Catalytic membrane contactor, Polyoxometalates, FT-IR, SEM, EDS analysis

Abstract

In this study, 10-molybdo-2-vanadophosphoric (decamolydodivanadophosphoric) acid called POM having catalytic property, was initially synthesized and Fourier transform infrared (FT-IR), scanning electron microscopy (SEM), energy dispersive X-ray spectroscopy (EDS) and X-ray diffraction (XRD) analyses were carried out. Afterwards, POM was modified to the commercial Polyvinylidene Fluoride (PVDF) membrane surface to produce a new catalytic membrane contactor (CMC). FT-IR, SEM, and EDS characterization of the CMC were performed to clarify that the POM was modified to the membrane. Then, contact angle, pure water fluxes and pore size of the CMC and unmodified PVDF membranes were analysed and compared. Consequently, according to FT-IR and EDS analyses, the CMC was produced successfully and according to contact angle results, this membrane has more hydrophilic than PVDF membrane. Moreover, when the pure water flux values were compared, the CMC fluxes were less than that of PVDF membrane.

Keywords

• Catalytic membrane contactor
• Polyoxometalates
• FT-IR
• SEM

POM Temelli Katalitik Membran Kontaktörün Hazırlanması ve Karakterize Edilmesi

Abstract

Bu çalışmada ilk olarak katalizör özelliği olan POM olarak adlandırılan 10-molibdo-2-vanadofosforik (decamolybdodivanadophosphoric) asit sentezlenmiştir. Fourier dönüşümlü kızılötesi spektroskopisi (FT-IR), taramalı elektron mikroskobu (SEM), enerji dağılım spektroskopisi (EDS) ve X-ışınımı kırınımı (XRD) kullanılarak üretilen malzemenin analizleri gerçekleştirilmiştir. Devamında yeni bir katalitik membran kontaktör (CMC) oluşturmak için ticari polivinildin florid (PVDF) yüzeyine, üretilen POM modifiye edilmiştir. POM’un membran yüzeyine modifiye edildiğini göstermek için bu katalitik membranın FT-IR, SEM ve EDS karakterizasyonu yapılmıştır. Daha sonra CMC ve modifiye edilmemiş PVDF membranların, temas açısı, saf su akıları ve membran gözenek (por) analizleri yapılarak karşılaştırılmıştır. Sonuçlar irdelendiğinde FT-IR ve EDS analizlerine göre, CMC membran başarılı bir şekilde üretilmiştir ve temas açısı sonuçlarına göre CMC membran, PVDF membrana göre daha hidrofilik olduğu bulunmuştur. Ayrıca, her iki membranın saf su akı değerleri karşılaştırıldığında, CMC membranın saf su akısı PVDF membrana göre azaldığı bulunmuştur.

Keywords

• Katalitik membran kontaktör
• Çok oksitli metaller
• FT-IR
• SEM

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