ACS Applied Materials & Interfaces
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2023
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IF 9.5
Xingyu Liu,Zhen Fan,Yuhui Zheng,Jiajia Zha,Yong Zhang,Siyuan Zhu,Zhang Zhang,Xuyan Zhang,Fei Huang,Tong Liang,Chunxia Li,Qianming Wang,Chaoliang Tan
Although lead-free double perovskites such as Cs2AgBiBr6 have been widely explored, they still remain a daunting challenge for the controlled synthesis of lead-free double perovskite nanocrystals with highly tunable morphology and band structure. Here, we report the controlled synthesis of lead-free double perovskite colloidal nanocrystals including Cs2AgBiBr6 and Cs2AgInxBi1–xBr6 via a facile wet-chemical synthesis method for the fabrication of high-performance nonvolatile resistive memory devices. Cs2AgBiBr6 colloidal nanocrystals with well-defined cuboidal, hexagonal, and triangular morphologies are synthesized through a facile wet-chemical approach by tuning the reaction temperature from 150 to 190 °C. Further incorporating indium into Cs2AgBiBr6 to synthesize alloyed Cs2AgInxBi1–xBr6 nanocrystals not only can induce the indirect-to-direct bandgap transition with enhanced photoluminescence but also can improve its structural stability. After optimizing the active layers and device structure, the fabricated Ag/polymethylene acrylate@Cs2AgIn0.25Bi0.75Br6/ITO resistive memory device exhibits a low power consumption (the operating voltage is ∼0.17 V), excellent cycling stability (>10 000 cycles), and good synaptic property. Our study would enable the facile wet-chemical synthesis of lead-free double perovskite colloidal nanocrystals in a highly controllable manner for the development of high-performance resistive memory devices.
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高影响因子
CHEMICAL ENGINEERING JOURNAL
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2023
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IF 15.1
Qian Wang,Zongyan He,Rui Zhang,Jun Du,Lejin Zhu,Xueyu Li,Han Yang,Yuqing Miao,Yuhao Li
Ultrasound-activated tumor catalytic therapy has great potential in clinical cancer treatment. However, the hypoxic and immunosuppressive tumor microenvironment impairs the efficacy of solid tumor treatment, leading to a high recurrence rate of metastatic cancer. Thus, reversing the tumor microenvironment remains a formidable challenge. To circumvent these critical issues, we employ ultrasound-activable carbon monoxide (CO) gas therapy and reactive oxygen species (ROS) production to trigger immunogenic cell death (ICD) and alleviate tumor hypoxia, achieving a combination of tumor therapy and reversal of immunosuppression to overcome the limitations of monotherapy and control tumor metastasis and recurrence. In brief, we first use copper sulfide (CuS) nanosheet as a highly efficient ultrasound-controllable catalytic nanomaterial, which can catalyze carbon dioxide, water, and oxygen to produce CO, oxygen, and ROS. Moreover, as a Fenton-like catalyst, it can catalyze hydrogen peroxide at tumor sites to generate ROS. The generated CO can attack mitochondria to accelerate their metabolism and produce more ROS, thus inducing ICD. In addition, the generation of oxygen can not only serve as the source of ROS, but it can also relieve tumor hypoxia and normalize the tumor immunosuppressive microenvironment. This results in the maturation of dendritic cells and the enhancement of T-lymphocyte recruitment and infiltration, further stimulating the antitumor immune response, mediating the regression of primary and distal tumors, and inhibiting lung metastasis. This in situ sono-activable catalytic therapy strategy minimizes the toxicity of CO and ROS leakage and provides a novel approach for designing new ICD inducers and improving therapeutic effects.
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Regenerative Biomaterials
·
2023
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IF 6.7
Zhong Jun,Zheng Xiang,Wen Yuan,Li Yuewei,Zhang Jianting,Kankala Ranjith Kumar,Wang Shibin,Chen Aizheng
The inadequate quantity of hydrogen peroxide (H2O2) in cancer cells promptly results in the constrained success of chemodynamic therapy (CDT). Significant efforts made throughout the years, nevertheless, researchers are still facing the great challenge of designing a CDT agent and securing H2O2 supply within the tumor cell. In this study, taking advantage of H2O2 level maintenance mechanism in cancer cells, a nanozyme-based bimetallic metal-organic frameworks (MOFs) tandem reactor is fabricated to elevate intracellular H2O2 levels, thereby enhancing CDT. In addition, under near-infrared excitation, the upconversion nanoparticles (UCNPs) loaded into the MOFs can perform photocatalysis and generate hydrogen, which increases cellular susceptibility to radicals induced from H2O2, inhibits cancer cell energy, causes DNA damages and induces tumor cell apoptosis, thus improving CDT therapeutic efficacy synergistically. The proposed nanozyme-based bimetallic MOFs-mediated CDT and UCNPs-mediated hydrogen therapy act as combined therapy with high efficacy and low toxicity.
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JOURNAL OF NANOBIOTECHNOLOGY
·
2023
·Vol. 21
·期 1
·1-17
·
IF 10.2
Liu Lili,Chang Meiqi,Yang Rong,Ding Li,Chen Yu,Kang Yulin
Background Primary nephrotic syndrome (PNS) is characterized by edema, heavy proteinuria, hypoalbuminemia and hyperlipidemia. Moreover, podocyte injury is the key pathological change of PNS. Even though the pathophysiological etiology of PNS has not been fully understood, the production of excessive reactive oxygen species (ROS) plays an important role in the development and progression of the disease. Glucocorticoids are the first-line medications for patients with PNS, but their clinical use is hampered by dose-dependent side effects. Herein, we accelerated the rate of conversion from Ce 4+ to Ce 3+ by doping Zr 4+ in ceria-zirconia nanomedicines to treat the PNS rat model by removal of ROS. Results The engineered Ce 0.7 Zr 0.3 O 2 (7CZ) nanomedicines significantly improved the ROS scavenging ability of podocytes at a very low dose, enabling effective inhibition of podocyte apoptosis and actin cytoskeleton depolymerization induced by adriamycin (ADR). Accordingly, podocyte injury was effectively alleviated in rat models of ADR-induced nephrotic syndrome, as confirmed by serum tests and renal tissue staining. Moreover, the mRNA sequencing assay revealed the protective molecular signaling pathways of 7CZ nanomedicines in podocytes. Conclusion 7CZ nanomedicines were highly effective in protecting against ADR-induced podocyte injury in vitro and in vivo at a very low concentration. Graphical Abstract
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ChemElectroChem
·
2023
·
IF 4
Hailong Wei,Fangwei Gu,Yongsheng Wang,Jinyuan Hao,Wei Zhu,Zhongbin Zhuang
Graphical This work reports the synthesis of pure phase Ni 2 P nanowires for efficient hydrogen evolution reaction via the solution-based phosphidation method, demonstrating the effect of phosphorus ligand. Developing facile and low-cost synthetic methods of high-active platinum group metal-free electrocatalysts is essential for green hydrogen production primarily based on water electrolysis. We adopted a facile solution-based synthetic approach to prepare nickel phosphide nanoparticles (NP) and systematically studied the role of phosphorus ligands in the synthesis. Pure-phase Ni 2 P NPs were obtained by selecting the proper phosphorus ligands, which tuned the structures of the product. The Ni 2 P nanowire, prepared using triphenyl phosphite, exhibited the best activity and stability in acidic, neutral, and alkaline media for hydrogen evolution reaction (HER), indicating the advantages of the nanowire structure to the performance. In the acidic medium, it only required overpotential values of 100 and 167 mV to achieve the HER current densities of 10 and 100 mA cm −2 , respectively. Furthermore, the overpotential increased only by 26 mV during the 50-hour stability test, indicating potential for device application. It was also demonstrated that the on-site generation of insoluble nickel salts (e. g., hydroxides, phosphates, etc.) on the surface resulted in lower activity and stability in neutral and alkaline media than in acid.
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Journal of Physical Chemistry C
·
2023
·
IF 3.7
Zhaolun Yang,Xi Yuan,Yusheng Song,Mingyan Chen,Ke Xing,Sheng Cao,Jinju Zheng,Jialong Zhao
Mn-doped CsPbBr3 perovskite nanoplatelets (NPLs) with multicolor emission have very promising applications in light-emitting devices. However, the effects of NPL thickness on the Mn2+ luminescence properties remain to be investigated. Herein, a series of Mn-doped CsPbBr3 NPLs and nanocubes with different Mn/Pb molar ratios were synthesized by a supersaturated crystallization method at room temperature. The incorporation of Mn2+ ions into CsPbBr3 perovskites is attributed to the formation of the L2[Pb1–xMnx]Br4 intermediate structure in the precursor. The excitonic peak is tuned from 437 to 488 nm and the morphology evolves from NPLs to nanocubes with an increasing Mn2+ ion doping concentration due to the excess Br– from MnBr2. The photoluminescence quantum yields (PL QYs) of NPLs/nanocubes were greatly enhanced, achieving the maximum PL QYs of 88.7% at the Mn/Pb molar ratio of 3/1. The PL lifetime of Mn2+ emission is tuned from 0.19 to 0.44 ms due to the passivation of defect states and morphology transformation. Temperature-dependent steady-state and time-resolved PL spectra revealed that deep defect states in the NPLs/nanocubes were significantly reduced as the thickness increased. The Mn-doped CsPbBr3 NPLs/nanocubes show great potential for application in white light-emitting diodes.
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Journal of Materials Chemistry C
·
2023
·Vol. 11
·期 44
·15531-15540
·
IF 6.4
Yin Lv,Shuhua Tu,Min Chen
All-inorganic CsPbX3 (X = Cl, Br, I) perovskite quantum dots (PQDs)/polymer composite films have been used widely in light-emitting devices. Most methods of fabricating CsPbX3 PQDs/polymer composite films cannot meet the diverse requirements of real applications, particularly with regard to depositing or transferring films on different substrate types, including non-planar surfaces. It is still a challenge to prepare freestanding CsPbX3 PQDs/polymer composite films and deposit them on various substrates (especially non-planar substrates). Here, we report a facile way to prepare freestanding CsPbX3 PQDs/poly(styrene–ethylene–butylene–styrene) (SEBS) composite films via an interfacial-confinement (IC) strategy. The as-obtained films were applicable to various substrates (even curved and flexible substrates) and exhibited excellent stability against various environments. These freestanding CsPbX3 PQDs/SEBS composite films could be patterned readily for anti-counterfeiting and information-encryption applications. They also could be employed as color-conversion materials for white light-emitting diodes (LEDs).
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RARE METALS
·
2023
·
IF 8.8
Zhuang Wen-Chang,Zhang Hai-Yue,Chen Zhen-Yang,Cheng Wen-Jing,Na Wei-Dan,Li Zhao,Tian Lin
Paper-based sensing platform is a point of need analytical toolkit for safety testing. However, the sensitivity, specificity, and simplicity are still challenging. Herein, we report a novel strategy (Au/δ-MnO 2 hollow nanosphere and 3,3′,5,5′-tetramethylbenzidine (TMB) induced test strips for signal-on detection) that can be utilized for hexavalent chromium (Cr 6+ ) detection. Interestingly, Cr 6+ (CrO 4 2− ) as a smart switch can remarkably enhance the oxidase-like activity of Au/δ-MnO 2 hollow nanosphere. The presence of Cr 6+ can regulate the surface electronic redistribution of Au/δ-MnO 2 and adjust the geometric configuration, which leads to the improvement in oxidase-like activity of Au/δ-MnO 2 . As a proof-of-concept application, a visual paper-based sensing platform of Cr 6+ along with quantitative analysis by the test strips was successfully constructed. This paper-based sensing platform exhibits a linear range with excellent selectivity for other interfering substances and lower limit of detection of 0.09 μmol·L −1 , providing a promising toolkit at-home Cr 6+ measurement and environmental monitoring. Graphical abstract
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Processes
·
2023
·Vol. 11
·期 11
·3160
·
IF 3.5
Yijiang Chen,Shan Yu,Yunqian Zhong,Yi Wang,Jiale Ye,Ying Zhou
Quantum dots (QDs) are promising semiconductor nanocrystals in photocatalysis due to their unique properties and in contrast to bulk semiconductors. Different from the traditional modification methods of indium phosphide (InP) QDs such as metal doping, shell design, and surface ligand modification, we firstly constructed the indium phosphide quantum dot and carbon quantum dot (InP QDs/CQDs) system and used it for the study of photocatalytic hydrogen production from hydrogen sulfide (H2S) in this work. The photocatalytic performance tests show that the average rate of photocatalytic decomposition of hydrogen sulfide to produce hydrogen of the InP QDs/CQDs system increases by 2.1 times in contrast to InP QDs alone. The steady-state and time-resolved photoluminescence spectra demonstrated that the introduction of CQDs can effectively improve the separation efficiency of photo-generated carriers. In addition, the surface electronegativity of the InP QDs/CQDs system is weaker than that of InP QDs, which may reduce the repulsion between the photocatalyst and reaction substrate, promoting the surface oxidation reaction in the photocatalytic process. This work indicates that the construction of the QDs hybrid system can improve their photocatalytic performance, providing a way to optimize QDs in photocatalysis.Keywords:indium phosphide (InP) quantum dots;carbon quantum dots;photocatalytic hydrogen production;hydrogen sulfide
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Materials
·
2023
·Vol. 16
·期 21
·7007
·
IF 3.4
Yuzhe Wang,Yueqi Zhong,Jiangzhi Zi,Zichao Lian
Conventional single-component quantum dots (QDs) suffer from low recombination rates of photogenerated electrons and holes, which hinders their ability to meet the requirements for LED and laser applications. Therefore, it is urgent to design multicomponent heterojunction nanocrystals with these properties. Herein, we used CdSe quantum dot nanocrystals as a typical model, which were synthesized by means of a colloidal chemistry method at high temperatures. Then, CdS with a wide band gap was used to encapsulate the CdSe QDs, forming a CdSe@CdS core@shell heterojunction. Finally, the CdSe@CdS core@shell was modified through the growth of the ZnS shell to obtain CdSe@CdS@ZnS heterojunction nanocrystal hybrids. The morphologies, phases, structures and performance characteristics of CdSe@CdS@ZnS were evaluated using various analytical techniques, including transmission electron microscopy, X-ray diffraction, UV-vis absorption spectroscopy, fluorescence spectroscopy and time-resolved transient photoluminescence spectroscopy. The results show that the energy band structure is transformed from type II to type I after the ZnS growth. The photoluminescence lifetime increases from 41.4 ns to 88.8 ns and the photoluminescence quantum efficiency reaches 17.05% compared with that of pristine CdSe QDs. This paper provides a fundamental study and a new route for studying light-emitting devices and biological imaging based on multicomponent QDs.
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CERAMICS INTERNATIONAL
·
2023
·
IF 5.2
Sibo Zhao,Hengbin Mao,Weishan Ma,Mingliang Li,Shao Gang,Bingbing Fan,Hailong Wang,Hongliang Xu,Hongxia Lu
All-inorganic halide perovskite nanocrystals (NCs) have attracted much attention in many fields. However, the poor stability of NCs and the toxicity of Pb have greatly hindered their practical applications. Reducing the proportion of Pb with the concept of high-entropy and coating NCs with an outer layer have been regarded as effective strategies to solve the problems. Herein, We have successfully synthesized the all-inorganic high-entropy dual-phase Cs(Pb 1/5 Mn 1/5 Ni 1/5 Zn 1/5 Cd 1/5 )Br 3 /Cs(Pb 1/5 Mn 1/5 Ni 1/5 Zn 1/5 Cd 1/5 ) 2 Br 5 (Cs‘B’Br 3 /Cs‘B’ 2 Br 5 ) perovskite NCs with good luminescence properties by a high-energy ball milling method; On the basis of which, Cs‘B’Br 3 /Cs‘B 2 ’Br 5 NCs are coated with SiO 2 and EVA resin. Due to the amorphous SiO 2 protection, the Cs‘B’Br 3 /Cs‘B 2 ’Br 5 @SiO 2 NCs maintained 93% of their emission intensity after 90 days compared to their uncoated counterparts. The PL intensity of Cs‘B’Br 3 /Cs‘B 2 ’Br 5 NCs /EVA was significantly enhanced by a factor of 4.7 for compared to the uncoated NCs. In addition, the PL emission intensity of the Cs‘B’Br 3 /Cs‘B 2 ’Br 5 NCs /EVA remained 93.7% after 90 days, and the emission peak intensity remained approximately 63% after 8 h of placement in an enclosed environment at 80% humidity through the dense polymer chains and the hydrophobic nature of the film. Finally, the film could expand its application prospects in the field of flexible device.
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ACS Applied Nano Materials
·
2023
·
IF 5.9
Yifang Sun,Liangliang Zhang,Ying Lv,Qinghui Zeng,Xiaoyang Guo,Wenyu Ji,Xingyuan Liu
AgIn5S8/ZnS (AIS/ZS) core/shell quantum dots (QDs) have been synthesized using a hot injection method at relatively low temperature without any protection using inert gas. The QDs were characterized with UV visible electronic absorption spectroscopy, PL spectroscopy, Fourier transform infrared (FT-IR) spectroscopy, transmission electron microscopy (TEM), and temperature-dependent time-resolved PL (TRPL). The average size of the QDs was determined to be 1.73 ± 0.29 nm. The QDs exhibit a major excitonic absorption band peaked at 479–573 nm and emission bands peaked from 548 to 666 nm with excitation at 410 nm with the peak position dependent on the synthesis temperature that affects the QD size. Upon the addition of trioctylphosphine (TOP) as a ligand, the PL quantum yield (PLQY) increased to 74.1% compared to 56.7% without TOP. The QDs show high stability after hours of ultraviolet (UV) light exposure or repetitive treatment with a significant amount of polar solvents, which is attributed to surface passivation by the ligands and ZnS shell. The luminescence mechanism of the core/shell AIS/ZS QDs is ascribed to donor–acceptor pair (DAP) recombination. TRPL results suggest that the binding energy of DAP increases and the DAP recombination probability is enhanced after passivation with TOP, leading to the high PLQY. Furthermore, prototype highly pure white light-emitting diodes (LEDs) based on these AIS/ZS QDs have been successfully demonstrated, yielding ideal 1931 CIE coordinates of (0.327, 0.335).
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