%0 Journal Article %T Synthesis of Microporous Nano-Composite (Hollow Spheres) for Fast Detection and Removal of As(V) from Contaminated Water %+ University of Sadat City [Menoufia] %+ Chemistry Department, Faculty of Science, Assiut University %+ University of Jeddah %+ Jouf University (SAUDI ARABIA) %+ Nuclear Materials Authority [Le Caire] %+ Central Metallurgical Research and Development Institute (CMRDI) %+ Polymères Composites et Hybrides (PCH - IMT Mines Alès) %A Zaid, Osama %A El-Said, Waleed %A Yousif, Ahmed %A Galhoum, Ahmed %A Elshehy, Emad %A Ibrahim, Ibrahim %A Guibal, Eric %< avec comité de lecture %@ 1385-8947 %J Chemical Engineering Journal %I Elsevier %V 390 %P 124439 %8 2020-06 %D 2020 %R 10.1016/j.cej.2020.124439 %K Core-Shell Nanoparticles %K Sensors %K Silica %K Molybdenum Oxide %K Water Treatment %K Arsenic Removal %Z Engineering Sciences [physics]Journal articles %X A simple method has been designed for preparing a new material based on the interactions of cellulose acetate (mixed with an alkaline urea solution, CA/urea), cetyltrimethylammonium bromide (CTAB) with tetraethyl orthosilicate in alcohol (CTAB/TEOS). In a second step the material is loaded with molybdate. The nano-objects produced by this procedure are characterized as microporous hollow spheres with a morphology similar to hollow wagon-wheels. These materials were used not only for As(V) removal (specific affinity of As(V) for Mo(VI)), but also for naked-eye detection of As(V) in solution. The chemical and physical characteristics of these nano-objects have been analyzed through XRD, FTIR, HR-TEM, EDX, TGA/DTG and N2 sorption/desorption isotherms. The nano-sized sorbent/sensor has large surface-to-volume ratios (715.5 m2 g-1 and 0.295 cm3 g-1, respectively). Sorption capacity reaches 2 mmol As g-1 at optimum pH 1.8. Fast mass transfer properties allows reaching the equilibrium within 20-25 min (kinetics controlled by pseudo-first order rate equation). This structure allows ultra-fast, specific and pH-dependent visual detection of As(V): the limit of detection is evaluated to 0.3 µmol L-1 (limit of quantification: ≈1 µmol L-1). The nano-particles show remarkable long-term stability with good reproducibility after five regeneration cycles (loss in sorption and desorption efficiencies less than 5 %). The recovery of As(V) from dilute solutions reaches up to 93 %, when applied to water collected from Nile river. %G English %2 https://imt-mines-ales.hal.science/hal-02479135/document %2 https://imt-mines-ales.hal.science/hal-02479135/file/synthesis-of-microporous-nano-composite.pdf %L hal-02479135 %U https://imt-mines-ales.hal.science/hal-02479135 %~ INSTITUT-TELECOM %~ EM-ALES %~ INSTITUTS-TELECOM