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Physico-chemical evaluation of jackfruit seed starch and its application in cupcake

IOP Conference Series: Materials Science and Engineering 2020年第1期991卷

作者： V C Khang V T Thanh N P T Nhan T T Yen Nhi D T Nguyen T T Luu N T Quoc NTT Hi-Tech Institute Nguyen Tat Thanh University Ho Chi Minh City Vietnam Center of Excellence for Functional Polymers and NanoEngineering Nguyen Tat Thanh University Ho Chi Minh City Vietnam Agro-Forestry-Fisheries Quality Assurance Department Center for Agricultural Extension and Services Tien Giang Province Vietnam Center of Excellence for Biochemistry and Natural Products Nguyen Tat Thanh University Ho Chi Minh City Vietnam

Human widely uses starch as a rich carbohydrate source and inexpensive. They are used in many fields such as food, cosmetics, medicine due to the diverse structure and functionality of starch. Corn and tapioca starch are widely used and available in the market. Meanwhile, jackfruit starch is a new starch and people are concerned because they can bring economic benefits for manufacturers as well as their physical and chemical properties. The purpose of this study is therefore to evaluate the physicochemical properties of starch from jackfruit seeds, corn starch and cassava starch to select appropriate starch and apply jackfruit seed starch in food. Jackfruit starch was extracted from jackfruit seeds by alkaline steeping extraction method. Corn starch and tapioca starch were bought in the market. Some biological and physiochemical properties of starch seed from jackfruit such as nutrition, morphology, particle size distribution, viscosity, XRD and FTIR were approximately similar with tapioca and corn starch. The obtained results showed that jackfruit seed starch could be a potential alternative to the conventional starches. Moreover, can replace 15% of wheat flour into jackfruit seed starch in the process of cupcake. These result will generalize the characteristics of type of starches so that it can be applied to each specific process.

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Adsorption capability for Congo Red on exfoliated graphene-decorated CoFe2O4 nanocomposite: Kinetic, isotherm, thermodynamic and recyclability studies

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IOP Conference Series: Materials Science and Engineering 2020年第1期959卷

作者： L V Tan N T Hong-Tham P V Thinh NTT Hi–Tech Institute Nguyen Tat Thanh University Ho Chi Minh City 700000 Vietnam Ben Tre's Department of Science and Technology Ben Tre Province 86000 Vietnam Center of Excellence for Green Energy and Environmental Nanomaterials Nguyen Tat Thanh University Ho Chi Minh City 700000 Vietnam Center of Excellence for Functional Polymers and NanoEngineering Nguyen Tat Thanh University Ho Chi Minh City 700000 Vietnam

In the present work, we investigated kinetics and isotherms of the adsorption process of EG@CoFe2O4 adsorbent toward Congo Red dye in aqueous solution. Four kinetic models (pseudo first-order, pseudo second-order, Elovich, and Bangham) and four isotherm models (Langmuir, Freundlich, Temkin, and Dubinin–Radushkevich) were estimated elucidate the adsorption mechanism. Current results show that the pseudo second-order model is the most appropriate kinetics for the adsorption and that the monolayer behavior (Langmuir model), rather than multilayer behavior (Freundlich equation), is more suitable to describe the adsorption. The adsorption process was confirmed to be endothermic and spontaneous via thermodynamic study. On the other hand, via Boehm's titration we confirmed that EG@CoFe2O4 can contain functional groups (carboxylic, phenolic, laconic groups and basic groups) with the respective amount of 0.020, 0.044, 0.032, and 0.156 mmol/g. The EG@CoFe2O4 showed high maximum adsorption capacity (98.60mg/g), and good recyclability.

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A Simple Route for the Synthesis of Fe/C composite derived from the metal-organic framework MIL-53 (Fe)

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Materials Today: Proceedings 2019年 18卷 2422-2429页

作者： Duyen Thi Cam Nguyen Hanh Thi Ngoc Le Thuan Van Tran Oanh Thi Kim Nguyen Trinh Duy Nguyen Do Trung Sy Dai-Viet N. Vo Tri Duc Lam Long Giang Bach Doan Van Thuan NTT Hi-Tech Institute Nguyen Tat Thanh University Ho Chi Minh City Viet Nam Faculty of Pharmacy Nguyen Tat Thanh University Ho Chi Minh City Viet Nam Institute of Hygiene and Public Health Ho Chi Minh City Viet Nam Center of Excellence for Green Energy and Environmental Nanomaterials Nguyen Tat Thanh University Ho Chi Minh City Viet Nam Department of Chemical Engineering Pukyong National University Busan South Korea Institute of Chemistry Vietnam Academy of Science and Technology Hanoi Viet Nam Faculty of Chemical and Natural Resources Engineering Universiti Malaysia Pahang Malaysia Center of Excellence for Functional Polymers and NanoEngineering Nguyen Tat Thanh University Ho Chi Minh City Viet Nam

The Fe/C composite plays the crucial role in various practical applications, therefore, the synthesis of this composite has attracted much attention. Herein, we described the simple method for the synthesis of Fe/C composite derived from the metal-organic framework MIL-53 (Fe). The MIL-53 (Fe) precursor was initially fabricated using the solvothermal strategy, and transformed into porous Fe/C via a direct pyrolysis procedure. Both MIL-53 (Fe)and Fe/C were also characterized using the several techniques to compare the change of crystalline profile, surface chemistry, morphological property, saturation magnetization, pH point of zero charge and surface area among them. The surface areas measured revealed an enormous change from 7.6 m 2 /g in MIL-53 (Fe) to 196.1 m 2 /g in Fe/C the Raman spectra also gave evidence of the presence of graphitic carbon in the Fe/C structure.

关键词： Fe/C composite MIL-53 (Fe), metal-organic framework characterization

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Porous Nanosilica Hybrids Biocompatible Polymer For Enhancing Anticancer Drugs Loading Efficiency And Targeted Delivery

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Materials Today: Proceedings 2019年 18卷 4157-4163页

作者： Uyen Vy Vo Thi Hiep Nguyen Manon Gallais Hieu Vu-Quang Cuu Khoa Nguyen Tri Duc Lam Duy Chinh Nguyen Long Giang Bach Dai Hai Nguyen Graduate University of Science and Technology Vietnam Academy of Science and Technology Hanoi Viet nam Institute of Applied Materials Science Vietnam Academy of Science and Technology Ho Chi Minh city Viet nam International University Vietnam National University- Ho Chi Minh City (VNU_HCMC) Ho Chi Minh City Viet nam NTT Institute of Hi-Technology Nguyen Tat Thanh University Ho Chi Minh City Viet nam Center of Excellence for Functional Polymers and NanoEngineering Nguyen Tat Thanh University Ho Chi Minh City Viet nam

Porous nanosilica nanoparticles (PNS) is a fascinating candidate for drug delivery systems (DDS) due to its meso-porous structure. However, burst release from the unmodified PNS nanoparticles is remained as a disadvantage of this material. In this study, we aim to produce [email protected] , a smart nanoparticles that can control the release of doxorubicin (Dox) dependent on the pH of the environment. The nanoparticles after modification was spherical with size about 65nm ± 15, which revealed by transmission electron microscopy (TEM). The Dox loading efficiency and capacity was 57.81% and 11.79% respectively. In vitro Dox release from [email protected] nanoparticles at pH 4.5 is significantly higher than the its release at pH 7.4 (76.4% vs 42.4%). These results suggested that our nanoparticles had showed potential application in cancer therapy.

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Response surface methodology optimization of Congo Red dye adsorption onto MnFe-LDH adsorbent

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IOP Conference Series: Materials Science and Engineering 2020年第1期959卷

作者： L V Tan N T H Tham D T Sy NTT Hi–Tech Institute Nguyen Tat Thanh University Ho Chi Minh City 700000 Vietnam. Ben Tre's Department of Science and Technology Ben Tre Province 86000 Vietnam Center of Excellence for Green Energy and Environmental Nanomaterials Nguyen Tat Thanh University Ho Chi Minh City 700000 Vietnam Center of Excellence for Functional Polymers and NanoEngineering Nguyen Tat Thanh University Ho Chi Minh City 700000 Vietnam Institute of Chemistry Vietnam Academy of Science and Technology Ha Noi City Vietnam

This study was carried out to optimize the adsorption process toward Congo Red (CR) dye over Mn-Fe LDH material in aqueous media. The effects of three variables including initial concentration, pH and reaction time were investigated with respect to maximal CR removal efficiency by utilizing response surface methodology (RSM). Through the variance of ANOVA, the second-order polynomial model was established in accordance with experimental data with high R2 values (R2=0.997), large F-value and small p-value, indicating that the proposed model is statistically significant. The estimated optimal conditions were validated by confirmation experiments. It was revealed that CR adsorption efficiency reached 53.21% at following optimal conditions: Ci = 48.09 mg/L; pH = 5.62; reaction time = 107 min. These results show that Mn-Fe LDH is used as an effective adsorbent for the removal of organic pigments in aqueous solution.

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Adsorption behavior of Congo red dye from aqueous solutions onto exfoliated graphite as an adsorbent: Kinetic and isotherm studies

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Materials Today: Proceedings 2019年 18卷 4449-4457页

作者： Thinh Van Pham Thuan Van Tran Trinh Duy Nguyen Nguyen Thi Hong Tham Phan Thanh Tri Quang Dao Thi To Uyen Nhan Thi Hong Le Dai-Viet N. Vo Nguyen Trung Thanh Long Giang Bach NTT Hi-Tech Institute Nguyen Tat Thanh University Ho Chi Minh City Viet Nam Graduate University of Science and Technology Vietnam Academy of Science and Technology Ha Noi City Viet Nam Center of Excellence for Green Energy and Environmental Nanomaterials Nguyen Tat Thanh University Ho Chi Minh City Viet Nam Department of Chemical Engineering Pukyong National University Busan South Korea Ho Chi Minh City University of Technology Vietnam National University-Ho Chi Minh City Ho Chi Minh City 703500 Viet Nam Faculty of Chemical and Natural Resources Engineering Universiti Malaysia Pahang Malaysia Deparment of Environmental Engineering An Giang University Long Xuyen City An Giang Province Viet Nam Center of Excellence for Functional Polymers and NanoEngineering Nguyen Tat Thanh University Ho Chi Minh City Viet Nam

Herein, we reported a facile method to fabricate the exfoliated graphite (EG) by Hummer’s method via a two-step procedure including intercalation with a mixture of oxidants (H 2 O 2 and H 2 SO 4 ), and exfoliation using a microwave system. For the adsorption experiments, effect of contact time (0–210 min), initial concentration (20–60 mg/L), pH (4–10), and EG dosage (0.3–0.7 g/L) were systematically studied. Moreover, the adsorption kinetics (pseudo-first-order, pseudo-second-order, Elovich, and Bangham) and isotherms (Langmuir, Freundlich, Temkin, and Dubinin-Radushkevich) were carried out to elucidate the mechanism of CR adsorption over EG. Due to high porosity (40.95 m 2 /g) and large maximum adsorption capacity of CR (80.775 mg/g), the EG derived from natural graphite can be an effective adsorbent for CR dye treatment in aqueous solution.

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Comparative study on removal of Monodyes by using Ni-Al layered double hydroxides

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IOP Conference Series: Materials Science and Engineering 2020年第2期736卷

作者： T T U Dao T H T Nguyen T T Q Phan T S Do D V N Vo N A Tien Center of Excellence for Green Energy and Environmental Nanomaterials Nguyen Tat Thanh University Ho Chi Minh City Vietnam NTT Hi-Tech Institute Nguyen Tat Thanh University Ho Chi Minh City Vietnam Faculty of Chemical Engineering and Food Technology Nguyen Tat Thanh University Ho Chi Minh Vietnam Institute of Chemistry Vietnam Academy of Science and Technology Hanoi Vietnam Faculty of Chemical and Natural Resources Engineering Universiti Malaysia Pahang Malaysia Ho Chi Minh City University of Education Ho Chi Minh City Vietnam Center of Excellence for Functional Polymers and NanoEngineering Nguyen Tat Thanh University Ho Chi Minh City Vietnam

The toxic and carcinogenic effluents discharged from the textile and garment industry represent a major concern to the environment and public health. Treatment technologies for these effluents to reduce toxicity and dye concentration are therefore crucial. The objective of this study was to focus on eliminating four monoazo dyes including Congo (CR), Methyl orange (MO), Methylene blue (MB) and Crystal violet (CV) using adsorbents, Ni/Al LDHs. The results proved that Ni/Al LDHs exhibit excellent adsorption capacity on anionic dyes (CR, MO) instead of cationic dyes (CV, MB). The maximum adsorption capacity of Methyl Orange on Ni/Al LDHs was found to be 93.517 mg/g and Congo red at 87.975 mg/g. In addition, the study of leaching test of adsorbents show stable synthetic materials in aqueous media. The analyses mentioned above indicates that Ni/Al LDHs may be a promising adsorbent to remove anion dyes from aqueous media.

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