JOURNAL OF CHEMICAL TECHNOLOGY AND BIOTECHNOLOGY
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2019
·Vol. 95
·期 3
·862-874
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IF 2.659
Fei Rao,Gangqiang Zhu,Miaomiao Wang,Siyaka Mj Zubairu,Jianhong Peng,Jianzhi Gao,Mirabbos Hojamberdiev
BACKGROUND Photocatalysis is one of the effective ways to solve the problem of water and gas pollution. An excellent photocatalyst should have the following advantages: efficient photocatalytic activity for gas and water pollutants, recyclable and stable characteristics, non-toxic and low-cost. Constructing heterojunctions and introducing oxygen vacancies (OVs) are two effective measures to achieve these targets. RESULTS It is found that the 1.0% Pd/PdO/β-Bi 2 O 3 exhibits the best photocatalytic activity with an efficiency of 97.4% for Bisphenol A (BPA) degradation and 47.6% for nitric oxide (NO) removal within 30 min. The 1.0% Pd/PdO/β-Bi 2 O 3 composite shows 23.3% efficiency in the photodegradation of BPA under 595 nm monochromatic light irradiation, while β-Bi 2 O 3 tends to be invalid. Moreover, the OVs promote the removal of NO without irradiation. CONCLUSION In this work, a novel ternary Pd/PdO/β-Bi 2 O 3 material as high-performance photocatalyst for the BPA degradation and NO removal was synthesized. The presence of OVs promotes the activation of the oxygen molecule, thereby facilitating the photocatalytic process. The p - n junction of PdO/β-Bi 2 O 3 and the Schottky barrier of Pd/β-Bi 2 O 3 significantly limit the recombination of photoinduced electron–hole pairs in the composite. Furthermore, an artifact in the electron spin resonance (ESR) spectrum obtained by spin trapping with 5,5-dimethyl-1-pyrroline N -oxide (DMPO) as adducts confirms that both hydroxyl radical (•OH) and superoxide radical (•O 2 − ) species are involved in the photocatalytic process. The present work offers a new perspective for developing the composite photocatalysts with high efficiency through loading of metal nanoparticles and creating an heterojunction. © 2019 Society of Chemical Industry
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MOLECULES
·
2023
·Vol. 28
·期 7
·3068
·
IF 4.6
Yuanyuan Ma,Wanting Liu,Zhifang Li,Yuhang Sun,Mingyuan Shi,Zheng Nan,Ruotong Song,Liying Wang,Jingqi Guan
TS-1 zeolite with desirable pore structure, an abundance of acidic sites, and good thermal stability promising as a support for the selective catalytic reduction of NO with NH3(NH3-SCR). Herein, a series of Mn–Fe/TS-1 catalysts have been synthesized, adopting tetraethylenepentamine (TEPA) as a metal complexing agent using the one-pot hydrothermal method. The introduced TEPA can not only increase the loading of active components but also prompts the formation of a hierarchical structure through decreasing the size of TS-1 nanocrystals to produce intercrystalline mesopores during the hydrothermal crystallization process. The optimized Mn–Fe/TS-1(R-2) catalyst shows remarkable NH3-SCR performance. Moreover, it exhibits excellent resistance to H2O and SO2at low temperatures. The characterization results indicate that Mn–Fe/TS-1(R-2) possesses abundant surface Mn4+and Fe2+and chemisorbed oxygen, strong reducibility, and a high Brønsted acid amount. For comparison, Mn–Fe/TiO2displays a narrower active temperature window due to its poor thermostability.Keywords:Mn-Fe/TS-1;one-pot synthesis;NH3-SCR;metal complexing;resistance to H2O and SO2
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JOURNAL OF RARE EARTHS
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2022
·
IF 4.632
Yandi Cai,Peng Yang,Qinglong Liu,Kaili Ma,Wenxin Ma,Wang Song,Qiuhui Qian,Fei Gao,Wei Tan,Lin Dong
Sulfation treatment has been widely used to promote the catalytic performance of ceria (CeO 2 ) based catalysts for the selective catalytic reduction of NO by NH 3 (NH 3 -SCR of NO). Praseodymium oxide (PrO x ), another commonly used rare earth material with similar structural properties as CeO 2 , also shows satisfactory redox properties due to the facile redox cycle of Pr 3+ ↔ Pr 4+ . In this work, gas phase sulfation treatment with varied duration was performed on PrO x at 200 °C, and the NH 3 -SCR activity of sulfated PrO x was evaluated. Based on the results of systematic characterizations (e.g., N 2 -physisorption, NH 3 oxidation , NO oxidation, in situ diffuse Fourier transform infrared spectroscopy), it is revealed that the catalytic performance of sulfated PrO x is highly dependent on the sulfation time (or the amount of sulfate species deposited on PrO x ), which has a significant impact on the competitive reaction between NH 3 oxidation and NH 3 -SCR of NO, thus determining the NH 3 -SCR activity of PrO x . This work provides new insight into tuning the interaction between PrO x surface and reactants (NO, NH 3 ) via sulfation treatment, which cam guide the design and application of PrO x based catalysts for NH 3 -SCR of NO in the future.
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Small
·
2024
·
IF 13
Jinyan Lin,Yueyang He,Yang Li,Jianwu Chen,Xiaolong Liu
The efficacy of traditional radiotherapy (RT) has been severely limited by its significant side effects, as well as tumor hypoxia. Here, the nanoscale cerium (Ce)-based metaloxo clusters (Ce(IV) 6 )-porphyrin (meso-tetra (4-carboxyphenyl) porphyrin, TCPP) framework loaded with L-arginine (LA) (denoted as LA@Ce(IV) 6 -TCPP) is developed to serve as a multifarious radio enhancer to heighten X-ray absorption and energy transfer accompanied by O 2 /NO generation for hypoxia-improved RT-radiodynamic therapy (RDT) and gas therapy. Within tumor cells, LA@Ce(IV) 6 -TCPP will first react with endogenous H 2 O 2 and inducible NO synthase (iNOS) to produce O 2 and NO to respectively increase the oxygen supply and reduce oxygen consumption, thus alleviating tumor hypoxia. Then upon X-ray irradiation, LA@Ce(IV) 6 -TCPP can significantly enhance hydroxyl radical (•OH) generation from Ce(IV) 6 metaloxo clusters for RT and synchronously facilitate singlet oxygen ( 1 O 2 ) generation from adjacently-coordinated TCPP for RDT. Moreover, both the •OH and 1 O 2 can further react with NO to generate more toxic peroxynitrite anions (ONOO − ) to inhibit tumor growth for gas therapy. Benefitting from the alleviation of tumor hypoxia and intensified RT-RDT synergized with gas therapy, LA@Ce(IV) 6 -TCPP elicited superior anticancer outcomes. This work provides an effective RT strategy by using low doses of X-rays to intensify tumor suppression yet reduce systemic toxicity.
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JOURNAL OF ALLOYS AND COMPOUNDS
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2025
·
IF 6.3
Lingtong Li,Ting Shen,Juan Liang,Jiaxiu Guo
A novel self-assembled Mn 3 O 4 @Bi 5 O 7 I/BiOI (Mn 3 O 4 -BBOI) bi-heterojunction photocatalyst was synthesized via a facile one-step hydrothermal method and systematically characterized to investigate its optoelectronic properties. The photocatalytic performance was evaluated through the degradation of NO in a continuous-flow microreactor. Results indicate the successful construction of two distinct interfacial structures within the Mn 3 O 4 -BBOI system: an interface between Mn 3 O 4 and the Bi 5 O 7 I/BiOI heterostructure, and an internal interface between Bi 5 O 7 I and BiOI. These interfaces exhibit lattice distortions and vacancies, which are critical for promoting charge separation. Specifically, Mn 3 O 4 acts as an electron acceptor, facilitating the transfer of electrons from I⁻ in the bismuth-based substrate to Mn 3 + in Mn 3 O 4 , thereby optimizing the generation and recombination dynamics of charge carriers. The Mn 3 O 4 -BBOI photocatalyst demonstrates stable performance, achieving 56–60 % NO removal efficiency under light irradiation, along with excellent suppression of toxic NO₂ byproducts. Introduction of a small amount of water vapor (5 vol%) increase the NO removal efficiency to the instantaneous maximum value of 65 %, although the inhibitory effect on NO₂ is slightly attenuated. Mechanistic studies reveal that superoxide radicals (•O 2 ⁻) serve as the primary active species responsible for the oxidation of NO to nitrite/nitrate (NO 2 ⁻/NO 3 ⁻), while hydroxyl radicals (•OH), generated via the reaction between •O 2 ⁻ and adsorbed H 2 O, contribute secondarily to the oxidation process.
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ACS Catalysis
·
2026
·Vol. 16
·期 15
·14804-14817
·
IF 13.6
Liu Hongjing,Ren Shan,Li Xiaodi,Liu Manyi,Chen Peng,He Chi,Bai Bofeng,Chai Shouning,Dong Fan
Efficient photocatalytic mitigation of nitrogen oxides (NO x ) under ambient conditions remains challenging due to limited charge-carrier separation and poor selectivity in regulating reactive oxygen species (ROS), which often results in undesirable NO 2 accumulation. In this study, bismuth molybdate (Bi 2 MoO 6 ) was employed as a model photocatalyst, on which dual active sites composed of plasmonic metallic Bi nanoparticles and ultrasmall spin-polarized NiO were in situ constructed. Plasmonic Bi enhances visible-light absorption and hot-electron generation via localized surface plasmon resonance, while NiO establishes a spin-selective electron-transfer pathway that facilitates efficient O 2 activation. This cooperative interface suppresses exciton recombination and promotes a superoxide (·O 2 – )-dominated oxidation pathway. Consequently, the optimized Bi-NiO@BMO achieves 77.0% NO removal, 76.7% nitrate selectivity, and minimal NO 2 accumulation (<11 ppb), representing a 9.7-fold enhancement compared with pristine Bi 2 MoO 6 . In practical applications, the PTFE-assisted loading technique allows the material to be fixed onto ceramic foam, achieving an 84% NO removal efficiency and further enhancing photocatalytic performance. Spectroscopic analyses combined with density functional theory (DFT) calculations confirm that the plasmon–spin interaction lowers the free-energy barriers for ·O 2 – formation and deep NO oxidation. This work provides a mechanistic insight into plasmon-spin-regulated ROS generation and offers a rational design strategy of highly selective photocatalysts for environmental NO x abatement.
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Materials Today Advances
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2026
·
IF 8
Jiabao Xiong,Yuan Wang,Lijun Zhu,Zhong Du,Le Guo,Jiayi Ding,Chi Zhang,Siyiti Amuti,Junhua Hu,Chao Wang,Biao Dong,Nuernisha Alifu
Overcoming thermoresistance and achieving precise, efficient tumor therapy remain major challenges. Heat shock protein 70 (HSP70) expression and autophagy activation are two major cellular defense mechanisms associated with thermal resistance. However, strategies that target both mechanisms to improve tumor treatment efficacy remain limited. Herein, this study presents a novel type of near-infrared II (NIR-II)-responsive theranostic nanoplatform (IR-820@γ-PGA/Arg NPs, PIRA NPs) that integrates photothermal therapy (PTT), photodynamic therapy (PDT), nitric oxide (NO)-mediated gas therapy (GT), and dual-pathway inhibition mechanisms to overcome thermal resistance. The theranostic nanoplatform utilizes a γ-polyglutamic acid (γ-PGA) to encapsulate the NIR-II dye IR-820, which forms stable J-aggregates to improve NIR-II fluorescence emission and photothermal conversion efficiency. The nanoplatform adsorbs L-arginine (Arg) and releases NO under 808 nm laser excitation, exhibiting excellent photothermal properties and NIR-II fluorescence emission for precise tumor treatment. PIRA NPs overcome photothermal resistance via two pathways: suppressing HSP70-mediated thermoresistance and disrupting the autophagy-lysosomal degradation pathway (LC3B/p62 axis) through Arg-derived NO generation. This dual-pathway blockade effectively neutralizes tumor defenses, achieving a 92.7% tumor inhibition rate with minimal systemic toxicity. The γ-PGA framework enhances the stability of J-aggregates and their biocompatibility, further improving therapeutic efficacy. This work provides a versatile nanotherapeutic platform based on a promising strategy for reversing thermoresistance and achieving highly efficient cancer therapy.
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ARCHAEOMETRY
·
2026
·
IF 1.4
Yutong Chen,Zichen Zhao,Hui Zhang,Yihua Sun,Zongmin Li,Jianxi Li,Xing Zhao
Tomb No. 2 at Tushan, the most completely preserved Eastern Han princely tomb discovered nowadays, contains the feudatory king's lacquered coffin, which was examined using multianalytical techniques. Although the wooden core has severely deteriorated, analysis revealed a complex preserved structure comprising a cinnabar pigment layer above two distinct lacquer ash layers (tile-like ash containing SiO 2 and bone-derived ash with Ca 10 (PO 4 ) 6 (OH) 2 , SiO 2 , and Ca 3 (PO 4 ) 2 ), where the lacquer mixture combined urushiol with tallow tree oil and incorporated calcined bos taurus bone material. These findings provide material science data essential for the conservation, identification, and restoration of similar lacquered artifacts from China's Eastern Han Dynasty.
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高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
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2026
·
IF 8.3
Jinjun Hu,Wei Meng,Shuang Qi,Ling Wang,Weiwei Meng,Yuehua Li,Lei Dai
Conventional sensing of nitrogen oxide (NO) is based on charge transfer reactions that occur exclusively at the triple-phase boundaries (solid electrolyte/sensing electrode/NO, TPBs). Here, an interface-engineered strategy is proposed to overcome this limitation by constructing a bidirectional mixed ionic-electronic conducting (MIEC) architecture. By modifying a porous YSZ scaffold with NiO to introduce an electron-conducting phase, a mixed conductive heterogeneous porous framework, NiO-YSZ, was formed. Subsequently, La 0.8 Sr 0.2 Co 0.2 Fe 0.8 O 3-δ (LSCF) active sensing phase was incorporated into this framework via an impregnation method, ultimately resulting in a 3D composite sensing electrode (LSCF-NiO-YSZ) that possesses both ionic and electronic conductivity. This design expands the active site region beyond TPBs and enables more efficient charge transfer. The influence of YSZ/NiO mass ratios was systematically examined, and sensors based on NiO-modified YSZ exhibited markedly higher response values and improved sensitivity compared to pristine YSZ. The optimal composition (YSZ/NiO = 5:5) delivered a sensitivity of 10.29 °·decade −1 with excellent reproducibility and selectivity at 500°C and 0.1 Hz. These results highlight interface conduction engineering as an effective route for achieving high-performance impedancemetric NO sensors.
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CHEMICAL ENGINEERING JOURNAL
·
2026
·
IF 12.5
Chenda Wei,Shixin Huang,Wei Liu,Hailong Lin,Zhicheng Wen,Chunjin Hang,Rong An
Template-guided topotactic transformation builds an ordered 2D/1D Bi 2 O 2 S/Bi 2 S 3 . • Bi 2 O 2 S/Bi 2 S 3 exhibited excellent sensitivity and a fast response to NO under high humidity. • The sensing mechanism was systematically studied at atomic and electronic scales. • Exhaled NO monitoring potential was demonstrated under breath-relevant conditions. Exhaled nitric oxide (NO) is a clinically relevant noninvasive breath biomarker associated with asthma diagnosis and management, yet its reliable detection remains hindered by the high humidity of human breath. Here, we develop a humidity-enhanced sensing strategy through template-guided topotactic transformation. The resulting hierarchically ordered 2D/1D Bi 2 O 2 S/Bi 2 S 3 (BOS/BS) heterostructure features an open nanoarchitecture, facilitating rapid gas transport and exposing active sites. The optimized BOS/BS sensor delivers a response of 37 to 1 ppm NO at room temperature under 90% RH, with response/recovery times of 9/33 s and a detection limit of 25 ppb. The response is nearly 12 times that of the single-phase BS sensor and 4 times that of the less ordered BOS/BS sensor Rather than excluding moisture, the BOS/BS heterostructure integrates interfacial charge redistribution with humidity-induced surface hydroxylation to promote NO adsorption and conversion. This work establishes a topotactic route to hierarchically ordered heterostructures for room-temperature NO sensing under high humidity and offers a materials-design strategy for breath-relevant NO sensing under moisture-rich conditions. Download: Download high-res image (165KB) Download: Download full-size image
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ENVIRONMENTAL SCIENCE & TECHNOLOGY
·
2026
·
IF 12.2
Ya Zhao,Chong Wang,Yingqi Zhao,Yufeng Shao,Hua Xie,Jiayue Yang,Weiqing Zhang,Guorong Wu,Gang Li,Ling Jiang,Xueming Yang
Elucidating the impacts of gaseous pollutants on secondary organic aerosol (SOA) formation mechanisms is critical for developing effective PM2.5 mitigation strategies. However, the combined effects of NOx (NOx = NO2 + NO) and SO2 on SOA compositions under complex photochemical conditions remain mechanistically unresolved. Here, we investigated the individual roles of NO2/NO and their combined effects with SO2 on β-myrcene photooxidation. Our results showed that NO2 enhanced the SOA yield and the O:C ratio through oxidant amplification, whereas NO suppressed nucleation and oxidation states of products but facilitated particle size growth via organic nitrate partitioning. SO2 exhibited significant synergistic effects with both NO2 and NO, facilitating particle formation and growth processes. The newly built vacuum ultraviolet free electron laser photoionization aerosol mass spectrometer enabled the observation of a series of new compounds (i.e., organic peroxides, organic nitrate, and organosulfates) and identified new mechanisms of SOA formation. Notably, a novel compound with a molecular weight of 287 was characterized to be a nitrogen- and sulfur-containing species. These findings highlight the critical roles of pollutants in particle formation in environmental processes and provide key scientific support for regional air quality management and climate change mitigation.
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高影响因子
ChemCatChem
·
2020
·Vol. 13
·期 1
·438-444
·
IF 4.853
Xianwei Wang,Nobutaka Maeda,Daniel M. Meier,Alfons Baiker
Graphical Potassium titanate (K 2 Ti 8 O 17 ) nanobelts (KTN) are a unique support for Au and bimetallic AuRh nanoparticles showing strong enhancement of the catalytic reduction of NO with CO to N 2 .The KTN support facilitates the formation of surface nitrate, carbonate and isocyanide species, resulting in superior catalytic activity compared to corresponding TiO 2 -supported catalysts. The catalytic reduction of NO with CO was examined over monometallic Au and bimetallic AuRh nanoparticles supported on potassium titanate (K 2 Ti 8 O 17 ) nanobelts (KTN) and TiO 2 . The highly crystalline KTN, prepared from TiO 2 by a hydrothermal process using KOH, were several μm long and ca. 8 nm wide. Both Au and bimetallic AuRh catalysts showed a striking enhancement of the catalytic performance with KTN as support, compared to corresponding TiO 2 -supported catalysts. The reasons for this behavior could be traced back using in situ diffuse reflectance infrared Fourier transform spectroscopy in tandem with modulation excitation spectroscopy, which proved that the KTN support promotes the formation of surface nitrate (−NO 3 − ), carbonate (−CO 3 2− ), and isocyanide (−NCO) species. In particular, the combination of KTN with bimetallic AuRh nanoparticles results in the facile formation of isocyanide, which is a pivotal intermediate for producing dinitrogen molecules via the reaction with NO; NCO (a) +NO (a) →N 2 +CO 2 .
研究领域:
催化化学
·
材料科学
·
环境科学
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