Microwave photochemistry IV: Preparation of the electrodeless discharge lamps for photochemical applications

Microwave photocatalysis II: novel continuous‐flow microwave photocatalytic experimental set‐up with titania‐coated mercury electrodeless discharge lamps

“…6,11 The lamp length was 50 mm (diameter 20 mm). Spectral measurements of prepared lamps (light intensity in µW cm −2 for the 366 nm line of mercury) were carried out using a spectrometer USB2000 with an optical fiber probe and operating software package OOIrrad-C (Ocean Optics, Dunedin, FL, USA).…”

“…Spectral measurements of prepared lamps (light intensity in µW cm −2 for the 366 nm line of mercury) were carried out using a spectrometer USB2000 with an optical fiber probe and operating software package OOIrrad-C (Ocean Optics, Dunedin, FL, USA). 6,7 TiO 2 film preparation and characterization Thin nanoporous TiO 2 film was prepared by dip-coating the pretreated support into the TiO 2 sol (titanium tetraisopropoxide, Triton X-100, cyclohexane, water) as described previously. 11 Withdrawal rate of the support was 6 cm min −1 and then the layers were thermally treated at 400…”

“…1,2 Some research groups are investigating the enhancement of photodegradation. 3,4 Recent articles and reviews reported the lab-scale preparation of electrodeless discharge lamps (EDLs), 5,6 their spectral measurements, 7 utilization in photochemistry 8 -10 and also in microwave-assisted photocatalytic decomposition of monochloroacetic acid. 11 While some of the physico-chemical principles of photocatalysis are relatively well understood, 12 the reactor engineering of photocatalytic units still requires consideration.…”

Microwave photochemistry V: Low‐pressure batch and continuous‐flow microwave photoreactors with quartz mercury electrodeless discharge lamps. Photohydrolysis of mono‐chloroacetic acid

“…The objective of microwave photochemistry is frequently, but not necessarily, connected with the electrodeless discharge lamp (EDL) which generates UV/Vis radiation when placed in the microwave field. 1,2 In recent papers and reviews on microwave photochemistry 1 we have described the preparation of EDLs, 3 spectral characteristics of the lamps, 4 and their application in organic photochemical synthesis 2,5,6 and in the microwave photocatalytic decomposition of mono-chloroacetic acid over nanoporous titania thin film. 7 Photolysis in microwave batch reactors has previously been described.…”

Estudo e aplicação das micro-ondas acopladas ao processo oxidativo avançado Fenton na degradação do corante tartrazina

“…A lâmpada de descarga sem eletrodo consiste em uma câmara de vidro preenchida com um gás inerte e uma substancia excitável, geralmente metais. O processo de geração de radiação UV-vis ocorre primeiramente com a ionização do gás inerte e depois a excitação dos átomos metálicos dentro do bulbo que quando retornam ao estado fundamental, liberam energia emitindo luz com o espectro caracterís-tico do elemento (CÍRKVA et al, 2006). Existem atualmente poucos estudos utilizando a LDE no processo de degradação de poluentes.…”