An XPS and FTIR study of SO2 adsorption on SnO2 surfaces

Berger, Franck; Bêche, Eric; Berjoan, R.; Klein, Dietmar; Chambaudet, A.

doi:10.1016/0169-4332(95)00319-3

Cited by 62 publications

(36 citation statements)

References 15 publications

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“…Furthermore, the Ti 2p1/2 peak in Ti(SO4)O located at 458.7eV could be ascribed to Ti 4+ oxidation state [79]. The binding energy of S 2p was observed at 167eV which agrees with the reported earlier values for S-O bonds in sulphate groups [80,81]. This elucidates that one of the oxygen atoms in the TiO2 nanocatalyst was replaced by sulphate group as in obtain nano-sized Ti(SO4)O catalyst.…”

Section: X-ray Photoelectron Spectrum (Xps)supporting

confidence: 80%

Synthesis of Ti(SO 4 )O solid acid nano-catalyst and its application for biodiesel production from used cooking oil

Gardy

Hassanpour

Lai

et al. 2016

Applied Catalysis A: General

149

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wt% free fatty acid. Furthermore, the catalytic activity and re-usability of the Ti(SO4)O for the esterification/transesterification of UCO were investigated. XRD results confirmed that the amount of SO species in the solid acid nano-catalyst slowly decreased with re-use after 8 cycles under optimized conditions, which is higher than the reusability of other functionalised titania reported in the literature .Finally, the biodiesel prodcued from this process satisfied the ASTM and European Norm standards.2

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Section: X-ray Photoelectron Spectrum (Xps)supporting

confidence: 80%

Synthesis of Ti(SO 4 )O solid acid nano-catalyst and its application for biodiesel production from used cooking oil

Gardy

Hassanpour

Lai

et al. 2016

Applied Catalysis A: General

149

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“…The S 2p spectra were fitted to two contributions. The contribution (Sl) with the lowest BE (167.3 eV) corresponds to SO~- [16] and is the major contribution in the spectra recorded from the alloys exposed for one and four cycles of exposure. The contribution at ]68.6 eV (S2) corresponds to SO~- [16] and is the major contribution found in the spectra recorded after 8 and 12 cycles of exposure.…”

Section: Xps and Aes Resultsmentioning

confidence: 99%

“…The contribution (Sl) with the lowest BE (167.3 eV) corresponds to SO~- [16] and is the major contribution in the spectra recorded from the alloys exposed for one and four cycles of exposure. The contribution at ]68.6 eV (S2) corresponds to SO~- [16] and is the major contribution found in the spectra recorded after 8 and 12 cycles of exposure. Given the ICEMS and Fe 2p XPS data, which indicate that Fe is mainly in the form of Fe 3 + oxyhydroxides, the large amount of sulphite and sulphate species has to be mainly related to Mn, which accumulate in the outer part of the corrosion layer as exposure time increases.…”

Section: Xps and Aes Resultsmentioning

confidence: 99%

Fe-Mn-Al-C Alloys: a Study of Their Corrosion Behaviour in SO2 Environments

Agudelo

Marco

Gancedo

et al. 2002

Industrial Applications of the Mössbauer Effect

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Abstract. The corrosion reaction of four Fe-Mn-AI alloys exposed to a cycling, dry-humid, S02 (0.001 % by volume) polluted atmosphere was studied. ICEMS, XPS, AES-SAM and transmission Mossbauer spectroscopy at different temperatures were employed to characterize the corrosion products. The analytical results indicate that (i) ferrihydrite is the main component of the rust; (ii) there is an abundant presence of Mn 2 + and SO~-/SO~-on the top of the corrosion layer, the concentration of SO~-increasing with the number of cycles; and (iii) the magnetic hyperfine pattern exhibited by the series of low-temperature spectra of the rust is quite different from that observed in the rust formed under similar corrosive environments on iron and weathering steel. This latter finding is correlated with a slow rate of transformation of the Fe 3 + species formed at the early stages of corrosion into ll'-FeOOH, the usual final product of this type of corrosion processes. The sulphate anions, abundant inside the electrolyte during the wet periods, could be incorporated to the ferrihydrite structure being responsible for the Mossbauer spectral pattern recorded from the corrosion products at low temperatures.

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“…The XPS analysis for Cu 2p and S 2p of ACCu-CoSPc-CS 2 has also been conducted to identify reaction products. Figure 8 showed an S 2p peak centered around 169.27 eV, indicating the possible presence of SO 4 2- (Berger et al 1996). Possibly, S species appeared in ACCu-CoSPc-CS 2 could be formed via oxidative processes.…”

Section: X-ray Photoelectron Spectroscopic Analysismentioning

confidence: 89%

Adsorption of carbon disulfide on activated carbon modified by Cu and cobalt sulfonated phthalocyanine

Wang

Ning

et al. 2015

Adsorption

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A series of adsorbents were studied for removal efficiency of carbon disulfide (CS 2 ) under micro-oxygen conditions. It was found that activated carbon modified by Cu and cobalt sulfonated phthalocyanine (CoSPc) denoted as ACCu-CoSPc showed significantly enhanced adsorption ability. Reaction temperature was found to be a key factor for adsorption, and 20°C seems to be optimal for CS 2 removal. Samples were analyzed by N 2 -BET, XRD, XPS, SEM-EDS and CO 2 -TPD. The characterization results demonstrated that large quantities of SO 4 2-anions were formed and adsorbed in the reaction process. SO 2 , CS 2 and COS were detected in the effluent gas generated from the temperature programmed desorption of ACCu-CoSPc-CS 2 . Therefore, it can be concluded that ACCu-CoSPc most likely acted as a catalyst in the adsorption/oxidation process on the surface of the impregnated sample. The generated sulfide and sulfur oxide can cover the active sites of adsorbents, resulting in pronounced reduction of adsorbent activity. Finally, the exhausted ACCu-CoSPc can be regenerated by thermal desorption.

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An XPS and FTIR study of SO2 adsorption on SnO2 surfaces

Cited by 62 publications

References 15 publications

Synthesis of Ti(SO 4 )O solid acid nano-catalyst and its application for biodiesel production from used cooking oil

Synthesis of Ti(SO 4 )O solid acid nano-catalyst and its application for biodiesel production from used cooking oil

Fe-Mn-Al-C Alloys: a Study of Their Corrosion Behaviour in SO2 Environments

Adsorption of carbon disulfide on activated carbon modified by Cu and cobalt sulfonated phthalocyanine

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