Cadmium　sulfide　(CdS)　nanocrystals　with　diverse　morphologies　are　extensively　utilized　in　various　fields.　For　example,　CdS　nanorods　are　widely　used　in　photocatalysis　and　photodetectors　due　to　their　high　efficiency　in　photogenerated　carrier　separation.　However,　existing　methods　for　synthesizing　CdS　nanorods　typically　require　high　temperatures　and　pressures,　which　limit　the　application　of　this　material.　In　this　work,　an　efficient　hot　injection　procedure　to　control　about　growth　in　Cadmium　sulfide　nanorods　by　optimizing　the　proportion　of　dodecanethiol　is　reported,　demonstrating　the　effective　control　of　CdS　nanorods　growth　by　dodecanethiol.　The　maximum　degradation　efficiency　of　CdS　nanorods　applied　to　photodegradation　of　Rhodamine　B　(RhB)　can　reach　96%,　indicating　that　the　synthesized　CdS　nanorods　have　excellent　photocatalytic　properties.　It　is　attributed　to　their　broad　absorption　within　the　visible　spectrum,　which　results　in　excellent　light　harvesting.　And　their　one-dimensional　structure　facilitates　carrier　separation.　Dodecanethiol　act　as　a　selective　role　within　morphology　of　the　CdS　nanomaterials,　which　is　anticipated　to　be　utilized　in　the　creation　of　other　sulfides　with　different　morphologies.　©　2025　SPIE.