Sulfur recycling into value-added materials: a review

About 70 million tons of sulfur are produced yearly as a by-product of petroleum refining, and 10 millions are overproduced and accumulated, thus requiring advanced recycling strategies to reach a circular economy. Here we review the recycling of sublimed sulfur into value-added products with focus on nanotechnology, medicine, agriculture, sensors, electronics, polymers, photocatalysis, construction materials, food packaging, and preservation. Electronics include energy storage devices, light-emitting diodes, and photovoltaic devices.