Photocatalytic Synthesis of Urea from in situ Generated Ammonia and Carbon Dioxide

被引：24

作者：

Srinivas, Basavaraju ^{[1
]}

Kumari, Valluri Durga ^{[1
]}

Sadanandam, Gullapelli ^{[1
]}

Hymavathi, Chilumula ^{[1
]}

Subrahmanyam, Machiraju ^{[1
]}

De, Bhudev Ranjan ^{[2
]}

机构：

[1] Indian Inst Chem Technol, Inorgan & Phys Chem Div, Hyderabad 500007, Andhra Pradesh, India

[2] Vidyasagar Univ, Dept Chem & Chem Technol, Midnapore, W Bengal, India

来源：

PHOTOCHEMISTRY AND PHOTOBIOLOGY | 2012年 / 88卷 / 02期

关键词：

NITRATE IONS; CATALYTIC-REDUCTION; DRINKING-WATER; NITRITE IONS; TIO2; PHOTOSYNTHESIS; NITROGEN;

D O I：

10.1111/j.1751-1097.2011.01037.x

中图分类号：

Q5 [生物化学]; Q7 [分子生物学];

学科分类号：

071010 ; 081704 ;

摘要：

TiO2 and Fe-titanate (different wt%) supported on zeolite were prepared by sol-gel and solid-state dispersion methods. The photocatalysts prepared were characterized by X-ray diffraction, scanning electron microscopy and ultraviolet (UV)visible diffuse reflectance spectroscopy techniques. Photocatalytic reduction of nitrate in water and isopropanol/oxalic acid as hole scavengers are investigated in a batch reactor under UV illumination. The yield of urea increased notably when the catalysts were supported on zeolite. The Fe-titanate supported catalyst promotes the charge separation that contributes to an increase in selective formation of urea. The product formation is because of the high adsorption of in situ generated CO2 and NH3 over shape-selective property of the zeolite in the composite photocatalyst. The maximum yield of urea is found to be 18 ppm while 1% isopropanol containing solution over 10 wt% Fe-titanate/HZSM-5 photocatalyst was used.

引用

页码：233 / 241

页数：9

共 28 条

[1] Catalytic removal of nitrates from waters [J].

Constantinou, Costas L. ;

Costa, Costas N. ;

Efstathiou, Angelos M. .

CATALYSIS TODAY, 2010, 151 (1-2) :190-194

[2] An easy and efficient use of TiO2 supported HZSM-5 and TiO2+HZSM-5 zeolite combinate in the photodegradation of aqueous phenol and p-chlorophenol [J].

Durgakumari, V ;

Subrahmanyam, M ;

Rao, KVS ;

Ratnamala, A ;

Noorjahan, M ;

Tanaka, K .

APPLIED CATALYSIS A-GENERAL, 2002, 234 (1-2) :155-165

[3] Catalytic reduction of nitrite ions in drinking water over Pd-Cu/TiO2 bimetallic catalyst [J].

Gao, WL ;

Chen, JX ;

Guan, XX ;

Jin, RC ;

Zhang, FX ;

Guan, NJ .

CATALYSIS TODAY, 2004, 93-5 :333-339

[4] Titania-supported bimetallic catalysts for photocatalytic reduction of nitrate [J].

Gao, WL ;

Jin, RC ;

Chen, MX ;

Guan, XX ;

Zeng, HS ;

Zhang, FX ;

Guan, NJ .

CATALYSIS TODAY, 2004, 90 (3-4) :331-336

[5] Reduction of nitrate and nitrite ions over Ni-ZnS photocatalyst under visible light irradiation in the presence of a sacrificial reagent [J].

Hamanoi, O ;

Kudo, A .

CHEMISTRY LETTERS, 2002, (08) :838-839

[6] Photocatalytic reduction of nitrate ion in drinking water by using metal-loaded MgTiO3-TiO2 composite semiconductor catalyst [J].

Jin, RC ;

Gao, WL ;

Chen, JX ;

Zeng, HS ;

Zhang, FX ;

Liu, ZG ;

Guan, NJ .

JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY, 2004, 162 (2-3) :585-590

[7] Effective photocatalytic reduction of nitrate to ammonia in an aqueous suspension of metal-loaded titanium(IV) oxide particles in the presence of oxalic acid [J].

Kominami, H ;

Furusho, A ;

Murakami, S ;

Inoue, H ;

Kera, Y ;

Ohtani, B .

CATALYSIS LETTERS, 2001, 76 (1-2) :31-34

[8] Urea photosynthesis from inorganic carbon and nitrogen compounds using TiO2 as photocatalyst [J].

Kuwabata, S ;

Yamauchi, H ;

Yoneyama, H .

LANGMUIR, 1998, 14 (07) :1899-1904

[9] Photocatalytic reduction of nitrate ions on TiO2 by oxalic acid [J].

Li, YX ;

Wasgestian, F .

JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY, 1998, 112 (2-3) :255-259

[10] Structure-Activity Relationship of Iron Titanate Catalysts in the Selective Catalytic Reduction of NOx with NH3 [J].

Liu, Fudong ;

He, Hong .

JOURNAL OF PHYSICAL CHEMISTRY C, 2010, 114 (40) :16929-16936

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