Journal of Environmental Chemical Engineering
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2022
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IF 7.968
Haimeng Huang,Jianfeng Zhang,Chunmei Tang,Anyu Li,Tianmeng Zhang,Huapeng Xue,Daofeng Zhang
Photocatalytic sterilization has been recently realized as a competitive strategy for effective water purification just using sunlight, for which the new photocatalytic materials play the key role. In this study, a novel Z-scheme heterojunction material MXene/TiO 2 /Bi 2 S 3 was proposed, where TiO 2 nanoparticles and Bi 2 S 3 microspheres were uniformly distributed on the MXene nanosheets through facile hydrothermal oxidation and ultrasonic dispersion. With this Z-scheme heterojunction MXene/TiO 2 /Bi 2 S 3 , effective and quick sterilization of both Gram-negative bacteria and positive bacteria in only 120 min was realized. Especially, the apparent reaction constant for S. aureus reached 0.01659 min −1 , substantially higher than MXene and other related materials in literature. This could be ascribed to the narrow band gap (1.04 eV), the wide range of light absorption range (420 nm), and the low impedance of the as-obtained composite, facilitating the transfer and separation of photo-generated charges, which was also validated through the first-order kinetic model and DFT simulation calculations. Thus, the reactive species produced by photocatalysis effectively disrupted the defense action of the bacteria by damaging bacterial membrane structure, and reducing enzyme activity as well as cellular metabolism. This efficient and low-cost material for water disinfection has a great potential for practical applications in the future.
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Nanoscale
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2022
·Vol. 14
·期 35
·12804-12813
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IF 8.307
Meihuan Liu,Jiamiao Jiang,Haixin Tan,Bin Chen,Juanfeng Ou,Hong Wang,Jia Sun,Lu Liu,Fei Wang,Junbin Gao,Chang Liu,Fei Peng,Yun Liu,Yingfeng Tu
The abuse of antibiotics in human medicine and animal husbandry leads to the enrichment of antibiotic residues in aquatic environments, which has been a major problem of environmental pollution over the past decades. Therefore, it is urgent to develop a highly efficient approach to remove antibiotics from aquatic environments. Inspired by the motion characteristics of semiconductor-based micro-/nanomotors, a light-driven Au–ZnO nanomotor system based on vertically aligned ZnO arrays is successfully developed for the enhanced photocatalytic degradation of tetracycline (TC). Under UV light (λ = 365 nm) illumination, these Au–ZnO nanomotors exhibit a high speed in deionized water and TC solution. Due to their efficient motion capability and Au-enhanced charge separation, these light-driven Au–ZnO nanomotors removed almost all TC (40 mg L−1) within 30 min and displayed stable photocatalytic activity for four cycles without any apparent deactivation. The as-developed motor-based strategy for enhanced antibiotic degradation has excellent potential in environmental governance.
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ACS Photonics
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2022
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IF 7.077
Hongwei Yu,Hao Zhu,Mengxin Xu,Jiaming Zhang,Haiwei Feng,Letian Zhang,Shihao Liu,Wenfa Xie
Flexible displays are essential to provide information in real time for human–machine interactions. As a next-generation display technology, quantum-dot light-emitting diodes (QLEDs) are potentially serving as key components for flexible displays. However, it is still challenging for QLEDs to simultaneously achieve flexibility, large-scale production, and high efficiencies. To this end, a strategy is proposed here by combining a top-emitting structure, optical microcavity optimization, and large-scale film preparation. A top-emitting microcavity with semitransparent and reflective metals is designed to achieve flexibility, efficient carrier injection, and high light extraction efficiency. Precision manufacturing of large-area QLEDs with the designed top-emitting microcavity is achieved by combining surfactant-assisted blade-coating and vacuum thermal evaporation processes. With this strategy, a large-area flexible QLED with an active area of 400 mm2 and a maximum external quantum efficiency of 21.8% is developed. This strategy provides a promising approach toward the development of flexible displays with the demonstration of a 1.3 in. passive-matrix flexible QLED display of 19 by 19 pixels.
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SOLAR ENERGY MATERIALS AND SOLAR CELLS
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2022
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IF 7.305
Yan Zhou,Xiaojian Wang,Dekun Sheng,Xiangdong Liu,Yuming Yang
Light-driven PEG/Ti 3 C 2 T x form-stable phase change films for energy storage crosslinked by Co 2+ were prepared through facile solution mixing. It is the strong interactions among PEG , Ti 3 C 2 T x and Co 2+ that endowed the system with excellent form-stability with only 5.0 wt% supporting. And the latent heat of samples was 142.1 J/g with light-thermal conversion and storage efficiency higher than 86.9%. Meanwhile, the samples possessed improved thermal stability and favorable thermal reliability. The fabricated films with comprehensive properties shows great perspective to be used in energy storage devices.
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CERAMICS INTERNATIONAL
·
2021
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IF 4.527
Jing Yang,Peilan Luo,Pingping Wan,Menglin Ye,Zhongxian Qiu,Jilin Zhang,Shixun Lian,Chengzhi Li,Wenli Zhou
Poor water stability is the main problem of commercialized Mn 4+ -doped fluorides for white light emitting diode (WLED) application. This work proposes a surface engineering strategy to rebuild a Mn 4+ -free fluoride shell on fluorides to effectively resist the destruction from water molecules. By simple processing using glyoxylic acid (GA) solution, the moisture resistance of the red-emitting fluorides can be significantly improved. The photoluminescence (PL) quantum efficiency (QE) of the surface-engineered K 2 SiF 6 :Mn 4+ (KSFM-GA) still maintain 98.43% after water immersion for 360 h, in sharp contrary to the untreated one (its PLQE decreases to 59.79%). Additionally, PL intensity of the hydrolyzed KSFM can be recovered to 99.1% through the treatment of the reducing GA solution. By using the high-stability KSFM-GA red phosphor, the as-fabricated high-performance warm-WLED device can still maintain 84.6% in luminous efficacy, higher than that (79.6%) with the untreated KSFM, after 500 h of aging in a high temperature (85 °C) and high humidity (85%) environment.
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JOURNAL OF MOLECULAR LIQUIDS
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2021
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IF 6.165
Shujin Zhou,Kai Sheng,Na Zhang,Han Zhang,Hongguang Li,Panpan Sun,Xia Xin
Metal nanoclusters (NCs) have attracted much attention due to their ultrasmall sizes and unique electronic structures. In recent years, the light-induced reversible assembly of Au NCs is already reported. However, to achieve light-triggered reversible self-assembly of Cu NCs is still challenging. Herein, we prepared photoresponsive Cu NCs by using an azo-containing ligand, i.e., 3,5-dimethyl-4-(phenyldiazenyl)-1H-pyrazole) (abbreviated to Hazopz). Each nanocluster contains three Cu(I) in the core and has atomic precision (denoted as Cu 3 -NCs hereafter). Self-assembly of Cu 3 -NCs into nanofibers occurred in binary solvent mixture with toluene as a good solvent and methanol (MeOH) as a poor one. When the suspension containing the nanofibers was irradiated by UV light, the originally straight nanofibers became bent. This morphological change is mainly due to the isomerization of the peripheral azo groups of the Cu 3 -NCs from trans- to cis -conformation, and to a small extent ascribed to the increased solubility of the cis -conformation of the azo groups in the binary solvent. The disassembled aggregates can reassemble and the bent nanofibers can become straight again when exposed to visible light. This process can be repeated for at least three times, indicating the high reversibility of this light-triggered morphological change of Cu 3 -NCs. The one-dimensional self-assemblies with light-triggered, reversible morphological changes achieved in this work can be potentially used as a medium material in an optical information storage device, and can write and erase information through the irradiation of UV light and visible light.
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Advanced Optical Materials
·
2022
·Vol. 10
·期 5
·2101762
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IF 10.05
Guangpeng Zhu,Xiuqi Shi,Guangyan Huang,Kaizhen Liu,Wei Wei,Qianqian Guo,Wei Du,Tao Wang
As contemporary star materials, 2D monolayer semiconductors have drawn huge research interests owing to their striking electrical and optical properties, rendering them ideal candidates as building blocks for novel optoelectronic devices. Towards light emitting devices with extended functions, it is necessary to manipulate the polarization of light emission from monolayer semiconductors. However, most of these monolayer semiconductors exhibit no or very limited polarization sensitivity inherited from their structural anisotropy, making it challenging to develop highly polarized light sources. Herein, by embedding monolayer tungsten diselenide (WSe 2 ) in a nanowire-on-film nanocavity, highly polarized light emission is demonstrated, featuring degree of polarization (DoP) of ≈99%. The highly anisotropic light emission originates from the near-field coupling between the WSe 2 monolayer with the polarization-dependent gap plasmons of the nanowire-on-film nanocavity. Moreover, as the width of the nanowire essentially defines the gap-plasmon resonance of the nanowire-on-film nanocavity, the anisotropy of the highly polarized light emission is systematically tuned by changing the nanowire width. The findings pave the way for engineering anisotropic optical properties of monolayer semiconductors and will boost the development of functional polarization-sensitive 2D optoelectronic devices.
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INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
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2021
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IF 6.953
Qi Liu,Haonan Zhang,Hao Ren,Huamin Zhai
The use of lignin is limited by its heterogeneity and complexity. This study was processed using different methods to obtain spruce milled wood lignin (SMWL), spruce kraft lignin (SKL), and spruce lignocresol (SLC) for comparative analysis of the structure and antioxidant activity . SMWL has a complete softwood lignin side-chains structure and lignin carbohydrate complexes. SKL contains fewer ether bonds, while more conjugate structures and condensed structures contribute to the color. However, the α-position of the lignin side chain eliminates most of the hydroxyl and ether bonds (β-O-4/α-OH, phenylcoumaran, and dibenzodioxocine structure) and effectively grafts p -cresol in the phase separation reaction. It not only inhibits the self-condensation of lignin, but also forms the 1,1-diarylpropane unit while protecting β-O-4 linkages from not breaking. Importantly, SLC has few conjugate structures that result in the lightest color among all lignin isolated. Besides, SLC has a high yield and contains trace carbohydrates, indicating that the phase separation method can achieve great amounts of purity separated lignin. The antioxidant activity of lignin was evaluated, results show that 85% of the 2,2-diphenyl-1-picrylhydrazyl (DPPH) radicals were scavenged at the end of 60 min. Owing to its unique color, structural properties, and continuous antioxidant activity, SLC has the potential to manufacture antioxidant cosmetics.
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Nanomaterials
·
2021
·Vol. 11
·期 11
·2940
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IF 5.076
Bingke Zhang,Shengwen Fu,Dongbo Wang,Shujie Jiao,Zhi Zeng,Xiangyu Zhang,Zhikun Xu,Yaxin Liu,Chenchen Zhao,Jingwen Pan,Donghao Liu,Jinzhong Wang
The photocatalysis technique has been proven to be a promising method to solve environmental pollution in situations of energy shortage, and has been intensively investigated in the field of pollutant degradation. In this work, a band structure-controlled solid solution of BiOBrXI1−X(x = 0.00, 0.05, 0.10, 0.15, 0.20, 1.00) with highly efficient light-driven photocatalytic activities was successfully synthesized via simple solvothermal methods. The phase composition, crystal structure, morphology, internal molecular vibration, optical properties, and energy band structure were characterized and analyzed by XRD, SEM, HRTEM, XPS, Raman, and UV Vis DRS. To evaluate the photocatalytic activity of BiOBrXI1−X, rhodamine B was selected as an organic pollutant. In particular, BiOBr0.15I0.85displayed significantly enhanced photocatalytic activity by virtue of modulating the energy band position, optimizing redox potentials, and accelerating carrier separation. Moreover, the enhancement mechanism was elucidated on the basis of band structure engineering, which provides ideas for the design of highly active photocatalysts for practical application in the fields of environmental issues and energy conservation.Keywords:BiOBrXI1−X;solid solution;photocatalytic degradation;band structure engineering
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CHEMICAL ENGINEERING JOURNAL
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2021
·
IF 13.273
Yanlong Shao,Wenbo Du,Yong Fan,Jie Zhao,Zhihui Zhang,Luquan Ren
Great attention has been paid to superhydrophobic surface with tunable water adhesion behaviors, but many challenges still remain for developing a surface with accurate regional control of the superwetting behaviors to realize on-demand responses. Herein, a superhydrophobic surface with accurately controllable water adhesion performance for local areas has been developed, by integrating carbonyl iron particles (CIPs) into a shape memory polymer (SMP) to get photothermal-responsive pillar array. The morphologies of the programmed surface can be remotely and accurately regulated through near-infrared (NIR) light irradiation, hence resulting in the accurate control of surface superwetting behaviors. By adjusting the intensity and targeted area of the NIR irradiation, the controllable surface deformation even in a minimal area of ~0.95 mm 2 can be achieved. Among those, the surface with bent microstructures demonstrates high water adhesion force (98 μN) with a high water rolling-off angle (even the surface was overturned to 180°), whereas the superhydrophobic surface with the recovered micro/nanostructure arrays exhibits relatively low water adhesion force (25 μN) with an extremely low rolling-off angle (4°). We have proven that these programmable superhydrophobic surfaces can not only accurately adjust the droplet adhesive force in the target area, but also serve as ideal platforms for distinct microfluidic microreactors. These unique characteristics endow the NIR light remotely controlled superhydrophobic surfaces with special advantages for abroad applications in liquid droplet manipulations, micro reactions, biochemical detections, etc.
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COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2021
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IF 4.539
Yuzhe Cao,Chenglong Li,Xunkai Zhu,Bo Ge,Guina Ren,Xin Shao
Further exploitation of a functional composite with superhydrophobic and visible-light degradation for solving the trouble of oil spilling and organic pigment contamination is beneficial to ecological environment protection. In this article, a facile physical dip-coating was adopted to fabricate the superhydrophobic and photocatalytic cotton fabric-based composite after F-SiO 2 nanoparticles and Bi 2 MoO 6 photocatalyst were anchored into a fiber framework. It can be concluded that circulating utilization is able to be achieved through the as-prepared composite (the efficiency extent is still up to 98%) after numerous experiments on degrading organic pigments under visible-light illumination. Importantly, its steady waterproof property can be maintained after harsh treatments (the corrosion of acid/alkali and the immersion of boiling water). As is verified by the capture experiments on •OH, •O 2 − and h + radicals, •O 2 - acted as a vital active species, whose superiority was brought into the decomposition of organic pigment sewage.
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PHYSICAL CHEMISTRY CHEMICAL PHYSICS
·
2021
·Vol. 23
·期 46
·26356-26365
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IF 3.676
Dongliang Li,Rong Chen,Xun Zhu,Dingding Ye,Yang Yang,Wei Li,Haonan Li,Yijing Yang,Qiang Liao
In this study, a contactless, flexible, and interference-free light fueled method has been developed to enhance the mixing between the ssDNA and dynabeads in a droplet, which enables rapid probe preparation for promoting the probe technology based on open surface droplet microfluidics. In this light fueled method, the use of the photothermal effect of a focused infrared laser can easily create non-uniform temperature distribution and accordingly the surface tension gradient over the interface as a result of the localized heating effect, which thereby initiates the Marangoni flow in a droplet. Experimental results confirm that the light-induced Marangoni flow greatly enhances the mixing, ensuring rapid and efficient binding between the ssDNA and dynabeads. Moreover, the mixing intensity and degree can be simply tuned by controlling the laser intensity and laser heating time. The light fueled rapid mixing method developed in the present study paves the way for rapid bio-chemical detection.
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