ACS Earth and Space Chemistry
·
2020
·
IF 3.418
Bo You,Siyang Li,Narcisse T. Tsona,Jianlong Li,Li Xu,Zhaomin Yang,Shumin Cheng,Qingcai Chen,Christian George,Maofa Ge,Lin Du
Fatty alcohols are known surfactants that are ubiquitous in the environment. They affect the physical, chemical, and optical properties of aerosols and air–water interfaces. However, little is known about their photochemistry. Brown carbon (BrC), as a photosensitizer, might initiate photochemical reactions of such nonphotoactive surfactants. Here, BrC was obtained by evaporating mixtures of methylglyoxal with ammonium sulfate or glycine (Gly). The photosensitization ability of BrC was evidenced through its reaction with 1-octanol under UV irradiation by means of attenuated total reflection–Fourier transform infrared spectrometry, which is a surface-sensitive technique. The condensed phase products were determined by gas chromatography–mass spectrometry. We found that a series of functionalized and unsaturated compounds were formed through photosensitized reaction, and more highly oxygenated compounds appeared after a long illumination time. This process contributes to the formation of reactive volatile and semi-volatile organic species and could further trigger secondary chemistry. The reaction is probably initiated by electronically excited BrC upon exposure to UV irradiation. A possible mechanism for the photosensitized degradation of fatty alcohols is proposed. We also observed that BrC can be easily photobleached and hence has a limited effect on the radiative forcing. However, BrC can play an important role in photochemistry on aerosols and air–water interfaces.
研究领域:
环境科学
·
大气化学
·
光化学
✓ 已验证
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2025
·
IF 5.6
Entao Zheng,Haiqing Li,Zhichuan Li,Runze Liu,Yi Guo,Shuming Wang
The development of novel, highly efficient, and stable photocatalysts remains a formidable task. Herein, novel peanut-shaped carbon-doped hydroxyapatite (CHAp) was synthesized via a non-hydrolytic sol-gel method at low temperature, and the revelation of a novel “adsorption-in-situ photosensitization” mechanism. Comprehensive structural characterization revealed that carbon doping modulates the crystalline growth orientation, resulting in a distinct peanut-shaped morphology and optimized textural properties, including an increased specific surface area and a reduced average pore size. These structural alterations endow CHAp with enhanced adsorption capacity for tetracycline (TC). The TC-CHAp complex formed via post-adsorption surface coordination exhibits a narrowed band gap, which enhances its visible-light responsiveness. Furthermore, the established p-n heterojunction between TC-CHAp and CHAp facilitates photoinduced charge separation and transfer, enhancing photocatalytic efficiency. The ESR test results proved that the ·O 2 − radical in the reaction system promoted the degradation of TC. Experimental results demonstrate that under dark conditions, the 100 mg samples achieved 68 % adsorption efficiency for TC (50 mg/L, 100 mL) within 60 min, while exhibiting 93.6 % degradation efficiency after 30 min of visible light irradiation. The material maintained 82.7 % degradation efficiency through six consecutive cycling tests, demonstrating excellent stability and reusability for repeated usage. Therefore, this study has expanded the application scope of non-hydrolysis processes and provided a promising approach for the development of novel green photocatalysts with high adsorption capacity and photocatalytic efficiency.
研究领域:
材料科学
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环境化学
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光催化
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纳米材料
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污染治理
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表面化学
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无机非金属材料
✓ 已验证
产品关联
DOI
高影响因子
ATMOSPHERIC ENVIRONMENT
·
2025
·
IF 3.7
Yixuan An,Lingdong Kong,Beibei Liu,Jiandong Shen,Yu Lu,Yuwen Wang,Jie Tan,Lin Wang
The heterogeneous conversion of SO 2 plays a crucial role in atmospheric sulfate formation. In recent years, it has been recognized that light-absorbing brown carbon can generate reactive oxygen species and enhance the oxidative capacity of the atmosphere. However, the influence of atmospheric brown carbon on the heterogeneous conversion of SO 2 on mineral oxide surfaces has not yet achieved sufficient attention. In this study, the impact of imidazole-2-carboxaldehyde (2-IC), a ubiquitous atmospheric brown carbon, on the heterogeneous conversion of SO 2 on hematite particle surfaces was investigated in the absence and presence of simulated solar irradiation by using in situ diffuse reflectance infrared Fourier transform spectroscopy (DRIFTS). Results indicated that 2-IC can significantly influence the heterogeneous reactivities of hematite. Under dry conditions, the heterogeneous reactivities decreased with the increase of the loaded 2-IC mass fraction in the absence of light, but in the presence of light, the higher reactivities were observed at an appropriate mass fraction range of 2-IC when compared to pure hematite, showing the promoting effects in this mass fraction range. Under the condition of 58% relative humidity, the heterogeneous reactivities in the absence of light decreased with the increasing mass fractions of 2-IC, and pure hematite showed the highest reactivity. However, in the presence of light, the heterogeneous reactivities increased first and then decreased with the increasing mass fractions of 2-IC, and the mixture containing 1×10 -4 % 2-IC showed the highest reactivity. Water molecules can renew surface reactive sites and facilitate the photosensitization reaction of 2-IC, and further enhance sulfate formation. A possible mechanism for the impact of 2-IC on the heterogeneous conversion of SO 2 on hematite is proposed. This study reveals a new pathway for brown carbon to enhance SO 2 conversion and sulfate formation in the atmosphere, providing new insights into its atmospheric impact.
研究领域:
大气化学
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环境科学
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物理化学
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光化学
✓ 已验证
产品关联
DOI
高影响因子
FOOD HYDROCOLLOIDS
·
2022
·
IF 11.504
Jingjing Ding,Yunxing Li,Qiubo Wang,Linqian Chen,Yi Mao,Jie Mei,Cheng Yang,Yajuan Sun
Herein, we reported the use of natural, renewable, and food-grade Spirulina protein isolate nanoparticles (SPI NPs) as effective particle stabilizers for Pickering high internal phase emulsions (Pickering-HIPEs). SPI NPs were prepared using a straightforward antisolvent technique and characterized using dynamic light scattering (DLS), and zeta potential measurement as well as scanning electron microscopy (SEM). SPI NPs were afterward used as sole stabilizers to prepare the oil-in-water (O/W) HIPEs, the effects of oil content, particle concentration, and pH of aqueous phase on the microstructure, stability, and rheological behaviors of the resulting Pickering-HIPEs were investigated. The Pickering-HIPEs generated showed a self-supporting gel network, a high oil content (up to 85 vol %), and extraordinary storage stability after prolonged storage and UV exposure. Concurrently, the Pickering-HIPEs provided good UV protection for a variety of photosensitive compounds, including β -carotene, vitamin E , and limonene. These findings would not only advance the development of biocompatible particle stabilizers for Pickering-HIPEs in cosmetic, food , and pharmaceutical industries, but they would also provide a guidance for the protection of photosensitive compounds.
研究领域:
化妆品
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食品科学
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药学
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材料科学
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纳米技术
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
·
2020
·
IF 9.038
Qian Liu,Tingyan Shi,Yong Cheng,Zuorui Wen,Caifeng Ding,Yaqi Li,Kun Wang
Developing effective analytical method for sulfadimethoxine (SDM) detection is highly desirable and vitally crucial for protecting environment safety and human health. Herein, a highly selective and sensitive photoelectrochemical (PEC) aptasensor for accurate detection of SDM was proposed, which employed zinc phthalocyanine/graphitic carbon nitride (ZnPc/CN) nanocomposite as photosensitive material. The ZnPc/CN nanocomposite was constructed by modification of CN nanosheet with visible/near-infrared light responsive photosensitizer ZnPc. The introduction of ZnPc into CN exhibited amplified PEC response, which was 5.7 and 18.3 times than pure ZnPc and CN, attributed to the enhanced light harvesting ability and improved photoelectric conversion efficiency of such nanocomposite. By using ZnPc/CN and sulfadimethoxine (SDM) aptamer as PEC response material and specific probe, a PEC aptasensor was established for SDM detection. The aptamer was connected to the surface of chitosan/ZnPc/CN/ITO through the formation of phosphoramidate bonds between the amino group of the chitosan and phosphate group of the aptamer at 5′ end. The fabricated aptasensor displayed good detection linearity of 0.1 ~ 300 nM and low detection limit of 0.03 nM (S/N = 3) under optimized conditions, and the potential applicability of the PEC aptasensor was confirmed by detecting SDM in milk powder samples.
研究领域:
分析化学
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环境科学
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材料科学
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生物技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Small
·
2022
·Vol. 18
·期 20
·2200178
·
IF 15.153
Lunjie Huang,Da-Wen Sun,Hongbin Pu
Metal-organic frameworks (MOFs) are a versatile toolbox for the bioinspired design of nanozymes for antibacterial applications and beyond, however, designing a nanozyme by the hierarchical quasi-MOF scheme remains largely unpracticed. This work exemplifies the preferential structure-activity correlation of a bimetallic quasi-MOF (Q-MOF Ce0.5 ) among three series of MOF-derived peroxidase (POD) mimics. The biomimetic quasi-MOF Ce0.5 nanosheets accommodate both oxygen vacancy-coupled multivalent redox cycles and photosensitive energy band layout, benefiting from the hierarchical heterojunction-like 0D/2D interface featuring isolated nodes-derived Ce O Cu sites upon the 2D decarboxylated MOF scaffold. These integrated unique merits enable the POD-like Q-MOF Ce0.5 to generate sustained reactive oxygen species to effectively eradicate the surface-adhered bacteria under visible light, resulting in significant inactivation of Escherichia coli (99.74 %) and Staphylococcus aureus (99.35%) in vitro, and potent disinfection of skin wounds in vivo in safe and on-demand manners. It is hoped that this work can intensify the interventions of MOF nanozymes against the microbial world.
研究领域:
纳米技术
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生物催化
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抗菌材料
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材料科学
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生物工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CERAMICS INTERNATIONAL
·
2021
·
IF 4.527
Shunhang Wei,Jian Gao,Pingru Wu,Bo Yao,Haitao Xu,Yongsheng Tan,Shiyan Liu,Rong Wu,Yawei Wang,Lei Wang,Zebo Fang,Qifeng Liang
Although TiO 2 is a wide band gap semiconductor , it demonstrates photodegradation activity under visible light irradiation after dye sensitization. Compared with esterification between the surface hydroxyl group of TiO 2 and the carboxylic group of dyes, electrostatic interaction between TiO 2 and dye shows better photosensitized performance. In this work, Bi/Al co-doping anatase titania (Ti 1-x Bi 2x/3 Al 2x/3 O 2 (0 ≤ x ≤ 0.3)) is designed to enhance the electrostatic interaction. The effect of Al ions is to enhance the solubility of Bi 3+ into titania nanocrystals . A new band gap is generated after high concentration of Bi element doping , which not only promotes the absorption of visible light, but also improves the utilization of photogenerated carriers. Based on the results of transmission electron microscopy , light absorption, photodegradation activity and density functional theory calculations, it is found that bismuth dopant is the electron capture site. It first accumulates electrons through photocatalytic degradation reaction to enhance electrostatic adsorption between the catalyst and the positively charged dye molecules, and finally realizes high-efficiency photosensitization degradation of Rhodamine B. In addition, the sensitized titania has excellent photodegradation recyclability.
研究领域:
材料科学
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光化学
·
环境科学
✓ 已验证
DOI
高影响因子
JOURNAL OF MEDICINAL CHEMISTRY
·
2024
·
IF 6.8
Li Wei,Rajesh Kushwaha,Tumpa Sadhukhan,Haorui Wu,Anyi Dao,Zhishang Zhang,Haotu Zhu,Qiufang Gong,Jiaxi Ru,Chao Liang,Pingyu Zhang,Samya Banerjee,Huaiyi Huang
The design of the dinuclear Ru(II) complex (Ru2) with strong near-infrared (NIR) absorption properties has been reported for efficient anticancer phototherapy. Under 700 nm LED light excitation, Ru2 exhibited remarkable synergistic type I/II photosensitization ability and photocatalytic activity toward intracellular biomolecules. Ru2 showed impressive 700 nm light-triggered anticancer activity under normoxia and hypoxia compared with the clinically used photosensitizer Chlorin e6. The mechanistic studies showed that Ru2 induced intracellular redox imbalance and perturbed the energy metabolism and biosynthesis in A549 cancer cells. Overall, this work provides a new strategy for developing efficient metal-based complexes for anticancer phototherapy under NIR light.
研究领域:
化学
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药学
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肿瘤学
·
生物物理学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Advanced Healthcare Materials
·
2024
·
IF 10
Anyi Dao,Shiyan Chen,Li Pan,Qingyan Ren,Xun Wang,Haorui Wu,Qiufang Gong,Zeduan Chen,Shaomin Ji,Jiaxi Ru,HaoTu Zhu,Chao Liang,Pingyu Zhang,Haiping Xia,Huaiyi Huang
Photoactivable chemotherapy (PACT) using metallic complexes provides spatiotemporal selectivity over drug activation for targeted anticancer therapy. However, the poor absorption in near-infrared (NIR) light region of most metallic complexes renders tissue penetration challenging. Herein, an NIR light triggered dinuclear photoactivable Ru(II) complex ( Ru2 ) is presented and the antitumor mechanism is comprehensively investigated. The introduction of a donor–acceptor–donor (D–A–D) linker greatly enhances the intramolecular charge transition, resulting in a high molar extinction coefficient in the NIR region with an extended triplet excited state lifetime. Most importantly, when activated by 700 nm NIR light, Ru2 exhibits unique slow photodissociation kinetics that facilitates synergistic photosensitization and photocatalytic activity to destroy diverse intracellular biomolecules. In vitro and in vivo experiments show that when activated by 700 nm NIR light, Ru2 exhibits nanomolar photocytotoxicity toward 4T1 cancer cells via the induction of calcium overload and endoplasmic reticulum (ER) stress. These findings provide a robust foundation for the development of NIR-activated Ru(II) PACT complexes for phototherapeutic application.
研究领域:
癌症治疗
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光疗
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无机化学
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材料科学
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生物医学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
WATER RESEARCH
·
2021
·
IF 11.236
Lixiao Wang,Yajie Zheng,Yiran Zhou,Junhe Lu,Jean-Marc Chovelon,Yuefei Ji
Ketoprofen (KTF) is a nonsteroidal anti-inflammatory drug frequently detected in natural and engineering waters. Because KTF is particularly photolabile (half-life ∼4 min), knowledge of the fate and ecological risks of KTF photoproducts in the aquatic environment is especially essential. Herein, we systematically investigated the photophysics, photochemistry , and photosensitization of KTF photoproducts in aqueous solution under 365 nm irradiation (UV 365 ). Results show that KTF photolyzed rapidly and formed 3-ethyl- α -hydroxylbenzophenone (EtOH-BP), 3-ethyl- α -hydroperoxylbenzophenone (EtOOH-BP), 3-acetylbenzophenone (AcBP), and 3-ethylbenzophenone (EtBP), as identified by liquid chromatography-tandem mass spectrometry (LC-MS/MS) and high-resolution mass spectrometry (HRMS). The presence of O 2 significantly affected the evolution of photoproducts during KTF photolysis. The photophysical properties of EtBP and AcBP were characterized by spectroscopic approaches. In particular, transient absorption spectra obtained by nanosecond laser flash photolysis (LFP) indicated that EtBP and AcBP were excited to triplet states with lifetimes of 28 and 2.4 µs, respectively. EtBP underwent further photodegradation , giving rise to EtOH-BP, EtOOH-BP, and AcBP upon UV 365 irradiation. The reaction is proposed to proceed through an excimer precursor ( 3 [EtBP···EtBP]*) followed by intramolecular H-abstraction. In contrast, AcBP was relatively photostable, particularly under aerated condition. Both EtBP and AcBP have strong photosensitizing activity, as evidenced by the triplet probe 4-( N,N -dimethylamino)benzonitrile (DMABN). ECOSAR program suggested that the photoproducts are more ecotoxic and bioaccumulative than the parent KTF. Results of this study underscore the need to scrutinize the formation and fate of KTF photoproducts in sunlit surface waters.
研究领域:
环境科学
·
光化学
·
毒理学
·
分析化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）