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Questions related from Amal Abdelhaleem
Dear All Please, I have an inquiry concerning PMS/dark process for degradation of organic pollutants. I noticed that the PMS/dark process can work for degradation of my pollutant at specific pH...
04 April 2018 8,531 13 View
Dear All I found that my pollutant can be degraded at pH=10 (pH adjusted by NaOH) under PMS/dark process. Please, what are the possible reasons to justify this phenomenon. Apart from base...
04 April 2018 6,307 4 View
Dear All Please, are there any compounds that cause activation of sole H2O2 under visible light?
11 November 2017 6,767 2 View
Dear All Please, What is the reason for the low activity of Fe(III) impregnated TiO2 compared to sole TiO2 under visible light. Although the Fe(III) impregnated TiO2 led to a high shift in the...
10 October 2017 3,417 0 View
Dear All Please, what is the reason behind the addition of acid during the preparation of Fe-doped TiO2 using impregnation method? I did not add acid during preparation, but the catalyst changes...
08 August 2017 2,084 6 View
Dear All What are the possible reasons for activation of metal free catalysts in the presence of PMS at alkaline pH 9.3. Although the catalyst will be negatively charged and the pollutant is...
03 March 2017 9,073 5 View
Dear All Please, Can you provide me with a good reference for preparation of MnFe2O4(core)/N doped TiO2 (shell) using sonochemical method. I bought MnFe2O4 as a commercial material (60 nm) and i...
12 December 2016 9,100 0 View
Dear All Please, Can you provide me with a good reference for preparation of MnFe2O4/N doped TiO2 Core shell using sol gel method. Regards,
11 November 2016 6,033 0 View
Dear All I want to measure sulfate radicals concentration using dimethyl sulfoxide. Please, can you provide me with a reference for measurement of sulfate radicals using dimethylsulfoxide. Regards,
11 November 2016 386 5 View
Dear All Please, i want to measure hydroxyl radicals generated during photocatalytic reaction using salicylic acid. Please, what is the suitable concentration of salisylic or it depends on the...
10 October 2016 4,390 1 View
Dear All I tried to dissolve about 0.03 g of ammonium tungstate in a mixture 30 mL of ethanol, 2.3 mL of CH3COOH, 0.74 mL of HCl and 3.5 mL of TBOT by stirring for 2 hrs, but i found that it does...
10 October 2016 7,687 1 View
Dear All What is the reason for increasing the catalyst activity during cycles of reuse test. Regards,
08 August 2016 4,736 0 View
Dear All Please, Can anyone provide with a good book for simple explanation of mathematical modeling in photocatalysis? Regards,
07 July 2016 2,612 0 View
Dear All I already prepared N doped TiO2 using sol gel technique. Please, may anyone provide with a preparation method to incorporate graphene with a solid catalyst of N doped TiO2? Regards,
07 July 2016 1,385 2 View
Dear All I adjusted the pH value to 2.5 and 3.5 for N doped TiO2 and I want to knnow if the catalyst can dissolve in these values or not. If N doped TiO2 has been dissolved, what are the expected...
07 July 2016 2,298 6 View
Dear All I noticed that at pH=8.6, there is a drop in pH when mixing 4 chlorophenoxyacetic acid with N doped TiO2 nanoparticles even without photo-reaction. Just at adsorption, pH goes from 8.6...
06 June 2016 1,605 11 View
06 June 2016 4,606 4 View
Dear All I prepared N doped TiO2 using Sol Gel method. I need to incorporate a commercial material of a recycling property with the prepared N doped TiO2. Please, may you provide me with a paper...
05 May 2016 3,673 0 View
Dear All Please, What is the cause of pale yellow color of TiO2 prepared by sol gel ? I prepared it as following: 5 ml Titanium isopropoxide + 50 ml isopropanol and added solution B (10 ml...
03 March 2016 5,392 3 View
Dear All I use this method to prepare P25/GO: For preparation of TiO2–GO composites, GO powder (25.2, 50,4, 252,or 378mg, which corresponded to GO to TiO2 ratios of 0.01, 0.05, 0.10, or0.15,...
01 January 2016 10,002 0 View
Dear All I used graphene oxide/P25 to degrade carbofuran pesticide, but the activity of the composite was lower than P25 itself. Please, can you help me to select another photoactive meterial to...
01 January 2016 5,012 4 View
Dear All I want to prepare P25/GO composite using colloidal blending method. some papers do ultrasonication for graphite oxide in 30 ml, then dilute it to 230 ml before mixing with P25. Can you...
12 December 2015 8,168 2 View
Dear AllThanks a lot for your favorable reply. I am using HPLC/UV detector and I use mobile phase of acetonitrile 60 % and Water 40 % and added 1 ml/ L H3PO4 for showing good peak. The final pH of...
11 November 2015 8,696 1 View
Dear All I used wavelength of 220 to measure carbofuran, but sometimes there are some other peaks although it does not contain any impurities. I am afraid of interference of these peaks with its...
11 November 2015 2,485 3 View
Dear All Can Chloride, sulfur, and Nitogen (1 %) in graphene oxide cause catalyst poisoning of TiO2? Regards,
11 November 2015 5,631 4 View
Dear All I used TiO2/GO 5% wt composite to degrade carbofuran at UV 350 nm and the activity of P25 was better than P25/GO 5% wt composite Also I used in visible range and there is no any activity...
11 November 2015 2,612 11 View
