To　enable　the　widespread　application　of　surface-enhanced　Raman　scattering　(SERS)　technique　in　practical　sensing　of　organic　pollutants,　it　is　essential　to　develop　a　reliable　SERS　substrate　that　offers　both　high　sensitivity　and　reusability.　In　this　study,　we　employed　a　simple　and　rapid　in-situ　deposition　method　to　coat　Ag　nanoparticles　onto　flower-like　Ni(OH)2　spheres,　resulting　in　the　formation　of　Ni(OH)2/Ag　composites　with　excellent　photocatalytic　performance　and　SERS　activity.　These　composites　were　used　as　a　promising　SERS　analysis　tool　for　effective　detection　of　organic　pollutants,　including　ciprofloxacin　hydrochloride　(CIP)　and　methylene　blue　(MB).　Notably,　the　composites　exhibited　outstanding　detection　limits　of　10−8　M　for　MB　and　10−7　M　for　CIP,　respectively,　and　showed　a　strong　linear　relationship　between　SERS　intensities　and　the　logarithmic　concentration　(R2　≥　0.97).　Moreover,　under　simulated　sunlight　irradiation,　the　Ni(OH)2/Ag　composites　efficiently　degraded　MB　and　CIP　molecules　within　a　short　period　of　120　min　for　MB　and　130　min　for　CIP.　This　demonstrated　their　practical　reusability,　as　evidenced　by　their　consistent　performance　over　five　cycles　of　SERS　sensing.　These　findings　underscore　the　significant　potential　of　these　composites　for　SERS-based　detection　of　trace　pollutants　and　ecological　restoration　through　photocatalytic　reactions　in　the　future.　©　2023　Elsevier　B.V.