of Publication:

2015

Link:

http://dx.doi.org/10.1186/s40201-015-0204-0

Authors:

Ahed Zyoud

An-Najah National University

Current Affiliation:

An-Najah National University

[email protected]

Amani Zu’bi

An-Najah National University

Current Affiliation:

An-Najah National University

[email protected]

Muath H S Hilal

University of Saskatchewan

Current Affiliation:

University of Saskatchewan

[email protected]

DaeHoon Park

Dansuk Company, Korea

Current Affiliation:

Dansuk Company, Korea

[email protected]

Guy Campet

ICMCB

Current Affiliation:

ICMCB

[email protected]

Hikmat S. Hilal

An-Najah National University

Current Affiliation:

An-Najah National University

[email protected]

Preferred Abstract (Original):

Nano-scale ZnO powder was prepared in the lab by standard methods, and then characterized

using electronic absorption spectra, photolumenscence emission (PL) spectra, XRD, and

SEM. The powder involved a wurtzite structure with ~19 nm particles living in agglomerates.

Photo-degradation progressed faster under neutral or slightly acidic conditions which

resemble natural waters. Increasing catalyst concentration increased photodegradation rate to

a certain limit. Values of catalyst turn over number and degradation percentage increased

under higher light intensity, whereas the quantum yield values decreased. The photocatalytic

efficiency of nano-ZnO powders in methyl orange photodegradation in water with solar light

has been affected by changing the working conditions. More importantly, the process may be

used under natural water conditions with pH normally less than 7, with no need to use high

concentrations of catalyst or contaminant. The results also highlight the negative impact of

possible high concentrations of CO

on water purification processes. Effects of other added

gaseous flows to the reaction mixture are also discussed.

ZnO nano-particles are useful catalyst for complete mineralization of organic contaminants in

water. Photo-degradation of organic contaminants with ZnO nano-particles, methyl orange

being an example, should be considered for future large scale water purification processes

under natural conditions.

Alternative Natural Dyes in Water Purification: Anthocyanin as Tio2-Sensitizer in Methyl Orange ‎Photo-Degradation

Tue, 2014-03-04 11:41 — Iyad SAADEDDIN

Journal Title, Volume, Page:

Solid State Sciences, 13, (2011) 1268-1275

Year of Publication:

2011

Link:

http://www.sciencedirect.com/science/article/pii/S1293255811001051

Authors:

Iyad Saadeddin

Semiconductor & Solar Energy Research Laboratory (SSERL), Department of Chemistry, An-Najah N. University, PO Box 7, Nablus, Palestine

Current Affiliation:

Department of Physics, Faculty of Science, An-Najah National University, Palestine

[email protected]

Nidal Zaatar

Semiconductor & Solar Energy Research Laboratory (SSERL), Department of Chemistry, An-Najah N. University, PO Box 7, Nablus, Palestine

Ahed Zyoud

Semiconductor & Solar Energy Research Laboratory (SSERL), Department of Chemistry, An-Najah N. University, PO Box 7, Nablus, Palestine

Muath H. Helal

Semiconductor & Solar Energy Research Laboratory (SSERL), Department of Chemistry, An-Najah N. University, PO Box 7, Nablus, Palestine

Guy Campet

Institut de Chimie de la Matière Condensée de Bordeaux (ICMCB), 87 Avenue du Dr. A Schweitzer, 33608 Pessac, France

Moulki Hakim

Institut de Chimie de la Matière Condensée de Bordeaux (ICMCB), 87 Avenue du Dr. A Schweitzer, 33608 Pessac, France

DaeHoon Park

R&D Center, Dansuk Industrial Co., Ltd., #1239-5, Jeongwang-Dong, Shiheung-Si, Kyonggi-Do, South Korea

Hikmat S. Hilal

Semiconductor & Solar Energy Research Laboratory (SSERL), Department of Chemistry, An-Najah N. University, PO Box 7, Nablus, West Bank, Palestine

Preferred Abstract (Original):

Natural molecular dye, anthocyanin, is described here as safe sensitizer for TiO₂ particles in photo-degradation of organic contaminants in water. The dye is a promising replacement for the more costly and hazardous heavy metal based systems, such as CdS particles and Ru-compounds. TiO₂/anthocyanin effectively catalyzed the photo-degradation of methyl orange contaminant under solar simulator radiation. The new TiO₂/anthocyanin catalyst showed comparable efficiency to earlier systems, while avoiding their hazardous nature. When supported onto activated carbon (AC) particles, the resulting AC/TiO₂/anthocyanin system showed enhanced efficiency and ease of recovery from the catalytic reaction mixture. The natural dye molecules showed the tendency to degrade under photo-degradation conditions, just like earlier hazardous sensitizers. However, complete mineralization of anthocyanin occurred leaving no traces of organic species in solution. Sensitizer degradation caused deactivation of the supported catalyst on recovery. Such a shortcoming was overcome by re-treatment of the recovered catalysts with fresh dye.

Effects of different reaction parameters on the catalyst efficiency were studied. A mechanism, similar to earlier CdS-sensitized catalyst systems, is proposed for the TiO₂/anthocyanin catalyst.

Alternative natural dyes in water purification: Anthocyanin as TiO2-sensitizer in methyl orange photo-degradation

Fri, 2013-03-01 22:55 — Nidal Zatar

Journal Title, Volume, Page:

Solid State Sciences, 13, (2011) 1268-1275

Year of Publication:

2011

Link:

http://www.sciencedirect.com/science/article/pii/S1293255811001051

Authors:

Nidal Zaatar

Semiconductor & Solar Energy Research Laboratory (SSERL), Department of Chemistry, An-Najah N. University, PO Box 7, Nablus, West Bank, Palestine

Current Affiliation:

Semiconductor & Solar Energy Research Laboratory (SSERL), Department of Chemistry, An-Najah N. University, PO Box 7, Nablus, West Bank, Palestine

[email protected]

Ahed Zyoud

Semiconductor & Solar Energy Research Laboratory (SSERL), Department of Chemistry, An-Najah N. University, PO Box 7, Nablus, West Bank, Palestine

Iyad Saadeddin

Semiconductor & Solar Energy Research Laboratory (SSERL), Department of Chemistry, An-Najah N. University, PO Box 7, Nablus, West Bank, Palestine

Muath H. Helal

Semiconductor & Solar Energy Research Laboratory (SSERL), Department of Chemistry, An-Najah N. University, PO Box 7, Nablus, West Bank, Palestine

Guy Campet

Institut de Chimie de la Matière Condensée de Bordeaux (ICMCB), 87 Avenue du Dr. A Schweitzer, 33608 Pessac, France

Moulki Hakim

Institut de Chimie de la Matière Condensée de Bordeaux (ICMCB), 87 Avenue du Dr. A Schweitzer, 33608 Pessac, France

DaeHoon Park

R&D Center, Dansuk Industrial Co., Ltd., #1239-5, Jeongwang-Dong, Shiheung-Si, Kyonggi-Do, South Korea

Hikmat S. Hilal

Semiconductor & Solar Energy Research Laboratory (SSERL), Department of Chemistry, An-Najah N. University, PO Box 7, Nablus, West Bank, Palestine

Preferred Abstract (Original):

Natural molecular dye, anthocyanin, is described here as safe sensitizer for TiO₂ particles in photo-degradation of organic contaminants in water. The dye is a promising replacement for the more costly and hazardous heavy metal based systems, such as CdS particles and Ru-compounds. TiO₂/anthocyanin effectively catalyzed the photo-degradation of methyl orange contaminant under solar simulator radiation. The new TiO₂/anthocyanin catalyst showed comparable efficiency to earlier systems, while avoiding their hazardous nature. When supported onto activated carbon (AC) particles, the resulting AC/TiO₂/anthocyanin system showed enhanced efficiency and ease of recovery from the catalytic reaction mixture. The natural dye molecules showed the tendency to degrade under photo-degradation conditions, just like earlier hazardous sensitizers. However, complete mineralization of anthocyanin occurred leaving no traces of organic species in solution. Sensitizer degradation caused deactivation of the supported catalyst on recovery. Such a shortcoming was overcome by re-treatment of the recovered catalysts with fresh dye.

Effects of different reaction parameters on the catalyst efficiency were studied. A mechanism, similar to earlier CdS-sensitized catalyst systems, is proposed for the TiO₂/anthocyanin catalyst.

Alternative Natural Dyes in Water Purification: Anthocyanin as TiO2-Sensitizer in Methyl Orange Photo-Degradation

Sat, 2011-03-26 20:15 — Hikmat S. Hilal, D.Sc.

Journal Title, Volume, Page:

Solid State Sciences Volume 13, Issue 6, June 2011, Pages 1268-1275

Year of Publication:

2011

Link:

http://www.sciencedirect.com/science/article/pii/S1293255811001051

Authors:

Hikmat S. Hilal

Semiconductor & Solar Energy Research Laboratory (SSERL), Department of Chemistry, An-Najah N. University, PO Box 7, Nablus, West Bank, Palestine

Current Affiliation:

Department of Chemistry, An-Najah N. University, Nablus, PO Box 7, West Bank, Palestine

[email protected]

Ahed Zyoud

Semiconductor & Solar Energy Research Laboratory (SSERL), Department of Chemistry, An-Najah N. University, PO Box 7, Nablus, West Bank, Palestine

Iyad Saadeddin

Semiconductor & Solar Energy Research Laboratory (SSERL), Department of Chemistry, An-Najah N. University, PO Box 7, Nablus, West Bank, Palestine

Muath Helal

College of Pharmacy,

DaeHoon Park

R&D Center, Dansuk Industrial Co., Ltd., #1239-5, Jeongwang-Dong, Shiheung-Si, Kyonggi-Do, South Korea

Hakim Moulki

Institut de Chimie de la Matière Condensée de Bordeaux (ICMCB), 87 Avenue du Dr. A Schweitzer, 33608 Pessac, France

Nidal Zaatar

Semiconductor & Solar Energy Research Laboratory (SSERL), Department of Chemistry, An-Najah N. University, PO Box 7, Nablus, West Bank, Palestine

Guy Campet

Institut de Chimie de la Matière Condensée de Bordeaux (ICMCB), 87 Avenue du Dr. A Schweitzer, 33608 Pessac, France

Preferred Abstract (Original):

Natural molecular dye, anthocyanin, is described here as safe sensitizer for TiO₂ particles in photo-degradation of organic contaminants in water. The dye is a promising replacement for the more costly and hazardous heavy metal based systems, such as CdS particles and Ru-compounds. TiO₂/anthocyanin effectively catalyzed the photo-degradation of methyl orange contaminant under solar simulator radiation. The new TiO₂/anthocyanin catalyst showed comparable efficiency to earlier systems, while avoiding their hazardous nature. When supported onto activated carbon (AC) particles, the resulting AC/TiO₂/anthocyanin system showed enhanced efficiency and ease of recovery from the catalytic reaction mixture. The natural dye molecules showed the tendency to degrade under photo-degradation conditions, just like earlier hazardous sensitizers. However, complete mineralization of anthocyanin occurred leaving no traces of organic species in solution. Sensitizer degradation caused deactivation of the supported catalyst on recovery. Such a shortcoming was overcome by re-treatment of the recovered catalysts with fresh dye.

Effects of different reaction parameters on the catalyst efficiency were studied. A mechanism, similar to earlier CdS-sensitized catalyst systems, is proposed for the TiO₂/anthocyanin catalyst.

Alternative Natural Dyes in Water Purification: Anthocyanin as Tio2-Sensitizer in Methyl Orange Photo-Degradation

Sat, 2011-02-05 19:19 — Ahed Husni Abdel Razaq Zyoud

Journal Title, Volume, Page:

Solid State Sciences, Volume 13, Issue 6, June 2011, Pages 1268-1275

Year of Publication:

2011

Link:

http://www.sciencedirect.com/science/article/pii/S1293255811001051

Authors:

Ahed H. Zyoud

Semiconductor & Solar Energy Research Laboratory (SSERL), Department of Chemistry, An-Najah N. University, PO Box 7, Nablus, Palestine

Current Affiliation:

Department of Chemistry, An-Najah National University, Nablus, Palestine

[email protected]

Nidal Zaatar

Semiconductor & Solar Energy Research Laboratory (SSERL), Department of Chemistry, An-Najah N. University, PO Box 7, Nablus, Palestine

Iyad Saadeddin

Semiconductor & Solar Energy Research Laboratory (SSERL), Department of Chemistry, An-Najah N. University, PO Box 7, Nablus, Palestine

Muath H. Helal

Semiconductor & Solar Energy Research Laboratory (SSERL), Department of Chemistry, An-Najah N. University, PO Box 7, Nablus, Palestine

Guy Campet

Institut de Chimie de la Matière Condensée de Bordeaux (ICMCB), 87 Avenue du Dr. A Schweitzer, 33608 Pessac, France

Moulki Hakim

Institut de Chimie de la Matière Condensée de Bordeaux (ICMCB), 87 Avenue du Dr. A Schweitzer, 33608 Pessac, France

DaeHoon Park

R&D Center, Dansuk Industrial Co., Ltd., #1239-5, Jeongwang-Dong, Shiheung-Si, Kyonggi-Do, South Korea

Hikmat S. Hilal

Semiconductor & Solar Energy Research Laboratory (SSERL), Department of Chemistry, An-Najah N. University, PO Box 7, Nablus, Palestine

[email protected]

Preferred Abstract (Original):

Natural molecular dye, anthocyanin, is described here as safe sensitizer for TiO₂ particles in photo-degradation of organic contaminants in water. The dye is a promising replacement for the more costly and hazardous heavy metal based systems, such as CdS particles and Ru-compounds. TiO₂/anthocyanin effectively catalyzed the photo-degradation of methyl orange contaminant under solar simulator radiation. The new TiO₂/anthocyanin catalyst showed comparable efficiency to earlier systems, while avoiding their hazardous nature. When supported onto activated carbon (AC) particles, the resulting AC/TiO₂/anthocyanin system showed enhanced efficiency and ease of recovery from the catalytic reaction mixture. The natural dye molecules showed the tendency to degrade under photo-degradation conditions, just like earlier hazardous sensitizers. However, complete mineralization of anthocyanin occurred leaving no traces of organic species in solution. Sensitizer degradation caused deactivation of the supported catalyst on recovery. Such a shortcoming was overcome by re-treatment of the recovered catalysts with fresh dye.

Effects of different reaction parameters on the catalyst efficiency were studied. A mechanism, similar to earlier CdS-sensitized catalyst systems, is proposed for the TiO₂/anthocyanin catalyst.