Catalysis Letters最新文献_第2页

Biochemical Characterization and Wash Performance Analysis of a Protease Purified from the Seeds of Cyamopsis tetragonoloba

IF 2.3 4区化学

Catalysis Letters Pub Date : 2025-01-03 DOI: 10.1007/s10562-024-04920-7

Rajesh Kumar Rawaliya, Monika Pandey, Krishnan Hajela

{"title":"Biochemical Characterization and Wash Performance Analysis of a Protease Purified from the Seeds of Cyamopsis tetragonoloba","authors":"Rajesh Kumar Rawaliya, Monika Pandey, Krishnan Hajela","doi":"10.1007/s10562-024-04920-7","DOIUrl":"10.1007/s10562-024-04920-7","url":null,"abstract":"<div><p>Proteases are essential enzymes with broad importance in biological, commercial, and therapeutic applications. A protease was isolated and purified from the seeds of <i>Cyamopsis tetragonoloba.</i> In the current study, the enzyme was further explored and characterized. The protease was found to exhibit significant cleavage towards synthetic substrates like N- succinyl phenyl alanine p-nitroanilide (82%) and N-succinyl Ala-Ala-Ala p-nitroanilide (93.2%) when compared to N-αBenzoyl-DL-arginine ϸ-nitroanilide. The protease also cleaved natural substrates and the cleavage pattern of BSA and casein indicated that the purified protease was an endopeptidase. The kinetic parameters Km and Vmax were determined as 97.2 mM and 0.71 mM/min respectively using N-αBenzoyl-DL-arginine ϸ-nitroanilide as a substrate. Activation energy, Enthalpy and temperature coefficient of the protease were determined to be 1.91 kcal/mol, 1.25 kcal/mol and 1.093 respectively. The protease activity was stable at up to 0.4 M NaCl. Furthermore, the protease activity increased in the presence of MgCl<sub>2</sub> (110%) and was suppressed in the presence of CuCl<sub>2</sub> (20%). The enzyme was also stable even in the presence of reducing agent 2-Mercaptoethanol (5mM). The proteolytic activity in non-germinated and germinated seeds of <i>Cyamopsis tetragonoloba</i> was estimated and found to be 1.1 mM/min and 1.8 mM/min respectively. The purified protease was resistant to fast auto-digestion as proteolytic activity remained nearly stable up to 80% at 30 °C as storage time increased from the 1st day to the 14th day after purification. The protease was investigated for its application as a cleansing additive and was efficient in blood stain removal.</p><h3>Graphical Abstract</h3><div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":508,"journal":{"name":"Catalysis Letters","volume":"155 2","pages":""},"PeriodicalIF":2.3,"publicationDate":"2025-01-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142912931","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Research on Ecofriendly Synthesis of Quinolin-4(1H)-Ones Using Fe3O4@SiO2-Diol-Phen-Pd(0) Nanocomposites as a Novel and Reusable Catalyst: Catalysis in Carbonylative Cyclization Reactions

IF 2.3 4区化学

Catalysis Letters Pub Date : 2025-01-03 DOI: 10.1007/s10562-024-04912-7

Ahmed M. Amshawee, Radwan Ali, Maryam A. Hussain, Mosstafa Kazemi

{"title":"Research on Ecofriendly Synthesis of Quinolin-4(1H)-Ones Using Fe3O4@SiO2-Diol-Phen-Pd(0) Nanocomposites as a Novel and Reusable Catalyst: Catalysis in Carbonylative Cyclization Reactions","authors":"Ahmed M. Amshawee, Radwan Ali, Maryam A. Hussain, Mosstafa Kazemi","doi":"10.1007/s10562-024-04912-7","DOIUrl":"10.1007/s10562-024-04912-7","url":null,"abstract":"<div><p>Since quinolin-4(1H)-one derivatives are very important in medicinal chemistry due to their unique structure and diverse biological properties, the development of new methods and catalytic systems for the synthesizing of these compounds is of great importance. In this regard, we presented an attractive, general, applicable, green, and efficient procedure for preparing various derivatives of quinoline-4(1H)-ones, in which palladium nanocomposite [Fe<sub>3</sub>O<sub>4</sub>@SiO<sub>2</sub>-Diol-Phen-Pd(0)] was used as a reusable magnetic catalyst. Three-component reactions of various derivatives of heteroaryl alkynes reacted well with nitrobenzene, and Cr(CO)<sub>6</sub> was well catalyzed by Fe<sub>3</sub>O<sub>4</sub>@SiO<sub>2</sub>-Diol-Phen-Pd(0) nanocomposite using KOAc in water/PEG and the desired quinoline-4 (1H)-one derivative were afforded with very satisfactory results. The water played a very important role in this reaction because it made the nitro functional group easily convert to the amine group, and the reaction was carried out more efficiently. With respect to the previous methods that have been reported, this method is superior to other methods due to the significant features. The synthesis of products can achieve higher yields when reactions are performed in a water/PEG solvent system within a timeframe of under two hours. This catalytic system is versatile and can be applied to a broad spectrum of substrates. Additionally, it allows for easy separation of the catalyst from the reaction mixture, ensuring high reusability of the catalyst for multiple cycles.</p><h3>Graphical Abstract</h3>\u0000<div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":508,"journal":{"name":"Catalysis Letters","volume":"155 2","pages":""},"PeriodicalIF":2.3,"publicationDate":"2025-01-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142912933","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Study on the Effect and Mechanism of Hydrothermal Modification on TiO2 Catalysts for CO2 Photo-Thermal Reduction

IF 2.3 4区化学

Catalysis Letters Pub Date : 2025-01-03 DOI: 10.1007/s10562-024-04906-5

Bin Guan, Junyan Chen, Zhongqi Zhuang, Lei Zhu, Zeren Ma, Xuehan Hu, Chenyu Zhu, Sikai Zhao, Kaiyou Shu, Hongtao Dang, Tiankui Zhu, Zhen Huang

{"title":"Study on the Effect and Mechanism of Hydrothermal Modification on TiO2 Catalysts for CO2 Photo-Thermal Reduction","authors":"Bin Guan, Junyan Chen, Zhongqi Zhuang, Lei Zhu, Zeren Ma, Xuehan Hu, Chenyu Zhu, Sikai Zhao, Kaiyou Shu, Hongtao Dang, Tiankui Zhu, Zhen Huang","doi":"10.1007/s10562-024-04906-5","DOIUrl":"10.1007/s10562-024-04906-5","url":null,"abstract":"<div><p>Photocatalysts like TiO<sub>2</sub> can harness sunlight to reduce CO<sub>2</sub> into valuable hydrocarbon fuels, representing a promising solution for carbon neutrality and sustainable energy challenges. Herein, the effect of hydrothermal modification on the CO<sub>2</sub> photothermal reduction activity of TiO<sub>2</sub> catalyst was studied, through photo-catalytic performance test, XRD, Raman, N<sub>2</sub> adsorption, SEM, TEM, CO<sub>2</sub>-TPD, UV-vis DRS, and PL on commercial and modified TiO<sub>2</sub>. The results show that the hydrothermal-modified TiO<sub>2</sub>-NBS is a pure anatase phase, which has a narrower band gap than the mixed anatase and rutile structure of commercial TiO<sub>2</sub>-P25, and is more favorable to the excitation of photon-generated carriers. Meanwhile, the light emission intensity of anatase phase is weaker, which is conducive to electron-hole separation, promoting the reactant intermediate conversion. In addition, compared with TiO<sub>2</sub>-P25, TiO<sub>2</sub>-NBS has better morphology and specific surface pore characteristics, more adsorption sites for CO<sub>2</sub>, and stronger adsorption strength, which facilitate the adsorption and activation reactions of CO<sub>2</sub>. As a result, TiO<sub>2</sub>-NBS exhibits stronger CO<sub>2</sub> photothermal reduction activity, with CO and CH<sub>4</sub> production rates of 6.49 µmol g<sup>−1</sup> h<sup>−1</sup> and 1.56 µmol g<sup>−1</sup> h<sup>−1</sup>, which are 2.58 times and 2.84 times those of TiO<sub>2</sub>-P25, respectively.</p><h3>Graphical Abstract</h3>\u0000<div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":508,"journal":{"name":"Catalysis Letters","volume":"155 2","pages":""},"PeriodicalIF":2.3,"publicationDate":"2025-01-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142912954","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Unveiling the Synthetic Potential of Conjugated Organic Molecule as Efficient Photo-catalytic Trifluoromethylation and Photo-cocatalytic C–N Coupling Reaction

IF 2.3 4区化学

Catalysis Letters Pub Date : 2025-01-03 DOI: 10.1007/s10562-024-04900-x

Yumin Pan, Tingting Xie, Jiming Peng, Cuihui Cao, Bi-Qun Zou

引用次数: 0

Study on Cerium-Based Catalysts TiCe0.2W0.2O2−δ for Selective Catalytic Reduction of NOx at Low Temperature

IF 2.3 4区化学

Catalysis Letters Pub Date : 2025-01-03 DOI: 10.1007/s10562-024-04914-5

Bin Guan, Junyan Chen, Zhongqi Zhuang, Lei Zhu, Zeren Ma, Xuehan Hu, Chenyu Zhu, Sikai Zhao, Kaiyou Shu, Hongtao Dang, Junjie Gao, Luyang Zhang, Tiankui Zhu, Zhen Huang

{"title":"Study on Cerium-Based Catalysts TiCe0.2W0.2O2−δ for Selective Catalytic Reduction of NOx at Low Temperature","authors":"Bin Guan, Junyan Chen, Zhongqi Zhuang, Lei Zhu, Zeren Ma, Xuehan Hu, Chenyu Zhu, Sikai Zhao, Kaiyou Shu, Hongtao Dang, Junjie Gao, Luyang Zhang, Tiankui Zhu, Zhen Huang","doi":"10.1007/s10562-024-04914-5","DOIUrl":"10.1007/s10562-024-04914-5","url":null,"abstract":"<div><p>In order to meet the increasingly stringent emission regulations for NO<sub>x</sub> in the exhaust gas of engines, selective catalytic reduction (SCR) technology is extensively studied and practiced. The key to this technology is the catalyst utilized in the chemical reactions of SCR. It is required to develop the SCR catalyst with good low-temperature performance and a wide active temperature window. A series of Cerium-based metal oxides TiCe<sub>m</sub>W<sub>r</sub>O<sub>2−δ</sub> synthesized by solution combustion synthesis is studied in this paper. The SCR activity test was used to select the catalyst with the best performance. The NO conversion rate of the best catalyst in our studies reached 80% at 150 °C, kept 100% from 200 °C to 420 °C and the N<sub>2</sub> selectivity remained above 95% for 100–500 °C. The SO<sub>2</sub> resistance test was carried out at 250 °C and proved that our catalyst had good SO<sub>2</sub> resistance. During the test, the NO conversion rate slightly decreased while 100 ppm SO<sub>2</sub> was injected, but it remained above 80% for 24 h. The NO conversion rate recovered to the original value when the SO<sub>2</sub> supply was cut off. The N<sub>2</sub> selectivity remained at 100% throughout the process. Catalysts were characterized using BET, XRD, and SEM methods. In-situ DRIFTS method was used to study the reaction mechanism of the TiCe<sub>0.2</sub>W<sub>0.2</sub>O<sub>2−δ</sub> catalyst. It showed that the NH<sub>4</sub><sup>+</sup> species absorbed on the Brønsted acid played a dominant role in the SCR reactions. The bridge nitrate resulted from the NO absorption and gas phase NO was involved in the reaction. In conclusion, the mechanism studied included two routes of L-H and E-R.</p><h3>Graphical abstract</h3><div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":508,"journal":{"name":"Catalysis Letters","volume":"155 2","pages":""},"PeriodicalIF":2.3,"publicationDate":"2025-01-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142913012","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Keggin Trimetallo-POM@MIL-101(Cr), Synthesis, Characterization and Catalytic Applications

IF 2.3 4区化学

Catalysis Letters Pub Date : 2025-01-02 DOI: 10.1007/s10562-024-04885-7

Negin Teymouri, Roushan Khoshnavazi, Somayeh Molaei, Nahid Ghadermazi

{"title":"Keggin Trimetallo-POM@MIL-101(Cr), Synthesis, Characterization and Catalytic Applications","authors":"Negin Teymouri, Roushan Khoshnavazi, Somayeh Molaei, Nahid Ghadermazi","doi":"10.1007/s10562-024-04885-7","DOIUrl":"10.1007/s10562-024-04885-7","url":null,"abstract":"<div><p>The Keggin trimetallic polyoxometalates of [A-β-SiW<sub>9</sub>Fe<sub>3</sub>O<sub>37</sub>]<sup>7−</sup> and [A-β-SiW<sub>9</sub>Co<sub>3</sub>O<sub>37</sub>]<sup>10−</sup> were immobilized into the porous metal–organic framework MIL-101(Cr). The structures and properties were characterized with high-resolution transmission electron microscopies (HRTEM), field emission scanning electron microscopy (FESEM), energy-dispersive X-ray spectrometer (EDS), Fourier transform infrared spectroscopy (FTIR), powder X-ray diffraction (XRD)<i>,</i> nitrogen adsorption–desorption isotherm and zeta potential analysis. In this approach, the SiW<sub>9</sub>Fe<sub>3</sub>O<sub>37</sub>@MIL-101 and SiW<sub>9</sub>Co<sub>3</sub>O<sub>37</sub>@MIL-101 composites were synthesized with spherical particles consisting of high surface area (the BET surface area 1368.1 and 1275.8 m<sup>2</sup>/g respectively) and uniform pore size (2.10 and 2.13 nm respectively). The SiW<sub>9</sub>Fe<sub>3</sub>O<sub>37</sub>@MIL-101 and SiW<sub>9</sub>Co<sub>3</sub>O<sub>37</sub>@MIL-101 catalysts demonstrated exceptional performance in synthesizing 5-substituted 1<i>H</i> tetrazoles and oxidation sulfide to sulfones. Incorporating SiW<sub>9</sub>Fe<sub>3</sub>O<sub>37</sub> and SiW<sub>9</sub>Co<sub>3</sub>O<sub>37</sub> polyoxometalates into the MIL-101 matrix provided a high surface area and this unique structure allowed enhanced accessibility of reactants to the catalytic sites.</p><h3>Graphical Abstract</h3>\u0000<div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":508,"journal":{"name":"Catalysis Letters","volume":"155 2","pages":""},"PeriodicalIF":2.3,"publicationDate":"2025-01-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142912897","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

ZSM-23-Supported Nickel Phosphide Catalysts for n-Alkane Hydroisomerization

IF 2.3 4区化学

Catalysis Letters Pub Date : 2025-01-02 DOI: 10.1007/s10562-024-04895-5

Tatyana S. Bogomolova, Marina Yu. Smirnova, Mikhail V. Parfenov, Svetlana V. Cherepanova, Maxim A. Panafidin, Oleg V. Klimov, Alexander S. Noskov

{"title":"ZSM-23-Supported Nickel Phosphide Catalysts for n-Alkane Hydroisomerization","authors":"Tatyana S. Bogomolova, Marina Yu. Smirnova, Mikhail V. Parfenov, Svetlana V. Cherepanova, Maxim A. Panafidin, Oleg V. Klimov, Alexander S. Noskov","doi":"10.1007/s10562-024-04895-5","DOIUrl":"10.1007/s10562-024-04895-5","url":null,"abstract":"<div><p>A series of supported Ni phosphide bifunctional hydroisomerization catalysts (Ni<sub>2</sub>P/ZSM-23/Al<sub>2</sub>O<sub>3</sub>) was synthesized by means of Ni hypophosphite reduction at different temperatures. The structure and morphology of Ni phosphide phase were determined by X-ray diffraction (XRD) and transmission electron microscopy (TEM). The surface chemical analysis was performed using X-ray photoelectron spectroscopy (XPS). The hydro/dehydrogenation and acid functions of catalysts were characterized by CO chemisorption, NH<sub>3</sub>-TPD and IR-spectroscopy of adsorbed pyridine (IR-Py). The reduction of supported precursor at the temperature lying in the range of 550–650 ⁰С resulted in high activity and iso-selectivity in n-decane conversion. The reduction of the supported component at 500 ⁰C or re-reduction of ex-situ reduced and passivated catalysts at 450 ⁰C led to the formation of impurities of other Ni phosphides such as NiP and Ni<sub>5</sub>P<sub>4</sub> and had a negative impact on n-decane conversion. Both the Brønsted acidity and Ni<sub>2</sub>P dispersion of the catalysts declined with increasing Ni<sub>2</sub>P content which were accompanied by a drop in their activity without loss of iso-selectivity.</p><h3>Graphical Abstract</h3><div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":508,"journal":{"name":"Catalysis Letters","volume":"155 2","pages":""},"PeriodicalIF":2.3,"publicationDate":"2025-01-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142912896","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

LED-Light Induced Novel Additive/Base/Metal Free Brønsted Acid Functionalized Porphyrin to Afford N-Arylated Benzimidazole

IF 2.3 4区化学

Catalysis Letters Pub Date : 2025-01-02 DOI: 10.1007/s10562-024-04854-0

Rutuja Ganesh Maske, Pundlik Rambhau Bhagat

{"title":"LED-Light Induced Novel Additive/Base/Metal Free Brønsted Acid Functionalized Porphyrin to Afford N-Arylated Benzimidazole","authors":"Rutuja Ganesh Maske, Pundlik Rambhau Bhagat","doi":"10.1007/s10562-024-04854-0","DOIUrl":"10.1007/s10562-024-04854-0","url":null,"abstract":"<div><p>A convenient method for the C–N bond formation via Brønsted acid functionalized porphyrin (BAFPc) catalyzed reaction of aryl halides with benzimidazole was achieved. In this work, novel BAFPc photocatalyst bearing sulfonic acid functionality, was synthesized, and characterized using <sup>1</sup>H NMR, <sup>13</sup>C NMR, FT-IR, BET, and elemental analysis by SEM/EDAX. The proton level by Hammett acidity function (H<sub>0</sub> = 0.923) and energy band gap (Eg = 1.26 eV) were determined by UV–Visible spectrophotometer. The present metal-free environmental benign route afforded C–N coupling under irradiation of LED-light in lab-made photoreactor in absence of strong base/additive at normal conditions. The photocatalytic reaction was found to be suitable with a variety of aryl halides, (X = Cl, Br) comprising activating and deactivating groups, offering the N-arylated products under given conditions affording satisfactory yield (60 and 58%). Further, this methodology can also be predominantly employed for the construction of C–N derivatives of different heterocycles under optimized conditions with good to admirable yields (49–67%). Moreover, the optimized protocol exhibited competence for C–N coupling of benzyl chloride and benzimidazole to afford drug intermediates like Chlormidazole with good yield (62%). Furthermore, BAFPc, was recycled for 6 times using model reaction supporting heterogeneous and environmental benign protocol.</p><h3>Graphical Abstract</h3><div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":508,"journal":{"name":"Catalysis Letters","volume":"155 2","pages":""},"PeriodicalIF":2.3,"publicationDate":"2025-01-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142912899","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Synthesis of UiO–66–NH2(Ti/Zr) and its Catalytic Conversion of Cellulose to 5-HMF

IF 2.3 4区化学

Catalysis Letters Pub Date : 2025-01-02 DOI: 10.1007/s10562-024-04851-3

Lingling Xu, Xiaomei Pan, Lijing Gao, Ruiping Wei, Jihang Li, Xiu Wen, Yuanzhuang Li, Guomin Xiao

{"title":"Synthesis of UiO–66–NH2(Ti/Zr) and its Catalytic Conversion of Cellulose to 5-HMF","authors":"Lingling Xu, Xiaomei Pan, Lijing Gao, Ruiping Wei, Jihang Li, Xiu Wen, Yuanzhuang Li, Guomin Xiao","doi":"10.1007/s10562-024-04851-3","DOIUrl":"10.1007/s10562-024-04851-3","url":null,"abstract":"<div><p>UiO–66–NH<sub>2</sub>(Ti/Zr) modified by Ti metal oxide (TiO<sub>2</sub>) was used to catalyze the hydrolysis of cellulose to prepare 5-HMF. Under the optimal reaction conditions of H<sub>2</sub>O(NaCl)/THF(1/4 mL), 190 °C, 2 h and 50 mg UNT-3(Ti/Zr) (TiO<sub>2</sub> and UiO–66–NH<sub>2</sub> with mass of 1.5 and 0.1 g, respectively), the yield of 5-hydroxymethylfurfural reached 59.88%. UiO–66–NH<sub>2</sub>(Ti/Zr) nanocomposites with different mass ratios were successfully prepared by simple solvent evaporation method. SEM and TEM have shown that the modified UiO–66–NH<sub>2</sub>(Ti/Zr) are wrapped into sphere by TiO<sub>2</sub> densely attached to the surface of UiO–66–NH<sub>2</sub>, which provides favorable conditions for the uniform dispersion of TiO<sub>2</sub> and coordination of the Lewis acidic site of UiO–66–NH<sub>2</sub>. NH<sub>3</sub>–TPD results confirmed the existence of super-strong, strong, middle and weak acid sites in UiO–66–NH<sub>2</sub>(Ti/Zr), and Py-FTIR confirmed the existence of Brønsted and Lewis acids. After four cycles, the yield of 5-HMF and FUR decreased slightly from 59.88 to 51.89% and 9.11 to 7.66%, respectively, and the yield of 5-HMF could still remain above 50%. The results showed that the modified composite treatment of TiO<sub>2</sub> with rich Lewis acid/base and UiO–66–NH<sub>2</sub> could provide a certain idea for the extensive application of biomass research in the future.</p><h3>Graphic Abstract</h3>\u0000<div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":508,"journal":{"name":"Catalysis Letters","volume":"155 2","pages":""},"PeriodicalIF":2.3,"publicationDate":"2025-01-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142912894","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Novel Zn4In2S7 Loaded Mg/N Doped CQDs Composites with Improved Visible-Light Photocatalytic Properties for Depolymerization of Sodium Lignosulfonate

IF 2.3 4区化学

Catalysis Letters Pub Date : 2025-01-02 DOI: 10.1007/s10562-024-04899-1

Jinhai Hu, Guanhong He, Kai Zhang, Yilin Wu, Hong Yan

{"title":"Novel Zn4In2S7 Loaded Mg/N Doped CQDs Composites with Improved Visible-Light Photocatalytic Properties for Depolymerization of Sodium Lignosulfonate","authors":"Jinhai Hu, Guanhong He, Kai Zhang, Yilin Wu, Hong Yan","doi":"10.1007/s10562-024-04899-1","DOIUrl":"10.1007/s10562-024-04899-1","url":null,"abstract":"<div><p>Photocatalysis purifies industrial paper wastewater by selectively breaking bonding bonds in lignin. To address the shortcomings of single photocatalysts such as narrow photoresponsive region, high photogenerated carrier complexation rate, and low photocatalytic activity. In this paper, Mg and N doped carbon quantum dots (Mg/N doped CQDs) were prepared by hydrothermal method. Then Zn<sub>4</sub>In<sub>2</sub>S<sub>7</sub> series catalysts with different loadings (0, 0.3, 0.6, 1.2 wt %) of Mg/N doped CQDs (denoted as ZIS 350 °C, ZIS-3 350 °C, ZIS-6 350 °C, ZIS-12 350 °C) were constructed based on condensation reflux and inert gas calcination method. The catalyst possesses highly efficient visible light-catalyzed depolymerization of sodium lignosulfonate (SLS), an industrial waste material. From the BET curve, the specific surface area of ZIS-6 350 °C was the largest. The composite of Mg/N doped CQDs reduced the band gap of Zn<sub>4</sub>In<sub>2</sub>S<sub>7</sub> while promoting the separation and transfer of photogenerated electrons/holes, as confirmed by DRS, Mott-Schottky, transient photocurrent and EIS analyses. From the photocatalytic activity test, the photocatalytic depolymerization of lignin by ZIS-6 350 °C was increased by 21.2% compared with that of ZIS 350 °C, and the reactions all follow the pseudo first order kinetic model. A possible photocatalytic mechanism was proposed based on the active species capture experiments.</p><h3>Graphical Abstract</h3>\u0000<div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":508,"journal":{"name":"Catalysis Letters","volume":"155 2","pages":""},"PeriodicalIF":2.3,"publicationDate":"2025-01-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142912898","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0