JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
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2021
·
IF 8.067
Mei Yu,Jing Shang,Yu Kuang
Graphene oxide (GO), a new and promising material, has been widely used as a co-catalyst in photocatalytic reactions; however, its capacity as a sole photocatalyst has rarely been investigated. In this study, ultraviolet (UV) light irradiation was used as a modification method to obtain reduced GO (rGO) samples. The samples were used as photocatalysts to examine their visible light photocatalytic activity toward hexavalent chromium (Cr(VI)) removal. Atomic force microscopy (AFM), X-ray diffraction (XRD), UV–vis spectrophotometry, Raman spectroscopy, X-ray photoelectron spectroscopy (XPS), and electron spin resonance (ESR) spectroscopy were applied to interpret the surface and structure changes with UV irradiation. The oxygen-containing functional groups (OFGs) on the GO surface were reduced to defective carbons and π-conjugated C=C (sp 2 domains) under UV light; this led to a decrease in the interlayer distance between GO sheets, GO fragmentation, and increased disorder on the GO surface. The restoration of sp 2 domains led to a narrower band gap of GO, which favored the rGO excitation by visible light to generate electron-hole pairs. The rGO pre-irradiated with UV for 1h (rGO-1), possessing the highest defect density and electron generation efficiency, exhibited the best Cr(VI) reduction efficiency, which was about three times that of the GO sample; moreover, it outperformed most of the reported GO-based nanomaterials. In addition, low pH and the addition of citric acid as a hole scavenger could further improve the photocatalytic activity. This study proves that GO or rGO can be used as a sole photocatalyst under visible light to remove environmental pollutants such as heavy-metal ions, and it paves the way for the development of this kind of material and its UV-irradiation modification for further applications.
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高影响因子
CHEMISTRY-A EUROPEAN JOURNAL
·
2022
·Vol. 28
·期 68
·e202202044
·
IF 5.02
Hanghang Zhou,Ying Luo,Jun Xu,Lidan Deng,Zheng Wang,Hong He
Graphical The well-defined CaTaO 2 N single crystals with uniform particle size were successfully synthesized through a one-pot NaCl-assisted nitridation procedure. The performance of photocatalytic CO 2 reduction to CO by H 2 O under visible light was enhanced due to the high crystallinity of CaTaO 2 N and the modification with core-shell structured Ni−Ag bicomponent cocatalyst. Cubic-like CaTaO 2 N photocatalysts with high crystallinity and uniform particle size were successfully prepared by the flux-assisted nitridation method. The growth of CaTaO 2 N single crystals under different synthesis conditions was systematically investigated to understand the effects of the crystallinity and optical property on photocatalytic performance of CO 2 reduction. Moreover, the modification of CaTaO 2 N single crystals with core-shell Ni−Ag bicomponent cocatalyst by two-step decoration process gave a 2.4 times higher amount of CO evolution than the deposition of sole Ag cocatalyst, because of the synergistic effects of bicomponent cocatalyst on the interfacial electron transfer and surface catalytic process. This study provides a valuable way to construct high-crystalline photocatalysts with effective bicomponent cocatalyst for visible-light-driven CO 2 reduction with H 2 O.
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高影响因子
Journal of Materials Chemistry A
·
2021
·Vol. 9
·期 43
·24308-24314
·
IF 12.732
Mingyue Jiang,Yue Yuan,Yuchen Fang,Shouxin Liu,Jian Li,Zhijun Chen,Qiuying Pang,Shujun Li
Using light-harvesting materials to enhance natural photosynthesis is attracting much attention in both materials and plant research. The working efficiency of most light-harvesting materials is, however, compromised by a narrow light-harvesting range (either ultraviolet (UV) only, or near-infrared (NIR) only) and a short lifetime of the excited state. We have now developed a new light-harvesting material (UCNP@CDs) from upconverting nanoparticles (UCNPs) and carbon dots (CDs), which has good photon up- and down-converting properties, because of the UCNPs and CDs, respectively. UCNP@CDs efficiently absorbed and converted both UV and NIR light to visible light, with a long lifetime for the excited state. UCNP@CDs was incorporated into a carboxymethylcellulose (CMC) matrix to produce a light-harvesting film that enhances natural photosynthesis, both by isolated chloroplasts and by living plants. Our rationally designed UCNP@CDs/CMC composite light-harvesting film was able to enhance photosynthesis by Arabidopsis thaliana by ∼12%.
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INORGANIC CHEMISTRY COMMUNICATIONS
·
2022
·
IF 3.428
Xiaojie Song,Xiufang Wang,Weiwei Dong,Qishu Qu,Haichen Wang,Fan Yang
Solar-to-chemical energy conversion via heterogeneous photocatalysis is one of the effective approaches to tackle the growing environmental and energy challenges. Homogeneously dispersed silver nanoparticles (Ag NPs) and cadmium sulfide nanoparticles (CdS NPs) with average particle size not>20 nm were fabricated on the surface of titanium dioxide nanotubes (TNTs) (Ag/CdS/TNTs) with the help of sodium dodecyl benzene sulfonate (SDBS). Herein, more surface active sites are created on the surface of nanocomposites. The experimental results demonstrate that the photocurrent intensity of the nanocomposites obviously increased, which effectively improves the photocatalytic activity. The results of photocatalytic experiments indicated that using triethanolamine (TEOA) and acetonitrile (MeCN) as sacrificial agents, the nanocomposites afford the CO yield from CO 2 (1455.6 μmol‧g −1 ‧h −1 ). Besides, Ag/CdS/TNTs nanocomposites displayed the H 2 evolution rate of 3700.57 μmol‧g −1 ‧h −1 , which was twice as much as pure TiO 2 NPs. The increase in the photocatalytic ability of the nanocomposites is basically attributed to the three materials formation S-scheme heterojunction which reduce the recombination probability of the photo-induced electrons and holes and thus enhances the photocatalytic activitys. Ultimately, a photocatalytic reaction mechanism is proposed for Ag/CdS/TNTs nanocomposites in the reduction of CO 2 .
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RSC Advances
·
2020
·Vol. 10
·期 21
·12423-12431
·
IF 3.119
Chanez Maouche,Yazhou Zhou,Jinjun Peng,Shuang Wang,Xiujuan Sun,Nasir Rahman,Piyaphong Yongphet,Qinqin Liu,Juan Yang
Three-dimensional (3D) graphene-based aerogels have attracted widespread interest as promising photocatalysts for dye degradation and hydrogen production. Herein, we have developed a 3D nitrogen-doped graphene aerogel (3DNG) from graphitic carbon nitride combined with graphene oxide (GO). The nitrogen dopant in the 3D aerogel was achieved via a thermal treatment at 1000 °C, and the 3D aerogel catalyst could retain its 3D porous structure after the thermal treatment. The 3DNG was characterized via FTIR, Raman, TEM, UV-vis, XPS spectroscopies and BET analysis, and the results indicated that this 3DNG with a large surface area of 536 m2 g−1 and a band gap of 2.42 eV demonstrated a high adsorption capacity and enhanced methylene blue degradation and hydrogen production under visible light irradiation. Characterization also identified that the porous 3D structure with hydrogen bonding and π–π interactions and better charge transfer resulting from the nitrogen doping are the major reasons for the enhanced photocatalytic performance over this 3DNG catalyst.
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高影响因子
Inorganic Chemistry Frontiers
·
2019
·Vol. 6
·期 11
·3057-3062
·
IF 5.934
Weixuan Zeng,Sheng Cao,Lulu Qiao,Anquan Zhu,Quanyin Ma,Xiewen Xu,Yi Chen,Jun Pan
In the present study, we report a one-step hydrothermal synthesis of visible-light response Cr-doped Sr2Ta2O7 nanosheets for photocatalytic hydrogen generation. It is discovered that the Cr ion is successfully doped into the Sr2Ta2O7 nanosheet crystal lattice and uniformly distributed without changing the crystal structure and morphology of the Sr2Ta2O7 host. Compared to pristine Sr2Ta2O7, the as-prepared Cr-doped Sr2Ta2O7 photocatalysts show enhanced photocatalytic activity for hydrogen generation under visible-light irradiation. The spectroscopy and Mott–Schottky results reveal that proper Cr doping can narrow the band gap of Sr2Ta2O7 as well as facilitate the separation of photo-generated electrons and holes, thus enhancing the photocatalytic performance under visible-light irradiation. This work provides a simple approach to fabricate visible-light active tantalum-based oxide photocatalysts.
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Journal of Materials Chemistry A
·
2025
·
IF 9.5
Li-Yuan Wu,Fei Zhang,Ming-Zhe Cai,Min Zhang,Tong-Bu Lu,Ping Li,Yong-Hua Chen
Z-Scheme heterojunctions with strong redox capability and efficient photoinduced carrier separation are critical for sunlight-driven CO2 conversion, yet their optimal structural arrangement remains to be improved. Herein, we report a 2D/2D CsPbBr3/SnS2 nanosheet hybrid system featuring an extensive interfacial contact area that facilitates photoinduced carrier transfer. The inbuilt electric field directs photoinduced electrons to accumulate on CsPbBr3, while holes migrate to SnS2, thereby enhancing their respective redox capabilities. This system achieves a maximum CO rate of 75.6 µmol g−1 h−1, representing a 32.8-fold and 3.5-fold improvement compared to pristine 2D SnS2 and CsPbBr3–OA, respectively. Electrochemical characterization reveals that interlayer hybridization synergistically enhances both interfacial carrier transfer and surface redox ability. The electrostatic assembly approach enables the controlled synthesis of various CsPbBr3/SnS2 composites with tunable SnS2 ratios, providing a generalizable strategy for the precise fabrication of dual crystal facet-exposed catalysts.
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高影响因子
Materials Today Chemistry
·
2025
·
IF 6.7
Fu Wang,Jiahui Wu,Qinuo Han,Liu Hu,Wo Nie
Light-harvesting systems play a pivotal role in the development of sustainable antimicrobial and self-heating artificial materials. Fabric-based artificial solar light-harvesting systems were constructed by designing the assemblies of a zinc(II) phthalocyanine photosensitizer (CAZnPc) and three different fluorescent dyes on the cotton fabric. The dye-mediated Förster resonance energy transfer (FRET) process and π–π stacking endow the modified fabric with exceptional antibacterial, photothermal, and luminescent performances. Under visible light irradiation (100 mW/cm 2 ), CF-ZP/Rh6G (the optimal heating performer) achieves a temperature of 64.5 °C (ΔT = 43.7 °C) within 100 s with an outstanding photothermal stability (<10 % efficiency decay after 5 cycles). CF-ZP/RhB exhibits a superior 1 O 2 generation capability (7.64-fold higher than that of CF-ZnPc). The synergistic photothermal–photodynamic effect enables CF-ZP/Rh6G to attain a 99.9999 % antibacterial efficacy against Staphylococcus aureus and Escherichia coli after 90 min of irradiation (30 mW/cm 2 ). Mechanistic study reveals that the performance variations observed for these fabrics arise from the different fluorescent dye molecular structures, causing different intermolecular forces, which modulate energy allocation pathways of photosensitizer to govern functionality. The assembly construction strategy offers a material platform for sunlight-powered wearable thermal management and medical protective applications.
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OPTICAL MATERIALS
·
2025
·
IF 4.2
Jing Yang,Ying Duan,Lixu Wang,Wangchuan Xiao,Qiao rong Ru,Peng Li,Shenjie Zhang,Zheng Sun
Host-guest systems of carbon dots (CDs) embedding in matrix with room-temperature afterglow (RTA) are of great importance for various applications, but so far rather limited due to relaying on high-energy ultraviolet (UV) excitation, monochromatic afterglow emission, or harsh synthesis. Herein, PTA materials (PASP@BA) with UV/visible light dual-mode excitation are prepared via one-step heat treatment of polyaspartic acid (PASP) and boric acid (BA). The RTA colors of PASP@BA display a significant bathochromic shift from blue to yellow as the excitation wavelength increases from 254 to 420 nm under ambient condition. Impressively, the visible-light-activated ultralong RTA can last for about 7 s by naked eye under ambient conditions. By correlating photophysical properties with structural characterization results, it is concluded that the polycrystalline boron oxide matrix and covalent B–C bonds can effectively suppress non-radiative transitions and stabilize the triplet excited state of CDs by restricting molecular motion and isolating environmental quenchers, thus facilitating the generation of long afterglow. More interestingly, the afterglow color can be also tuned by dynamic varying in B–C bond density and CDs dimensions. Finally, practical applications of such photo-responsive systems in multi-level information anti-counterfeiting and encryption are further demonstrated.
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Materials Today Nano
·
2025
·
IF 8.2
Yanan Zhang,Yijia Wang,Yujie Gao,Yangxi Cheng,Danfeng Jian,Yifan Sun,Xiaotong He,Dan Yu,Jindan Wu
Personal protective equipment (PPE) can significantly reduce the negative impact of emerging infectious diseases caused by pathogenic bacteria on public health and the global economy. However, conventional PPE without self-disinfection properties cannot kill the attached microorganisms efficiently, and may cause cross-contamination and environmental damage. Herein, an efficient aggregation-induced emission photosensitizer (AIE PS), ( E )-2-(3-cyano-5,5-dimethyl- 4-(4-(1,2,2-triphenylvinyl)-styryl)furan-2(5H)-ylidene)malononitrile (TPE-TCF), was in-situ packaged within hollow nanospheres of zeolitic imidazolate framework-8 (ZIF-8) by the assistance of sodium dodecyl sulfate (SDS), to prepare TPE-TCF/SDS@ZIF-8 nanoparticles (NPs). These NPs exhibited both high reactive oxygen species (ROS) production efficiency and good stability. Then, they were assembled onto a polyacrylonitrile/polyvinyl-pyrrolidone (PPP) electrospun nanofiber mats to form composite nanofiber mats TZ-PPP via a visible light-induced dopamine (DA)-assisted co-deposition method. The electrospun nanofiber mats serve as an efficient antibacterial nano-platform, providing more adsorption sites for the composite NPs, enabling the exposed composite NPs to interact with oxygen sufficiently, and maximizing their antibacterial efficacy substantially. Importantly, the TZ-PPP composite nanofiber mats retained the initial ultra-high ROS production efficiency and superior antibacterial performance of TPE-TCF/SDS@ZIF-8 NPs. Under the irradiation of low-power white light (400-830 nm, 50 mW cm -2 ), TZ-PPP nanofiber mats were able to remove more than 99.9% (10 min) and 99.0% (40 min) of bacteria and fungi, respectively, with significant photodynamic inactivation of microorganisms. This study is an exploration of the combination of AIE PS with nanofibers, whose outstanding photodynamic antibacterial properties provide new perspectives for the development of novel medical protective materials.
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高影响因子
JOURNAL OF LUMINESCENCE
·
2025
·
IF 3.6
Yingchun Ge,Tao Wu,Langping Dong,Zhiyu Qin,Jianghua Wu,Guangxiang Jiang,Guoying Zhao,Shuai Yang,Jingshan Hou,Yongzheng Fang
The development of full-spectrum white LEDs is significantly hindered by the “cyan gap” in the 470-510 nm spectral region. Addressing this gap with moderate -quality cyan-emitting phosphors, efficiently excited by violet LED chips, is crucial for achieving high color rendering index (Ra > 90) illumination. In this study, a novel and moderate efficient garnet-structured cyan-emitting phosphor Ca 2 LuZr 2 Al 1.5 Ga 1.5 O 12 :Ce 3+ (CLZAGO:Ce 3+ ) was effectively prepared via a high-temperature solid-state reaction route. When excited at 410 nm, the optimized CLZAGO:0.04Ce 3+ sample displays a robust cyan emission peaking at 484 nm, accompanied by a broad emission band spanning 420-650 nm and a full width at half-maximum (FWHM) of 90 nm, which efficiently fills the cyan gap commonly observed in conventional White light-emitting diodes (WLEDs). The phosphor exhibits available thermal stability, preserving 53% of its room-temperature emission intensity at 423 K, and achieves a moderate external quantum efficiency (EQE) of 45.43%. Finally, when CLZAGO:Ce 3+ was combined with commercial blue-emitting Sr 5 (PO 4 ) 3 Cl:Eu 2+ (SPOC:Eu 2+ ), green-emitting (Ba, Sr) 2 SiO 4 :Eu 2+ (BSSO:Eu 2+ ), and red-emitting CaAlSiN 3 :Eu 2+ (CASN:Eu 2+ ) phosphors and integrated into a 410 nm violet LED chip, a full-spectrum WLED with an enhanced Ra of 95 was achieved. These findings underscore the critical role of CLZAGO:Ce 3+ as a promising cyan-emitting component for next-generation high color-rendering full-spectrum WLEDs.
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SENSORS AND ACTUATORS B-CHEMICAL
·
2024
·
IF 8
Xiaoyan Huang,Wanlu Sun,Yanyan Zhu,Chao Zhao,Baojin Tan,Hai-Yan Wang,Yi Liu
Photodynamic therapy (PDT) could induce apoptosis by releasing reactive oxygen species (ROS) to treat tumor. Application of pH/light dual-activated nanoparticles could generate ROS in the acidic tumor microenvironment under 808 nm laser irradiation for precise treatment. L-arginine (L-Arg) triggered by ROS is an efficient nitric oxide (NO) donor for gas therapy. In addition, it is reported that peroxynitrite (ONOO - ) produced by rapid reaction of ROS and NO could sensitize PDT and induce apoptosis for synergistic treatment. Herein, we developed the L-Arg loaded pH/light dual-activated PEGylated photosensitizer for self-assembly into nanoparticles named Rho-Arg. As measured by fluorescence spectroscopy, the pKa of Rho-Arg was 5.5, which is suitable for applying in the tumor microenvironment. The nanoplatform was firstly activated under the acidic condition of tumor, and then illuminated by 808 nm laser to controllably release ROS, and sequentially produced NO and ONOO - . In conclusion, the Rho-Arg nanoplatform may provide a promising synergistic therapy tool for tumor treatment.
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