ACS Applied Nano Materials
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2022
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IF 6.14
Guowen Qian,Tianci Wen,Yang Shuai,Xiongting Wu,Zhikui Zeng,Shuping Peng,Cijun Shuai
Photodynamic antimicrobial therapy via producing ROS based on light-responsive nanoparticles has attracted worldwide attention because of the high selectivity and low side effects. However, biofilms and bacterial membranes provide a natural barrier to prevent the penetration of ROS, which impairs the photodynamic antibacterial efficiency of nanoparticles. Photothermal therapy is an effective strategy against biofilms and bacterial membranes because high temperature can destroy the biofilm structure and enhance the membrane permeability. Herein, Bi2S3 nanorods were anchored on the surface of zinc-doped g-C3N4 (ZnCN) nanosheets to construct a ZnCN-Bi2S3 nanocomposite; then, it was incorporated into poly-l-lactic acid and prepared into scaffolds by the selective laser sintering technology. Bi2S3 nanorods not only endowed the scaffold with an excellent photothermal property but also strengthened the photodynamic effect of ZnCN nanosheets after forming the nanocomposite. The results showed that this nanocomposite had a lower recombination rate of photogenerated electron–hole pairs and produced higher photocurrent compared to those of the g-C3N4 nanosheets and Bi2S3 nanorods. The scaffold destroyed the biofilm and elevated the bacterial membrane permeability significantly and finally achieved 98.5% antibacterial rate for Staphylococcus aureus and 96.3% antibacterial rate for Pseudomonas aeruginosa. Encouragingly, the scaffold could also promote chondrogenic differentiation because of the continuous release of Zn ions. The scaffold containing ZnCN-Bi2S3 nanocomposites possessed excellent antimicrobial and cartilage regeneration functions, which displayed great potential in treating tracheal injuries.
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INORGANIC CHEMISTRY COMMUNICATIONS
·
2023
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IF 3.8
Xiang Luo,Xunyi Zhou,Song Wei
Inorganic quantum dot films possess outstanding optical and electrical properties, which are promising in the fields of temperature sensors, thin film transistors, photodetectors, and quantum dot light-emitting diodes (QLEDs). In this paper, high-performance Ag-doped Zn x Cd 1−x S quantum dot films with full-color emission were prepared by a facile and environmentally friendly ionic liquid-assisted approach successfully. The ionic liquid solvent which plays a critical role in the preparation process was formed by the addition of n-butylammonium and n-butylamine in methanol. The n-butylammonium butyrate ionic liquid is low-temperature thermally degradable and can be easily removed from the final quantum dot films by a sintering process. The emitting color of Ag-doped Zn x Cd 1−x S quantum dot films can be easily tuned by changing the contents of Ag, Zn, and Cd in the films. The final as-prepared Ag-doped Zn x Cd 1−x S quantum dot films exhibit the high performance of full-color emission, simple process, and low preparation cost. This work will provide a new strategy to prepare high-performance photoelectric devices with a facile ionic liquid-assisted green solution approach.
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MICROCHEMICAL JOURNAL
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2023
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IF 4.8
Dan Zhao,Jingjing Huang,Juan Li,Xiao Ma,Fang Wang,Honglei Zhang,Jiaze Xie,Jian Sun,Chuanxia Chen
Dual-readout protocols with two signal transduction channels can significantly improve the detection precision and diversity. In contrast to the previous tedious and time-consuming preparation of two response materials, a convenient and commercially available small molecule o -Phenylenediamine (OPD)-based dual-mode system was developed for the ultrasensitive detection of D-penicillamine (D-PA). Fortunately and interestingly, it is demonstrated that chloride ions (Cl − ) could largely enhance the oxidative ability of copper ions (Cu 2+ ) and improve the reaction rate and efficiency of the Cu 2+ -OPD system, leading to the boosted colorimetric and fluorescent signals and shorter reaction time. Meanwhile, D-PA could strongly bind with Cu 2+ to form a stable Cu 2+ -D-PA complex, thereby inhibiting the aforementioned oxidation process and exhibiting decrease of absorbance values and fluorescence intensity. Inspired by the excellent analytical performance, an “INH” molecular logic gate was devised by employing Cl − and D-PA as the inputs, and the dual-mode strategy has been successfully employed to probe D-PA in tablets and human serum samples. Such cost-effective yet efficacious analytical tool not only improve the sensing performance of the Cu 2+ -OPD reaction system, but also enhance the detection sensitivity for D-PA and promote the application and development of OPD-based reactions.
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2023
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IF 9.9
Jiuli Chang,Wenfang Liang,Fang Xu,Dapeng Wu,Kai Jiang,Gongke Wang,Zhiyong Gao
A negative electrode with high capacity and rate capability is essential to match the capacity of a positive electrode and maximize the overall charge storage performance of an aqueous alkali battery (AAB). Due to the 3-electron redox reactions within a wide negative potential range, bismuth (Bi)-based compounds are recognized as efficient negative electrode materials. Herein, hierarchically structured bismuth oxyformate (BiOCOOH) assembled by ultrathin nanosheets was prepared by a solvothermal reaction for application as negative material for AAB. Given the efficient ion diffusion channels and sufficient exposure of the inner surface area, as well as the pronounced 3-electron redox activity of Bi species, the BiOCOOH electrode offered a high specific capacity ( C s , 229 ± 4 mAh g −1 at 1 A g −1 ) and superior rate capability (198 ± 6 mAh g −1 at 10 A g −1 ) within 0 ∼ −1 V. When pairing with the Ni 3 S 2 -MoS 2 battery electrode, the AAB delivered a high energy density ( E cell , 217 mWh cm −2 at a power density ( P cell ) of 661 mW cm −2 ), showing the potential of such a novel BiOCOOH negative material in battery-type charge storage.
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JOURNAL OF CHROMATOGRAPHY A
·
2023
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IF 4.1
Tong Chen,Shuya Wang,Xufang Zong,Bingxiang Li,Ye Shu,Xinyuan Di,Wanning Zhu,Guangsan Song,Jun Jiang
Periodic mesoporous organosilicas (PMO) hydrophilic microspheres were synthesized by co-condensation of sulfated polysaccharide from Lilum lancifolium Thunb. bridged silane (SLLTPBS) and polyhedral oligomeric silsesquioxane (POSS) as stationary phase (PMO(SLLTP-POSS)) for per aqueous liquid chromatography (PALC), which would overcome the disadvantages of using a large amount of acetonitrile on the hydrophilic interaction liquid chromatography (HILIC) columns. Average particle size of PMO (SLLTP-POSS) microspheres was 4.9 μm, which was suitable for stationary phase. The retention mechanism of the stationary phase in PALC was mainly hydrophobic interactions and also included some ion-exchange interactions and electrostatic interactions. The acid-base resistance was greatly improved compared to the C18 column. The PMO(SLLTP-POSS) column under PALC mode had increased the resolution when separating some hydrophilic compounds such as eight organic acids and eleven sweeteners compared with the C18 column and HILIC column. The new column was more efficient than the HILIC columns. Additionally, a PALC-triple quadrupole mass spectrometry approach for the simultaneous identification of the eleven sweeteners was developed. The averagere coveries of the eleven compounds were 70.20%–91.33% with the relative standard deviation (RSD) range of 1.74% to 4.27%. The results showed good precision and accuracy of the method.
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ELECTROCHIMICA ACTA
·
2022
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IF 7.336
Jinwei Wang,Yijie Zhang,Weiyi Zhang,Qiang Zhao,Jinping Li,Guang Liu
Designing earth-abundant electrocatalysts with high activity and stability is crucial to the industrial large-scale water splitting for hydrogen production. Herein, we report an effective electrocatalyst composed of inner FeMnP layer and outer FeMnS species for oxygen evolution reaction (OER). The interfacial coupling between two layers modulates the local electronic structure, reduces the indirect contact resistance, optimizes the kinetics of OER, and ultimately boosts the intrinsic OER activity. Meanwhile, the outer FeMnS nanoflowers composed of numerous nanosheets lead to a larger electrochemical surface area (ECSA), exposing more active sites, which also plays a major role in the improvement of ability to catalyze water oxidation. More importantly, the electrode has a hydrophilic/underwater aerophobic surface to insure electrolyte diffusion efficiently and the bubbles release rapidly at a large current density of OER. Therefore, the obtained FeMnS/FeMnP/NF can output the current density of 1000 mA/cm 2 with a low overpotential of 374 mV and can remain such a high current density for over 60 h. It also presents remarkable activity and stability in 30 wt% KOH solution and simulated seawater. This work presents a promising strategy for preparing high-efficiency and low-cost self-supporting electrodes for water oxidation.
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Nanomaterials
·
2022
·Vol. 12
·期 22
·3994
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IF 5.719
Zhanwu Wang,Yingrui Sui,Meiling Ma,Tianyue Wang
Cu2ZnSn(S,Se)4(CZTSSe) films are considered to be promising materials in the advancement of thin-film solar cells. In such films, the amounts of S and Se control the bandgap. Therefore, it is crucial to control the concentration of S/Se to improve efficiency. In this study, Cu2MnxZn1−xSnS4(CMZTS) films were fabricated using the sol-gel method and treated in a Se environment. The films were post-annealed in a Se atmosphere at various temperature ranges from 300 °C to 550 °C at intervals of 200 °C for 15 min to obtain Cu2MnxZn1−xSn(S,Se)4(CMZTSSe). The elemental properties, surface morphology, and electro-optical properties of the CMZTSSe films were investigated in detail. The bandgap of the CMZTSSe films was adjustable in the scope of 1.11–1.22 eV. The structural propeties and phase purity of the CMZTSSe films were analyzed by X-ray diffraction and Raman analysis. High-quality CMZTSSe films with large grains could be acquired by suitably changing the selenization temperature. Under the optimized selenization conditions, the efficiency of the fabricated CMZTSSe device reached 3.08%.Keywords:Cu2ZnSn(S,Se)4film;Mn-doping;solar cells;properties;selenization temperature
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Analytical Methods
·
2022
·Vol. 15
·期 3
·353-360
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IF 3.532
Qingchun Huang,Hongcan Sun,Changgui Lu,Chunlei Wang,Shuhong Xu
Exploring the origin of emission is fundamental in the field of carbon dots (CDs). Due to the lack of suitable in situ probing techniques, it is necessary to explore effective alternative methods that can accurately reflect the relationship between the emission and the composition of the functional groups of CDs. Herein, we propose a new method of post-synthetic treatment of CDs by photo-oxidation to investigate the origin of emission for CDs. After the addition of a photo-oxidant into pre-prepared CDs under UV irradiation, the fluorescence of CDs can be regulated from the original orange emission to the final green emission due to the damage of original functional groups and the formation of new functional groups on CDs during the post-treatment process. The abundant dynamic information about the functional groups and emissions of CDs during the visible and ready-to-monitor post-treatment process makes it possible to quantitatively analyze the origin of the emission of CDs. Our results suggest that the emission sub-peaks at 560 nm and 600 nm relate to the CD surface-state-associated –NH3+ groups, while the emission sub-peak at 537 nm or 494 nm is associated with the CD surface-state-associated –OH groups or the CD surface-state-associated carbonyl groups (CO). Under UV irradiation, the CD surface-state-associated –NH3+ groups can be continuously converted into the CD surface-state-associated –OH groups and the CD surface-state-associated carbonyl groups (CO), leading to the changed emission color of CDs.
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COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2022
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IF 5.518
Hao Huang,Yonglin Lei,Ling Bai,Yao Liang,Han Yang
The morphology of CdS affects its photocatalytic properties and assembly efficiency of CdS-based heterojunction . In this study, various morphologies of CdS, including sloping plate, spherical, flower, lamellar and leaf were synthesized by adjusting different solvents and crystal control agents in solvothermal process. By comparison of geometric matching and photocatalytic activity of the multi-shaped CdS assembling with MoS 2 , the concept of point-flat-plate microstructure assembly was firstly introduced into construction of ternary quasi 2D/2D CdS/MoS 2 /WS 2 heterojunction. Owing to better geometric configuration, quasi 2D/2D CdS/MoS 2 /WS 2 heterojunction exhibited excellent characteristics of photocatalytic degradation of tetracycline . In this work, 97.2% of tetracycline (20 mg/L, 0.1 g/L dosage) was degraded within 60 min under the irradiation of 150 W Xenon light power, which was superior to other previously reported CdS heterojunctions.The enhancement of photocatalytic performance was due to the faster separation of photogenerated electrons and the lower recombination of electron-hole pairs in point-flat-plate CdS/MoS 2 /WS 2 heterojunction. This study provides a promising way to construct highly efficient photocatalyst and other micro-nano structures for different applications.
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ACS Sustainable Chemistry & Engineering
·
2023
·
IF 8.4
Xiaoxiao Cheng,Yun Tong
Hydrazine oxidation assisting water splitting is considered as a promising strategy toward the highly efficient and energy-saving hydrogen acquirement. However, the development of efficient and stable electrocatalysts for hydrazine hydrate oxidation (HzOR) as well as hydrogen evolution reaction (HER) still remains challenging. In this study, an interface-coupled Co(OH)2/MoS2 nanosheet array is designed to form a synergistic hierarchical heterostructure on a carbon cloth substrate, which is shown to have superior bifunctional performance for HzOR/HER under alkaline conditions. Benefiting from the abundant electrocatalytic active sites and improved reaction kinetics, the Co(OH)2/MoS2/CC electrode shows superior bifunctional performances with low potentials of −134 and 177 mV at 100 mA cm–2 for HER and HzOR, respectively. For the hydrazine-assisted overall water electrolyzer system (OHzS), the Co(OH)2/MoS2/CC electrode delivers low potentials of 142, 197, and 271 mV to realize 10, 50, and 100 mA cm–2, which proves the promising potential application in large-scale preparation of hydrogen fuel. This strategy put forward a simple way toward robust and economic electrodes for energy-related systems.
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CARBON
·
2023
·
IF 10.9
Chunyu Yuan,Huijun Lv,Yujin Zhang,Qian Fei,Dongdong Xiao,Hongfei Yin,Zhen Lu,Yongzheng Zhang
Properly engineered heterojunction photocatalysts warrant a more effective way to facilitate the separation of photoexcited electron-hole pairs and consequently bolster the photocatalytic hydrogen evolution performance. Herein, 3D bicontinuous nanoporous reduced graphene oxide (np-rGO) is served as a free-standing supporting matrix for the anchorage of CdS nanoparticles to obtain the highly efficient photocatalysis system for hydrogen production . The bicontinuous internal ligament and open nanopores in 3D nanoporous heterojunction are conducive to multiple reflecting and scattering of the incident light, leading to improved light absorption and utilization capacity. Moreover, the construction of p-n heterojunction with staggered band alignment is achieved in CdS/np-rGO to accelerate the transport of photo-excited carriers. The constructed CdS/np-rGO p-n heterojunction achieves a corresponding hydrogen generation rate of 2171.23 μmol g −1 h −1 , which is 3.6 times in comparison with bare CdS. DFT calculations also indicate the preferable photocatalytic performance of CdS/np-rGO could be assigned to the ideal interfacial charge rearrangement on the heterointerface, which optimizes the H* adsorption kinetic energies and leads to a remarkable enhancement in the charge separation efficiency. It is anticipated this work could provide new sight for making the best usage of sunlight to produce solar fuel.
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2023
·
IF 9.9
Jing Wu,Jin Qu,Guang Yin,Tingting Zhang,Hao-Yu Zhao,Fan-Zhen Jiao,Ji Liu,Xiaofeng Li,Zhong-Zhen Yu
Although most solar steam generation devices are effective in desalinating seawater and purifying wastewaters with heavy metal ions , they are ineffective in degrading organic pollutants from wastewaters. Herein, we design novel solar-driven water purification devices by decoration of three-dimensional pinecones with MoS 2 nanoflowers via a one-step hydrothermal synthesis for generating clean water. The vertically arrayed channels in the central rachis and the unique helically arranged scales of the hydrothermal pinecone can not only transfer bulk water upward to the evaporation surface, but also absorb more solar light from different incident angles for solar-thermal evaporation and photodegradation of wastewaters under omnidirectional irradiations. The decorated MoS 2 nanoflowers can not only enhance the solar-thermal energy conversion efficiency, but also decompose organic pollutants in the bulk water by their photocatalytic degradation effects. The resultant hydrothermal pinecone with in situ decorated MoS 2 (HPM) evaporator exhibits a high evaporation rate of 1.85 kg m −2 h −1 under 1-sun irradiation with a high energy efficiency of 96 %. During the solar-driven water purification processes, the powdery HPM can also photodegrade organic pollutants of methylene blue and rhodamine B with high removal efficiencies of 96 % and 95 %, respectively. For practical demonstration, by floating in the methylene blue solution under 1-sun irradiation, the bulky HPM can generate clean water by simultaneous solar-thermal evaporation and photocatalytic degradation. The integration of solar steam generation and photocatalytic degradation mechanisms makes the HPM evaporator highly promising for practical high-yield purification of wastewaters.
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