排序方式: 共有7条查询结果,搜索用时 0 毫秒
1
1.
Isahak Wan Nor Roslam Wan Hasan Siti Zubaidah Ramli Zatil Amali Che Ba-Abbad Muneer M. Yarmo Mohd Ambar 《Research on Chemical Intermediates》2019,45(3):951-953
Research on Chemical Intermediates - 相似文献
2.
Wan Nor Roslam Wan Isahak Siti Zubaidah Hasan Zatil Amali Che Ramli Muneer M. Ba-Abbad Mohd Ambar Yarmo 《Research on Chemical Intermediates》2018,44(2):829-841
Mixed Cu and Mg oxides on nitrogen-rich activated carbon (AC) from Nypha fruticans biomass were characterized and their CO2 adsorption performance was measured. Highly dispersed CuO and MgO nanoparticles on AC was obtained using an ultrasonic-assisted impregnation method. The optimum adsorbent is 5%CuO–25%MgO/AC having good surface properties of high surface area, pores volume and low particles agglomeration. The higher content of MgO of 5%CuO–25%MgO/AC adsorbent contributes to less metal carbide formation which increases their porosity, surface area and surface basicity. XPS analysis showed some amount of nitrogen content on the surface of the adsorbent which increased their surface basicity towards selective CO2 adsorption. The presence of moisture accelerated the CO2 chemisorption to form a hydroxyl layer on the surfaces. The 5%CuO–25%MgO/AC adsorbent successfully adsorbed CO2 via physisorption and chemisorption of 14.8 and 36.2 wt%, respectively. It was significantly higher than fresh AC with better selectivity to CO2. 相似文献
3.
Muneer M. Ba-Abbad Mohd S. Takriff Abdul Wahab Mohammad 《Research on Chemical Intermediates》2016,42(6):5219-5236
The performance of Co2+-doped ZnO nanoparticles, prepared using the sol–gel method, for 2-chlorophenol degradation under direct solar radiation was investigated. Various parameters were investigated during the degradation process, namely solar intensity, Co2+ ion concentration, loading concentrations of Co2+-doped ZnO, and pH. The photocatalytic degradation efficiency increased when the initial concentration of 2-chlorophenol decreased; the optimum concentration was 50 mg/L under similar experimental conditions. Moreover, optimum values, established on a sunny day, were 0.75 wt% of Co2+, a 1 g/L loading concentration, and a pH of 6.0, respectively. The highest degradation efficiency observed was 95 %, after only 90 min of solar light irradiation. The mechanism of visible photocatalytic degradation using Co2+-doped ZnO was explained as a strong electronic interaction between Co2+, Co3+ and ZnO, and a promotion in the charge separation, which enhanced the degradation performance. The fragmentation of 2-chlorophenol under the optimal conditions was investigated using HPLC, comparing standards of all intermediate compounds. The pathway of the fragmentation was proposed as involving hydroxyhydroquinone, catechol, and phenol formation, which were then converted to non-toxic compounds such as oxalic acid and acetic acid with further decomposition to CO2 and H2O. 相似文献
4.
Ba-Abbad Muneer M. Takriff Mohd S. Benamor Abdelbaki Mohammad Abdul Wahab 《Journal of Sol-Gel Science and Technology》2017,81(3):880-893
Journal of Sol-Gel Science and Technology - Haematite (α-Fe2O3) nanoparticles (NPs) of different sizes and morphologies were prepared from two different iron precursors (iron acetate (A) and... 相似文献
5.
Muneer M. Ba-Abbad Abdul Amir H. Kadhum Abu Bakar Mohamad Mohd S. Takriff Kamaruzzaman Sopian 《Research on Chemical Intermediates》2013,39(5):1981-1996
The photocatalytic degradation of chlorophenols was evaluated under direct solar radiation using commercial ZnO catalyst. Effects of several parameters such as a catalyst loading, pH of solution and initial concentration on the degradation process have been investigated. The photocatalytic degradation efficiency of chlorophenols at the optimum value of the parameters was compared under similar experimental conditions. The results of efficiency and mineralization showed the degradation of 2-chlorophenol and 2,4-dichlorophenol compound with the first order kinetic rate and the rate constant decreases as the initial concentration of the chlorophenols increase. However, the rate constant was strongly affected by type of chlorophenols compound present either 2-chlorophenol or 2,4-dichlorophenol. The highest removal of chlorophenols was obtained after 120 min and the final intermediate compounds of chlorophenols degradation are lower molecular weight compound consisting of acetic acid which was analyzed through the HPLC. 相似文献
6.
7.
Ahmed Y. Musa Muneer M. Ba-Abbad Abdul Amir H. Kadhum Abu Bakar Mohamad 《Research on Chemical Intermediates》2012,38(3-5):995-1005
Zinc oxide nanoparticles were synthesized via the sol?Cgel method. The structures of the obtained nanoparticles were investigated by X-ray diffraction. The photocatalytic degradation of chlorophenolic compounds, namely 2-chlorophenol (CP), 2,4-dichlorophenol (DCP) and 2,4,6-trichlorophenol (TCP), was carried out using ZnO nanoparticles under solar intensity of 20?C26?W?m?2. The photocatalytic degradation efficiency of TCP?<?DCP?<?CP was found. The adsorption energies of the chlorophenolic compounds with ZnO catalyst were calculated from quantum chemical molecular dynamic model and found to increase in the order of TCP?<?DCP?<?CP. 相似文献
1