Hints of Photocatalysis

Studies on the structure of activated carbon fibers activated by phosphoric acid

“…So we conclude that the formation of graphitelike aromatic structure plays a role in the enhancement of adsorption ability of ACF‐P. If the activation temperature is held below 300°C, many carbon atoms may still be in the SP3 state, so the fibers obtained possess weak adsorption affinity for the adsorbate. It was found that the intensity of the phenol peak in band E and the acetal peak in band C increased with increasing activation temperature at first and then decreased after 500°C and 400°C, respectively.…”

“…So we conclude that the formation of graphitelike aromatic structure plays a role in the enhancement of adsorption ability of ACF‐P. If the activation temperature is held below 300°C, many carbon atoms may still be in the SP3 state, so the fibers obtained possess weak adsorption affinity for the adsorbate.…”

“…It is well known that activated carbon fibers (ACFs) are one kind of highly effective fibrous adsorbent with high specific surface area, abundant micropores, small diameter, minimized external, and intradiffusional resistance to mass transfer, thereby exhibiting high adsorption capacity and velocity. Nowadays, ACFs have been successfully applied in many fields, such as the treatment of organic and inorganic waste gases, the recovery of organic solvent, air cleaning and deodorization, treatment of wastewater and drinking water, separation and recovery of precious metals, as medical adsorbents and protective articles, and in electrods 1–3. To reduce production costs, in our previous work,4–7 we prepared a new kind of ACF (ACF‐P) from sisal fiber (low‐cost precursor) by phosphoric acid activation at low temperature (low energy consumption).…”