文章信息/Info

Title:

Synthesis and Photocatalytic Properties of Cu2(OH)PO4-CdS Heterojunctions with Visible�睱ight Response

作者:

陳燕; 沈曉鳳; 金嫣; 張麗莎; 陳志鋼

（1. 東華大學(xué)材料科學(xué)與工程學(xué)院 纖維材料改性國(guó)家重點(diǎn)實(shí)驗(yàn)室，上海 201620) （2. 東華大學(xué)環(huán)境科學(xué)與工程學(xué)院，上海 201620)

Author(s):

CHEN Yan;  SHEN Xiaofeng;  JIN Yan1;  ZHANG Lisha;  CHEN Zhigang

(1. State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, College of Materials Science and Engineering, Donghua University, Shanghai 201620, China) (2. College of Environmental Science and Engineering, Donghua University, Shanghai 201620, China)

關(guān)鍵詞:

羥基磷酸銅; 硫化鎘; 異質(zhì)結(jié); 光催化; 亞甲基藍(lán); 四環(huán)素

Keywords:

copper hydroxyphosphate;  cadmium sulfide;  heterojunction;  photocatalysis;  methylene blue;  tetracycline

分類號(hào):

TQ174

DOI:

10.7502/j.issn.1674-3962.201712011

文獻(xiàn)標(biāo)志碼:

A

摘要:

羥基磷酸銅（Cu2(OH)PO4）作為一種可見(jiàn)光光催化劑引起了廣泛的關(guān)注。為了拓寬其可見(jiàn)光響應(yīng)范圍和提高光生載流子分離效率，設(shè)計(jì)并制備了Cu2(OH)PO4-CdS異質(zhì)結(jié)。首先通過(guò)水熱法合成了形貌均勻的核桃狀Cu2(OH)PO4，其寬度約為4 μm、長(zhǎng)度約為6 μm。隨后利用超聲法在Cu2(OH)PO4表面原位生長(zhǎng)了一些CdS納米顆粒，直徑約為25 nm。在可見(jiàn)光（λ>400 nm）下照射100 min后，Cu2(OH)PO4�睠dS對(duì)亞甲基藍(lán)（MB）和四環(huán)素（TC）的降解效率分別為82%和78%，其催化性能顯著優(yōu)于單一材料。此外，循環(huán)降解實(shí)驗(yàn)表明Cu2(OH)PO4�睠dS具有良好的穩(wěn)定性。因此，Cu2(OH)PO4-CdS異質(zhì)結(jié)有望成為一種高效、穩(wěn)定的可見(jiàn)光光催化劑并用于廢水凈化。

Abstract:

Copper hydroxyphosphate (Cu2(OH)PO4) has drawn extensive attention as an efficient visible-light-driven (VLD) photocatalyst in recent years. To further improve its photoabsorption range and photogenerated electron-hole separation efficiency, we designed and prepared Cu2(OH)PO4-CdS heterojunctions. The walnut-like Cu2(OH)PO4 with a width of ~4 μm and length of ~6 μm was synthesized by hydrothermal method at first, and then CdS nanoparticles with diameter of 25 nm were grown on the surface of Cu2(OH)PO4 by ultrasonic method. The photocatalytic activity of Cu2(OH)PO4-CdS heterojunctions were measured by the degradation of methylene blue (MB) and tetracycline (TC) solution under visible-light irradiation (λ>400 nm). The results indicated that Cu2(OH)PO4-CdS heterojunctions could degrade 82% MB or 78% TC in 100 minutes under visible-light irradiation, which is more efficient than those individual component (Cu2(OH)PO4 or CdS). In addition, the recycling experiment demonstrated that the heterojunctions remained good photocatalytic stability. Therefore, Cu2(OH)PO4-CdS was expected to be a stable and efficient VLD photocatalyst for the purification of wastewater.