scholarly journals ETS-10 as a photocatalyst

2003 ◽  
Vol 5 (3) ◽  
pp. 131-140 ◽  
Author(s):  
Yuni K. Krisnandi ◽  
Peter D. Southon ◽  
Asoji A. Adesina ◽  
Russell F. Howe
Keyword(s):  
Carbon Dioxide ◽  
Acetic Acid ◽  
Photocatalytic Activity ◽  
Partial Oxidation ◽  
Complete Oxidation ◽  
Novel Material ◽  
Free Material ◽  
Microporous Titanosilicate

ETS-10 is a microporous titanosilicate zeolite with a framework containing linear Ti- O -Ti- O- chains. This paper describes an investigation of the photoreactivity of ETS-10 with the particular objective of evaluating the potential of this novel material as a zeolitic photocatalyst. The photoreactivity and photocatalytic activity of ETS-10 are strongly influenced by defects in the structure. A relatively defect free material catalyses photo-polymerisation of ethene, and in the presence of oxygen catalyses the partial oxidation of ethene to acetic acid and acetaldehyde, which remain strongly adsorbed in the pores. A more defective material is photoreduced when irradiated in the presence of adsorbed ethene, and catalyses the complete oxidation of ethene to carbon dioxide and water in the presence of oxygen. These differences are attributed to differences in the concentrations of exposed titanium sites associated with defects in the ETS-10 structure.

Synthesis of Au@UiO-66(NH2) structures by small molecule-assisted nucleation for plasmon-enhanced photocatalytic activity

2016 ◽  
Vol 52 (1) ◽  
pp. 116-119 ◽  
Author(s):  
Zhizhi Gu ◽  
Liyong Chen ◽  
Binhua Duan ◽  
Qiong Luo ◽  
Jing Liu ◽  
...  
Keyword(s):  
Carbon Dioxide ◽  
Acetic Acid ◽  
Photocatalytic Activity ◽  
Electronic State ◽  
Small Molecule ◽  
Alcohol Oxidation ◽  
Core Shell ◽  
Au Nps ◽  
Encapsulation Process ◽  
Lumo Level

Au@UiO-66(NH2) core/shell heterostructures were synthesized via an acetic acid/carbon dioxide-assisted solution-encapsulation process. Excited electrons, produced by photo-adsorption of UiO-66(NH2) and plasmonic sensitization with Au NPs, at the LUMO level with a localized electronic state were transferred to O2 for the enhancement of photocatalytic activity of alcohol oxidation.

scholarly journals Statistically Guided Synthesis of MoV-Based Mixed-Oxide Catalysts for Ethane Partial Oxidation

Catalysts ◽  
2018 ◽  
Vol 8 (9) ◽  
pp. 370
Author(s):  
Juan Jimenez ◽  
Kathleen Mingle ◽  
Teeraya Bureerug ◽  
Cun Wen ◽  
Jochen Lauterbach
Keyword(s):  
Acetic Acid ◽  
Partial Oxidation ◽  
Mixed Oxide ◽  
Structural Integrity ◽  
Product Distribution ◽  
Catalytic Performance ◽  
Oxide Catalysts ◽  
Acid Yield ◽  
Mixed Oxide Catalysts ◽  
Catalyst Composition

The catalytic performance of Mo8V2Nb1-based mixed-oxide catalysts for ethane partial oxidation is highly sensitive to the doping of elements with redox and acid functionality. Specifically, control over product distributions to ethylene and acetic acid can be afforded via the specific pairing of redox elements (Pd, Ni, Ti) and acid elements (K, Cs, Te) and the levels at which these elements are doped. The redox element, acid element, redox/acid ratio, and dopant/host ratio were investigated using a three-level, four-factor factorial screening design to establish relationships between catalyst composition, structure, and product distribution for ethane partial oxidation. Results show that the balance between redox and acid functionality and overall dopant level is important for maximizing the formation of each product while maintaining the structural integrity of the host metal oxide. Overall, ethylene yield was maximized for a Mo8V2Nb1Ni0.0025Te0.5 composition, while acetic acid yield was maximized for a Mo8V2Nb1Ti0.005Te1 catalyst.

scholarly journals The Effect of NAA and BA on Carbon Dioxide Assimilation by Shoot Leaves of Spur-type `Delicious' and `Empire' Apple Trees

1997 ◽  
Vol 122 (6) ◽  
pp. 837-840 ◽  
Author(s):  
Matej Stopar ◽  
Brent L. Black ◽  
Martin J. Bukovac
Keyword(s):  
Carbon Dioxide ◽  
Acetic Acid ◽  
Gas Exchange ◽  
Malus Domestica ◽  
Assimilation Rate ◽  
Carbon Dioxide Assimilation ◽  
Gas Exchange Parameters ◽  
Apple Trees ◽  
Fruit Thinning ◽  
Exchange Parameters

The effects of NAA, BA, or Accel on CO2 assimilation of shoot leaves of mature bearing Redchief `Delicious' and `Empire' apple (Malus ×domestica Borkh.) trees were evaluated over two seasons. BA at 50 mg·L-1 did not significantly affect any of the gas-exchange parameters measured. NAA (15 mg·L-1) consistently suppressed CO2 assimilation rate (from ≈10% to 24% below that of the control). This suppression was NAA-concentration dependent, continued for >15 days after treatment, and was completely overcome in `Empire', but only partially or not at all in `Delicious' when BA was combined with NAA. These results are discussed in relation to fruit thinning and NAA-induced inhibition of fruit growth in spur-type `Delicious'. Chemical names used: 2-(1-napthyl) acetic acid (NAA); N-(phenyl)-1H-purine-6-amine (BA); BA + gibberellin A (GA)4+7 (Accel).

scholarly journals POTENTIAL OF LIVESTOCK MANURE FOR COAL ACTIVATION

2017 ◽  
Vol 21 (1) ◽  
pp. 26 ◽  
Author(s):  
EllIN HARlIA HARlIA ◽  
MARlINA ET ◽  
MASITA R ◽  
RAHMAH KN
Keyword(s):  
Carbon Dioxide ◽  
Fatty Acids ◽  
Acetic Acid ◽  
Volatile Fatty Acids ◽  
Coal Bed ◽  
Coal Bed Methane ◽  
Anaerobic Conditions ◽  
Descriptive Approach ◽  
Carbon Dioxide Co2 ◽  
Reduction Of Co2

The natural methane formed by bacteria in anaerobic conditions is known as biogenic gas. Gas trapped in coal, formed through thermogenesis as well as biogenesisis known as coal-bed methane (CBM). The availability of organic material as decomposition of this material into methane is continuously required for the production of methane in the coal aquifer. The aim of this research was to investigate whether or not cattle feces bacteria were able to grow and produce methane in coal. Parameters measured were Volatile Fatty Acids (VFA) and the production of biogas, such as nitrogen, hydrogen, carbon dioxide, and methane. Explorative method was used and data obtained was analyzed by descriptive approach. The results showed that the bacteria found in the feces survived in the coal and produce biogas. On day 2 when the process was at the acidogenesis phase, it produced VFA with the largest component of acetic acid. Acetic acid would undergo decarboxylation and reduction of CO2 followed by reactions of H2and CO2 to produce methane (CH4) and carbon dioxide (CO2) as the final products. ,

Photocatalytic Activity of g-C3N4 in the Partial Oxidation of Benzyl Alcohol Under Visible Light

2020 ◽  
Vol 56 (2) ◽  
pp. 111-116
Author(s):  
V. V. Shvalagin ◽  
M. O. Kompanets ◽  
O. S. Kutsenko ◽  
S. Ya. Kuchmy ◽  
M. A. Skoryk
Keyword(s):  
Photocatalytic Activity ◽  
Visible Light ◽  
Benzyl Alcohol ◽  
Partial Oxidation ◽  
Oxidation Of Benzyl Alcohol
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