Preparation of magnetic hydrogel by in-Situ coprecipitation process - Ngoc Uyen Nguyen Thai4. CONCLUSIONS We synthesized magnetic hydrogel by the in-situ co-precipitation method. Two in-situ coprecipitations were performed. The process that involved the initial formation of calcium alginate hydrogel before incorporation with iron ion and co-precipitation to afford in-situ magnetic nanoparticles in alginate hydrogel showed the most eff...
7 trang | Chia sẻ: thucuc2301 | Ngày: 28/11/2020 | Lượt xem: 636 | Lượt tải: 0
Study of the effects of gympsum, pozzolanic additive mixtures and their fineness on the strength of PCB50 fico cement - Hoang Canh Nguyen4. CONCLUSION Pozzolanic additive has reduced the compresive strength of cement when mixed separately. However, when pozzolanic additive is mixed with gypsum additive, this additive mixture has increased the compresive strength of the cement at the late time (at the age of 28 days, the compresive strength of sample TP22 was 55.4 MPa; sample P22...
7 trang | Chia sẻ: thucuc2301 | Ngày: 28/11/2020 | Lượt xem: 587 | Lượt tải: 0
Magnetic adsorbents based on the composite of expanded graphite and NiFe2O4 for removal of heavy oils - Pham Van Thinh4. CONCLUSIONS In brief, this study presents the fabrication, characterization of the magnetic NiFe2O4 decorated EG and its excellent performance in adsorptive sequestration of diesel oil (DO) and crude oil (CO) from aqueous solution. The maximum adsorption capacity for DO and CO was found to be about 30.2 g DO and 25.8 g CO per 1 g of adsorben...
7 trang | Chia sẻ: thucuc2301 | Ngày: 28/11/2020 | Lượt xem: 666 | Lượt tải: 0
Graphene quantum dots as a reducing reagent and stabilizer for green synthesis of silver nanoparticles: Towards a hydrogen peroxide and glucose sensor - Tran Vinh Hoang4. CONCLUSIONS In summary, AgNPs have been successfully prepared by using GQDs as reducing agent and stabilizer. AgNPs/GQDs hybrid exhibits good performance for colorimetric detection of H2O2 and glucose. The simple fabrication procedure, effective discrimination ability, and low detection limit suggest that the proposed strategy may hold pract...
6 trang | Chia sẻ: thucuc2301 | Ngày: 28/11/2020 | Lượt xem: 648 | Lượt tải: 0
Chitosan-Templated lightweight spinel CoAl2O4 Nanofibril aerogels - Chau The Lieu Trang4. CONCLUSION We have shown for the first time the liquid templating of lightweight CoAl2O4 nanostructured aerogels by chitosan fibrils. A new phenomenon of swelling chitosan nanofibrils in Al3+-contained water was exploited to obtain a neutral aluminum-chitosan aqueous solutions. Our interesting finding is that the lyophilization of the cobalt...
11 trang | Chia sẻ: thucuc2301 | Ngày: 28/11/2020 | Lượt xem: 608 | Lượt tải: 0
Tailoring the structure and morphology of WO3 nanostructures by hydrothermal method - Luu Thi Lan Anh4. CONCLUSIONS We have successfully synthesized WO3 nanostructures with three different morphologies: nanoplate, nanoparticle and nanorod by hydrothermal and acid precipitation methods without using any structure-directing agent. The crystal of WO3 nanostructures transformed from orthorhombic, monoclinic to hexagonal corresponding with the chan...
8 trang | Chia sẻ: thucuc2301 | Ngày: 28/11/2020 | Lượt xem: 684 | Lượt tải: 0
Hoá học polime - Chương 2: Trùng hợp gốcMonome tan được trong dung môi Thu polime bằng phương pháp kết tủa hoặc chưng cất lại Tránh được các nhược điểm của trùng hợp khối Trong quá trình trùng hợp có thể xảy ra phản ứng chuyển mạch với dung môi Khối lượng trung bình thấp
39 trang | Chia sẻ: yendt2356 | Ngày: 28/11/2020 | Lượt xem: 1191 | Lượt tải: 0
Effects of Co doping on properties of ilmenite NiTiO3 Ceramics - Tran Tat Dat4. CONCLUSIONS In this study, highly crystalline Co-doped NiTiO3 powders were successfully synthesized via sol-gel method. The presence of Co modifies the optical properties of the NiTiO3 nanocrystalline powders. The substitution Co ions (10 mol.%) into Ni ions in NiTiO3 resulted in decreasing in optical band gap from 2.34 eV to 1.91 eV. The we...
8 trang | Chia sẻ: thucuc2301 | Ngày: 28/11/2020 | Lượt xem: 590 | Lượt tải: 0
Investigation of charge traps at Al-Doped hfo2/(100 Ingaas interface by using capacitance and conductance methods - Thoan Nguyen-Hoang4. CONCLUSION An improved n-In0.53Ga0.47As/HfO2 interface was achieved by Al doping of the HfO2 layer during deposition, resulting in a Dit near midgap close to 2×1012 cm−2eV−1. From this observation, we can conclude that the presence of Al at the In0.53Ga0.47As/HfO2 interface improves the electrical quality of the interface. It may possibly be...
9 trang | Chia sẻ: thucuc2301 | Ngày: 28/11/2020 | Lượt xem: 731 | Lượt tải: 0
Study on thermoluminescence properties of K2GdF5: Tb3+ - Ha Xuan Vinh4. CONCLUSION The results of structural analysis of the material showed that K2GdF5:Tb3+ material with the orthorhombic structure was successfully synthesized. The TL glow-curves of K2GdF5:Tb3+ has the simple and suitable shape for the dosimetry applications. The TL sensitivity of K2GdF5:Tb3+ is higher when compared with the CaSO4:Dy common dos...
8 trang | Chia sẻ: thucuc2301 | Ngày: 28/11/2020 | Lượt xem: 732 | Lượt tải: 0
