当前位置: X-MOL 学术J. Nanopart. Res. › 论文详情
Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)
Noble metal-free MoS 2 -modified In 2 S 3 for excellent visible-NIR-light-driven photocatalytic of Cr 6+ removal in alkaline wastewater
Journal of Nanoparticle Research ( IF 2.1 ) Pub Date : 2020-10-22 , DOI: 10.1007/s11051-020-05057-5
Linjuan Wang , Ling Zan

MoS2-modified In2S3 (x wt.%MoS2-In2S3) samples (0 ≤ x ≤ 20) were fabricated through a facile one-pot hydrothermal process. All In2S3 samples modified by MoS2 deliver an excellent Cr6+ removal ability under visible-NIR-light-driven, and 5% MoS2-In2S3 can reduce 20 mg/L Cr6+ solution completely within 30 min with a trace photocatalyst concentration (0.27 mg/mL) which is 3.2-hold higher than that of single In2S3. Further investigations demonstrate that the loaded MoS2 can not only enhance the absorption of light scope but also promote the interfacial electron transfer from In2S3 to MoS2 and then to Cr6+, thus greatly improving the Cr6+ removal ability. ESR shows that the modifying of MoS2 can accelerate the transformation of electrons from the In2S3 to MoS2 which results in that the intensity of O2• significantly increased. PL, photocurrent, and EIS further identified that the modification of MoS2 can greatly improve the charge carrier separation efficiency. The fabricated MoS2-In2S3 samples also exhibit characteristic features such as stable and reducing Cr6+ in the weak alkaline environment for the first time, which could always be a great challenge for wastewater purification in alkaline condition.



中文翻译:

不含贵金属的MoS 2改性的In 2 S 3可在可见光,近红外光驱动下对碱性废水中的Cr 6+去除进行光催化

的MoS 2修饰的在2 š 3X%(重量)的MoS 2 -In 2 š 3)的样品(0≤  X  ≤20)通过一个浅显一锅水热法制造的。MoS 2改性的所有In 2 S 3样品在可见光-近红外光驱动下均具有出色的Cr 6+去除能力,5%MoS 2 -In 2 S 3可以在30分钟内完全还原20 mg / L Cr 6+溶液。 min时的痕量光催化剂浓度(0.27 mg / mL)比单一In 2的浓度高3.2-holdS 3。进一步的研究表明,负载的MoS 2不仅可以增强光的吸收,还可以促进界面电子从In 2 S 3到MoS 2再到Cr 6+的转移,从而大大提高了Cr 6+的去除能力。ESR表明,硫化钼的改性2可以加速电子从转化在2小号3到的MoS 2这导致的O-强度2 - •显著增加。PL,光电流和EIS进一步确定了MoS 2的修饰可以大大提高电荷载流子的分离效率。制备的MoS 2 -In 2 S 3样品还首次表现出诸如在弱碱性环境中稳定并还原Cr 6+的特征,这对于碱性条件下的废水净化总是一个巨大的挑战。

更新日期:2020-10-27
down
wechat
bug