3 research outputs found
The Adsorption Performance and Characterization of Activated Charcoal of Bone Char Against Acid Orange 7
No full textThe use of Acid Orange 7, a synthetic dye, in the textile industry harms the environment because it is carcinogenic. This research aims to remove the Acid Orange 7 dye dissolved in the water. This study used cow bone charcoal as an alternative adsorbent made by the carbonization method. In addition, the batch adsorption method was applied in the bleaching process of the synthetic dye waste, Acid Orange 7. Several tests, such as SEM, EDX, BET, XRD, and FTIR, were carried out to determine the characteristics and ability of activated charcoal from cow bones as an adsorbent for acid Orange 7 dye waste. Other organic adsorbents, such as graphene oxide and activated carbon, were used to compare the results. Bone char adsorption Acid Orange 7 62.2% efficiently. The adsorption efficiency of activated carbon is 79.8%, while graphene oxide has an adsorption rate of 89.4%. The findings revealed that bone char could be used to cure synthetic dye waste, Acid Orange 7, as an alternative. Additional treatmentÂ
The Effect of Activated Carb on Derived from Black Betel Leaf Biomass Waste as Composite Anodes on Lithium-Ion Battery Applications
No full textLithium-ion batteries have shown promising performance in high-energy storage systems for electric vehicles. The electrode material used in the battery affects the performance of the LIB. The material on the anode can be modified by adding activated carbon (AC) to the graphite. AC can be made from a variety of biomass wastes, including black betel leaf biomass. AC was prepared by hydrothermal carbonization method in an inert gas atmosphere and then activated with a KOH solution. AC material was then analyzed by SEM and FTIR. Li-ion batteries with 0%, 10%, and 20% activated carbon addition were tested with a battery analyzer. The resulting specific capacities of graphite-AC 0%, graphite-AC 10%, and graphite-AC 20% batteries were 115.57 mAh/g, 94.60 mAh/g, and 76.38 mAh/g, respectively. The battery was then cycle tested at a current of 0.5C, and the resulting battery with the addition of 20% activated carbon showed the best retention capacity of 88.34% after 50 cycles. The battery test results show that activated carbon from black betel leaves can be used as an anode material for lithium-ion batteries
The Effects of Graphene and Acetylene Black as Conductive Materials for Lithium-Ion Batteries
No full textThe quality of lithium-ion batteries is significantly impacted by the cathode. Besides their advantages in capacity and cycle life, NMC cathode has low electronic conductivity, which can affect electron transfer. To improve conductivity, the cathode material can be added with conductive additives. Commonly utilized as a conductive additive in the cathode of lithium-ion batteries is acetylene black. On the other hand, graphene offers superior properties, such as its large active surface area and conductivity. This research was conducted to compare AB, graphene, and their combinations as conductive additives for NMC cathode. The test results show that the combination of AB and graphene with a ratio of 1:1 produces the highest specific capacity, which is 161.32 mAh/g. The rate performance result produced by this combination is very good, with 91.38% and 80.07% capacity retention for discharging and charging rate performance, respectively, at 3C current. For the life cycle test after 50 cycles, the combination of AB and graphene with a ratio of 1:1 resulted in a capacity retention of 93.26%, which was higher than a battery that only uses AB or graphene as a conductive material at the cathode. Therefore, the combination of graphene and AB as conductive materials in lithium-ion batteries can produce batteries with good performance
