scholarly journals Elemental Mercury Removal over CeO2/TiO2 Catalyst Prepared by Sol–Gel Method

2020 ◽  
Vol 10 (8) ◽  
pp. 2706
Author(s):  
Qiang Lv ◽  
Chang’an Wang ◽  
Yang He ◽  
Ming Cai ◽  
Defu Che
Keyword(s):  
Flue Gas ◽  
High Efficiency ◽  
Sol Gel ◽  
Synergetic Effect ◽  
Elemental Mercury ◽  
Simultaneous Removal ◽  
Impregnation Method ◽  
Performance Tests ◽  
Gel Method ◽  
Sol Gel Method

Elemental mercury (Hg0) emitted from a coal-fired boiler is a serious menace and challenge to humans. Using high-efficiency CeO2/TiO2 catalysts to enhance the conversion from elemental mercury to oxidized mercury is a promising approach to reducing Hg0 emission. However, most of the CeO2/TiO2 catalysts were prepared by impregnation method or coprecipitation method while little attention has been paid to sol–gel method, which has many advantages in material production. In this study, a series of catalysts were synthesized through the sol–gel method to remove the gaseous Hg0 from simulated flue gas. The effect of vanadium (V) on Hg0 removal efficiency and the simultaneous removal of Hg0 and NO were also investigated. The results showed the optimal temperature for Hg0 removal over the CeO2/TiO2 catalysts was 350 °C. The oxidation of Hg0 could be promoted by O2, HCl, and NO, but inhibited by NH3 and SO2. The addition of vanadium could enhance the Hg0 removal performance and the resistance to NH3 and SO2. A synergetic effect was found during the simultaneous removal of Hg0 and NO. The high redox reaction reactivity of Ce4+/Ce3+ and V5+/V4+ should take the credit for the oxidation of Hg0 and the removal of NO. Based upon the performance tests and the characterization experiments of the samples, the detailed mechanisms of the Hg0 and NO removal over the catalysts were proposed.

Influence of Preparation Methods of TiO2 Nano-Particle on Photodegradation of Methylene Blue

2020 ◽  
Vol 998 ◽  
pp. 84-89
Author(s):  
Jittinat Sirichokthanasarp ◽  
Dang Trung Tri Trinh ◽  
Du Ang Dao Channei ◽  
Kantapat Chansaenpak ◽  
Wilawan Khanitchaidecha ◽  
...  
Keyword(s):  
Methylene Blue ◽  
Hydrothermal Method ◽  
Organic Compounds ◽  
High Efficiency ◽  
Anatase Phase ◽  
Sol Gel ◽  
Nano Particles ◽  
Preparation Methods ◽  
Gel Method ◽  
Sol Gel Method

The dye-pigments and organic compounds are known as significant pollutants in wastewater of textile industrial. Among of treatment technologies, the photocatalysis using TiO2 nano particles has potential on-site process for removing the dye-pigments and organic compounds, due to no hazardous waste and inexpensive. In this work, the TiO2 nanoparticles were synthesized by two different methods of hydrothermal and sol-gel. Nanoparticle of TiO2 synthesized by hydrothermal method contained pure anatase phase as similar as the TiO2 nanoparticles synthesized by sol-gel method. However, the TiO2 synthesized by hydrothermal method provided the higher specific surface area and pore volume rather than the another TiO2. Further, the high efficiency 86% of methylene blue photodegradation was observed during the by using TiO2 synthesized by hydrothermal method as photocatalyst, whereas the efficiency was only 72% for TiO2 synthesized by sol-gel method.

High-efficiency preparation of high-quality YBCO superconducting films using an ultralow-fluorine sol–gel method

2014 ◽  
Vol 74 (1) ◽  
pp. 249-255 ◽  
Author(s):  
Yuanqing Chen ◽  
Xiaoru Yin ◽  
Yi Feng ◽  
Weibai Bian ◽  
Mengjuan Li ◽  
...  
Keyword(s):  
High Efficiency ◽  
Sol Gel ◽  
Superconducting Films ◽  
High Quality ◽  
Gel Method ◽  
Sol Gel Method ◽  
Ybco Superconducting Films

scholarly journals Development of TiO2 pastes modified with Pechini sol–gel method for high efficiency dye-sensitized solar cell

2008 ◽  
Vol 48 (3) ◽  
pp. 384-384 ◽  
Author(s):  
Mateja Hočevar ◽  
Urša Opara Krašovec ◽  
Marko Berginc ◽  
Goran Dražič ◽  
Nina Hauptman ◽  
...  
Keyword(s):  
Solar Cell ◽  
High Efficiency ◽  
Sol Gel ◽  
Dye Sensitized Solar Cell ◽  
Gel Method ◽  
Sol Gel Method ◽  
Dye Sensitized

Nanometer SrTiO3-Supported Ni-Based Catalyst in the Reaction of CO2 Reforming CH4 to Syngas

2010 ◽  
Vol 105-106 ◽  
pp. 819-822
Author(s):  
Chun Feng Wang ◽  
Hua Zhi Gu ◽  
Hao Chen
Keyword(s):  
Catalytic Activity ◽  
Sol Gel ◽  
Impregnation Method ◽  
Co2 Reforming ◽  
Gel Method ◽  
Sol Gel Method ◽  
Citrate Process ◽  
Lower Temperature ◽  
Supported Ni ◽  
Xrd And Tem

Superfine nanometer SrTiO3 with size of near 50-60nm was prepared by citrate process and sol-gel method. XRD and TEM characterizations indicate that sol-gel method is appropriate to prepare high-purity powders at far lower temperature than other methods. The Ni-based catalysts were prepared by using SrTiO3 powder as support through impregnation and sol-gel method. These catalysts were applied to the reaction of CO2 reforming CH4 to synas and showed high activity. The catalytic activity of Ni-based catalyst is investigated by reaction temperature, the method of support preparation, and the method of catalyst preparation; It shows that the catalyst possesses higher catalytic activity with the increasing of temperature; and the catalytic rate is near 90% at 973 K; and the catalyst show higher catalytic activity when support is prepared by sol-gel method than by citrate process; and the catalyst shows better catalytic activity when catalyst is prepared by sol-gel method than by impregnation method.

A novel counter electrode material of La0.5Sr0.5CoO3 for dye-sensitized solar cells

2016 ◽  
Vol 09 (01) ◽  
pp. 1650007 ◽  
Author(s):  
Yongfeng Zhong ◽  
Tianze Qin ◽  
Bo Yang ◽  
Xueqin Zuo ◽  
Guang Li ◽  
...  
Keyword(s):  
Solar Cells ◽  
High Efficiency ◽  
Sol Gel ◽  
Dye Sensitized Solar Cells ◽  
Perovskite Oxide ◽  
Counter Electrodes ◽  
Gel Method ◽  
Sol Gel Method ◽  
Dye Sensitized ◽  
Sensitized Solar Cells

In this work, La0.5Sr0.5CoO3 (LSCO) perovskite oxide with perfect crystallinity was successfully synthesized via a sol–gel method and then used as counter electrodes (CEs) for dye-sensitized solar cells (DSSCs). The DSSCs with LSCO CEs exhibited excellent electrocatalytic activity for the triiodide reduction and yielded a power conversion efficiency of 7.17%, which is greater than that of the Pt electrode (7.06%). Compared with the hydrothermal method and solvothermal method, sol–gel method is more suitable for large scale preparation. This work should open up a new class of CE materials for low-cost and high-efficiency DSSCs.

New High-Efficiency Red-Emitting Phosphor Produced by the Sol–Gel Method

2014 ◽  
Vol 50 (1) ◽  
pp. 29-34 ◽  
Author(s):  
O. M. Marchylo ◽  
Y. Nakanishi ◽  
H. Kominami ◽  
K. Hara ◽  
L. V. Zavyalova ◽  
...  
Keyword(s):  
High Efficiency ◽  
Sol Gel ◽  
Gel Method ◽  
Sol Gel Method ◽  
Red Emitting Phosphor

Development of TiO2 pastes modified with Pechini sol–gel method for high efficiency dye-sensitized solar cell

2008 ◽  
Vol 48 (1-2) ◽  
pp. 156-162 ◽  
Author(s):  
Mateja Hočevar ◽  
Urša Opara Krašovec ◽  
Marko Berginc ◽  
Goran Dražič ◽  
Nina Hauptman ◽  
...  
Keyword(s):  
Solar Cell ◽  
High Efficiency ◽  
Sol Gel ◽  
Dye Sensitized Solar Cell ◽  
Gel Method ◽  
Sol Gel Method ◽  
Dye Sensitized

A Brief Review: Immobilization of TiO2 Photocatalyst Materials on Supporting Surfaces for Degradation of Organic Pollutants

2021 ◽  
Vol 1044 ◽  
pp. 153-161
Author(s):  
Yulia Indriani ◽  
Afifah Sri Agustiah Putr Sutanti ◽  
Megadita Ayuningtyas ◽  
Hendri Widiyandari
Keyword(s):  
Organic Pollutants ◽  
High Efficiency ◽  
Sol Gel ◽  
Degradation Process ◽  
Synthesis Process ◽  
Gel Method ◽  
Sol Gel Method ◽  
Support Materials ◽  
Long Time ◽  
Milling Method

The process of final disposal of industrial wastewater is an important issue to avoid contamination. Photocatalyst technology can be a solution to waste control by degrading organic pollutants. The synthesis process of TiO2 catalyst immobilized with supporting materials has been proven more efficient in photocatalyst activation. This gives a high UV adsorption power and does not require further handling of the final purification process because it does not produce a catalyst suspension. Immobilization methods are simplest but still produce high efficiency, namely, the thermal milling method and the sol-gel method. Both methods can produce 97% efficiency. Immobilization using thermal milling can take quickly and only through one step but requires a long time in the degradation process. Besides, immobilization using the sol-gel method requires several steps, but the process of degradation is fast. The method used must be by the type of support material, the pollutants to be degraded, and the operating system like coating time. This paper focuses on the immobilization method suitable to support materials to maximize the degradation process.

The effect of the structure and oxygen defects on the simultaneous removal of NOx and soot by La2−xBaxCuO4

2019 ◽  
Vol 43 (10) ◽  
pp. 4196-4204 ◽  
Author(s):  
Lei Mao ◽  
Xuteng Zhao ◽  
Youhong Xiao ◽  
Guojun Dong
Keyword(s):  
Citric Acid ◽  
Sol Gel ◽  
Simultaneous Removal ◽  
Gel Method ◽  
Sol Gel Method ◽  
Oxygen Defects

La2−xBaxCuO4(x = 0–0.6) perovskite-like oxides were prepared by the citric acid sol–gel method.

Flexible Pd/CeO2–TiO2 nanofibrous membrane with high efficiency ultrafine particulate filtration and improved CO catalytic oxidation performance

RSC Advances ◽  
2015 ◽  
Vol 5 (72) ◽  
pp. 58120-58127 ◽  
Author(s):  
Wei Li ◽  
Yan Wang ◽  
Botao Ji ◽  
Xiuling Jiao ◽  
Dairong Chen
Keyword(s):  
Catalytic Oxidation ◽  
High Efficiency ◽  
Sol Gel ◽  
Nanofibrous Membrane ◽  
Fibrous Membrane ◽  
Gel Method ◽  
Sol Gel Method ◽  
Co Catalytic Oxidation ◽  
Oxidation Performance ◽  
Particulate Filtration

Flexible CeO2–TiO2 fibrous membrane was prepared by an electrospinning combined sol–gel method.

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