Hexavalent chromium (Cr(VI)) has significantly threatened the environmental health because of its distinct toxicity. A novel magnetic core-shell structured [email protected] composite was designed for simultaneous adsorption and reduction of Cr(VI). [email protected] was synthesized by carbonization of the as-prepared core-shell structure [email protected] imidazole framework-67 (ZIF-67). After carbonization, the original ZIF-67 shell shape was preserved well with marginal parts developing to graphitized carbon. Both cobalt (Co) and NZVI nanoparticles were finely dispersed in the porous ZIF-67 derivative (ZD). [email protected] exhibited excellent removal performance for Cr(VI), owing to its high specific surface area and large pore size favorable for Cr(VI) adsorption and diffusion. The maximum adsorption capacity of [email protected] for Cr(VI) was surprisingly as high as 226.5 mg g⁻¹, surpassing the pristine ZIF-67 (29.35 mg g⁻¹) and [email protected] (36.53 mg g⁻¹). Zeta potential and X-ray photoelectron spectroscopy (XPS) spectra revealed that electrostatic attraction, reduction and precipitation might be involved in the Cr(VI) removal process by [email protected], resulting in the conversion of the adsorbed Cr(VI) to Cr(III) of lower toxicity and an eventual immobilization on the [email protected] The magnetic core-shell structured [email protected] possessed superior adsorptive reactivity for Cr(VI) to most other traditional or newly reported materials, thus should be deemed highly efficient for Cr(VI)-contaminated wastewater treatment.

六价铬（Cr（VI））由于其独特的毒性而严重威胁环境健康。设计了一种新颖的磁性核-壳结构的[电子邮件保护]复合材料，用于同时吸附和还原Cr（VI）。通过[碳化]制备的核-壳结构合成[电子邮件保护的]咪唑骨架67（ZIF-67）。碳化后，原始的ZIF-67壳形保留得很好，边缘部分发展成石墨化碳。钴（Co）和NZVI纳米颗粒均精细分散在多孔ZIF-67衍生物（ZD）中。[受电子邮件保护]由于具有较高的比表面积和较大的孔径（有利于Cr（VI）的吸附和扩散），因此对Cr（VI）的去除性能优异。^-1，超过原始的ZIF-67（29.35 mg g ^-1）和[电子邮件保护]（36.53 mg g ^-1）。Zeta电位和X射线光电子能谱（XPS）光谱表明，静电吸附，还原和沉淀可能与[电子邮件保护]去除Cr（VI）的过程有关，从而导致吸附的Cr（VI）转化为Cr （III）较低的毒性并最终固定在[电子邮件保护的]磁性核-壳结构[电子邮件保护的]对Cr（VI）的吸附活性优于大多数其他传统或新近报道的材料，因此应被认为是高效的用于Cr（VI）污染的废水处理。