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Composite membrane consisting of molybdenum disulfide/bacterial cellulose nanofibres for osmotic energy conversion using tannic acid-assisted etching

Authors： WANG Xuying, YANG Jing, WANG Zhaoyi, ZHANG Qingxiao, FAN Yiyi, MENG Xiuxia

Units： School of Chemical Engineering, Shandong University of Technology

KeyWords： osmotic energy conversion; molybdenum disulfide; composite membrane; tannic acid; bacterial nanocellulose

ClassificationCode：TQ136.1

year,volume(issue):pagination： 2024,44(5):47-56

Abstract：

Molybdenum disulfide/bacterial cellulose nanofibres (MoS2/BNC) composites were prepared by onestep hydrothermal method. A large-size TA-MoS2/BNC nanosheets obtained by tannic acid (TA)-assisted exfoliation. The polyethersulfone (PES) supported composite membranes were successfully prepared by vacuum-assisted filtration. The tensile strength, failure stress, and yield strength of the resultant TA-MoS2/BNC composite membrane is up to 10.04 MPa, 2.38 MPa and 7.78 MPa, respectively, showing high-performance assembling. The highly Na+ ion-selective TA-MoS2/BNC composite membranes with the thickness of 870 nm produced an output power density of 8.79 W/m2 at an effective area of 7.07 mm2, which is about 207 times larger than that of the conventional testing area of 3.4×104 μm2, and captured an output power density of 14.18 W/m2 under a 100-fold salinity gradient, exceeding the reported membrane. These provide a strong guarantee of efficient conversion of osmotic energy for MoS2based membrane.

Funds：

国家自然科学基金项目（21978157）; 山东省自然科学基金项目(ZR2022QB147, ZR2023MB093)

AuthorIntro：

王旭颖（1998-），女，山东淄博人，硕士生，从事二维膜材料渗透能转换发电研究.*通讯作者，E-mail: mengxiux@sdut.edu.cn

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