一步富氧煅烧法制备长可见光吸收的WO3及其水氧化性能

硅酸盐通报 ›› 2021, Vol. 40 ›› Issue (7): 2380-2387.

一步富氧煅烧法制备长可见光吸收的WO₃及其水氧化性能

李东¹, 李瑞¹, 吴发超², 高彩云^2,3

1.北方民族大学材料科学与工程学院,银川 750021;
2.北方民族大学化学与化学工程学院,银川 750021;
3.北方民族大学,国家民委化工技术基础重点实验室,银川 750021

收稿日期:2021-01-22 修回日期:2021-03-22 出版日期:2021-07-15 发布日期:2021-08-04
通讯作者: 高彩云,博士,讲师。E-mail:caiyunfei_520@163.com
作者简介:李东(1984—),男,博士,讲师。主要从事光/光电催化的研究。E-mail:lidong191228@163.com
基金资助:
北方民族大学2019年重点科研项目(2019KJ02);宁夏自然科学基金(2021AAC03170,2019AAC03112)

Preparation and Performance of WO₃ with Long Visible Light Absorption by One-Step Oxygen Enriched Calcination Method for Water Oxidation

LI Dong¹, LI Rui¹, WU Fachao², GAO Caiyun^2,3

1. School of Material Science and Engineering, North Minzu University, Yinchuan 750021, China;
2. Chemical Scienceand Engineering College, North Minzu University, Yinchuan 750021, China;
3. Key Laboratory for Chemical Engineering and Technology, State Ethnic Affairs Commission, North Minzu University, Yinchuan 750021, China

Received:2021-01-22 Revised:2021-03-22 Online:2021-07-15 Published:2021-08-04

摘要/Abstract

摘要： 三氧化钨(WO₃)仅对460 nm以下波长的太阳光有响应,大大限制了其对太阳光的利用率。因此,如何拓宽WO₃的光谱响应范围是当前的研究重点。本文以仲钨酸铵[(NH₄)₁₀H₂W₁₂O₄₂·xH₂O]为前驱体,通过一步富氧煅烧法制备了具有宽光谱可见光响应能力的N₂插入的纳米WO₃(N₂-WO₃)。通过XRD、SEM、EDS、UV-Vis DRS、Raman等表征测试方法,研究了N₂插入对WO₃结构和性能的影响。结果表明:N₂插入有效地窄化了N₂-WO₃的禁带宽度(2.25 eV),较纯WO₃(2.76 eV)减小了0.51 eV;N含量对N₂-WO₃的可见光吸收能力有显著影响,且随着煅烧温度的升高N含量呈减小趋势。入射光子-电流转换效率(IPCE)的测试结果表明,N₂-WO₃可以对520 nm以下的可见光产生响应。光催化测试结果表明,N₂-WO₃的光催化活性优于纯WO₃。

关键词: 富氧煅烧, 氮气插入, 三氧化铝, 光电催化, 光催化, 纳米材料

Abstract: Tungsten trioxide (WO₃) only responds to sunlight below 460 nm, which greatly limits its utilization for sunlight. Therefore, the current research is focusing on broadening the spectral response range of WO₃. In this paper, nitrogen intercalated WO₃ (N₂-WO₃) with wide spectrum visible light response was prepared by one-step oxygen enriched calcination method using ammonium paratungstate [(NH₄)₁₀H₂W₁₂O₄₂·xH₂O] as precursor. The effects of N₂ insertion on the structure and properties of WO₃ were investigated by XRD, SEM, EDS, UV-Vis DRS and Raman. The results show that N₂ insertion effectively narrows the band gap (2.25 eV) of N₂-WO₃, which is 0.51 eV less than that of pure WO₃ (2.76 eV); the N content has a significant effect on the visible light absorption capacity of N₂-WO₃, and the N content decreases with the increase of calcination temperature. The measurement results of incident photon current conversion efficiency (IPCE) show that N₂-WO₃ responds to visible light below 520 nm. The results of photocatalytic oxygen evolution show that the photocatalytic activity of N₂-WO₃ is better than that of pure WO₃.

Key words: oxygen enriched calcination, nitrogen intercalation, tungsten trioxide, photoelectrocatalysis, photocatalysis, nanomaterial

中图分类号:

李东, 李瑞, 吴发超, 高彩云. 一步富氧煅烧法制备长可见光吸收的WO₃及其水氧化性能[J]. 硅酸盐通报, 2021, 40(7): 2380-2387.

LI Dong, LI Rui, WU Fachao, GAO Caiyun. Preparation and Performance of WO₃ with Long Visible Light Absorption by One-Step Oxygen Enriched Calcination Method for Water Oxidation[J]. BULLETIN OF THE CHINESE CERAMIC SOCIETY, 2021, 40(7): 2380-2387.

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一步富氧煅烧法制备长可见光吸收的WO₃及其水氧化性能

Preparation and Performance of WO₃ with Long Visible Light Absorption by One-Step Oxygen Enriched Calcination Method for Water Oxidation

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