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Dual Functions of a Au@AgNP-Incorporated Nanocomposite Desalination Membrane with an Enhanced Antifouling Property and Fouling Detection Via Surface-Enhanced Raman Spectroscopy
ACS Applied Materials & Interfaces ( IF 8.3 ) Pub Date : 2021-09-16 , DOI: 10.1021/acsami.1c15948 Shixin Zhang 1, 2 , Durga P Acharya 2 , Xiaomin Tang 2, 3 , Huaili Zheng 1 , Guang Yang 2 , Derrick Ng 2 , Zongli Xie 2
ACS Applied Materials & Interfaces ( IF 8.3 ) Pub Date : 2021-09-16 , DOI: 10.1021/acsami.1c15948 Shixin Zhang 1, 2 , Durga P Acharya 2 , Xiaomin Tang 2, 3 , Huaili Zheng 1 , Guang Yang 2 , Derrick Ng 2 , Zongli Xie 2
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Membrane fouling has remained a major challenge limiting the wide application of membrane technology because it reduces the efficiency and shortens the lifespan of the membrane, thus increasing the operation cost. Herein we report a novel dual-function nanocomposite membrane incorporating silver-coated gold nanoparticles (Au@AgNPs) into a sulfosuccinic acid (SSA) cross-linked poly(vinyl alcohol) (PVA) membrane for a pervaporation desalination. Compared with the control PVA membrane and PVA/SSA membrane, the Au@AgNPs/PVA/SSA membrane demonstrated a higher water flux and better salt rejection as well as an enhanced antifouling property. More importantly, Au@AgNPs provided an additional function enabling a foulant detection on the membrane surface via surface-enhanced Raman spectroscopy (SERS) as Au@AgNPs could amplify the Raman signals as an SERS substrate. Distinct SERS spectra given by a fouled membrane helped to distinguish different protein foulants from their characteristic fingerprint peaks. Their fouling tendency on the membrane was also revealed by comparing the SERS intensities of mixed foulants on the membrane surface. The Au@AgNPs/PVA/SSA nanocomposite membrane presented here demonstrated the possibility of a multifunction membrane to achieve both antifouling and fouling detection, which could potentially be used in water treatment.
中文翻译：
Au@AgNP 纳米复合海水淡化膜的双重功能，具有增强的防污性能和通过表面增强拉曼光谱进行污垢检测
膜污染仍然是限制膜技术广泛应用的主要挑战，因为它降低了效率并缩短了膜的使用寿命，从而增加了运行成本。在此，我们报道了一种新型双功能纳米复合膜，将银包金纳米颗粒（Au@AgNPs）掺入磺基琥珀酸（SSA）交联聚（乙烯醇）（PVA）膜中，用于渗透蒸发海水淡化。与对照PVA膜和PVA/SSA膜相比，Au@AgNPs/PVA/SSA膜表现出更高的水通量和更好的脱盐率以及增强的防污性能。更重要的是，Au@AgNPs 提供了额外的功能，可以通过表面增强拉曼光谱 (SERS) 检测膜表面的污染物，因为 Au@AgNPs 可以作为 SERS 底物放大拉曼信号。污染膜给出的独特 SERS 光谱有助于区分不同的蛋白质污染物及其特征指纹峰。通过比较膜表面混合污染物的 SERS 强度，也揭示了它们在膜上的污染倾向。本文提出的 Au@AgNPs/PVA/SSA 纳米复合膜证明了多功能膜实现防污和污垢检测的可能性，可用于水处理。
更新日期：2021-09-29
中文翻译：
Au@AgNP 纳米复合海水淡化膜的双重功能，具有增强的防污性能和通过表面增强拉曼光谱进行污垢检测
膜污染仍然是限制膜技术广泛应用的主要挑战，因为它降低了效率并缩短了膜的使用寿命，从而增加了运行成本。在此，我们报道了一种新型双功能纳米复合膜，将银包金纳米颗粒（Au@AgNPs）掺入磺基琥珀酸（SSA）交联聚（乙烯醇）（PVA）膜中，用于渗透蒸发海水淡化。与对照PVA膜和PVA/SSA膜相比，Au@AgNPs/PVA/SSA膜表现出更高的水通量和更好的脱盐率以及增强的防污性能。更重要的是，Au@AgNPs 提供了额外的功能，可以通过表面增强拉曼光谱 (SERS) 检测膜表面的污染物，因为 Au@AgNPs 可以作为 SERS 底物放大拉曼信号。污染膜给出的独特 SERS 光谱有助于区分不同的蛋白质污染物及其特征指纹峰。通过比较膜表面混合污染物的 SERS 强度，也揭示了它们在膜上的污染倾向。本文提出的 Au@AgNPs/PVA/SSA 纳米复合膜证明了多功能膜实现防污和污垢检测的可能性，可用于水处理。
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