Journal of Materials Chemistry B
·
2025
·
IF 5.7
Jiahao Ling,Chu-Ming Pang,Yingxin Tan,Liangzhi Hong
Antibacterial photodynamic therapy offers a promising approach to combating both susceptible and multidrug-resistant pathogens. However, conventional photosensitizers have limitations in terms of poor binding specificity and weak penetration for pathogens. In this study, we developed synergistic photobactericidal polymers that integrate hydrophilic toluidine blue O (TBO) with the lipophilic penetration enhancer citronellol (CT). The CT-containing monomer was copolymerized with glycidyl methacrylate, and then TBO was introduced via the epoxy group's ring-opening reaction. By combining the cationic charge and singlet oxygen (1O2) generation abilities of TBO with citronellol's membrane disrupting ability, the resulting copolymers have enhanced antimicrobial efficacy against Gram-positive, Gram-negative, and multidrug-resistant bacteria. CT not only enables the polymer to self-assemble and enhances the interaction between the polymer and bacteria, but also promotes the accumulation of TBO within cells by improving membrane permeability. 1O2 generated in specific subcellular regions maximize photodynamic therapy's therapeutic potential. Furthermore, these copolymers can be used to develop light-activated antimicrobial polydimethylsiloxane that prevents bacterial adhesion and enables on-demand disinfection.
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高影响因子
JOURNAL OF WUHAN UNIVERSITY OF TECHNOLOGY-MATERIALS SCIENCE EDITION
·
2025
·Vol. 40
·期 4
·905-913
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IF 1.1
Pang Zengyuan,Gao Pengxiang,Meng Haonan,Cheng Zhenyu,Li Shen,Zhu Yanan
One-dimensional titanium dioxide (TiO 2 ) whiskers with controllable aspect ratios were synthesized by molten salt method adopting anatase TiO 2 nanoparticles as precursor, sodium chloride (NaCl) and dibasic sodium phosphate (Na 2 HPO 4 ) as medium. The particle size of TiO 2 nanoparticles and ratio of precursor and medium that can help to generate high aspect ratio TiO 2 whiskers were studied and selected. Light-colored antimony-doped tin oxide @ titanium dioxide (ATO@TiO 2 ) conductive whiskers were prepared by coating ATO on TiO 2 whiskers through coprecipitation then. Finally, the ATO@TiO 2 light-colored conductive whiskers were dispersed in polyacrylonitrile (PAN) to fabricate light-colored conductive fibers. The experimental results show that the ATO@TiO 2 whiskers exhibits ideal whiteness and conductivity with 65.5 Wb and 106 Ω·cm, respectively, and the resistivity of conductive fibers was 6.07×10 6 Ω·cm with 15wt% whisker content.
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JOURNAL OF ALLOYS AND COMPOUNDS
·
2025
·
IF 6.3
Enbei Yang,Han Ma,Peng Ren,Wenting Liu,Mengyan Yang,Jing Wan,Yurong Guo,Qiang Zhou,Zhengliang Wang
The growing demand of high-performance near-infrared (NIR) phosphors has sparked significant globe interest. In this study, we present a thermally stable NIR-emitting fluoroperovskite phosphor, KMgF 3 :Cr 3+ , synthesized via a hydrothermal method through substitution of Mg 2+ with Cr 3+ . The physicochemical and spectroscopic properties, including crystal structure, bandgap, morphology, spectral feature, and photoluminescence thermal stability, were systematically investigated. Results reveal that KMgF 3 :Cr 3+ exhibits a broadband NIR emission spanning 600-1000 nm (peaking at 780 nm) under blue light excitation and demonstrates exceptional thermal stability, retaining 86% of its room-temperature emission intensity at 423 K. Leveraging these properties, we fabricated a prototype light-emitting diode by coupling the KMgF 3 :Cr 3+ phosphor with a blue InGaN chip. The resulting device enabled high-contrast night vision imaging and clear visualization of human palm veins, highlighting its potential for advanced spectroscopic applications.
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ACS Applied Materials & Interfaces
·
2025
·
IF 8.2
Hong Qian,Binxia Yuan,Yuhao Liu,Rui Zhu,Chengxi Zhang,Hexing Li
Photocatalytic CO2 reduction to renewable fuels presents a promising strategy to mitigate greenhouse effects, yet challenges persist in achieving high efficiency due to CO2’s thermodynamic stability and competitive H2O adsorption. Herein, we develop a superhydrophobic photochromic TiO2/Bi2Wo6 (TBW-2O) nanocomposite that synergistically enhances visible-light-driven CO2 reduction. Dynamic charge management via reversible W6+↔W5+ transitions not only suppresses charge recombination but also facilitates electron transfer for CO2 activation, as evidenced by in situ XPS and EPR. The superhydrophobic surface designed with sodium oleate (water contact angle >150°) selectively enriches CO2 at the active sites compared to H2O (ΔGCO2 = −2.88 eV vs ΔGH2O = −1.17 eV). Dual heterojunction effects (Type II + Z-scheme) between TiO2 and Bi2WO6 optimize light absorption and redox potentials. The optimized TBW-2O achieves exceptional CH4 and CO production rates of 48.09 and 37.40 μmol·g–1·h–1, respectively, representing 19.7- and 6.6-fold enhancements over pure TiO2. Notably, it attains an apparent quantum yield (AQY) of 0.35% (CH4) and 0.32% (CO) at 350 nm without sacrificial agents or noble metals. Combined experimental and theoretical analyses reveal that the W6+/W5+ redox cycle and hydrophobic interface collaboratively promote COOH/CHO intermediate formation, steering the reaction pathway toward CH4. This work provides a design blueprint for multifunctional photocatalysts integrating photochromism and surface wettability control.
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NEW JOURNAL OF CHEMISTRY
·
2024
·Vol. 48
·期 19
·8886-8895
·
IF 2.7
Keyu Li,Miaoqing Liang,Fanglan Guan,Mei Zhang,Jinmei Nie,Lihong Bao
TiO2/rGO (TG) composites were synthesized using a hydrothermal reduction method, with titanium dioxide and graphene as the starting materials. Subsequently, dye-sensitizing titanium dioxide/graphene photocatalytic composites, named DTG and APTG, were prepared by covalently attaching C.I. Direct Black 17 or C.I. Acid Violet 3 dye onto TG. The composites were characterized using FTIR, TEM, UV-vis DRS, EDS, and Raman spectroscopy. The EDS surface scanning results of APTG and D2.70TG composites have shown that Ti and S atoms are uniformly distributed on the graphene sheets. The presence of characteristic peaks for S2p and N1s near 166 eV and 399 eV in D2.70TG and APTG was intensified compared to those of TG composites. The grafting rate reached its peak when the amount of C.I. Direct Black 17 was 2.70 and the fixed amount of TG was 0.1 g. The UV-vis diffuse reflectance spectroscopy study results demonstrated a shift in the response range to visible light after dye modification for DTGs and APTG. Photocatalytic experiments showed that D2.70TG was capable of removing over 99% of MB within 1 hour. Furthermore, after 5 cycles of photocatalytic experiments, the removal rate of MB remained at above 95%.
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Nano Research
·
2024
·
IF 9.5
Guo Xu,Song Liru,Wang Wenyu,Li Fengfeng,Ha Minh Ngoc,Tang Jun,Ling Qiang,Cui Ping,Ke Qingping
Heterogeneously catalyzed liquid oxidation of olefins with O 2 provides an alternative way for synthesizing high-value added chemicals. Herein, we report a straightforward urea-redox and sol-gel process for synthesizing LaCo x Cu 1− x O 3 for aerobic photo-oxidation of cyclohexene. Our research highlights a marked increase in the proportions of Co 2+ and Cu + species in a low chemical state, as well as enhanced visible light absorption through this method. Mechanistic investigations suggest that the catalytic process, particularly with LaCo 0.7 Cu 0.3 O 3 , involves a radical pathway mediated by reactive oxygen species. The presence of Cu + /Co 2+ species and surface oxygen vacancies is proposed to boost O 2 adsorption and activation on the catalyst, facilitating the formation of 2-cyclohexene-1-hydroperoxides. Furthermore, Cu 2+ /Co 3+ species are thought to aid in generating cyclohexene-derived radical species. The efficient aerobic oxidation of cyclohexene on LaCo 0.7 Cu 0.3 O 3 catalyst relies on the formation of reactive oxygen species and carbon radicals, facilitated by its strong visible light illumination. It achieves a cyclohexene conversion of 89.4% and selectivity to cyclohex-2-ene-1-one of 72.2%, along with stable recyclability after six reuses. The creation of nano-structured LaCo x Cu 1− x O 3 through the urea-redox and sol-gel process offers a promising avenue for the development of highly efficient catalysts for the aerobic photo-oxidation of cyclohexene to cyclohex-2-ene-1-one in the future.
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Journal of Water Process Engineering
·
2024
·
IF 6.3
Qingke Zhang,Guoqing Li,Zhifei Ma,Jianxin Chen,Yuntao Luo,Liwang Peng
Although numerous studies on peroxydisulfate (PS) activation with catalysts, organic pollutants acting as photosensitizers to activate peroxydisulfate in heterogeneous systems are rare. In this study, a visible light-induced activation system was developed for persulfates, using toluidine blue as a photosensitizer and MgFe-LDH as a heterogeneous catalyst. The results showed that toluidine blue can be photoexcited by visible light to produce photoelectrons, while MgFe-LDH acts as a photoelectron acceptor to promote persulfates synergistically. Non-radical 1 O 2 is the dominant active species in these systems, although its generation pathway is different when the oxidants are peroxymonosulfate and peroxodisulfate, respectively. As a result, >98 % self-degradation of toluidine blue was achieved within 60 min. Toluidine blue sensitization can provide electrons for the heterogeneous catalytic process and reduce metal precipitation, thus MgFe-LDH can show high catalytic stability in persulfates activation processes. In addition, the feasibility of photosensitized toluidine blue activated persulfates for the degradation of organic pollutants was explored using tetracycline hydrochloride as a model pollutant. The removal efficiencies of tetracycline hydrochloride were 75.7 % and 76.0 % in the PMS and PDS systems, respectively, after reaction time at 60 min under laboratory visible light. When the system was exposed to sunlight, these removal efficiencies were 70.1 % and 73.4 % for tetracycline hydrochloride, respectively.
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Nature Communications
·
2025
·Vol. 16
·期 1
·1-9
·
IF 15.7
Wang Kai,Hu Yanjun,Liu Xiufan,Li Jun,Liu Bin
Strain engineering offers an attractive strategy for improving intrinsic catalytic performance of a heterogeneous catalyst. Herein, we successfully create strain into layered indium sulfide (In 2 S 3 ) at atomic scale via introducing oxygen coordination and sulfur vacancy using a wet-chemistry method. The atomically strained In 2 S 3 exhibits greatly enhanced CO 2 photoreduction performance, achieving a CO 2 to CO conversion rate of 5.16 μmol g catalyst −1 h −1 under visible light illumination in ambient air. In-situ spectroscopic measurements together with theoretical calculations indicate that the atomically strained In 2 S 3 features lattice disordered defects on surface, which provides rich uncoordinated catalytic sites and induces structural distortion, resulting in modified band structure that promotes CO 2 adsorption/activation and boosts photogenerated charge carriers’ separation during CO 2 photoreduction. This work provides a new approach for the rational design of atomically strained photocatalysts for CO 2 reduction in ambient air.
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RSC Advances
·
2024
·Vol. 14
·期 10
·6874-6882
·
IF 3.9
Chongrui Xu,Ping Xue,Rui Li,Juan Jia,Linmeng Ma,Peng Li
The demand for H2O2 restricts the wider application of horseradish peroxidase (HRP) in degradation. In this work, a novel photoenzyme synergistic catalytic system was developed for high-efficiency degrading of indole in water by HRP without extra H2O2. The HRP was immobilized on CN-ZIF prepared by the combination of g-C3N4 and ZIF-8 to achieve photo-peroxidase catalyst HRP/Zn-CN-ZIF. Under visible light, photogenerated electrons and H2O2 from HRP/Zn-CN-ZIF participated in the biocatalytic cycle of HRP directly. As a result, the indole at 20 mg L−1 in water was degraded completely in 2 h by the HRP/Zn-CN-ZIF photoenzyme synergistic catalytic system without the addition of H2O2. Furthermore, HRP/Zn-CN-ZIF exhibited superior visible light absorption and charge transfer ability compared to g-C3N4. The results of the mechanism studies suggest that ·OH would play the most significant role from the HRP/Zn-CN-ZIF in indole degradation. This research provides an efficient approach for the removal of indole from water environments.
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JOURNAL OF ALLOYS AND COMPOUNDS
·
2025
·
IF 6.3
Shu Wang,Yongxin Jiao,Du Peng,Wenlong Yang,Hui Zhang,Shuang Han
There is growing interest in developing artificial-photosynthesized S-scheme heterostructures in photocatalytic applications. Herein, we proposed a Zn 0.5 Cd 0.5 S/WO 3 S-scheme heterostructure, possessing the trifunctionally catalytic applications of H 2 production in water-splitting, heavy metal photoreduction degradation, and antibiotic photooxidation degradation. We have chosen the optimized component to construct this heterostructure according to the best catalytic performance of Zn 1-x Cd x S solid solutions. These heterojunction composites have been prepared by traditional two-step hydrothermal method, subsequently their heterojunction construction, the photophysical transfer process of photogenerated carriers, and the photocatalytic reaction mechanism have been revealed by systemically characterizations and theoretical simulation calculations. These findings provide new insight into photocatalytic function expansion and the mechanism of photocatalytic activity improvement guided by photophysical processes.
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Advanced Science
·
2022
·Vol. 9
·期 22
·2201844
·
IF 17.521
Zong-Tao Li,Hong-Wei Zhang,Jia-Sheng Li,Kai Cao,Ziming Chen,Liang Xu,Xin-Rui Ding,Bin-Hai Yu,Yong Tang,Jian-Zhen Ou,Hao-Chung Kuo,Hin-Lap Yip
Tandem structures with different subpixels are promising for perovskite-based multicolor electroluminescence (EL) devices in ultra-high-resolution full-color displays; however, realizing excellent luminance- and color-independent tunability considering the low brightness and stability of blue perovskite light-emitting diodes (PeLEDs) remains a challenge. Herein, a bright and stable blue gallium nitride (GaN) LED is utilized for vertical integration with a green MAPbBr 3 PeLED, successfully achieving a Pe-GaN tandem LED with independently tunable luminance and color. The electronic and photonic co-excitation (EPCE) effect is found to suppress the radiative recombination and current injection of PeLEDs, leading to degraded luminance and current efficiency under direct current modulation. Accordingly, the pulse-width modulation is introduced to the tandem device with a negligible EPCE effect, and the average hybrid current efficiency is significantly improved by 139.5%, finally achieving a record tunable luminance (average tuning range of 16631 cd m −2 at an arbitrary color from blue to green) for perovskite-based multi-color LEDs. The reported excellent independent tunability can be the starting point for perovskite-based multicolor EL devices, enabling the combination with matured semiconductor technologies to facilitate their commercialization in advanced display applications with ultra-high resolution.
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ACS Applied Nano Materials
·
2024
·
IF 5.3
Senyi Gong,Mengdi Shang,Runnan Shao,Sen Li,Li He,Yanfei Cai,Teng Wang,Jian Jin,Zhaoqi Yang
Chemotherapy as a primary treatment for breast cancer is limited due to drug resistance in clinical treatment. The rapid proliferation and invasive biological properties of breast cancer, resulting in intratumoral hypoxia and adaptive antioxidation, are common manifestations of drug-resistant breast cancer. Photodynamic therapy is a potential strategy to overcome drug resistance, but its effectiveness is often limited by tumor hypoxia. In order to overcome the problem of tumor hypoxia and improve the effectiveness of photodynamic therapy, a strategy that employs ZIF-90 nanoparticles simultaneously delivering a hypoxia-induced drug (TPZ) and photosensitizer Ce6 labeled antisense nucleic acid (Ce6-G3139) into breast cancer cells was developed. Owing to the pH responsiveness of ZIF-90, TPZ and Ce6-G3139 are able to be efficiently released inside the tumor microenvironment. First, Ce6-G3139 can perform gene therapy, downregulating the expression of antiapoptotic protein BCL-2 and accelerating cell apoptosis. On the other hand, photosensitizer Ce6 can undergo photodynamic therapy (PDT), producing reactive oxygen species that interfere with the apoptosis mechanism of cells. More importantly, although the continuous consumption of oxygen in PDT aggravates the hypoxic environment of the tumor, the hypoxic-induced chemotherapy drug was further activated. Our research results indicate that the designed strategy targeting the hypoxic microenvironment of drug-resistant breast cancer exhibits significant anticancer effects both in vitro and in vivo, favoring the development of a PDT treatment paradigm that is effective against drug resistance under hypoxic conditions.
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