JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2023
·
IF 9.9
Zhenzhen Dong,Jinbo Fei,Tonghui Wang,Junbai Li
Herein, we develop a strategy of matched spectral and temporal light management to improve photosynthetic efficiency by co-assembling natural thylakoid membrane (TM) with artificial long afterglow particle (LAP). To be specific, LAP with excellent stability and biocompatibility possesses the capabilities of light conversion and storage, optically-matched with the absorption of TM. These favorable features permit LAP as an additional well-functioned light source of photosynthesis performed by TM. As a consequence, enhanced photosynthesis is achieved after co-assembly, compared with pure TM. Under light, the rates of electron transfer , oxygen yield and adenosine triphosphate (ATP) production in this biohybrid architecture are boosted owing to down-conversion fluorescence emission from LAP. Under dark, persistent phosphorescence emission in charged LAP facilitates continual photosynthesis of TM, while that of pure TM almost stops immediately. This proof-of-concept work opens a new route to augment the photosynthetic efficiency of green plants by utilizing precise light-managed materials.
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JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2023
·Vol. 34
·期 2
·1-11
·
IF 2.8
Wu Xiaoping,Chen Long,Hu Haihua,Song Changsheng,Jiang Qi,Wang Peng,Xu Lingbo,Lin Ping,Cui Can
Cu 2 O@SnS 2 heterojunction photocatalysts with one-dimensional hierarchical nanostructure were prepared by the solvothermal method. The Cu 2 O@SnS 2 hierarchical nanostructure is composed of Cu 2 O nanowire core as well as in situ grown ultra-thin SnS 2 nanosheets on Cu 2 O nanowires. The hierarchical Cu 2 O@SnS 2 composite shows higher catalytic activity, and the degradation ratio of MB reaches nearly 100% at 80 min. The first-order reaction kinetic constant of Cu 2 O@SnS 2 is 0.045 min − 1 , which is much higher than that of Cu 2 O (0.003 min − 1 ) and SnS 2 (0.014 min − 1 ). The improvement in photocatalytic performance is mainly due to the formation of typical heterojunction between Cu 2 O and SnS 2 . Photo-induced electrons in the CB of Cu 2 O react with oxygen to form superoxide radicals (·O 2− ) with strong oxidation ability. At the same time, the photo-induced holes in the VB of SnS 2 also have strong oxidation ability, and the two can synergistically induce the degradation of pollutants. In addition, SnS 2 nanosheets not only provide a large number of reaction sites for photocatalytic degradation, but also facilitate the migration of photo-induced carrier to the surface. The unique hierarchical Cu 2 O@SnS 2 microstructure can also promote multiple light scattering within the material to enhance light absorption. Thus, the one-dimensional hierarchical Cu 2 O@SnS 2 is a promising new visible light catalyst, which has potential application prospect in environmental protection and wastewater treatment.
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Laser & Photonics Reviews
·
2023
·Vol. 17
·期 3
·2200861
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IF 11
Longxue Cao,Yang Shen,Bing Lei,Wei Zhou,Shuhong Li,Yunlong Liu,Yu Lu,Kai Zhang,Hao Ren,Yan-Qing Li,Jian-Xin Tang,Wenjun Wang
Reduced-dimensional perovskite light-emitting diodes (PeLEDs) have shown great potential in solution-processed high-definition displays. However, the inferior electroluminescent (EL) performance of blue PeLEDs has become a huge challenge for their commercialization. The inefficient domain control [number of PbX 6 − layers ( n )] and deleterious phase segregation make the blue PeLEDs suffer from low EL efficiency and poor spectral stability. Here, a rational strategy for perovskite crystallization control by adjusting the precursor concentration is proposed for improving phase distribution and suppressing ion migration in reduced-dimensional mixed-halide blue perovskite films. Based on this method, efficient sky-blue PeLEDs exhibit a maximum external quantum efficiency (EQE) of 8.5% with stable EL spectra at 482 nm. Additionally, spectrally stable pure-blue PeLEDs at 474 and 468 nm are further obtained with maximum EQEs of 4.0% and 2.4%, respectively. These findings may provide an alternative scheme for manipulating perovskite crystallization dynamics toward efficient and stable PeLEDs.
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MRS Communications
·
2023
·Vol. 13
·期 4
·538-545
·
IF 1.9
Yin Jinkun,Chu Yaoqing,Tan Lianjiang
Cu/N co-doped TiO 2 nanopowder was prepared with a facile sol–gel method. In the absence of stabilizing agents, the co-doped nanopowder with nanoscaled particle sizes was obtained. Doping didn’t change the anatase crystal structure of TiO 2 . Cuprite Cu 2 Cl(OH) 3 formed in the co-doped nanopowder. Based on ultraviolet–visible (UV–vis) spectroscopy and X-ray photoelectron spectroscopy (XPS) data, the mechanisms of significantly improved photocatalytic activity of the co-doped nanopowder were discussed. The antibacterial evaluation and cytotoxicity test suggested the nanopowder inhibited bacteria significantly under visible light and had ultralow cytotoxicity. This work provided a promising antibacterial agent with potential biomedical applications.
Graphical abstract
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CHINESE JOURNAL OF STRUCTURAL CHEMISTRY
·
2023
·
IF 2.2
Yuxin Sun,Ye Li,Jiajia He,Liuyun Chen,Hongbing Ji,Zuzeng Qin,Tongming Su
Ternary sulfide solid solutions have garnered great attention in photocatalytic water splitting due to their tunable electronic property, low cost, and sufficient light-absorption performance. Herein, a series of Mn x Cd 1 – x S samples with different Mn/Cd molar ratios were synthesized by solvothermal method and used for photocatalytic hydrogen production under visible light. The Mn 0.2 Cd 0.8 S and Mn 0.4 Cd 0.6 S are demonstrated to be the solid solutions, while Mn 0.6 Cd 0.4 S and Mn 0.8 Cd 0.2 S consist of Mn x Cd 1 – x S solid solution and MnS. In addition, the Mn 0.4 Cd 0.6 S exhibits the highest photocatalytic performance with the H 2 production rate of 185.95 μmol·h −1 , which is 4.7 times higher than that of CdS. Without cocatalyst, the quantum efficiency of Mn 0.4 Cd 0.6 S reaches 2.04% at 400 nm. In addition, the Mn 0.4 Cd 0.6 S solid solution also shows high stability during the photocatalytic H 2 production reaction. The effect of Mn/Cd molar ratio on the microstructure, band gap structure, and photocatalytic hydrogen production performance of Mn x Cd 1– x S was revealed systematically. The excellent photocatalytic H 2 production performance of Mn 0.4 Cd 0.6 S solid solution is mainly due to its enhanced reducing potential and high charge separation efficiency.
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APPLIED CATALYSIS B-ENVIRONMENTAL
·
2023
·
IF 22.1
Lin Yang,Zhuo Li,Xiaoxiang Xu
With a light absorption up to 740 nm, BaNbO 2 N is promising for solar water splitting but normally owns a low activity due to a high defect concentration. Here, Mg is adopted as a dopant to modify the BaNbO 2 N. The presence of Mg not only reduces the defect concentration and enhances surface hydrophilicity but also tunes the bandgap as well as the band edge positions. These modifications greatly promote the charge separation and transfer of BaNbO 2 N, boosting the photocatalytic activities for O 2 -evolution reactions. An apparent quantum efficiency of 1.65 % at 420 ± 20 nm has been attained for Mg modified BaNbO 2 N. Overall water splitting at a stable gas-evolution rate (∼ 2.0 μmol·h −1 for H 2 and ∼ 1.0 μmol·h −1 for O 2 ) has been realized by integrating Mg-modified BaNbO 2 N into a Z-scheme system. These findings justify Mg as an effective dopant to modulate the photocatalytic behavior of Nb-based perovskite oxynitrides.
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WATER RESEARCH
·
2023
·
IF 12.8
Tao Yang,Cui Huang,Linqian An,Ge Zeng,Juan Li,Changyu Liu,Xiaolong Xu,Jianbo Jia,Jun Ma
Hexavalent chromium (Cr(VI)) is ubiquitous in natural environments, whereas its role in the transformation of coexisting contaminants may have been overlooked. In this work, it was reported for the first time that the irradiation of Cr(VI) by solar light (solar light/Cr(VI) system) could effectively degrade various micropollutants with different structures. The removal efficiency of selected micropollutants was increased by 13.3–64.8% by the solar light/Cr(VI) system compared to that by direct solar photolysis. Meanwhile, the oxidation rates were enhanced by 2.2–21.5 folds, while they were negligible by Cr(VI) oxidation alone. Experiments by specific scavengers, probe compounds, fluorescence absorbance, and electron spin resonance analysis demonstrated that hydroxyl radical (•OH) was the major reactive species in the solar light/Cr(VI) system. Further experiments showed that the generation of •OH was closely related to the intermediate Cr(V) generated from Cr(VI) reduction, and Cr(V) could be re-oxidized back to Cr(VI). Increasing solution pH negatively affected model micropollutant (carbamazepine (CBZ)) degradation by the solar light/Cr(VI) system, mainly due to the decreased quantum yield of •OH at higher pH. Coexisting sulfate ions showed negligible effect on CBZ degradation in the solar light/Cr(VI) system, while the presence of bicarbonate , chloride, and humic acid inhibited CBZ degradation to varying degrees, owing to their diverse scavenging effects on •OH. Furthermore, moderate CBZ degradation was also achieved by natural solar light photolysis of Cr(VI). This study demonstrated the pivotal role of Cr(VI) in the transformation of micropollutants under solar irradiation, which advances the understanding of the fate of micropollutants in natural environments.
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ADVANCED FUNCTIONAL MATERIALS
·
2023
·Vol. 33
·期 48
·2305423
·
IF 19
Yanyu Deng,Zhiguo Zhang,Guanhua Ren,Zhiqi Li,Chunyu Liu,Wenbin Guo
The surface treatment for solution-processed perovskite films using molecular passivation agents has been reported to be critical for improving the performance of perovskite light-emitting diodes (PeLEDs). Generally, most studies emphasized the binding effect between passivation molecules and perovskite surface, while halide perovskites are dominated by multiple defects and need more comprehensive passivation, which is often neglected. Here, a molecule of 5-ammonium valeric acid trifluoroacetate (5-AVATFA) with multi-functional groups is rationally developed to modify the interface of advanced PeLEDs. Combining experimental and density functional theory analysis, the synergism effects of reduced surface defects and increased steric hindrance of 5-AVATFA, which can greatly suppress the ion migration of PeLEDs, are demonstarated. Because of the passivation effect of multi-functional 5-AVATFA, an optimal device with an external quantum efficiency of 22.32%, a radiance of 558.46 W sr −1 m −2 , and an extended half-lifetime of 103.3 h is obtained.
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ChemCatChem
·
2023
·Vol. 15
·期 22
·e202300919
·
IF 4.5
Ying Wang,Yonglong Li,Zhao Zhang,Wei Xie
Graphical Plasmonic photocatalysis : A boosting hot-electron-hole separation driven by interfacial contact potential enables high photocatalytic activity on Au core -Ag shell bimetallic nanoparticles towards the four-electron reduction of 4-NTP to 4,4′-DMAB. Plasmonic photocatalysis under visible-light irradiation has long been regarded as a very promising strategy for inducing chemical transformations. However, the efficient utilization of these hot electrons on monometallic nanoparticles to induce chemical reaction remains a challenging subject. Here, we study plasmonic hot electron activity of Au core -Ag shell bimetallic nanoparticles towards the four-electron reduction of 4-nitrothiophenol to 4,4′-dimercaptoazobenzene. Our results show that Au core -Ag shell nanoparticles possess a higher catalytic activity than pure Au and Ag nanoparticles and the photocatalytic transformation is strongly dependent on the thickness of Ag shell. The plasmonic catalytic activity could be explained by a boosting hot-electron-hole separation driven by the contact potential at the bimetallic interface. This work provides new opportunities to enhance the efficient utilization of hot electron for plasmonic photocatalysis reaction.
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Nature Communications
·
2023
·Vol. 14
·期 1
·1-11
·
IF 16.6
Xin Chen,Ren Zhongguo,Zhang Leran,Yang Liang,Wang Dawei,Hu Yanlei,Li Jiawen,Chu Jiaru,Zhang Li,Wu Dong
Inspired by the flexible joints of humans, actuators containing soft joints have been developed for various applications, including soft grippers, artificial muscles, and wearable devices. However, integrating multiple microjoints into soft robots at the micrometer scale to achieve multi-deformation modalities remains challenging. Here, we propose a two-in-one femtosecond laser writing strategy to fabricate microjoints composed of hydrogel and metal nanoparticles, and develop multi-joint microactuators with multi-deformation modalities (>10), requiring short response time (30 ms) and low actuation power (<10 mW) to achieve deformation. Besides, independent joint deformation control and linkage of multi-joint deformation, including co-planar and spatial linkage, enables the microactuator to reconstruct a variety of complex human-like modalities. Finally, as a proof of concept, the collection of multiple microcargos at different locations is achieved by a double-joint micro robotic arm. Our microactuators with multiple modalities will bring many potential application opportunities in microcargo collection, microfluid operation, and cell manipulation.
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Molecular Catalysis
·
2023
·
IF 4.6
Hele Liu,Pengfei Tan,Lu Yang,Mingyuan Zhang,Jiaoyang Chen,Ruifeng Ren,Huanhuan Zhai,Tiangui Qi,Jun Pan
Improving photocatalytic activity is crucial for promoting photocatalytic hydrogen production. Element doping is a feasible strategy to accelerate carrier separation and migration rate. Herein, a simple one-pot hydrothermal process was used to create In doped Sn 3 O 4 composite photocatalyst. It was demonstrated that the addition of In considerably raises the concentration of oxygen vacancy , which provides more unsaturated active sites, thus regulating the photocatalyst's electronic structure and surface properties, and promoting the carrier migration efficiency. Meanwhile, the light absorption range of samples after doping is redshifted, and the light absorption capacity is enhanced, which effectively improves the photocatalytic activity. Due to this, the optimal sample's average hydrogen production under visible light reached 22.83 μmol g −1 h −1 , 4.5 folds more than that of Sn 3 O 4 , and shown good stability. This research presents a novel approach for the development of metal oxide photocatalyst with excellent activity and durability.
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Materials Today Communications
·
2023
·
IF 3.8
Fenting Yu,Beiyang Guo,Yuan Zhuang,Sridhar Komarneni,Jianfeng Ma
The ZnFe 2 O 4 -Bi 2 MoO 6 composite photocatalyst was applied to construct a persulfate activation system combined with photocatalysis . The composite material was synthesized by a simple hydrothermal method and characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), X-ray photoelectron spectroscopy (XPS) and UV–vis diffuse reflectance spectroscopy (UV-Vis DRS) to study the phase formation, morphology, valence state of elements and light absorption property, respectively. The experimental results showed that the degradation efficiency of tetracycline can reach 84 % in 40 min under visible light, with K 2 S 2 O 8 as the co-catalyst. The principal advantage of this system is that it can be applied to a wide pH range (3−11) with negligible influence. This system is also less affected by anions (HCO 3 2- , NO 3 - , Cl - ,) and humic acid (HA). The excellent catalytic performance may be due to the retention of electron hole pairs with high redox ability after the construction of heterojunction and the formation of active radicals, O 2 •- , SO 4 •- and •OH. In addition, the ZnFe 2 O 4 /Bi 2 MoO 6 composite catalyst showed good stability and recyclability.
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