CHEMOSPHERE
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2022
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IF 8.943
Jie Wei,Zhiting Liu,Zehao Sun,Yunpeng Li,Chunfang Wu,Lin Zhao
Recently, the composite photocatalysts coupled with upconversion materials have received widespread attention due to higher utilization efficiency of solar energy in a wide-spectrum range. Novel heterojunction photocatalysts of CoWO 4 @NaYF 4 :Yb 3+ ,Er 3+ were designed and developed herein. The structural characterization, morphology and elemental composition analysis demonstrated that heterojunctions between CoWO 4 and NaYF 4 :Yb 3+ ,Er 3+ were indeed formed in the composite photocatalysts. Moreover, CoWO 4 @NaYF 4 :Yb 3+ ,Er 3+ heterojunction photocatalysts exhibited higher pollutants degradation efficiency. Especially, a great enhancement of +87% on the photocatalytic activity was achieved in the heterojunction photocatalyst of 60CoWO 4 –NaYF 4 :Yb 3+ ,Er 3+ compared with pure CoWO 4 . The dominant radicals generated from the heterojunction photocatalysts were confirmed as the photo-generated holes ( h + ) and hydroxyl radicals (⋅OH) through the radical species trapping experiments and fluorescence detection, which is fully in line with the expected band structure characteristics of CoWO 4 . Eventually, an underlying mechanism was proposed that the enhanced photocatalytic activity should be attributed to the wide-spectrum responsive features of CoWO 4 @NaYF 4 :Yb 3+ ,Er 3+ heterojunction photocatalysts. Within the heterostructures, CoWO 4 photocatalyst can absorb both the UV–Vis light due to its narrow bandgap and the Near-Infrared energy through the upconversion NaYF 4 :Yb 3+ ,Er 3+ , thereby utilizing solar energy more efficiently in a wide-spectrum range for photocatalytic reactions.
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PubMed
高影响因子
JOURNAL OF MEMBRANE SCIENCE
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2022
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IF 10.53
Ye Zhang,Doudou Wang,Zhixuan Huang,Haiyan Zhang,Lili Li
The exploring of sustainable, durable and superwetting composite nanofiber membrane as efficient separator for oil-water emulsion is one of the biggest challenges in the field of wastewater treatment . Herin, an environment-friendly polyurethane (bio-PU) was synthesized by introducing biodegradable polycaprolactone diol (PCL d ) segments. The superhydrophobic modified titanium carbide nanoparticle (TiC p ) by 1H,1H,2H,2H-Perfluorodecyltrimethoxysilane (PFDTS) was decorated on eletrospun bio-PU nanofiber matrix, which could also regulate the microstructure of bio-PU composite membrane . The prepared bio-PU/TiC P membrane displayed superhydrophobicity with WCA of 153.1 ± 1.2°, which attributed to its hierarchical structure composed of nanofibers, microspheres and nanoparticles. Even for oil-water emulsion, the bio-PU/TiC P membrane exhibited the outstanding separation efficiency of 99.65% and high flux of 2464.79 L m −2 h −1 . The bio-PU/TiC P membrane also had the excellent self-cleaning, water repellency and recyclability. These characters endowed it great potential application in sustainable separator.
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高影响因子
CHEMICAL ENGINEERING JOURNAL
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2022
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IF 16.744
Tianyang Cui,Wei Cai,Fukai Chu,Zhaoxin Li,Yapeng Zheng,Zhou Gui,Yuan Hu
Compared with conventional two-dimensional (2D) structure, three-dimensional (3D) solar steam generators have presented a considerably higher evaporation rate due to their structure superiority. As an emerging field, 3D printing technology has been attached by significant attention due to its feasibility and designability in the fabrication of micro-nano structures. Herein, inspired by natural light-trapping structures, a novel hierarchical structure assembled from flower-like cobalt tetroxide and 3D-printed stent is prepared. Based on the geometrical light trapping effect, both the flower-like structure in cobalt tetroxide and the hollow morphology in 3D-printed stent can significantly enhance the solar absorption and conversion efficiency through multiple reflection-incidence processes. Since the wetting direction in the cylindrical structure is always from the edge to the center, there will be a large number of salt particles at the edge of the cylinder falling by the virtue of gravity, thus achieving a high salt tolerance, and this process is illustrated by molecular dynamics simulation. Along with the rapid photo-thermal response in the solar spectrum , this 3D-printed hierarchical structure coated with flower-like cobalt tetroxide has achieved a high steam generation rate of 2.028 kg m -2 h −1 under one sun irradiation (1.0 kW/m 2 ) and excellent decontamination ability for organic dye-containing solution. Meanwhile, the desirable steam generation rate can maintain an average value of more than 1.8 kg·m -2 h −1 for long time. This 3D-printed solar evaporator is highly efficient and salt-tolerant, attributed to the enhanced geometrical light-trapping and artificial channel-array structure, presenting an effective solution for enhancing solar absorption and conversion.
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高影响因子
LANGMUIR
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2022
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IF 4.331
Yi-Xin Wang,Cheng-Ye Zhu,Feng Lu,Zi-Feng Yu,Hao-Cheng Yang,Ming Xue,Zhi-Kang Xu
Thin-film-composite (TFC) nanofiltration membranes have found wide uses in environment remediation and industrial separation. There is a growing trend to avoid the use of organic solvents and toxic chemicals during membrane fabrication. Therefore, the aqueous fabrication of TFC membranes receives considerable interest as a green and sustainable process. However, it remains challenging to construct a defect-free and ultrathin film in a homogeneous aqueous phase without the assistance of an interface. The contra-diffusion process provides a special “interface” to confine the film formation within a narrow space by regulating the competition between precursor diffusion and interfacial reactions. Herein, Fe3+/tannic acid (TA) TFC membranes were fabricated by a contra-diffusion process. The effects of fabrication parameters on the Fe3+/TA TFC membrane microstructure and performance were also investigated. The negatively charged membrane performs a competitive Na2SO4 rejection of 95.6% with a permeation flux of 44.3 L m–2 h–1 under 0.6 MPa as well as more than 99.5% rejection to several anionic dyes. The as-prepared membranes perform superior nanofiltration performance compared to other reported Fe3+/TA-based membranes, owing to the thin and defect-free selective layers by self-regulation. Moreover, the membranes exhibit stable rejection during a long-term nanofiltration test.
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高影响因子
ACS ES&T Water
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2022
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IF 0
Jian Li,Pei Xiao,Jie Yu,Lei Li,Yiyun Zhang,Yun Ma,Fei Liu,Yi Li
Nanofiltration (NF) technology is attractive in desalting and concentrating dyeing wastewater in the textile industry. A highly efficient NF membrane is critical in reducing the cost of the process. Here, a facile and reliable approach to prepare an NF membrane for the selective separation of dye/salt is proposed by surface grafting of 3-aminopropyltriethoxysilane (APTES) on a fresh polyamide (PA) layer after interfacial polymerization (IP). A thin layer of APTES with a thickness of ∼64 nm was found successfully covalently bonded onto the PA surface via esterification and amidation reactions. The thin-film composite (TFC)-1.0 membrane grafted with 10% APTES achieved a high water permeance of 44.8 L m–2 h–1 bar–1, which was 4.7 times higher than that of the control TFC membrane. Interestingly, the rejection of monovalent salt (NaCl, 11.5%) and divalent salt (Na2SO4, 17.2%) decreased significantly, while the rejection for different dyes (Congo red, reactive blue-19, Coomassie blue G-250, and methyl blue) remained over 99.0%. These noticeable changes in separation performances could be attributed to the large pore size of the active layer, resulting from the interference of APTES on the post-cross-linking of a PA network. The poly(ethylene glycol) (PEG) filtration experiments confirmed that the mean pore size of the membrane was enlarged significantly from 0.51 to 1.17 nm after surface modification. Finally, the modified membrane showed good long-term stability and excellent separation efficiencies in fractionation of a high salinity Congo red/NaCl (0.2/50 g L–1) mixture. Overall, this work provides a practical strategy to prepare a permeable and selective NF membrane for dye and salt separation by surface grafting of the nascent PA layer.
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Materials Today Communications
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2022
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IF 3.662
Kaiqiang Zhang,Yong Zhu,Yanfeng Gao
Superhydrophobic surfaces have been extensively used in antifouling, energy storage, metal corrosion and oil-water separation. However, problems caused by using organic solvents in the preparation process and poor durability still limited its application. In this paper, a kind of durable superhydrophobic (water contact angle>156°, sliding angle <10°) and superoleophilic fabrics have been fabricated based on a waterborne solution using polydimethylsiloxane, fluorosurfactant as low surface energy substances. The superhydrophobic performance of fabrics show intelligent self-healing property after plasma treatment, abrasion and machine washing for 10, 1000 and 100 cycles, respectively. Besides, the coated cotton fibers also exhibit excellent durability and long-term stability under extreme acidic/basic conditions.
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高影响因子
CHEMICAL ENGINEERING JOURNAL
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2022
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IF 16.744
Feng Gao,Lina Song,Zheming Tong,Taijiang Gui,Weiwei Cong,Kai Zhang,Xuri Wu,Quan Liu,Yongyuan Ren,Xiaoli Zhan,Qinghua Zhang
Due to their exceptional anti-adsorption efficacy against a variety of contaminants, superhydrophobic materials have received extensive interest. However, the most of them continue to suffer from mechanical fragility and low chemical stability, which severely restrict their practical applicability. Here, hierarchical structure of polymer/inorganic (HSMP) nanocomposites (NCPs) with dual crosslinking and low surface energy are designed and prepared by ultraviolet-induced polymerization strategy. Owing to the existence of crosslinking structure reduces the deformation and swelling caused by the interaction between poly(dimethysiloxane) (PDMS) and organic solvents, while the strong adhesion to substrate. The hybrid NCPs exhibit excellent superhydrophobicity and mechanical durability after 630 cycles sandpaper scratch and 1000 cycles bending. In addition, the NCPs also possessed high chemical stability under various thermal/solvent environments. Meanwhile, with the excellent flexibility and their remarkable gap between water and oil wettability, the oil/water separation studies of HSMP NCPs demonstrated over 95% separation efficiency after 50 cycles. Crucially, the produced NCPs exhibited remarkable anti-fouling properties, making them difficult to pollute in exposure conditions, which is crucial for sustainable applications.
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高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
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2022
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IF 9.136
Jie Wei,Zhiting Liu,Yanxing Zhang,Zongxian Yang,Zehao Sun,Yunpeng Li,Zhenxiang Cheng
Recently, direct Z-scheme heterojunction catalysts have become an important hotspot in photocatalytic applications due to their much stronger redox capabilities. Novel direct Z-scheme CdS@CoWO 4 spherical heterojunction photocatalysts were ingeniously designed and synthesized herein. The structural characterization and morphology analysis demonstrated that homogeneous heterojunctions between CdS and CoWO 4 were indeed formed in the composite photocatalysts. Moreover, CdS@CoWO 4 heterojunction photocatalysts exhibited excellent degradation capability towards refractory micropollutants (Pharmaceutical intermediates, dyes, and industrial additives, etc ) in wastewater. Especially, the strongest photocatalytic activity reflected by the highest reaction kinetic parameter ( k = 8.13 × 10 −2 min −1 ) was observed in the CdS-2CoWO 4 catalyst with the mass ratio of CdS:CoWO 4 = 1:2, which is nearly 4 and 58 times as high as that of pure CdS ( k = 2.21 × 10 −2 min −1 ) and CoWO 4 ( k = 1.39 × 10 −3 min −1 ), respectively. First-principles study combined with the radical species trapping experiments revealed that the charge transfer pathways and mechanisms in these heterojunctions favor the direct Z-scheme rather than the traditional Type-II mode. A key built-in electric field formed at the contact interfaces of CdS and CoWO 4 drives the Z-scheme charge transfer mechanism, which strengthens the redox capacity of photogenerated carriers and ultimately greatly enhances the photocatalytic activity of the heterojunction catalysts. It is worth applauding that CdS and CoWO 4 can form such Z-scheme heterostructures in a wide span of component ratios, which is of great benefit for their practical applications in environmental remediation.
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高影响因子
CARBOHYDRATE POLYMERS
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2022
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IF 10.723
Yan Li,Yun Liu,Ziqian Liu,Xin Wan,Hui Chen,Jinrong Zhong,Yue-Fei Zhang
Here we report an efficient strategy to separate and recycle acid blue 93 (AB93) from mixed anionic dyes selectively within sodium hydroxide activated A/CS adsorbent (N-A/CS). This work broke the common sense that the larger the specific surface area, the better the adsorption property is, which provided an alternative strategy to separate dyes. The adsorption equilibrium of AB93 could be achieved approximately within 1–2 min, and the maximum adsorption capacity was up to 2500 mg/g. Besides, it can be activated continuously and reused at least 15 times. In mixed anionic dyes, the adsorption selectivity of N-A/CS on AB93 in the mixture of AB93 and acid fuschin (AF) reached up to 99.7 %. Molecular dynamics simulation revealed that the trend of adsorption energy for dyes qualifies well with the experimental order of adsorption capacities and molecular sizes among five anionic dyes based on molecular matching effect. Thus, N-A/CS is a low-cost, easily-preparable, significantly-effective-and-reusable adsorbent, providing a promising “size-matching” strategy to adsorb multi-component dye systems.
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高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
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2022
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IF 9.136
Yuanyang Yan,Miao He,Peizhang Zhou,Xinjuan Zeng,Xiangxuan Huang,Pihui Pi,Shouping Xu,Li Wang,Xiufang Wen
Creating innovative absorbent materials with a rapid absorption rate and high absorption efficiency for viscous crude oils continues to be a global problem. Hydrophobic/oleophilic porous sorbents with light-to-heat or electric-to-heat capabilities are attractive options for crude oil clean-up, but their complicated preparation processes, poor stability, and variable weather restrict their practical usage. Herein, the light-absorbing and electrical polypyrrole and Fe 3 O 4 are introduced to endow the melamine sponge with excellent photothermal and electrothermal properties, while the polydimethylsiloxane is coated on the surface of the sponge to make it durable, compressible, and superhydrophobic. Thanks to the superior photo/electro-heat conversion capability, the temperature of the as-prepared sponge′s surface may reach 95.9 °C under solar light with 1 kW m −2 intensity or 101.4 °C under a voltage of 11 V, making it adaptable to reduce the crude oil’s viscosity and absorb it in all weather. In addition, when the sponge is exposed to sunlight and voltage at the same time, its crude oil absorption velocity is dramatically improved and is about 107 times greater than that of an unheated sponge. Based on the eco-friendly preparation method and excellent crude oil absorption performance, this work provides a promising absorbent for the recycling of spilled crude oil.
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高影响因子
JOURNAL OF HAZARDOUS MATERIALS
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2022
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IF 14.224
Zhenchao Lei,Ziyuan Huang,Yimin Lin,Yuwei Liu,Zhang Yan,Wenxiao Zheng,Huanxin Ma,Zhi Dang,Chunhua Feng
The corrosion of Fe(0) in the presence of O 2 in nature can lead to the oxidation of organic compounds, but the efficiency is very limited. Herein, attempts were made to establish a galvanic system that separates the anodic Fe(0) oxidation reaction and the cathodic O 2 reduction reaction using an air-breathing cathode. Compared with the chemical Fe(0)/O 2 system, it exhibited a substantially higher capability of destroying a variety of pollutants, such as organic dyes (12 types), phenol , nitrobenzene , acetaminophen, phenol, and ethylenediaminetetraacetic acid. The degradation rate constant of a model dye (i.e., Rhodamine B) increased from 0.047 min − 1 (chemical) to 1.412 min −1 (galvanic) under the passive air-breathing condition. The electric circuit design promoted Fe(0) dissolution to Fe(II) and triggered electron transfer that drives O 2 reduction to H 2 O 2 , two important species responsible for the generation of HO • at high abundance. In addition, the galvanic Fe(0)/O 2 system produces electricity while destroying pollutants. Tests with real Ni plating wastewater further demonstrated the capability of the system to oxidize complexed organics and phosphite. This study provides a new strategy for boosting the oxidative capacity of the Fe(0)/O 2 system, which shows promise for acid wastewater treatment .
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高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2022
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IF 5.518
Wenbin Zhang,Keyan Yang,Xiangsheng Han,Hongzhen Cai,Wenyu Lu,Yanhao Yuan,Shunyi Zhang,Feng Gao
In this work, the cellulose nanofibers based membranes with both high dye solution flux and rejection rates were obtained. The cellulose nanofibers (PPCNFs) were prepared from pomelo peels by simple H 2 O 2 oxidation process , decorated with ZIF-8 crystals, and vacuum filtrated to form composite membranes (PPCNFs@ZIF x ). Ascribing to the highly porous structures of ZIF-8, as well as their uniform and stable deposition on the surfaces of PPCNFs, the resultant membranes were mechanically strong (tensile strength up to ~72.25 MPa), surface area rich (~ 199.46 m 2 /g), and with a maximal dye solution flux of ~32.3 L m −2 h −1 bar −1 and dye rejection rates larger than 85 % (89.95 % for methyl blue , 98.83 % for methyl violet, 95.91 % for malachite green , 95.36 % for rhodamine 6 G, and a high rejection rate of ~98.6 % toward methyl violet after 30-day cycles). Thus, this work paved a simple and green way to fabricate cellulose nanofibers based membranes with high performance in the remediation of dye contaminated water.
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高影响因子
危险品化学品经营许可证（带存储）