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[Display omitted] • Hybrid materials with photothermal conversion performance were prepared for low-energy desorption of NH 3. • Temperature of rGO@MOF-303(Al)-8% could be raised to about 75 °C in 10 min. • About 68% of NH 3 could be effectively desorbed from the adsorbent in 2-hour irradiation. • Excellent desorption performance of NH 3 under sunlight irradiation is attributed to the rapid temperature rise of the adsorbent. The capture, storage and release of NH 3 play a pivotal role in sustainable energy applications. However, to simultaneously achieve high adsorption capacity and low energy desorption remains a challenge. In this work, a novel class of hybrid materials with photothermal conversion performance have been developed by doping redox graphene and metal–organic framework of MOF-303(Al). It is found that the optimized rGO@MOF-303(Al)-8% exhibits high NH 3 uptake (17.0 mmol g−1) at 25.0 °C and 1.0 bar and exceptional photothermal conversion performance. Under the irradiation of simulated sunlight, its temperature can be raised to about 75 °C in 10 min. Even under direct natural sunlight irradiation, a stable equilibrium temperature of 53 °C may be achieved. Based on this excellent photothermal conversion performance, we investigated the desorption behavior of ammonia under visible light irradiation for the first time. We found that due to the breakdown of hydrogen bonds of NH 3 and N-N, N–H sites of rGO@MOF-303(Al)-8% caused by the rapid rise of temperature, approximately 68% of NH 3 could be effectively desorbed in 2-hour irradiation under ambient conditions. In addition, the optimized adsorbent demonstrated remarkable cycling stability. After undergoing 10 cycles, high adsorption capacity and efficient light-induced desorption of NH 3 were still maintained Thus, the present study provides a novel concept for high-capacity adsorption and low-energy desorption of NH 3 and other industrial gases. [ABSTRACT FROM AUTHOR]