CHEMICAL ENGINEERING JOURNAL
·
2023
·
IF 15.1
Jie Ren,Hongbo Xia,Yue Wu,Yaqun Han,Shufen Zhang,Suli Wu
Mie resonant structural colors have recently emerged as a promising approach for large-scale and high-precision material appearance design to replace plasmonic structures. However, Mie resonant structural colors are still limited in the gamut of red because high-order multipoles such as electric and magnetic quadrupoles (EQ, MQ) usually exist in blue band when the electric dipole (ED) and magnetic dipole (MD) located in red band. Here we achieved pure red Mie resonant structural color based on ZnO spheres. Both simulation and experimental results proved that the dipole resonance and quadrupole resonance can be separated effectively by decreasing the refractive index of the resonator. By comparing different materials, ZnO is the most suitable material to generate a pure red color. Further, by controlling the distance of ZnO spheres on the substrate, high-order multipole resonance was inhibited completely and pure red Mie resonant structural color was achieved. In addition, by tuning the size of ZnO spheres, bright purple, blue, green, yellow, orange, and red colors were also realized. Finally, complex patterns can be easily made by the spraying method. This work opens new perspectives on full-color Mie resonant structural colors.
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高影响因子
CARBON
·
2023
·
IF 10.9
Lizhen Hu,Jiayou Liu,Xiaoxiang Huang,Qianqian Nie,Penglei Liu,Zhongchao Tan,Hesheng Yu
Using nanoclusters and single atoms with unique activity to replace nanoparticles is a promising strategy to enhance catalyst activity. However, stable loading of nanoclusters and single atoms remain a challenge. This paper reports atomically dispersed Pt bridged with metal-organic framework (MOF)-derived ZnO/C through carbon atoms (Pt–ZnO/C), by impregnation combined with calcination , for photocatalytic oxidation of NO. The MOF-derived ZnO/C has a larger specific surface area than pure ZnO. The presence of C enhances the visible light absorption, promotes the migration of photogenerated carriers , and more importantly facilitates the stabilization of Pt single atoms through Pt–C interactions. The Pt species present in the Pt–ZnO/C catalysts in the form of single atoms and nanoclusters. The Pt–ZnO/C catalysts show high NO conversion rates and selectivity towards NO 3 − /NO 2 − ions formation. Specifically, the NO conversion rate of 81.9% is much higher than those of ZnO/C (31.4%) and Pt nanoparticles loaded ZnO/C (Pt NPs-ZnO/C, 58.6%). In addition, the selectivity of NO 3 − /NO 2 − (i.e., 98.6%) formation over the Pt–ZnO/C catalyst is much higher than that of NO 2 (i.e., 1.4%). Furthermore, the photocatalysis tests and ESR results suggest that the Pt single atoms and nanoclusters can enhance the oxidation of NO by promoting the production of O 2 •- and OH • . The DFT results also reveal that single Pt atoms promote the adsorption of O 2 and H 2 O to form O 2 •- and OH • . More importantly, OH • can promote the selective oxidation of NO to NO 3 − /NO 2 − ions. In addition, the projected density of states of single Pt atoms loaded on the ZnO/C catalysts show that the presence of C atom bridge favors the stability of single Pt atoms because of the interaction between C and Pt atoms. This work provides a new strategy for the design of single-atom-loaded metal oxide catalysts.
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2023
·
IF 9.9
Lifang Yang,Jiangju Si,Liang Liang,Yunfei Wang,Li Zhu,Zizhong Zhang
Photocatalytic water splitting has been identified as a promising solution to tackle the current environmental and energy crisis in the world. However, the challenge of this green technology is the inefficient separation and utilization of photogenerated electron-hole pairs in photocatalysts. To overcome this challenge in one system, a ternary ZnO/Zn 3 In 2 S 6 /Pt material was prepared as a photocatalyst using a stepwise hydrothermal process and in-situ photoreduction deposition. The integrated S-scheme/Schottky heterojunction in the constructed ZnO/Zn 3 In 2 S 6 /Pt photocatalyst enabled it to exhibit efficient photoexcited charge separation/transfer. The evolved H 2 reached up to 3.5 mmol g -1 h - 1 . Meanwhile, the ternary composite possessed a high cyclic stability against photo-corrosion under irradiation. Practically, the ZnO/Zn 3 In 2 S 6 /Pt photocatalyst also showed great potential for H 2 evolution while simultaneously degrading organic contaminants like bisphenol A. It is hoped in this work that the incorporation of Schottky junctions and S-scheme heterostructures in the construction of photocatalysts would lead to accelerated electron transfer and high photoinduced electron-hole pair separation, respectively, to synergistically enhance the performance of photocatalysts.
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高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
·
2022
·
IF 24.319
Minxian Zhang,Xuecong Lin,Ziran Yi,Xiang Xu,Jingling Yang,Mingshan Zhu
Through visible light driven ligand-to-metal charge transfer (LMCT) with organic pollutant-semiconductor is a new method to promote reactive oxygen species (ROS) generation in water treatment. This study is the first time to use ciprofloxacin (CIP) pollutants induced LMCT on ZnO mesocrystal with rich oxygen vacancies (M-ZnO-OV) to improve ROS generation for CIP self-degradation. The results show an obviously increased intensity of HO • and O 2 •− through the LMCT process, leading to the optimal kinetic rate constant of 0.043 min –1 for CIP degradation, which is 7.5 times that of ZnO non-LMCT process. The presence of oxygen vacancies (OVs) in M-ZnO-OV leads to an electron-deficient Zn atom nearby OVs, promoting the formation of LMCT complex, and then resulting in rapid electron transfer from OVs to oxygen in water to generate ROS. The present investigation provides a new OVs-enhanced LMCT process to improve the concentration of ROS for water treatments.
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2022
·
IF 9.965
Xiaoyin Cao,Lijuan Yang,Lijuan Yan,Zhaoqi Zhu,Hanxue Sun,Weidong Liang,Jiyan Li,An Li
Phase change materials (PCMs) with ideal light-to-thermal conversion efficiency play an important role in solar energy storage and conversion . Hence, we report the fabrication of a novel composite PCMs (CPCMs) device based on ZnO nanorods deposited indium tin oxide (ITO) glass loading with fatty amines. ZnO nanorods were deposited on the ITO glass using a three-electrode electrodeposition method, and 1-Hexadecylamine (HDA) was loaded on the ITO glass via spin-coating, followed by spraying polypyrrole (ppy) on the surface of CPCM device to improve thermal conductivity and solar absorption. The as-prepared CPCM device exhibits excellent light-to-thermal conversion efficiency, achieving a high conversion efficiency of 90.2% obtained at 1sun owing to its high light absorption (80%), enhanced thermal conductivity (improved by 57.8%), and the unique vertical aligned nanorods structure which could significantly decrease tortuosity, thereby reducing thermal route and lowering thermal response time. Furthermore, the electro-to-thermal conversion efficiency of the CPCMs device has also been investigated and the results show that it can reach up to 69.8% under a low voltage of 5 V, indicating that the CPCM device has a high potential in the field of electro-to-thermal conversion. Based on the benefits listed above, the CPCM device may serve an ideal platform for a wide range of solar energy storage and conversion applications.
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高影响因子
Catalysis Science & Technology
·
2022
·Vol. 13
·期 2
·426-436
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IF 6.177
Ru Wang,Xiaoyu Xie,Chunxiang Xu,Rendong Ji,Zengliang Shi,Qiannan Cui,Mingliang Wang
Semiconductor-based photocatalysis is of great practical significance to degrade persistent organic pollutants (POPs). However, it still faces challenges and always in pursuit to construct a photocatalyst system with efficient charge separation and strong redox capacity. Herein, a Z-scheme energy band configuration in a hierarchical heterostructure composed of two-dimensional (2D) ZnIn2S4 nanosheets and zero-dimensional (0D) ZnO nanoparticles was fabricated for the degradation of tetracycline (TC)—one of the typical POPs. On the one hand, the Z-scheme heterojunction inhibits the recombination of charge carriers and preserves the strong redox capacity of ZnIn2S4 and ZnO. On the other hand, the hierarchical microstructure and the 2D/0D subunits endow the ZnIn2S4/ZnO photocatalyst with good light harvesting, intimate interface contact, and short charge transfer. As a result, the hybrid photocatalyst exhibited a high reaction rate constant of 0.074 min−1 for TC degradation, which is 5.4 and 2.8 times that of the pure ZnIn2S4 and ZnO, respectively. This work provides new insight into the integration of energy band engineering and morphology modulation to design advanced photocatalytic systems for POP treatment.
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FOOD RESEARCH INTERNATIONAL
·
2022
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IF 7.425
Min Lu,Qi Zhou,Hui Yu,Xiaoe Chen,Gaofeng Yuan
Chitosan/gelatin (CG) based intelligent pH-sensing indicator films were fabricated by incorporating zinc oxide nanoparticles (nano-ZnO) (CGZ) and different amounts of black peanut seed coat anthocyanins (BPCSA) (CGZ-h). Chitosan/gelatin showed good compatibility with anthocyanins and nano-ZnO, and the addition of nano-ZnO and BPSCA did not affect the original crystal structure of films. Addition with BPSCA simultaneously increased the tensile strength and elongation at break of CGZ-h films. BPSCA decreased the water vapor permeability, whereas they increased the UV barrier property of the CGZ-h films. CGZ-h films exerted strong antioxidant and antibacterial activities, which mainly attributed to the BPSCA and nano-ZnO, respectively. CGZ-h films presented good pH-sensing color-change properties in different buffer solutions. The CGZ-h2 film was used to monitor the freshness of shrimp at 4 °C. The result showed that distinctive color change of the CGZ-h2 film was highly correlated with the change of the total volatile basic nitrogen, pH and total viable count of shrimp. These results revealed the potential application of CGZ-h for real-time monitoring the freshness of food.
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ACS Omega
·
2022
·
IF 4.132
Bo Zhang,Jing Wang,Qufu Wei,Pingping Yu,Shuai Zhang,Yin Xu,Yue Dong,Yi Ni,Jinping Ao,Yi Xia
Oxygen vacancy (VO) is a kind of primary point defect that extensively exists in semiconductor metal oxides (SMOs). Owing to some of its inherent qualities, an artificial manipulation of VO content in one material has evolved into a hot research field, which is deemed to be capable of modulating band structures and surface characteristics of SMOs. Specific to the gas-sensing area, VO engineering of sensing materials has become an effective means in enhancing sensor response and inducing light-enhanced sensing. In this work, a high-efficiency microwave hydrothermal treatment was utilized to prepare a VO-rich ZnO sample without additional reagents. The X-ray photoelectron spectroscopy test revealed a significant increase in VO proportion, which was from 9.21% in commercial ZnO to 36.27% in synthesized VO-rich ZnO possessing three-dimensional and air-permeable microstructures. The subsequent UV–vis–NIR absorption and photoluminescence spectroscopy indicated an extension absorption in the visible region and band gap reduction of VO-rich ZnO. It turned out that the VO-rich ZnO-based sensor exhibited a considerable response of 63% toward 1 ppm HCHO at room temperature (RT, 25 °C) under visible light irradiation. Particularly, the response/recovery time was only 32/20 s for 1 ppm HCHO and further shortened to 10/5 s for 10 ppm HCHO, which was an excellent performance and comparable to most sensors working at high temperatures. The results in this work strongly suggested the availability of VO engineering and also provided a meaningful candidate for researchers to develop high-performance RT sensors detecting volatile organic compounds.
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PROGRESS IN ORGANIC COATINGS
·
2022
·
IF 6.206
Kai Xing,Qinsheng Chen,Jixing Lin,Zunying Hu,Zhongxu Li,Jiayi Chen,Xueer Xu,Changdong Gu,Jiangping Tu
Polycaprolactone (PCL) based polymers are usually considered as potential coating materials for improve corrosion resistance of biodegradable magnesium alloy due to excellent mechanical property and biocompatibility. However, as for the quality and stability of the polymer-based coatings, the interfacial adhesion of polymer coating to magnesium substrate and the antibacterial ability should not be ignored. Herein, to improve the interfacial adhesion of PCL based coating, a MgO/MgCO 3 transition layer was prepared on the biodegradable WE43 magnesium alloy by a facile chemical conversion process in a deep eutectic solvent-based ionic liquid . Moreover, ZnO nanoparticles were loaded in the PCL to form a PCL/ZnO coating on the transition layer to further enhance corrosion resistance, biocompatibility, and antibacterial activity of the magnesium alloy substrate. Electrochemical corrosion test and in vitro biocompatibility tests, including cytotoxicity and antibacterial activity, were performed in a simulated body environment, which showed that the substrate covered by the double-layered coating possesses good corrosion resistance, biocompatibility and antibacterial ability.
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CHEMICAL ENGINEERING JOURNAL
·
2022
·
IF 16.744
Xiang Gong,Li Tang,Ruixiang Wang,Zhenghong Guo,Pengling Huang,Li Zhou,Jie Zou,Jia Lei,Huanhuan Liu,Nan Li,Xingrui Tang,Wenkun Zhu,Rong He
As an important strategic resource and environmental pollutant, uranium has high toxicity and economic value. Photocatalytic reduction of soluble hexavalent uranium (U(VI)) is a green and economic method to achieve uranium extraction, whereas the reported photocatalyst commonly requires a long period of > 1 h to reach a high extraction efficiency (>90%). Herein, we reported the ultrafast photocatalytic uranium extraction by up-conversion Er doped ZnO nanosheets . In the initial U(VI) concentration of 200 mg/L, the Er doped ZnO with 4% doping level (Er 0.04 -ZnO) nanosheets achieved 91.8% within 3 min, which was at least a magnitude shorter relative to ever-reported materials. The Er 0.04 -ZnO nanosheets reached a high removal efficiency of 96.1% in 10 min, with a considerable U(VI) extraction capacity of 3036 mg/g. The mechanistic study showed that the Er doping induced the up-conversion properties and increases the carrier density, thus enhancing the light adsorption and accelerating the U(VI) extraction.
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APPLIED CATALYSIS A-GENERAL
·
2022
·
IF 5.723
Fanchao Zeng,Yongxia Zhu,Baofang Jin,Yongjun Ji,Lei Shi,Guangwen Xu,Dongxing Fu,Ziyi Zhong,Fabing Su
Multi-component promoters may efficiently improve the catalytic performance of the primary Cu-based catalysts in the Rochow-Müller reaction, but this approach is not well explored, and the roles of the promoters are not very clear. Herein, we report the ZrO 2 -supported CuO catalyst (CuO/ZrO 2 ) modified with a co-promoter of ZnO, Sn, and CuP prepared by a simple dry ball-milling method. The co-promoter could significantly increase the amount of surface adsorbed oxygen and improve the reducing ability of catalysts, facilitating the formation of the active Cu 3 Si phase and further advancing dimethyldichlorosilane ((CH 3 ) 2 SiCl 2 , M2) selectivity and Si conversion in the Rochow-Müller reaction. Compared to the state-of-the-art commercial catalyst, these CuO/ZrO 2 catalysts with the co-promoters all showed enhanced catalytic activity. Especially, the CuO/ZrO 2 catalyst with the co-existence of ZnO, Sn, and CuP promoters achieved the highest M2 selectivity and Si conversion, attributed to its most abundant surface adsorption oxygen and the strongest reducibility. This work opens up a new avenue to improve the catalytic activity of Cu-based catalysts for the Rochow-Müller reaction.
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JOURNAL OF CATALYSIS
·
2022
·
IF 8.047
Songbo Wang,Pengjie Liu,Chengzhen Meng,Yidan Wang,Lei Zhang,Lun Pan,Zhen Yin,Na Tang,Ji-Jun Zou
Photoelectrochemical (PEC) water splitting is a promising approach to solve the current energy and environmental crises. Herein, we developed a “one stone, two birds” strategy to construct Au@Pt decorated ZnO/CdS heterojunctions (ZCAP) with Au-S bond and surface plasmon resonance (SPR) effect for promoted PEC water splitting. The optimized ZCAP structure exhibited the highest photocurrent density of 4.23 mA/cm 2 at 1.23 V vs. RHE and hydrogen evolution rate of 72.3 μmol·cm −2 ·h −1 , which is magnitude higher than pure ZnO. In-depth investigations indicate that SPR effect can afford hot electrons, whereas Au-S bonds over interface act as transmission bridge for facilitated electron transfer, the synergy of them achieves efficient charge separation and light utilization. Meanwhile, surface Pt nanoparticles serve as active sites for rapid charge transfer and promoted surface reaction. This article illustrates that the synergy of SPR and electron transfer bridge is an efficient strategy for promoted PEC performance.
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