Small
·
2024
·
IF 13
Lulu Zhao,Jinguo Wang,Ruifang Yan,Shuo Wang,Ziyi Liao,Hongli Yang,Dongjiang Yang,Huilin Hou,Weiyou Yang
BiOCl-based materials have emerged as promising photocatalysts for converting CO 2 into valuable products and fuels. However, challenges such as low light absorption and inefficient charge carrier separation require effective solutions, with vacancy engineering offering a promising approach. Current research primarily focuses on anion vacancies, leaving cation vacancies less explored. In contrast, this study presents a novel method to enhance visible-light-driven photocatalysts by Bi cation vacancies in ultrathin BiOCl nanosheets through a straightforward hydrochloric acid etching process (HAE-BiOCl). These introduced Bi vacancies not only expand the light absorption range and enhance carrier separation, but also serve as active sites for CO 2 adsorption. Additionally, Bi vacancies can effectively lower the activation energy of COOH − species and thereby enhance overall reaction activity. As a result, the HAE-BiOCl catalyst exhibits exceptional photocatalytic CO 2 reduction performance without the need for co-catalysts or sacrificial agents. It achieves high CO generation rates of 68.39 and 17.43 µmol g −1 h −1 under 300 W Xe lamp and visible light irradiation, respectively. These rates are significantly higher compared to counterparts without vacancy creation and surpass those of most reported Bi-based photocatalysts. This study underscores the potential of inducing cation vacancies via acid etching as a valuable strategy for advancing photocatalysis.
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CERAMICS INTERNATIONAL
·
2024
·
IF 5.1
Qianlong Fu,Yuting Ma,Juan Wang,Yongzhao Yang,Peng Wang,Shuang Li,Yang Zhao
High-purity SiC ceramic membrane has gained tremendous attention in the treatment of various corrosive wastewaters. Additive manufacturing technique makes it possible to fabricate high-purity SiC ceramic membrane with complex configurations. Here, we proposed a route for the preparation of high-purity SiC ceramic membrane support using digital light processing and SiC whisker reinforcement. With the increase of whisker content, the viscosity of SiC w /SiC photosensitive slurry increased due to the formation of whiskers agglomerations; the average pore size shifted from 3.15 μm to 1.35 μm with the occupation of large pores by SiC whiskers. In addition, the compressive strength of the ceramic support increased from 10.7 MPa to 16.7 MPa because of the decline in pore size and the toughening effects by SiC whiskers. So, the introduced SiC whiskers enhanced the pore connectivity and mechanical strength of the porous ceramics. This work provides a feasible path to manufacture high-purity SiC ceramic membrane support with complex configuration, high pore-connectivity and excellent mechanical properties.
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MATERIALS RESEARCH BULLETIN
·
2024
·
IF 5.3
Xue Zhang,Linwei Peng,Siyuan Ye,Zhuohan Lin,Yan Li
Inorganic oxide especially SiO 2 encapsulation strategy is an effective way to improve the stability of all-inorganic cesium lead halide perovskite (CsPbX 3 , X = Cl, Br, I) nanocrystals (NCs). However, when CsPbX 3 NCs are encapsulated in SiO 2 by in situ tetraethyl orthosilicate (TEOS) hydrolysis, the unavoidable by-products (water and ethanol) of TEOS hydrolysis commonly damage the structural and optical properties of the CsPbX 3 NCs. Herein, TDPA-CsPbBr 3 NCs with the dense tetradecylphosphonic acid (TDPA) passivation were pre-prepared and subsequently encapsulated into SiO 2 via in situ TEOS hydrolysis. Benefitting from the dense phosphonic passivation layer capable of resisting the erosion of polar by-products generated by TEOS hydrolysis, the obtained TDPA-CsPbBr 3 @SiO 2 nanocomposites maintain the excellent optical properties of the colloidal CsPbBr 3 NCs, showing near-unity photoluminescence quantum yield (PLQY) and ultra-narrow full width at half maximum (FWHM). Furthermore, the TDPA-CsPbBr 3 @SiO 2 nanocomposites exhibit outstanding stability against ethanol, UV light, and heating treatment due to the dual protection of dense phosphonate ligand layers and inorganic SiO 2 matrix. The white light-emitting diodes (WLED) device was fabricated by sequentially depositing green-emitting TDPA-CsPbBr 3 @SiO 2 nanocomposites and red-emitting K 2 SiF 6 :Mn on blue-emitting GaN LED chip. The obtained WLED exhibits excellent luminous performances with standard white emission of CIE Coordinates (0.33, 0.33), a color gamut 138 % of the NTSC and 103 % of Rec. 2020, respectively. This study demonstrates that TDPA-CsPbBr 3 @SiO 2 nanocomposites have a potential application in solid-state lighting and backlight displays.
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2024
·
IF 9.4
Min Ge,Hanqing Yin,Wenjie Tian,Huayang Zhang,Shujun Li,Shaobin Wang,Zhijun Chen
Carbon dots (CDs) exhibit distinctive optical, electronic, and physicochemical properties, rendering them effective cocatalysts to enhance the photocatalytic performance of light-absorbing materials. The interplay between CDs and substrates is pivotal in manipulating photogenerated charge separation, transfer, and redistribution, significantly influencing overall photocatalytic efficiency. This study introduces a novel electrostatic interaction strategy to interface positively charged CdS nanorods (CdS NRs) with negatively charged furfural-derived CDs. The resulting optimized composite (25-CDs@CdS NRs), showcases photocatalytic hydrogen production at a rate of 1076 μmol g −1 h −1 . Experimental analyses and theoretical simulations offer insights into the structure–activity relationship, underscoring the crucial role of enhanced electrostatic interaction between CDs and CdS NRs in facilitating efficient charge transfer, activating reaction sites, and improving reaction kinetics. This research establishes an adaptable strategy for integrating CDs with metal-based semiconductors, opening new avenues for developing photocatalytic hybrid assemblies.
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Molecular Catalysis
·
2025
·
IF 4.9
Fan Wu,Chengwei Zhou,Yonggong Tang,Jiangang Han,Weinan Xing,Guangyu Wu,Yudong Huang
Solar-driven photocatalytic CO 2 reduction to clean hydrocarbon fuels offers great potential for mitigating the greenhouse effect and energy crisis. However, achieving high selectivity and efficiency in visible-light-driven CO 2 -to-CH 4 conversion remains a major challenge. In this work, a series of nickel-doped cobalt phosphide photocatalysts (NiCoP) with varying doping mass ratios were prepared using ZIF-67 as the precursor. The NiCoP photocatalyst exhibited a unique and regular nanoflower-like spherical structure, making it suitable for visible-light-driven CO 2 reduction. The research demonstrated that, compared to CoP, the synthesized Ni-doped CoP photocatalyst exhibited superior photocatalytic performance in CO 2 reduction, particularly in terms of CH 4 product selectivity. Among the tested catalysts, NiCoP-4 displayed the highest performance, achieving CO and CH 4 production rates of 599.00 and 3458.00 µmol h −1 g −1 , respectively. The regular nanoflower-like spherical structure offers enhanced accessibility to active sites and improved charge separation/transfer efficiency, significantly reducing the charge transfer distance. This work provides a theoretical foundation for the development and application of novel nanoflower-like spherical photocatalysts.
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Journal of Materials Chemistry C
·
2024
·Vol. 12
·期 20
·7162-7168
·
IF 5.7
Zhenghao He,Zhiqiang Bao,Xiaoyang Guo,Ying Lv,Tienan Wang,Yuejia Ma,Xingyuan Liu
Transparent displays are one of the development directions of future displays, and have great application potential in smart windows, wearable electronic products, virtual reality technology, touch screens and other fields. Perovskite materials have high fluorescence quantum efficiency and high color purity, which make a thin luminous layer achieve high device performance, making us foresee their potential application in the field of transparent displays in the future. However, due to the limitations of the modulation of the luminescent layer and top transparent electrodes, the performance of transparent perovskite light-emitting diodes (TPeLEDs) still has a certain gap compared to the traditional perovskite light-emitting diodes (PeLEDs). In this work, the first blue emitted TPeLEDs were prepared by using quasi two-dimensional perovskite materials and multilayer transparent top electrodes. By designing and optimizing the performance of the luminescent layer and the structure of the top transparent electrode, the transmittance and device efficiency of TPeLEDs were enhanced. The best TPeLED shows a maximum transmittance of nearly 70%, and displays a maximum brightness of 2294 cd m−2 and a maximum external quantum efficiency (EQE) of 11.73%.
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ANALYTICAL CHEMISTRY
·
2025
·
IF 6.7
Chengzhuo Yu,Jin Xu,Li Xiong,Yarui Wang,Silong Wang,Fanglan Geng,Zesen Shang,Huasheng Wu,Lixia Zhao,Yawei Wang
Luminol-based chemiluminescence (CL) systems, as a powerful tool for bioanalysis, are limited owing to their weak CL intensity and self-decomposition of the classic oxidant H2O2. Herein, we introduced a new luminol CL enhancer, the natural light-driven photocatalyst MIL-100(Fe)/TiO2, for the selective determination of dopamine (DA). By employing MIL-100(Fe)/TiO2 for the first time as an efficient enhancer, the MIL-100(Fe)/TiO2-luminol CL intensity was 100 times higher than that of the classical H2O2-luminol system. The CL spectrum, UV–vis absorption spectroscopy, radical scavenger experiments, and electron spin resonance spectroscopy were utilized to investigate the possible CL mechanism of the MIL-100(Fe)/TiO2-luminol system. All of the results indicated that MIL-100(Fe)/TiO2 can generate reactive oxygen species under mild natural light, which could react rapidly with the luminol anion radical and result in direct CL emission. The sensitive plate for DA was developed based on its inhibiting effect on CL intensity, and the linear range between CL intensity and DA concentration was 100 nM–1000 μM with a detection limit of 16.7 μM (S/N = 3). This study successfully achieved a stable reactant that can directly trigger the CL of luminol without the need for additional oxidizing agents under mild natural light and offers new possibilities for photoinduced amplification technology.
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Energy Technology
·
2025
·
IF 3.6
Yueqin Zhao,Yuxin Sun,Liuyun Chen,Xianjun Yang,Pengfei Yang,Xinling Xie,Zuzeng Qin,Hongbing Ji,Tongming Su
Photocatalytic hydrogen production from water splitting is a promising technology for overcoming energy and environmental issues. Herein, Mn 0.4 Cd 0.6 S/CuS composites were constructed for photocatalytic hydrogen production. The amount of CuS is optimized, and the composition and structure of the Mn 0.4 Cd 0.6 S/CuS composite are investigated via various characterization techniques. The formation of a p–n heterojunction between Mn 0.4 Cd 0.6 S and CuS and the built-in electric field improve the separation efficiency of photogenerated electrons and holes and enhance the performance of photocatalytic hydrogen production. When the content of CuS is 5 wt%, Mn 0.4 Cd 0.6 S/5CuS presents the best photocatalytic hydrogen production rate of 22.10 mmol h −1 g −1 , which is 3.0 times greater than that of Mn 0.4 Cd 0.6 S, and the apparent quantum yield reaches 7.82% at 400 nm. Combined with the activity test and characterization results, the reaction mechanism of photocatalytic hydrogen production over the Mn 0.4 Cd 0.6 S/CuS composite is proposed.
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ADVANCED MATERIALS
·
2025
·
IF 26.8
Yongsheng Sun,Min Sun,Zhenjie Lun,Gaochao Liu,Yupeng Huang,Weibin Chen,Yuzhen Wang,Haozhang Huang,Qianyi Chen,Jialong Li,Zhiguo Xia
Broadband near-infrared (NIR) fiber arrays are highly desirable for multiplexed fluorescence endoscopic, however, there is a challenge for the development of miniature light sources with highly efficient broadband NIR emissions. Here the synthesis of a MgAl 2 O 4 :Cr 3+ nanocrystal-glass composite (NGC) with an Cr 3+ -clusters-induced broadband NIR emission possessing is presented and external quantum efficiency of 44% and a full width at half maximum of 297 nm, and the NGC fiber is further fabricated through a template solidification strategy, resulting in the construction of an all-fiber coupling system by fusing them with commercial quartz fiber that achieves an optical coupling efficiency of 95.2%. Furthermore, these NGC fibers are regularly arranged into fiber bundle as an array light source to enhance NIR luminescence and imaging ability, and the fluorescence imaging of 4 mm biological tissue penetration is realized, as well as the multiplexed fluorescence imaging, under the irradiation of the NIR fiber bundle. This study provides general and efficient fiber fabrication guidelines toward NIR array light sources, opening the new routes for fluorescence endoscopes.
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Materials Today Communications
·
2024
·
IF 3.7
Chensi Zeng,Yanfang Gong,Chenxi Qi,Xianghua Zeng,Ni Tan
Capecitabine (CAP) is a kind of prodrug that can be metabolized into 5-fluorouracil (5-FU) in vivo, so it is usually classified as the antimetabolite fluoropyrimidine deoxynucleoside analog. In this paper, CAP, upconversion nanoparticles (UCNPs), 3,5-dicarboxy-4-methacrylate-based azobenzene (MAPDIA)/acrylic acid-functionalized gelatin, N,N′-methylene bisacrylamide (MBA), and ammonium persulfate (APS) were used as template, light trigger, bifunctional monomers, cross-linking agent and initiator, respectively. By using the free-radical polymerization and the molecular imprinting technique, the potential drug delivery nanocontainer CAP-MIP with the dual-responsive performance to pH/near infrared light (NIR) was successfully prepared. Furthermore, the characterization of CAP-MIP was also carried out by the modern instrumental analysis such as FTIR, XRD, TGA, BET and so on. The stimulus-responsive release experiment in vitro indicated the maximum cumulative release rate of CAP changed from 1.71 % to 89.54 % when the pH value in medium varied from 1.2 to 8.3, and the equilibrium release time point also greatly prolonged to 420 min from 40 min, respectively. When irradiated by 980 nm monochromatic NIR light in the same solution of pH 6.8, the maximum release rate of the sample could reach 96.21 % at 180 min, which respectively corresponded to the data of 41.84 % at 420 min under the condition of the absence of additional NIR light. In addition, CAP-MIP also had the excellent specific adsorption for CAP with the selectivity factor of 2.904 and the maximum CAP-loaded capacity of 7 mg•g −1 . The above information denoted the target material should be of some potential in drug delivery system application.
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Heliyon
·
2024
·
IF 3.4
Feifei Sun,Yao Xiao,Lili Kong,Haibo Mu,Xing Wang,Jinyou Duan
The consequences caused by bacterial resistance are becoming more and more serious. The rate of antibiotic development is far behind the rate of bacterial resistance, so it is urgent to develop a new drug system. In this study, photoresponsive nanogels based on hyaluronic acid were prepared and loaded with ciprofloxacin as a model molecule. The results showed that the nanogels had the advantages of high stability and good cytocompatibility. The inhibition effect of drug-loaded nanogels after light irradiation on the growth of Staphylococcus aureus and Salmonella typhimurium was significantly better than that before light irradiation, and ciprofloxacin could be released on demand and in control. This strategy is of great significance to reduce the unnecessary use of antibiotics and weaken bacterial resistance.
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ACS Nano
·
2024
·
IF 15.8
Sen Jin,Zuhao Shi,Ruige Wang,Yitong Guo,Libo Wang,Qianku Hu,Kai Liu,Neng Li,Aiguo Zhou
Highly active and low-cost co-catalysts have a positive effect on the enhancement of solar H2 production. Here, we employ two-dimensional (2D) MBene as a noble-metal-free co-catalyst to boost semiconductor for photocatalytic H2 production. MoB MBene is a 2D nanoboride, which is directly made from MoAlB by a facile hydrothermal etching and manual scraping off process. The as-synthesized MoB MBene with purity >95 wt % is treated by ultrasonic cell pulverization to obtain ultrathin 2D MoB MBene nanosheets (∼0.61 nm) and integrated with CdS via an electrostatic interaction strategy. The CdS/MoB composites exhibit an ultrahigh photocatalytic H2 production activity of 16,892 μmol g–1 h–1 under visible light, surpassing that of pure CdS by an exciting factor of ≈1135%. Theoretical calculations and various measurements account for the high performance in terms of Gibbs free energy, work functions, and photoelectrochemical properties. This work discovers the huge potential of these promising 2D MBene family materials as high-efficiency and low-cost co-catalysts for photocatalytic H2 production.
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