A new sphere-like nano-heterostructure of Cu₃SnS₄@C (CTS@C) was well designed and fabricated by two-step hydrothermal route, which is ideally suited for synergistic physical adsorption and photodegradation of anionic dye. Compared to the pure C or CTS nanospheres, CTS@C nano-heterostructure has smaller surface area but exhibits excellent performance. It possesses high adsorption efficiency of 97.04% for removal of methyl orange (MO) at pH 5.5. And also, the superior synergistic adsorption and photodegradation performance makes it exhibit 99.38% degradation efficiency within 210 min at pH 7.5, which is about 1.8 times higher than that of simplex adsorption (56.23%). These might be attributed to the higher light harvesting, effective charge separation, lower charge-transfer resistance and high photocurrent response properties of CTS@C nanostructures. Moreover, the CTS@C nano-heterostructured photocatalyst can effectively avoid surface passivation during the process of synergistic adsorption and photodegradation, and be easily regenerated from the reaction system for recycling, suggesting a promising candidates for synergistic adsorption and photocatalysis applications.

Cu ₃ SnS _4的一种新型球状纳米异质结构@C（CTS @ C）通过两步水热路线进行了精心设计和制造，非常适合阴离子染料的协同物理吸附和光降解。与纯C或CTS纳米球相比，CTS @ C纳米异质结构具有较小的表面积，但具有出色的性能。在pH 5.5时，它具有97.04％的高吸附效率，可去除甲基橙（MO）。而且，优异的协同吸附和光降解性能使其在pH值为7.5的210分钟内显示99.38％的降解效率，是单纯吸附（56.23％）的1.8倍左右。这些可能归因于CTS @ C纳米结构的较高的光收集，有效的电荷分离，较低的电荷转移阻力和较高的光电流响应特性。此外，