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Water pollution has posed a serious threat to the environment and human health. There is an urgent need to develop highly efficient and application‐convenient photocatalytic materials. To overcome this critical problem, the carbonized nickel‐loaded spent coffee grounds modified BiOCl (CNSCG‐BOC‐8) photocatalyst is prepared by using facile calcination and hydrolysis method. The optimum substrate carbonization temperature, the amount of substrate, and the loading amount of nickel ion are discussed. Further, the photocatalytic performance of the catalyst is tested using Ofloxacin (OFX) as target pollutant under ultraviolet and visible light (UV–vis light). The as‐obtained photocatalysts show the degradation efficiency of OFX in the prepared composite reaches 87% within 40 min under ultraviolet and visible light. Moreover, the results show that CNSCG‐BOC‐8 has better photoelectricity, excellent cycle stability, and is environment‐friendly. Therefore, this paper provides an important reference for the rational development and use of Ni‐loaded biomass‐derived carbon as the substrate to modify bismuth‐based photocatalyst for environmental remediation. [ABSTRACT FROM AUTHOR]

Given that currently more high-efficiency photocatalysts are needed to address environmental pollution, this paper has proposed an effective method of P123-modified synthesis of BiOCl nanosheet/bismuth nitrate (BiOCl/BBN) heterojunctions. The photocatalytic results showed that the BiOCl nanosheet with BiOCl/BBN heterojunctions (BOC-1) exhibited 100% efficiency in the photocatalytic degradation of RhB within 3 min under visible light, simultaneously demonstrating beneficial stability and recyclability. The effectiveness of the photocatalytic activity of BOC-1 was ascribed to the formation of BiOCl/BBN heterojunctions and P123 modification, which facilitated the separation of carriers. This study offers a convenient and effective approach for the synthesis of high-efficiency heterogeneous photocatalysts for the removal of environmental pollutants. [ABSTRACT FROM AUTHOR]

Heterogeneous photocatalysis provides a sustainable pathway to solve the problems of energy shortage and environmental remediation. In this work, rose-like SiO 2 @BiOCl/Bi 24 O 31 Cl 10 photocatalyst is composed of mesoporous SiO 2 , BiOCl nanosheets and Bi 24 O 31 Cl 10 nanoparticles. The as-obtained photocatalysts show satisfactory photocatalytic degradation of ofloxacin (OFX) efficiency, which could remove 90% of OFX in 6 min under UV–visible light irradiation. Moreover, Rose-like SiO 2 @BiOCl/Bi 24 O 31 Cl 10 catalysts showed good stability and recyclability, it maintained a removal efficiency of 81% in the tenth cycle. The enhancement of catalytic activity is mainly attributed to the presence of SiO 2 , which increases the light scattering and broadens the light absorption range. Furthermore, the synergistic effect between the SiO 2 , BiOCl and Bi 24 O 31 Cl 10 could effectively accelerate the separation of the photo-generated carriers, which facilitate to generate reactive oxygen species, then effectively degrade the OFX. Therefore, this paper provides an important step for the rational synthesis of mesoporous SiO 2 heterojunction photocatalysts for environment remediation. [Display omitted] • The synyhesis method of rose-like mesoporous SiO 2 @BiOCl/Bi 24 O 31 Cl 10 compounds is facile were synthesized by a facile hydrothermal process. • SiO 2 substance provided hydrothermal stability and improve the optical absorption of the catalysts by light scattering. • SiO 2 @BiOCl/Bi 24 O 31 Cl 10 compounds displayed 90% efficiencies in photocatalytic degradation of ofloxacin within 6 min under the UV–visible light. • The SiO 2 @BiOCl/Bi 24 O 31 Cl 10 heterojunctions could promote the separation of electron-hole pairs, thus enhancing the photocatalytic activity. [ABSTRACT FROM AUTHOR]