Electrophoretic Deposition of Graphene Oxide and Reduced Graphene Oxide on the Rutile Phase of TiO2 Nanowires for Rapid Reduction of Cr (VI) under Simulated Sunlight Irradiation

被引：11

作者：

Rahmat, Subagja Toto ^{[1
]}

Alias, Nurhaswani ^{[1
]}

Kumar, Rajesh ^{[2
]}

Tan, Wai Kian ^{[3
]}

Kawamura, Go ^{[4
]}

Matsuda, Atsunori ^{[4
]}

Lockman, Zainovia ^{[1
]}

机构：

[1] Univ Sains Malaysia, Sch Mat & Mineral Resources Engn, Nanomat Niche Area, Green Elect Nano Mat Grp, Engn Campus, Nibong Tebal 14300, Malaysia

[2] Indian Inst Technol Kanpur, Dept Mech Engn, Kanpur 208016, Uttar Pradesh, India

[3] Toyohashi Univ Technol, Inst Liberal Arts & Sci, Toyohashi, Aichi 4418580, Japan

[4] Toyohashi Univ Technol, Dept Elect & Elect Informat Engn, Toyohashi, Aichi 4418580, Japan

来源：

CATALYSTS | 2022年 / 12卷 / 10期

基金：

日本学术振兴会;

关键词：

graphene oxide; reduced graphene oxide nanosheets; titanium oxide nanowires; electrophoretic deposition; photocatalysis; hexavalent chromium reduction; MICROWAVE-ASSISTED SYNTHESIS; TITANIUM-DIOXIDE; PHOTOCATALYTIC REDUCTION; ELECTRONIC-PROPERTIES; REMOVAL; CR(VI); RGO; PHOTOLUMINESCENCE; PERFORMANCE; FABRICATION;

D O I：

10.3390/catal12101282

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Hexavalent chromium is very carcinogenic, and it is, therefore, important to remove it from wastewater prior to disposal. This study reports the photoreduction of Cr(VI) under simulated sunlight using graphene-derived TiO2 nanowire (TNW) composites. Electrophoretic deposition (EPD) of graphene oxide (GO) and reduced graphene oxide (rGO) was carried out on rutile phase TNWs. The TNWs were fabricated by thermal oxidation of titanium foil in the presence of 1M potassium hydroxide mist at 750 degrees C. The TNWs uniformly covered the surface of the titanium foil. EPD of GO or rGO was done as a function of time to produce deposits of different thicknesses. The photocatalytic performances of the GO/TNWs or rGO/TNWs were tested to reduce Cr(VI) under visible light. The performance of rGO/TNWs in reducing Cr(VI) was better than GO/TNWs. A 10-second-deposited rGO on TNW samples can reduce 10 mg/L Cr(VI) within 30 min under visible light, likely as a result of the high electron transfer from rGO to TNWs accelerating the Cr(VI) reduction.

引用

页数：13