All the above analyses point to the fact that GS967 UBOC should be a good photocatalyst. The photocatalytic degradation of toxic pollutants or organic dyes represents a general approach to estimate the performance of photocatalysts. The investigation was performed under solar light irradiation with RhB as a probe molecule in aqueous solution. And the corresponding activity of the CBOC is likewise presented for comparison. As characterized, the time profiles for the photodegradation reactions are refined and presented in Fig. 3a. The photodegradation of RhB is negligible in the absence of catalyst under solar light irradiation. The discoloration of RhB in the presence of UBOC and CBOC in the dark is also ignorable. However, the photodegradation reactions with photocatalysts are noticeable under solar light illumination. As shown in Fig. 3a, for 10 min solar light illumination, the photodegradation percentages of RhB are 99% and 52% for UBOC and CBOC, respectively. Moreover, the changes in the TOC reflect the degree of mineralization of an organic molecule during testing period. After solar light irradiation for 10 min, the mineralization efficiencies of UBOC and CBOC are evaluated to be 73.82 % and 29.92 %, separately. Prolonged the irradiation time to 30 min, the mineralization efficiencies are calculated to be 89.96 % and 49.11 %, respectively (Fig. 3b). In addition, the photodegradation percentages of colorless NBT over samples were provided. As depicted in Fig. S3, without the photosensitization of RhB dye, the decomposition percentages of NBT over UBOC are larger than genetic code of CBOC, demonstrating that ultrathin nanosheets built hierarchical architecture has a better photocatalytic capability than CBOC. The mineralization ratio is not in full accord with the photodegradation ratio, which means the formation of intermediates during the photodegradation process.