JOURNAL OF ALLOYS AND COMPOUNDS
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2025
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IF 6.3
Jinghua Li,Pengshan Guo,En Li,Chuntao Zhao,Xinyue Yan,Pan Xu
Incorporation of the traditional Fenton catalysis technique with other advanced wastewater purification technology is a effective strategy for large-scale water pollution treatment, this potency of co-processing treatment technology on the degradation of organic pollutant effluents is more efficient and preferable. In this study, a innovation based on photothermal enhanced photo-electro Fenton tactics based on alloyed snowflake-sharped Pt modified Cu 2 O nanoclusters (SSPt-Cu 2 O NCs) were prepared by using a typical hydrothermal method. The alloying design is conducive to electron transfer to improve catalytic efficiency. Meanwhile, the SSPt-Cu 2 O NCs have excellent photothermal properties (over 50 °C) to increase the catalytic reaction rate under 808 nm near-infrared (NIR) laser irradiation. Then dyestuff Rhodamine B (RhB) was used as model contaminants to evaluate the degradation capacity of the as-synthesized SSPt-Cu 2 O NCs by simultaneously append NIR laser (808 nm, 2.0 W•cm −2 , 5 min) and direct current (DC, 110 V, 50 Hz, Cv≤1 mvrms CC≤5 mARms). The degradation efficiency for reach up to could reach up to 96.13 % in a 2-h treatment procedure by using the photo-electro Fenton catalyst (1.0 mg/mL of RhB, catalyst concentration at 1.0 mg•mL −1 , and pH at 7.0). Moreover, the SSPt-Cu 2 O NCs photo-electro Fenton catalyzers show goodish reusability and outstanding atoxic nontoxicity for environment application, which designating the potential candidate for organic pollutional chemicals in wastewater management.
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APPLIED SURFACE SCIENCE
·
2025
·
IF 6.9
Mao Feng,Yanli Sun,Lingxuan Wang,Yalun Wu,Shuangshuang Wang,Liangyu Li,Shiwen Wang,Yanxia Wang,Zumin Wang,Yasong Zhao,Feifei You,Danyang Li
Constructing advanced photocatalysts for tetracycline (TC) degradation in aquatic environments is a promising and green strategy to mitigate antibiotic resistance and ecological risks. In this work, the hollow structured ZnO microspheres functionalized with Pt nanoparticles were rationally designed and synthesized through a sacrificial template approach and photodeposition process. The hollow structures strengthened light trapping via multi-scattering in cavity as well as shortened charge migration pathway due to the thinner shell, which facilitated more electron (e − ) and hole (h + ) migration to catalyst surface. Furthermore, the Pt nanoparticles anchored on ZnO surfaces induced localized surface plasmon resonance (LSPR) effect, broadening light absorption in visible light range. Concurrently, the formation of heterojunction between Pt and ZnO significantly suppressed the recombination of e − /h + . Thus, the optimal Pt/ZnO catalyst achieved 90.29 % TC degradation within 100 min, exhibiting a reaction rate constant of 0.02347 min −1 , which was 2.62-fold higher than that of single ZnO. Moreover, the degradation efficiency retained 87.84 % after five successive recycles, demonstrating exceptional durability and stability. This work offers a facile and scalable strategy for fabricating high performance photocatalysts for organic compounds degradation in pollution water with a bright application prospect.
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ACS Catalysis
·
2025
·
IF 13.1
Yang Zou,Xue Li,Yongqi Zhao,Xiaolong Liu,Shaohua Xie,Fudong Liu,Tingyu Zhu
Defect engineering has attracted great attention due to its important role in promoting metal dispersion and regulating catalytic performance. In this study, a gentle method for stabilizing metal single atoms and adjusting the metal coordination environment was proposed, wherein the chemical etching of a Ti–Si oxide composite by NaOH was employed to construct a defect structure. As a conceptual proof, a defective catalyst loaded with 0.1 wt % Pt was synthesized, which exhibited a complete CO oxidation temperature of 200 °C, a significant 70 °C decrease compared to the conventional catalyst. Characterization and theoretical calculations confirmed that Pt existed as single atoms on the defective catalyst, and O2 was adsorbed and activated at Ti3+ defect sites. Notably, the CO oxidation followed the Mars-van Krevelen (MvK) mechanism, resulting in a remarkably low oxygen activation energy barrier of 0.38 eV on the defective catalyst, significantly lower than that on the conventional catalyst (2.48 eV), consistent with its enhanced low-temperature activity. This work provides a promising strategy for the design of efficient and stable low-load noble metal catalysts on oxide-based supports.
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Russian Journal of Physical Chemistry A
·
2022
·Vol. 96
·期 9
·1935-1943
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IF 0.791
Zhang Hui,He Jin,Lei Bowen,Wen Jie,Jing Fangli,Ali Arshid Mahmood
Abstract The bimetallic Pt–Ni nano-catalysts with different platinum to nickel mass ratios supported on the carbon nanotubes (PtNi( x : y )/FCNTs-D) were successfully synthesized by the polyol method and applied to the H 2 generation from ammonia borane (AB) hydrolysis. Several state-of-the-art characterization methods were performed to explore the correlation between catalytic performance and the physicochemical characterizations of the catalysts. The results show that the optimum Pt : Ni ratio is critical to enhance the H 2 generation from AB hydrolysis and in this study, it is 1 : 2. The presence of carbon nanotubes enhanced the dispersion and stability of the Pt–Ni nanoparticles. The availability of more active sites and lowered binding energy of Pt 0 in PtNi(1 : 2)/FCNTs-D catalyst, lead to the increased catalytic activity of H 2 generation from AB hydrolysis.
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Molecular Catalysis
·
2024
·
IF 3.9
Feng Feng,Yaoyao Zhen,Yixin Chen,Jie Luo,Chong Yao,Limei Pan,Ruihao Chen,Jiwei Wu,Chunshan Lu,Xiaoliang Xu,Qingtao Wang,Qunfeng Zhang,Xiaonian Li
Liquid-phase hydrogenation reaction of nitrobenzene to p-aminophenol (PAP) is investigated using a series of Pt-based catalysts, where activated carbon served as support and ethylene glycol (EG) as the reducing agent and solvent. Different platinum sources are employed to obtain Pt/C catalysts with different Pt metal particle sizes, as determined by transmission electron microscopy. The underlying mechanism of nitrobenzene selective hydrogenation on different size of Pt clusters have been systematically investigated. Characterization and catalytic tests show that the catalytic performance of the Pt-based catalyst is deeply influenced by particle size, where the size around 2.5 nm exhibits a suitable hydrogen absorption and activation ability, leading to the best catalytic performance. Under the optimal reaction conditions, the PAP selectivity reached 76.4 % and the conversion of NB reached 100 %. Moreover, the catalyst displayed strong recyclability with the PAP selectivity remaining above 70 % after five cycles of the catalyst, which would enable promising industrial applications.
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International Journal of Electrochemical Science
·
2023
·
IF 1.5
Ling Shi,Zefeng Wang,Xianlan Chen,Guangming Yang,Wei Liu
The synthesis of noble metal nanoparticle with controlled shapes is an attractive goal in developing highly active catalysts. However, constructing high-quality noble metallic nanocatalysts with good electrocatalytic activity remains a huge challenge to date. In this research work, the high-quality polyaniline functionalized graphene nanosheets (PANI/GNS) were prepared by an interfacial polymerization method. The abundant -NH2 groups onto the surface of resulted PANI/GNS nanocomposites, and can be used as active site for growing high load rate of Pd nanoparticles (NPs). Subsequently, Pt NPs were successfully deposited on the Pd surface formed Pt-Pd/PANI/graphene nanosheets (Pt-Pd/PANI/GNS) composites. Interestingly, the shape of Pt-Pd bimetallic can be effectively controlled by simply changing the reaction parameters. The shape and structure of nanocatalysts were characterized by X-ray diffraction (XRD) and transmission electron microscopy (TEM). The electrocatalytic properties of nanocomposites were characterized by cyclic voltammetry (CV). The TEM images show that the Pt-Pd nanoflowers were successfully decorated onto the surface of PANI/GNS nanocomposites. The electrocatalytic properties for dioxygen and methanol of prepared Pt-Pd/PANI/GNS nanocatalyst were investigated. The electrochemical results show that the nanocatalysts exhibit higher electrocatalytic activity for methanol oxidation and dioxygen reduction.
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CERAMICS INTERNATIONAL
·
2024
·
IF 5.1
Zhenze Xie,Yucheng Huang,Jingguang Wang,Wenxin Guo,Yutao Lin,Yingxin Lin,Chang Du
Breast cancer is one of the most widespread cancers worldwide in the female population. However, the side effects and toxicity of chemotherapy and radiotherapy are the obstacles to the treatment of breast cancer. Therefore, we developed a Pt loaded CoFe 2 O 4 -based nanoparticles (CF@Pt) for breast cancer treatment with chemodynamic therapy (CDT) and sonodynamic therapy (SDT). The Co 2+ /Co 3+ and Fe 2+ /Fe 3+ gave CF@Pt peroxidase-like activity and catalase activity to gain ·OH and O 2 in the tumor microenvironment (TME) for CDT. Furthermore, the separation of electron-hole pairs of CF@Pt transferred the O 2 into 1 O 2 in the presence of ultrasound (US) for SDT. The high level of O 2 generated by CDT would produce more 1 O 2 by SDT that promoted the CDT efficiency. Moreover, the addition of Pt limited the recombination of electron-hole pairs and reduced the energy gap to enhance SDT/CDT combination therapy. In addition, CF@Pt could be engulfed by MDA-MB-231 cells and induced the apoptosis while it had good biocompatibility and blood compatibility. This design provided a novel application on the treatment of breast cancer.
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ANALYTICA CHIMICA ACTA
·
2024
·
IF 5.7
Meiling Chen,Yang Yang,Qinhua Chen,Lina Tang,Junlin Liu,Yujie Sun,Qiming Liu,Yulin Zhang,Guo-jun Zhang,Shaowei Chen
Cholesterol is an important lipid compound found in a variety of foods, and its level in human blood is closely related to human health. Therefore, development of rapid and accurate POCT (point-of-care testing) methods for cholesterol detection is crucial for assessing food quality and early diagnosis of diseases, in particular, in a resource-limited environment. In this study, a smartphone-assisted colorimetric biosensor is constructed based on platinum,phosphorus-codoped carbon nitride (PtCNP 2 ) for the rapid detection of cholesterol. Phosphorus-doped carbon nitride is prepared by thermal annealing of urea and NH 4 PF 6 , into which platinum is atomically dispersed by thermal refluxing. The obtained PtCNP 2 exhibits an excellent peroxidase-like activity under physiological pH, whereby colorless o -phenylenediamine (OPD) is oxidized to colored 2,3-diaminophenazine (DAP) in the presence of hydrogen peroxide (H 2 O 2 ), which can be produced during the oxidation of cholesterol by cholesterol oxidase. A smartphone-assisted visual sensing system is then constructed based on the color recognition software, and rapid on-site detection of cholesterol is achieved by reading the RGB values. Meanwhile, the generated DAP shows an apparent fluorescence signal and can realize highly sensitive detection of cholesterol by the change of the fluorescence signal intensity. Such a cholesterol sensor exhibits a wide linear detection range of 0.5–600 μg mL −1 and a low detection limit of 59 ng mL −1 . The practicality of the sensor is successfully demonstrated in the rapid detection of cholesterol in serum and food.
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PubMed
高影响因子
MOLECULES
·
2025
·Vol. 30
·期 1
·187
·
IF 4.6
Shuqi Liao,Weisen Deng,Feng Yang,Jutao Zhou,Ling Wu,Donghong Yu,Zhong Cao
Compared to natural enzymes, the development of efficient artificial simulated enzymes, such as those based on bimetallic materials with high catalytic activity and good stability, is an important way until now. Herein, we employed ZnCo2O4microspheres as carriers to synthesize Pt-doped composites with different amounts using a one-pot method. The morphology and structure of the synthesized materials were characterized using XRD, SEM, BET, FT-IR, XPS, and Zeta potential techniques. It was found that Pt0adhered well to the surface of ZnCo2O4microspheres, with a 12.5% Pt doped ratio exhibiting abundant oxygen vacancies, excellent substrate affinity, and high peroxidase-like activity. Using fluorescent probes and electrochemical methods, the peroxidase-like catalytic mechanism has been explored that Pt@ZnCo2O4microspheres can accelerate the electron transfer between H2O2and 3,3′,5,5′-tetramethylbenzidine (TMB). Based on the optimal loading ratio of 12.5% of Pt@ZnCo2O4, a colorimetric sensor for visual detection of L-cysteine (L-Cys) was constructed, exhibiting a wide linear range of 0.1~50 µM and a low detection limit of 0.0163 µM. The sensor possesses good selectivity, reusability, and usage stability, which can be well applied to the determination of L-Cys in health product capsules with recovery rates of 96.9%~103.7% and RSD of 1.07%~6.50%. This work broadens the application prospects of spinel materials such as ZnCo2O4in the field of biological analysis and also provides inspiration for the development of new artificial simulated enzymes.
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高影响因子
ACS Catalysis
·
2025
·
IF 13.1
Yuanjing Zhang,Guanyi Zhang,Quandong Hou,Shiquan Zhao,Si Wang,Enze Xu,Lei Wang,Xin Zhang,Feng Li,Yusen Yang,Min Wei
Aqueous-phase tandem reactions, as a fundamental aspect of green chemistry, hold a crucial position in the contemporary synthesis of fine chemicals, wherein the advancement of high-performance heterogeneous catalysts remains a formidable challenge. Herein, we report a Pt1Con single-atom alloy (SAA) catalyst in which Pt single atoms are immobilized onto the surface of Co nanoparticles through Pt–Co coordination. The Pt1Con SAA catalyst exhibits a high chemoselectivity for the aqueous-phase hydrogenation–rearrangement reaction of furfural (FAL) to cyclopentanol (CPL) (yield: >93%, considering the carbon loss), with a TOF value of 2257 h–1 (based on Pt). A joint investigation based on reaction dynamics, isotope-label tracing experiments, EPR, and in situ FT-IR verifies a five-step consecutive tandem reaction pathway for the formation of CPL. Notably, during the reaction, the rapid exchange of hydrogen atoms would occur between activated hydrogen species and the water solvent. Furthermore, the water molecule does not serve as a H-donor but is involved in the rearrangement reaction in the side chain of the furan ring. Kinetic studies combined with DFT calculations substantiate that the Pt–Co interface sites effectively lower the energy barrier of the cyclopentanone (CPO) hydrogenation step via facilitating activation adsorption of the carbonyl group, accounting for the largely enhanced catalytic behavior. This study sheds light on the advancement of a highly efficient and stable heterogeneous catalyst for a biomass upgrading reaction in the aqueous phase.
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APPLIED CATALYSIS B-ENVIRONMENTAL
·
2024
·
IF 20.2
Fang Dong,Yu Meng,Weitong Ling,Weigao Han,Weiliang Han,Xiaona Li,Zhicheng Tang
Development of low-cost noble Pt-based catalyst with superior catalytic performance is a challenge to achieve its application in VOCs catalytic oxidation. Although the single atom provides a strategy to design and develop highly efficient heterogeneous catalysts that simultaneously maximizes the utilization of precious metal atoms, the stability of single atom catalysts is not satisfactory as a result of its high atomic surface energy. Here we construct a Pt 1 @CeO 2 single atom catalyst (SAC) with excellent catalytic activity for benzene catalytic combustion (T 90 = 212 °C) and low precious metal Pt loading, and even displaying an outstanding thermal stability and water resistance under the harsh conditions of 30,000 mL/g/h and 2000 ppm benzene. This Pt 1 @CeO 2 catalyst was obtained by in situ domain limited encapsulation of Pt species in Ce-MOFs nanocages during the solvothermal reaction process. It is observed that lots of oxygen vacancies were created by the dislocation and phase transition of CeO 2 to provide abundant sites for anchoring single atomic Pt, which can be localized and anchored firmly to oxygen vacancies, thus forming the highly stable Pt single atom. The atomically dispersed Pt is capable of improving the catalytic activity by forming Pt-O band. The good water resistance may be ascribed to the confined Pt single atom into oxygen vacancies of CeO 2 support to form strong metal-support interaction (SMSI), and the PtO x nanoparticles would be easy to aggregate deactivation under water vapor conditions. It is a simple and universal strategy to prepare Pt SAC via the inherently confined space of MOFs nanocages formed by coordination of organic ligands and metal ions, which benefits from the functional modification of ethylene glycol in MOFs self-assembly reaction.
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高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
·
2024
·
IF 20.2
Feng Long,Bo Zhang,Xincheng Cao,Xiaolei Zhang,Hanjie Ying,Junming Xu,Chenjie Zhu
Herein, we have achieved successful preparation of atomically dispersed catalytic systems, liquid metal Pt x /Ga catalysts, which eliminate the need for reduction processes. Notably, the 0.5 wt% Pt x /Ga catalyst exhibited exceptional stability in hydrogenation performance, achieving 100 % conversion of stearic acid with an impressive 98.7 % selectivity towards octadecane, especially with unprecedented stability over 19 recycling cycles. X-ray absorption spectra (XPS) and density functional theory (DFT) calculations unequivocally establish that isolated Pt atoms, benefitting from charge transfer from the Ga matrix, synergistically optimize Pt metal atom utilization, thereby efficaciously optimizing the d-band center and augmenting hydrogenation proficiency. Furthermore, isolated Pt configuration's weaker CO adsorption ability effectively mitigates concerns of catalyst poisoning and undesirable agglomeration, thereby engendering superior stability. The stronger adsorption with aldehyde and alcohol intermediates promotes the hydrogenation of stearic acid through hydrodehydration pathway, thereby ensuring a high carbon utilization economy. Overall, our work offers insight into the investigation of hydrogenation conversion of bio-derivatives over atomically dispersed catalytic systems.
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