文章信息/Info

Title:

NiOx Nanosheets Decorated Cotton Fabric for Seawater Evaporation

文章編號:

1674-3962(2025)07-0605-09

作者:

劉岐躍; 孟茹茹; 朱波; 陳志鋼; 蔣偉忠; 余諾

東華大學材料科學與工程學院 纖維材料改性國家重點實驗室，上海 201620

Author(s):

LIU Qiyue;  MENG Ruru;  ZHU Bo;  CHEN Zhigang;  JIANG Weizhong;  YU Nuo

State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, College of Materials Science and Engineering,Donghua University, Shanghai 201620, China

關鍵詞:

氧化鎳納米片; 界面蒸發; 抗析鹽; 太陽能; 海水淡化

Keywords:

nickel oxide nanosheets;  interfacial evaporation;  salt�瞨esistance;  solar energy;  seawater desalination

分類號:

P747；TB383

DOI:

10.7502/j.issn.1674-3962.202401001

文獻標志碼:

A

摘要:

太陽能驅動的海水淡化有望緩解淡水資源短缺問題，吸引了高度關注。但目前還存在光熱材料光吸收效果不理想、表面易析鹽以及制備工藝復雜等問題。為解決以上問題，采用簡單的化學浴沉積法在棉織物(cotton fabric,CF)表面生長具有氧缺陷的氧化鎳(NiOx)納米片。NiOx納米片均勻覆蓋在棉纖維表面，與纖維共同形成了多級微/納結構，使得CF/NiOx光熱織物在350～2500 nm范圍內的光吸收率高達96.6%。利用 CF/NiOx光熱織物構筑傾斜式海水蒸發器，在模擬太陽光(光強1 kW·m-2)照射下，CF/NiOx的蒸發速率最高達1.84 kg·m-2·h-1，濃縮的鹵水會在重力作用下在織物底端滴落。連續蒸發20 h后，光熱織物表面沒有鹽顆粒析出，并且蒸發器的蒸發性能沒有明顯衰減。因此，CF/NiOx光熱織物表現出優異的太陽能海水淡化性能和長期穩定性，有望推動太陽能海水淡化技術走向實際應用。

Abstract:

Solar-driven seawater desalination technology has attracted great attention considering its potential to alleviate the shortage of fresh water resources.However, there are still some issues such as inefficient light absorption of photothermal materials, salt accumulation and complex fabrication processes. To address these problems, a simple chemical bath deposition method was used to grow nickel oxide nanosheets with oxygen deficiency (NiOx) on the cotton fabric (CF) surface. The NiOx nanosheets are uniformly coated on the surface of cotton fibers, forming a hierarchical microstructure together with fibers, resulting in high light absorption efficiency of CF/NiOx fabric in a broad wavelength range of 350 to 2500 nm, as high as 96.6%. Based on the CF/NiOx fabric, a tilted solar evaporator was constructed. Under simulated sunlight (light intensity: 1 kW·m-2), the evaporation rate of CF/NiOx is 1.84 kg·m-2·h-1, and the concentrated seawater drips off at the bottom of the fabric due to gravity. After 20 h continuous evaporation, no salt particles appear on the surface of the photothermal fabric, and there is no significant degradation in the evaporator’s performance. Therefore, CF/NiOx fabric demonstrates excellent evaporation performance and long-term stability, which is expected to promote solar desalination technology to practical application.