Research in material chemistry is inspiring scholars across the globe in designing multifunctional materials to fight against energy and environmental issues. In this view, the present work defines functionalization of polyaniline (PANI) with boroncarbonitride (BCN) through in-situ polymerization that gives multifunctional hybrid (BCN@PANI) material. The synthesized materials, PANI, BCN and BCN@PANI are subjected to morphological and structural characterization using various techniques. These materials are utilized for the photocatalytic evolution of hydrogen, removal of Malachite green (MG; organic pollutant) synthetic dye and Cr(VI) (inorganic pollutant) from aqueous solution. Enhanced activity of BCN@PANI hybrid has been observed for hydrogen evolution (12.3 mmolg⁻¹) when compared to pure PANI (1.2 mmolg⁻¹) and pristine BCN (6 mmolg⁻¹). The same trend has been observed for the photocatalytic removal of MG, where the complete decolouration was achieved within 90 min under sunlight and degradation efficiency was found to be 94 %. The photocatalytic reduction of Cr(VI) was achieved successfully by BCN@PANI hybrid material and the efficiency was found to be 78 % in a time of 2 h. The plausible mechanism of photocatalysis has been given on the basis of ESR spectroscopic analysis. The BCN@PANI hybrid could serve as a material of choice for the photocatalysis studies as it is having good stability and recyclability.

材料化学研究正在激发全球学者设计多功能材料来应对能源和环境问题。在这种观点下，本工作通过原位聚合定义了聚苯胺（PANI）与碳氮化硼（BCN）的功能化，从而得到了多功能杂化（BCN @ PANI）材料。使用各种技术对合成材料PANI，BCN和BCN @ PANI进行形态和结构表征。这些材料可用于氢的光催化释放，从水溶液中去除孔雀石绿（MG；有机污染物）合成染料和Cr（VI）（无机污染物）。观察到BCN @ PANI杂合体的活性增强，释放出氢气（12.3 mmolg ^-1）与纯PANI（1.2 mmolg ^-1）和原始BCN（6 mmolg ^-1）进行比较。对于MG的光催化去除，观察到了相同的趋势，其中在阳光下90分钟内完成了完全脱色，发现降解效率为94％。通过BCN @ PANI杂化材料成功实现了Cr（VI）的光催化还原，在2小时内发现效率为78％。在ESR光谱分析的基础上，给出了光催化的合理机理。BCN @ PANI杂化物具有良好的稳定性和可回收性，因此可以作为光催化研究的首选材料。