酸さん化か黒こく鉛えん

Meanings

1

graphite oxide

Technical term in chemistry for oxidized graphite; used in materials science and related fields.

黒こく鉛えん
黒鉛 is graphite, the base material; 酸化黒鉛 is its oxidized form.
グラフェン
Graphene is a single layer of carbon atoms; graphite oxide can be reduced to produce graphene.

Compound of 酸化 (oxidation) and 黒鉛 (graphite), directly describing the chemical product.