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Bi-2MoO-6可見光催化去除4BS染料實驗研究
摘要: 以Bi(NO_3)_3·5H_2O和(NH_4)_6M_o7O_(24)·4H_20為原料,采用預(yù)超聲-水熱法合成可見光催化劑Bi_2MoO_6,考察了在可見光催化條件下,催化劑的用量、污染物初始濃度、溶液pH值等因素對偶氮染料直接耐酸大紅4BS去除效果的影響.結(jié)果表明,4Bs溶液初始濃度為20mg·l~(-1)、原始pH值6.90條件下,催化劑的最佳投加量為2g·l~(-1),光照60min后,4BS去除率達到92.7%;在實驗濃度20-100mg·l~(-1)的范圍內(nèi),催化劑投加量為2.0g·l~(-1),光照210min后染料去除量最大可達到約50mg·l~(-1),溶液在弱酸或弱堿性條件下脫色較為穩(wěn)定,在強酸或強堿性條件下脫色較快,效果明顯;催化劑重復(fù)使用前后結(jié)構(gòu)和成分穩(wěn)定,但光催化活性有所下降. Abstract: Visible-light-driven Bi_2MoO_6 photocatalyst was prepared by hydrothermal process with previously ultrasonic treatment. The effects of photocatalytic activity of Bi_2MoO_6 catalyst were evaluated by the decoloration of aqueous 4BS dye at room temperature under visible light irradiation. When the concentration of the aqueous 4BS dye was 20mg·l~(-1) at the initial pH 6.90 , the best dosage of Bi_2MoO_6 catalyst was 2g·l~(-1), and the removal rate was 92.7% after 60min. The structure and composition of Bi_2MoO_6 catalyst was stable after use of five times, but photocatalytie activity declined. 作 者: 陳亞 陳建林 姚三麗 周懿 許岳泰 CHEN Ya CHEN Jian-lin YAO San-li ZHOU Yi XU Yue-tai 作者單位: 南京大學(xué)環(huán)境學(xué)院,污染控制與資源化研究國家重點實驗室,南京,210093 期 刊: 環(huán)境化學(xué) ISTICPKU Journal: ENVIRONMENTAL CHEMISTRY 年,卷(期): 2009, 28(6) 分類號: X13 關(guān)鍵詞: Bi_2MoO_6 預(yù)超聲-水熱合成 光催化 4BS. Keywords: Bi_2MoO_6 hydrothermal synthesis with previously ultrasonic treatment photocatalysis 4BS.【Bi-2MoO-6可見光催化去除4BS染料實驗研究】相關(guān)文章:
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