Seminar by Assoc. Prof. Dr. Bui Xuan Vuong and Assoc. Prof. Dr. La Duc Duong

At 14.00, March 7, 2025, the lectures from Assoc. Prof. Dr. Bui Xuan Vuong  and Assoc. Prof. Dr. La Duc Duong  take place in the Meeting Room B with detailed content as follows:

Assoc. Prof. Dr. Bui Xuan Vuong presented "Advanced MXene-porphyrin nanofiber hybrid materials for high-performance photocatalytic degradation of rhodamine B"

Abstract: 

Biochar was prepared by anaerobic heating coffee ground at 800oC for 3 hours. The prepared sample was used to adsorb crystal violet dye in an aqueous environment. The result showed that the biochar sample had good adsorption capacity for crystal violet dye, with a maximum adsorption capacity of 128.87 (mg/g). Response surface methodology (RSM) was also used to optimize the removal of crystal violet in an aqueous environment. ANOVA analysis showed that the model was statistically significant with a high R2 value and P < 0.0001. The model testing results showed that removing crystal violet was highly effective. Thus, low-cost biochar prepared from coffee grounds has great potential as an adsorbent material to remove crystal violet dye in an aqueous environment.

Assoc. Prof. Dr. La Duc Duong presented " Rutin Extraction and Purification from Sophora japonica L.: From Laboratory Research to Industrial Process"

Abstract:

Lithium-ion batteries (LIBs) are the cornerstone of modern energy storage, powering everything from consumer electronics to electric vehicles. While graphite has been the dominant anode material due to its stability and cycle life, its limited theoretical capacity (~372 mAh/g) presents challenges for next-generation high-energy-density applications. To overcome these limitations, researchers are exploring silicon (Si) and aluminum (Al) as alternative anode materials due to their significantly higher theoretical capacities (~4200 mAh/g for Si and ~990 mAh/g for Al). Silicon, despite its exceptional capacity, suffers from large volume expansion (~300%) during lithiation, leading to structural degradation and capacity fading. Various strategies, including nanostructuring, composite formation, and binder modifications, have been developed to mitigate these effects. Aluminum, with its higher electrical conductivity and lower cost, is also being investigated as a promising anode material. Recent advancements in alloying behavior, structural optimization, and composite engineering have improved the stability and cycle performance of both materials. This review discusses the challenges and breakthroughs in transitioning from graphite to silicon and aluminum anodes, highlighting key innovations in material design and battery performance enhancement. The development of these next-generation anodes will play a crucial role in meeting the growing demands for high-performance energy storage solutions