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We have prepared a super‐hydrophobic/super‐oleophilic modified sponge material (C‐PDMS‐PU) by attaching carbon powder and polydimethylsiloxane (PDMS) to a sponge skeleton by a simple dip‐coating method using a low‐cost polyurethane sponge as the raw material. The material has a C‐PDMS composite hydrophobic coating, which can efficiently and selectively absorb oil slicks on the water surface or organic solvents underwater that are 21–26 times its weight. Relying on this adsorbent, we have built an oil collection device that can in‐situ absorb/desorb oil with a dynamic viscosity ranging from 0 CP to 172 CP on the water surface or underwater. This oil collection device is small, simple to operate, and portable, thus freeing the adsorbent from the limits of adsorption capacity while continuously and efficiently recovering the oil from the sea surface, hence achieving the integration of adsorption and separation. This new adsorbent and the oil collection device have promising applications in emergencies, such as organic solvent spills, tanker spills, and oil spills from offshore rigs. [ABSTRACT FROM AUTHOR]

To quickly and efficiently recover precious metal gold from electronic waste products, we synthesized a novel hollow polym‐phenylenediamine (PmPD) nanosphere using the sacrificial template method and applied this materials to reduce and recover Au(III) in an aqueous solution. Experimental results show that the as‐prepared hollow PmPD has high selectivity and treatment capacity for Au(III), and can selectively reduce Au(III) from mixture metals solutions, including Cu2+, Zn2+, Ni2+, Cd2+, and Au(III) mixed solutions. Under room temperature and solution pH 4.0, the maximum treatment capacity of hollow PmPD for Au(III) reaches 1185.18 mg/g in 10 min of equilibrium time. The reduction ability of hollow PmPD remains stable in a pH range of 1.0 to 10.0 and under an ambient temperature ranging from 0 °C to 50 °C. Hollow PmPD can be regenerated via simple NaHSO3 solution washing, and its performance remains stable after repeated recycling. The satisfactory results obtained in treating the computer CPU leaching solution suggest that the hollow PmPD has broad application prospects in recovering gold from e‐waste. [ABSTRACT FROM AUTHOR]