Construction of carbon-based heterostructural photocatalyst materials with high electron transfer rates is a practical and effective strategy for the mineralization of organic pollutants and removal of toxic metal ions under visible-light irradiation. This study developed a facile hydrothermal route to prepare a series of heterojunction photocatalysts, wherein Zn_xCd_1-xIn₂S₄ nanosheets were immobilized on nitrogen and phosphorus co-doped hollow carbon spheres (N, P-C) to form N, P-C@Zn_xCd_1-xIn₂S₄ nanocomposites. Comprehensive characterization of the nanocomposites revealed that the tuning of the Zn/Cd molar ratio could effectively modulate the Zn_xCd_1−xIn₂S₄ energy band structure. Moreover, Zn_0.5Cd_0.5In₂S₄ had the most negative conduction band position and loads on non-metal-doped carbon, with superior carrier transport properties and separation efficiency. N, P-C@Zn_0.5Cd_0.5In₂S₄ (N, P-C@ZCIS2) exhibited the best photocatalytic activity for tetracycline hydrochloride degradation and Cr(VI) reduction, with rate constants of 0.04822 mg⁻¹ min⁻¹ and 0.14303 min⁻¹, respectively. Notably, the photocatalysts exhibited good activity and stability even after cycle experiment. This study provides new insights into the design of carbon-based heterojunction photocatalysts for the removal of harmful chemicals.

构建具有高电子转移率的碳基异质结构光催化剂材料是在可见光照射下矿化有机污染物和去除有毒金属离子的实用有效策略。本研究开发了一种简便的水热路线来制备一系列异质结光催化剂，其中将 Zn _x Cd _{1- x} In ₂ S ₄纳米片固定在氮磷共掺杂的空心碳球（N，PC）上形成 N，PC@ Zn _x Cd _{1- x} In ₂ S ₄纳米复合材料。纳米复合材料的综合表征表明，调整 Zn/Cd 摩尔比可以有效地调节 Zn _x Cd _{1− x} In ₂ S ₄能带结构。此外，Zn _0.5 Cd _0.5 In ₂ S ₄在非金属掺杂碳上具有最负的导带位置和载荷，具有优异的载流子传输性能和分离效率。N, PC@Zn _0.5 Cd _0.5 In ₂ S ₄(N, PC@ZCIS2) 对四环素盐酸盐降解和 Cr(VI) 还原表现出最佳光催化活性，速率常数分别为 0.04822 mg ^-1 min ^-1和 0.14303 min ^-1。值得注意的是，即使在循环实验后，光催化剂也表现出良好的活性和稳定性。该研究为设计用于去除有害化学物质的碳基异质结光催化剂提供了新的见解。