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Your search keyword '"Zhao, Shuaifei"' showing total 452 results
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452 results on '"Zhao, Shuaifei"'

107. Shielding effect enables ultrafast ion transfer through nanoporous membrane for highly energy-efficient electrodialysis

Author

Lin, Jiuyang, primary, Ye, Wenyuan, additional, Xie, Shuangling, additional, Du, Jiale, additional, Liu, Riri, additional, Zou, Dong, additional, Chen, Xiangyu, additional, Yu, Zijian, additional, Fang, Shengqiong, additional, Ang, Elisa Yun Mei, additional, Toh, William, additional, Han, Dan Dan, additional, Ng, Teng Yong, additional, Seo, Dong Han, additional, Zhao, Shuaifei, additional, Bruggen, Bart Van der, additional, Xie, Ming, additional, and Lee, Young Moo, additional

Published
2022
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124. Robust bio-inspired superhydrophilic and underwater superoleophobic membranes for simultaneously fast water and oil recovery

Author

UCL - SST/IMMC/IMAP - Materials and process engineering, Fuzhou University - Fujian Provincial Engineering Research Center of Rural Waste Recycling Technology, Tianjin University - School of Chemical Engineering and Technology, Fujian Agriculture and Forestry University - Fujian Provincial Key Laboratory of Soil Environmental Health and Regulation, KU Leuven - Department of Chemical Engineering, Deakin University - Geelong, Institute for Frontier Materials, Liu, Riri, Chen, Qin, Cao, Moyuan, Lin, Jiuyang, Lin, Fang, Ye, Wenyuan, Luis Alconero, Patricia, Van der Bruggen, Bart, Zhao, Shuaifei, UCL - SST/IMMC/IMAP - Materials and process engineering, Fuzhou University - Fujian Provincial Engineering Research Center of Rural Waste Recycling Technology, Tianjin University - School of Chemical Engineering and Technology, Fujian Agriculture and Forestry University - Fujian Provincial Key Laboratory of Soil Environmental Health and Regulation, KU Leuven - Department of Chemical Engineering, Deakin University - Geelong, Institute for Frontier Materials, Liu, Riri, Chen, Qin, Cao, Moyuan, Lin, Jiuyang, Lin, Fang, Ye, Wenyuan, Luis Alconero, Patricia, Van der Bruggen, Bart, and Zhao, Shuaifei

Abstract

Designing a stable and uniform hydrophilic material for separation of oil and water is strongly desired for sustainable management of oily wastewater. Herein, a stable and uniform bio-inspired coating onto the non-woven fabric substrate with superhydrophilicity and underwater superoleophobicity via rapid co-deposition of dopamine and polyethylenimine was demonstrated. Ammonium persulfate outperformed other oxidants (e.g., Cu2+-H2O2 and NaIO4) to rapidly trigger the co-deposition of dopamine and polyethylenimine for homogeneous superhydrophilic and underwater superoleophobic surface engineering. Furthermore, the co-deposition conditions, i.e., concentration of ammonium persulfate and exposure duration, have a positive dependence on the hydrophilicity and underwater oleophobicity of the coated fabric membranes. Specifically, the superhydrophilicity and underwater superoleophobicity (underwater oil contact angle of 165.4 ± 1.1°, sliding angle of 2.5 ± 0.5°) can be obtained for the coated fabric membranes at the optimal co-deposition condition (i.e., 28.5 mmol L- 1 persulfate and coating duration of 7 h), showing a great potential in gravitational oil-water separation (permeation flux >115,000 L m-2 h-1; oil rejection >99.2%). Integrating with a superhydrophobic copper mesh, the oil-water mixed solution can be continuously and sufficiently separated, realizing simultaneous recovery of pure oil and water from oily wastewater. In addition, the bio-inspired coating displays a strong long-term chemical robustness and stability in extreme environments (i.e., acidic/alkaline solutions and oils). The study provides a facile, cost-effective and practical strategy in constructing superhydrophilic and underwater superoleophobic interfaces for sustainable treatment of oily wastewater.

Published
2021

125. Integrated loose nanofiltration-electrodialysis process for sustainable resource extraction from high-salinity textile wastewater

Author

UCL - SST/IMMC/IMAP - Materials and process engineering, Lin, Jiuyang, Chen, Qin, Huang, Xuan, Yan, Zhongsen, Lin, Xiaocheng, Ye, Wenyuan, Arcadio, Sotto, Luis Alconero, Patricia, Bi, Jinhong, Van der Bruggen, Bart, Zhao, Shuaifei, UCL - SST/IMMC/IMAP - Materials and process engineering, Lin, Jiuyang, Chen, Qin, Huang, Xuan, Yan, Zhongsen, Lin, Xiaocheng, Ye, Wenyuan, Arcadio, Sotto, Luis Alconero, Patricia, Bi, Jinhong, Van der Bruggen, Bart, and Zhao, Shuaifei

Abstract

Effective extraction of useful resources from high-salinity textile wastewater is a critical pathway for sustainable wastewater management. In this study, an integrated loose nanofiltration-electrodialysis process was explored for simultaneous recovery of dyes, NaCl and pure water from high-salinity textile wastewater, thus closing the material loop and minimizing waste emission. Specifically, a loose nanofiltration membrane (molecular weight cutoff of ~800 Da) was proposed to fractionate the dye and NaCl in the high-salinity textile wastewater. Through a nanofiltration-diafiltration unit, including a pre-concentration stage and a constant-volume diafiltration stage, the dye could be recovered from the high-salinity textile wastewater, being enriched at a factor of ~9.0, i.e., from 2.01 to 17.9 g·L−1 with 98.4% purity. Assisted with the subsequent implementation of electrodialysis, the NaCl concentrate and pure water were effectively reclaimed from the salt-containing permeate coming from the loose nanofiltration-diafiltration. Simultaneously, the produced pure water was further recycled to the nanofiltration-diafiltration unit. This study shows the potential of the integration of loose nanofiltation-diafiltration with electrodialysis for sufficient resource extraction from high-salinity textile wastewater.

Published
2021

132. Edible films and coatings for shelf life extension of mango: a review.

Author

Tavassoli-Kafrani, Elham, Gamage, Mala Villaddara, Dumée, Ludovic F., Kong, Lingxue, and Zhao, Shuaifei

Subjects
MANGO, EDIBLE coatings, MICROBIAL polysaccharides, TROPICAL fruit, MICROBIAL contamination, FRUIT, FUNCTIONAL foods
Abstract

Edible films and coatings are eco-friendly promising materials for preserving the quality and extending the shelf life of fresh and minimally-processed fruits. They can form protective layers around fruits, regulate their respiration rates, and protect them from loss of water, tissue softening, browning, and microbial contamination. Edible films and coatings have many advantages over other post-harvest treatments. They can add commercial value to fruits by enhancing their appearance, and act as carriers of functional ingredients, such as antioxidants, antimicrobial agents and nutraceuticals. Mango, a highly perishable tropical fruit, has a short post-harvest life, which limits transport to distant markets. Application of edible films and coatings on mango fruits is an effective method to preserve their quality and safety. This paper provides an overview of desirable properties for films and coatings, and recent development in different edible coatings for both fresh and minimally-processed mango. The most popular edible coating materials, such as chitosan, waxes, starch, gums, and cellulose used for mango are reviewed. The commercialization of coating formulations and equipment used for application of coatings are discussed. The environmental impacts, safety aspects, and the challenges encountered are outlined. The opportunities to use other coating materials, such as aloe-vera gel, microbial polysaccharides, and photosynthetic microorganisms are also examined. [ABSTRACT FROM AUTHOR]

Published
2022
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133. Regulating Crystal Facets of MnO 2 for Enhancing Peroxymonosulfate Activation to Degrade Pollutants: Performance and Mechanism.

Author

Fu, Juncong, Gao, Peng, Wang, Lu, Zhang, Yongqing, Deng, Yuhui, Huang, Renfeng, Zhao, Shuaifei, Yu, Zebin, Wei, Yuancheng, Wang, Guangzhao, and Zhou, Shaoqi

Subjects
CATALYSTS, POLLUTANTS, PEROXYMONOSULFATE, ELECTRON paramagnetic resonance, WASTEWATER treatment, CRYSTALS, ELECTRON paramagnetic resonance spectroscopy
Abstract

On the catalyst surface, crystal facets with different surface atom arrangements and diverse physicochemical properties lead to distinct catalytic activity. Acquiring a highly reactive facet through surface regulation is an efficient strategy to promote the oxidative decomposition of wastewater organic pollutants via peroxymonosulfate (PMS) activation. However, the mechanism through which crystal facets affect PMS activation is still unclear. In this study, three facet-engineered α-MnO2 with different exposed facets were prepared via a facile hydrothermal route. The prepared 310-MnO2 exhibited superior PMS activation performance to 100-MnO2 and 110-MnO2. Moreover, the 310-MnO2/PMS oxidative system was active over a wide pH range and highly resistant to interfering substances from wastewater. These advantages of the 310-MnO2/PMS system make it highly promising for practical wastewater treatment. Based on quenching experiments, electron paramagnetic resonance (EPR) analysis, solvent exchange, and electrochemical measurements, mediated electron transfer was found to be the dominant nonradical pathway for p-chloroaniline (PCA) degradation. A sulfhydryl group (-SH) masking experiment showed that the highly exposed Mn atoms on the 310-MnO2 surface were sites of PMS activation. In addition, density functional theory (DFT) calculations confirmed that the dominant {310} facet promoted adsorption/activation of PMS, which favored the formation of more metastable complexes on the α-MnO2 surface. The reaction mechanism obtained here clarifies the relationship between PMS activation and crystal facets. This study provides significant insights into the rational design of high-performance catalysts for efficient water remediation. [ABSTRACT FROM AUTHOR]

Published
2022
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145. Confining Nano-Fe3O4in the Superhydrophilic Membrane Skin Layer to Minimize Internal Fouling

Author

Xiong, Zhu, Huang, Yongshi, Huang, Zehui, Shi, Yiwen, Qu, Fangshu, Zhang, Gaosheng, Yang, Jingxin, and Zhao, Shuaifei

Abstract

Membrane surface fouling is often reversible as it can be mitigated by enhancing the crossflow shear force. However, membrane internal fouling is often irreversible and thus more challenging. In this study, we developed a new superhydrophilic poly(vinylidene fluoride) (P-PVDF) membrane confined with nano-Fe3O4in the top skin layer via reverse filtration to reduce internal fouling. The surface of the P-PVDF membrane confined with nano-Fe3O4had superwetting properties (water contact angle reaching 0° within 1 s), increased roughness (from 182 to 239 nm), and enhanced water affinity. The Fe3O4@P-PVDF membrane surface showed a thicker and enhanced hydration layer, which prevented foulants from approaching membrane surfaces and pores, thereby improving the rejection. For example, when 50 ppm humic acid (HA) solution was used as the feed, the removal efficiency of the Fe3O4@P-PVDF membrane was ∼67%, while the HA removal of the P-PVDF membrane was only ∼20%. The results from the resistance-in-series model showed that nanoconfinement of Fe3O4in the top skin layer of the membrane allowed foulants to accumulate on the membrane surface (i.e., surface fouling) rather than within the internal pores (i.e., internal fouling). The filtration results under crossflow fouling and cleaning confirmed that the Fe3O4@P-PVDF membrane had higher surface fouling but it was much more reversible and much lower internal fouling compared with the control membrane. Our fouling analysis offers new insights into mass transfer mechanisms of the membrane with a nanoconfinement-enhanced hydration layer. This study provides an effective strategy to develop membranes with low internal fouling propensities.

Published
2022
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