Basic bismuth nitrate Bi 6 O 6 (OH) 3 (NO 3 ) 3 •1.5H 2 O (BBN) modified Bi 2 WO 6 heterostructures was facilely synthesized by one-pot hydrothermal strategy. The modification of BBN effectively improves the photocatalytic activity of Bi 2 WO 6 for degradation and mineralization of Rhodamine B. The enhanced photocatalytic performance is attributed to the increased surface area and effective separation of photogenerated carriers induced by the potential difference at BBN/Bi 2 WO 6 interface. Furthermore, the micro-scaled heterostructure is easily recycled with excellent circulating stability. The work provides some new insights for the rational design and synthesis of basic salt modified Bi-system photocatalyst with high efficiency.