Abstract Sun-light-driven plasmonic photocatalyst Ag/AgCl@TNT was successively synthesized by two-step hydrothermal method and followed by a photo-reduction procedure. The Ag/AgCl@TNT composites performed great adsorption and regeneration properties to high chroma dyes via coupling with the photo-degradation technique. The adsorption capacity for crystal violet (CV) solution after five cycle regeneration texts was found to be 115 mg.g−1 (reduced by 8%), which was much higher than the bare H2Ti3O7 nanotube (TNT) (27 mg.g−1), as it almost showed no renewable adsorption ability under the same condition. The excellent performance was attributed to the synergistic effect of the Ag/AgCl nanoparticles (NPs) and TNT, the TNT provided the absorption behavior with large and negatively charged surface, whereas the exposed Ag/AgCl NPs may easily get excited under sun light due to the SPR effect and charge separation mechanism. Once the excited electrons transferred to TNT, the compensative electrons may transfer from AgCl to Ag simultaneously and leave the Cl0 there in turn, thus the Ag/AgCl@TNT can exhibit a great cycle stability not only on the high chroma dyes removal but also the phenol degradation and Cr (VI) reduction, of which the removal rate were both over 95% in dozens of minutes. The TOC results verified the progressive mineralization of phenol resulting from the effective decomposition of aromatic intermediates, which indicated the great potential for practical applications in environmental remediation.

中文翻译：

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用于高效吸收再生和光催化降解的太阳光驱动等离子体 Ag/AgCl@TNT 光催化剂

摘要 采用两步水热法和光还原法连续合成了太阳光驱动的等离子体光催化剂Ag/AgCl@TNT。Ag/AgCl@TNT 复合材料通过与光降解技术耦合，对高色度染料表现出很好的吸附和再生性能。发现五次循环再生文本后结晶紫（CV）溶液的吸附容量为115 mg.g-1（减少8％），远高于裸H2Ti3O7纳米管（TNT）（27 mg.g-） 1)，因为它在相同条件下几乎没有表现出可再生的吸附能力。优异的性能归因于 Ag/AgCl 纳米粒子 (NPs) 和 TNT 的协同作用，TNT 提供了具有大且带负电荷的表面的吸收行为，而由于 SPR 效应和电荷分离机制，暴露的 Ag/AgCl NPs 在阳光下很容易被激发。一旦激发电子转移到 TNT，补偿电子可能同时从 AgCl 转移到 Ag 并依次离开 ClO，因此 Ag/AgCl@TNT 不仅在高色度染料去除方面表现出良好的循环稳定性，而且苯酚降解和Cr(VI)还原，在几十分钟内去除率均超过95%。TOC结果证实了芳香中间体有效分解导致苯酚逐渐矿化，这表明在环境修复中的实际应用潜力巨大。补偿电子可能同时从 AgCl 转移到 Ag 并依次将 Cl0 留在那里，因此 Ag/AgCl@TNT 不仅在高色度染料去除方面表现出良好的循环稳定性，而且在苯酚降解和 Cr (VI) 还原方面表现出良好的循环稳定性，其中几十分钟去除率均超过95%。TOC结果证实了芳香中间体有效分解导致苯酚逐渐矿化，这表明在环境修复中的实际应用潜力巨大。补偿电子可能同时从 AgCl 转移到 Ag 并依次将 Cl0 留在那里，因此 Ag/AgCl@TNT 不仅在高色度染料去除方面表现出良好的循环稳定性，而且在苯酚降解和 Cr (VI) 还原方面表现出良好的循环稳定性，其中几十分钟去除率均超过95%。TOC结果证实了芳香中间体有效分解导致苯酚逐渐矿化，这表明在环境修复中的实际应用潜力巨大。