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2018 , Vol. 33 >Issue 5: 557 - 564

DOI: https://doi.org/10.15541/jim20170308

研究论文

硅藻土原位生长Nb2O5纳米棒及表面Cr(VI)吸附转化行为研究

  • 杜玉成 ,
  • 王学凯 ,
  • 侯瑞琴 ,
  • 吴俊书 ,
  • 张时豪 ,
  • 祁超
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  • 1. 北京工业大学 新型功能材料教育部重点实验室, 北京 100124;
    2. 北京特种工程设计研究院, 北京 100028

收稿日期: 2017-06-21

  修回日期: 2017-09-28

  网络出版日期: 2018-04-26

基金资助

国家重点研发计划项目(2017YFB0310804);北京市自然科学基金(2172011)

收起

In-situ Growth of Nb2O5 Nanorods on Diatomite and Highly Effective Removal of Cr(VI)

  • Yu-Cheng DU ,
  • Xue-Kai WANG ,
  • Rui-Qin HOU ,
  • Jun-Shu WU ,
  • Shi-Hao ZHANG ,
  • Chao QI
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  • 1. Key Lab of Advanced Functional Materials of Ministry of Education, College of Materials Science and Engineering, Beijing University of Technology, Beijing 100124, China;
    2. Beijing Special Engineering Design & Research Institute, Beijing 100028, China;

Received date: 2017-06-21

  Revised date: 2017-09-28

  Online published: 2018-04-26

Supported by

Project of the National Science and Technology of China (2017YFB0310804);The Beijing Natural Science Foundation (2172011)

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摘要

以活化铌酸为铌源, 草酸铵为沉积剂, 十二烷基苯磺酸钠为模板剂, 采用水热法在硅藻土表面原位生长Nb2O5纳米棒。采用SEM、TEM、XRD、BET、FT-IR和XPS等分析方法对样品进行表征, 反应14 h后, Nb2O5纳米棒长度为500~700 nm, 直径为25~35 nm; 硅藻土原位生长Nb2O5纳米棒样品比表面积为157 m2/g。研究了样品对Cr(VI)的吸附与光还原行为, 可见光条件下对Cr(VI)吸附量可达220 mg/g; 紫外光条件下, 可将表面吸附的Cr(VI)转变为Cr(III), 样品经过5次循环使用后, 对Cr(VI)(100 mg/L)降解率仍能保持在93%左右。样品可对重金属污染废水中Cr(VI)进行吸附与毒性降解一体化去除。

关键词： 硅藻土; 氧化铌纳米棒; Cr(VI); 吸附; 毒性降解

本文引用格式

杜玉成 , 王学凯 , 侯瑞琴 , 吴俊书 , 张时豪 , 祁超 . 硅藻土原位生长Nb2O5纳米棒及表面Cr(VI)吸附转化行为研究[J]. 无机材料学报, 2018 , 33(5) : 557 -564 . DOI: 10.15541/jim20170308

Abstract

Nb2O5 nanorods decorated diatomite were synthesized via a hydrothermal method by using niobic acid, ammonium oxalate and sodium dodecyl benzene sulfonate (SDBS). The as-prepared samples were characterized by SEM, TEM, XRD, BET, and FT-IR techniques. The Nb2O5 nanorod was obtained with length of 500~700 nm and diameter of 25~35 nm. BET test showed that specific surface area of Nb2O5 nanorods decorated diatomite reached 157 m2/g which show a high adsorbance tendence. Under visible light irradiation, the adsorption capacity for Cr (VI) could be 220 mg/g. With the assistance of UV-light photoreduction, the maximum removal capacity for Cr (VI) could be 340 mg/g, and the absorbed Cr(VI) was transformed to Cr(III). After photodegradation for five times, the degradation rate of Cr(VI) (100 mg/L) were still at about 93%. Nb2O5 nanorods/diatomite could adsorb Cr(VI) from sewage effectively and in the meantime accomplish the toxicity degradation, showing a promising treatment of Cr(VI) containing waste water.

Key words： diatomite; Nb2O5 nanorod; Cr(VI); adsorption; toxicity degradation

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