ZnS nanoparticles embedded in N-doped mesoporous carbon plates are prepared and exhibit high energy storage performance.

Dissolution-precipitation is a novel high-efficiency method for separating oilwetted oil sands. Four dissolving agents and three precipitating agents were studied to select the optimal combination. Results showed that N,Ndimethylcyclohexylamine (DMCHA) and methanol were the optimal dissolving and precipitating agents, respectively. The chemical group compositions, element content, and H/C atom ratio of bitumen separated by DMCHAmethanol were analyzed, and the optimal conditions for oil sands separation were determined, under which the bitumen recovery reached 96.4%. After six separation cycles with DMCHA-methanol, the bitumen recovery remained above 93%. K E Y W O R D Sbitumen, dissolution-precipitation, high-efficiency separation, oil sands

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