Tra bac activated carbon used as electrode material in aqueous supercapacitor - Van Man TranThe EDLC electrode made from Tra Bac coconut shell activated carbon exhibited a good capacitance, especially in KOH solution. The addition of acetylene black C65 enhanced capacitance due to improvement of electric conduction. The capacitance was 20 F/g at 1 A/g and 12.5 F/g at 10 A/g. The stable charge/discharge was verified that 88 % the initia...
9 trang | Chia sẻ: honghp95 | Ngày: 02/12/2020 | Lượt xem: 468 | Lượt tải: 0
Application of tio2–p25 in the photodegradation of n–lauryl diethanolamine and cinnamic acid in presence of oxygenThe adsorption and photolysis of n–LDA and CA with TiO2–P25 catalyst were not substantial. The nature of reactant played a decisive role in determining the optimal reaction condition. Photodecomposition of CA occurred more hardly than n–LDA and higher catalyst concentration was needed. n–LDA with pKa = 8.7 should be photodecomposed favorably at ...
8 trang | Chia sẻ: honghp95 | Ngày: 02/12/2020 | Lượt xem: 632 | Lượt tải: 0
Effects of nd2o3 on the crystallization and properties of glass ceramic in li2o–k2o–al2o3–sio2– p2o5 systemThe effects of Nd2O3 content (0–1 wt%) on crystallization and the properties of GC derived from the system Li2O–K2O–Al2O3–SiO2–P2O5 were discussed. The results showed as follows: 1. The results of DTA showed the small variation of characteristic temperatures of glass powders, especially the melting temperature Tm. It means that the GC system can...
11 trang | Chia sẻ: honghp95 | Ngày: 02/12/2020 | Lượt xem: 746 | Lượt tải: 0
Synthesis and electrochemical properties of mesoporous carbon supported well–dispersed cobalt oxides nanoparticles - Nguyen Van TuWell-dispersed cobalt oxide nanoparticles supported on mesoporous carbon CMK-3 have been synthesized successfully. The prepared composites can have as high as 15 wt% cobalt. The sample possesses a good dispersion of cobalt particles (~4 nm) and a surface area of up to 1160 m g? The electrochemical testing results suggest that the mesoporous structu...
8 trang | Chia sẻ: honghp95 | Ngày: 02/12/2020 | Lượt xem: 556 | Lượt tải: 0
Effect of preparation conditions of biochar from rice straw by hydrothermal carbonization - Ngoc Bich NguyenRSM was successfully used to investigate the effects of preparation variables on the MB removal. HTC temperature was found to be the most significant effect on responses. In contrast, the RS/water ratio was insignificant on the response. The optimum BC was obtained by using HTC temperature, HTC time and RS/water ratio of 194.07 °C, 9.00 h and 5....
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Electrospray method: processing parameters influence on morphology and size of pcl particles - Linh Viet Nguyen VuThe flow rate is a main processing parameters effects morphology of electrosprayed particles. Increasing flow rate from 0.5 mL/h to 2 mL/h caused bigger electrosprayed particles size, but the aggregation happened when the flow rate increased to 4 mL/h. Furthermore, the desirable microspheres were formed using a suitable set of parameters: flow rate...
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Effects of several factors on anti–vibration ability of epdm rubber - Phan Quoc PhuThe results in this study indicated that, by the way of changing the morphology in the sample by using TEA to make the porous structure or altering the sulfur and carbon black contents to change the amount of cross-linking in the compound (the strong chemical bonds of the sulfur linkages between the chains of the rubber molecules and the strong int...
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Synthesis of pure silica from rice husk ash as an anti–caking agent for fertilizer industry In Vietnam - Nguyen Huu HieuIn this study, the silica from RHA was successfully synthesized by precipitation method at pH 7. The effect of experimental factors on the purity and the extracted yield of silica were studied and suitable synthesized conditions were determined as 1 N of NaOH, 120 minutes of reaction time, 5 N of HCl and 50 % volume of ethanol in the washing sol...
9 trang | Chia sẻ: honghp95 | Ngày: 02/12/2020 | Lượt xem: 598 | Lượt tải: 1
Enzymatic preparation of modulated– biodegradable hydrogel nanocomposites based chitosan/gelatin and biphasic calcium phosphate nanoparticles - Nguyen Tien ThinhIn situ forming hydrogel composites consisted of tyramine conjugated gelatin, 4–hydroxyphenylacetic acid conjugated chitosan and BCP were successfully prepared via horseradish peroxidase mediated reaction in the presence of hydrogen peroxide. With a rapid gelation time at the physiological condition and controllable biodegradation rate, the hydr...
8 trang | Chia sẻ: honghp95 | Ngày: 02/12/2020 | Lượt xem: 486 | Lượt tải: 0
Catalyst–free growth of well–aligned zno nanowires on graphene/si substrateby thermal evaporation - Tran Van KhaiIn conclusion, vertically well–aligned ZnO NW arrays have been successfully synthesized on graphene/Si substrate without catalyst or additives by a simple thermal evaporation method. The as–synthesized ZnO NWs had diameters in the range of 300–350 nm, lengths over several tens micrometers. The SEM, HRTEM, XRD and Raman measurements revealed that...
11 trang | Chia sẻ: honghp95 | Ngày: 02/12/2020 | Lượt xem: 539 | Lượt tải: 0
