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Light. -The new photocatalyst Mo 0.1Ni0.1Cd0.8S is prepared from aqueous solutions of (NH 4)2MoO4, Ni(NO3)2, Cd(OAc)2, and Na2S (autoclave, 160 C, 16 h). The material exhibits outstanding photofixation ability of atmospheric nitrogen to produce ammonia under visible light irradiation. The obtained catalyst is Mo and Ni co-doped CdS with many sulfur vacancies, which not only serve as active sites to adsorb and activate N 2 molecules but also promote charge transfer from the catalyst to N2 molecules. -(CAO, Y.; HU*, S.; LI, F.; FAN, Z.; BAI, J.; LU, G.; WANG, Q.; RSC Adv. 6 (2016) 55, 49862-49867,