The editors of Catalysis Research would like to express their sincere gratitude to the following reviewers for assessing manuscripts in 2022. We greatly appreciate the contribution of expert reviewers, which is crucial to the journal’s editorial process. We aim to recognize reviewer contributions through several mechanisms, of which the annual publication of reviewer names is one. Reviewers receive a voucher entitling them to a discount on their next LIDSEN publication and can download a certificate of recognition directly from our submission system. Additionally, reviewers can sign up to the service Publons (https://publons.com) to receive recognition. Of course, in these initiatives we are careful not to compromise reviewer confidentiality. Many reviewers see their work as a voluntary and often unseen part of their role as researchers. We are grateful to the time reviewers donate to our journals and the contribution they make.
{"title":"Acknowledgement to Reviewers of Catalysis Research in 2022","authors":"Catalysis Research Editorial Office","doi":"10.21926/cr.2301003","DOIUrl":"https://doi.org/10.21926/cr.2301003","url":null,"abstract":"The editors of Catalysis Research would like to express their sincere gratitude to the following reviewers for assessing manuscripts in 2022. We greatly appreciate the contribution of expert reviewers, which is crucial to the journal’s editorial process. We aim to recognize reviewer contributions through several mechanisms, of which the annual publication of reviewer names is one. Reviewers receive a voucher entitling them to a discount on their next LIDSEN publication and can download a certificate of recognition directly from our submission system. Additionally, reviewers can sign up to the service Publons (https://publons.com) to receive recognition. Of course, in these initiatives we are careful not to compromise reviewer confidentiality. Many reviewers see their work as a voluntary and often unseen part of their role as researchers. We are grateful to the time reviewers donate to our journals and the contribution they make.","PeriodicalId":178524,"journal":{"name":"Catalysis Research","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-01-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130486880","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
The development of noble metal-free catalyst for hydrogen evolution reaction (HER) is the primary challenge in fuel production to replace fossil fuels. Here, we have synthesized Fe-doped TiO2/PANI nanocomposite via facile in situ polymerization method and studied its electrocatalytic activity towards HER. The composite catalyzes HER efficiently with an overpotential value of -180 mV vs. RHE in 0.5 M H2SO4 solution to achieve the current density of 10 mA cm-2 and also possesses unique stability of 8 h. However, a unique balance of PANI content must be maintained to draw the maximum efficiency from the conjuncture of active Fe-doped TiO2 particles and PANI. The catalytic efficiency of PANI is upgraded by interfacial electronic coupling with Fe-doped TiO2, due to which the antibonding states of nitrogen atom got occupied, leading to a weaker interaction between adsorbate hydrogen and catalyst surface and enhancing the rapid desorption of H2.
无贵金属析氢催化剂的开发是燃料生产中替代化石燃料的首要挑战。本文采用原位聚合法合成了fe掺杂TiO2/PANI纳米复合材料，并研究了其对HER的电催化活性。复合材料在0.5 M H2SO4溶液中高效催化HER，过电位值为-180 mV vs. RHE，电流密度为10 mA cm-2，并具有独特的8 h稳定性。然而，必须保持独特的PANI含量平衡，才能从活性fe掺杂TiO2颗粒和PANI的结合中获得最大的效率。通过与fe掺杂TiO2的界面电子偶联，提高了PANI的催化效率，从而占据了氮原子的反键态，使得吸附氢与催化剂表面的相互作用减弱，增强了H2的快速脱附。
{"title":"Iron Doped Titania/Polyaniline Composite: An Efficient Electrocatalyst for Hydrogen Evolution Reaction in Acidic Medium","authors":"Suman Lahkar, Richa Brahma, S. Dolui","doi":"10.21926/cr.2301002","DOIUrl":"https://doi.org/10.21926/cr.2301002","url":null,"abstract":"The development of noble metal-free catalyst for hydrogen evolution reaction (HER) is the primary challenge in fuel production to replace fossil fuels. Here, we have synthesized Fe-doped TiO2/PANI nanocomposite via facile in situ polymerization method and studied its electrocatalytic activity towards HER. The composite catalyzes HER efficiently with an overpotential value of -180 mV vs. RHE in 0.5 M H2SO4 solution to achieve the current density of 10 mA cm-2 and also possesses unique stability of 8 h. However, a unique balance of PANI content must be maintained to draw the maximum efficiency from the conjuncture of active Fe-doped TiO2 particles and PANI. The catalytic efficiency of PANI is upgraded by interfacial electronic coupling with Fe-doped TiO2, due to which the antibonding states of nitrogen atom got occupied, leading to a weaker interaction between adsorbate hydrogen and catalyst surface and enhancing the rapid desorption of H2.","PeriodicalId":178524,"journal":{"name":"Catalysis Research","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-01-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126296161","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Fischer-Tropsch reactors operated in a steady state suffer from a low pore effectiveness factor and a high methane selectivity caused by internal mass transfer limitations due to the accumulation of long-chain hydrocarbons inside the catalyst pores. Therefore, an alternating process switching between Fischer-Tropsch synthesis (FTS) and drainage of the pores by hydrogenolysis is proposed. The periodical cracking of the accumulated waxes within the (partially) filled pores, realized by a switch from syngas (H2, CO) to pure hydrogen, results in a higher overall catalyst productivity and a more favorable product distribution. The influence of temperature and time of FTS on drainage time and product distribution was experimentally investigated at typical temperatures of FT fixed bed processes in a range of 210 to 240°C. Alternating drainage of the pores by hydrogenolysis at a hydrogen partial pressure of just 1 bar leads to an improvement of the rate of CO conversion by up to 90% (240°C, 2 h FTS) and an improvement of even 120% concerning the rate of production of non-methane hydrocarbons (240°C, 2 h FTS).
在稳定状态下运行的费托反应器，由于长链烃在催化剂孔内的积累而造成内部传质限制，导致孔隙有效系数低，甲烷选择性高。因此，提出了在费托合成(FTS)和氢解排孔之间交替转换的工艺。由合成气(H2, CO)转换为纯氢，在(部分)填充的孔隙中积累的蜡质周期性开裂，导致更高的整体催化剂生产率和更有利的产物分布。在210 ~ 240℃的典型FT固定床工艺温度范围内，实验研究了FT温度和时间对排液时间和产物分布的影响。在氢分压仅为1 bar的条件下，通过氢解交替排气孔，可将CO转化率提高90%(240°C, 2 h FTS)，并将非甲烷碳氢化合物的生产速率提高120%(240°C, 2 h FTS)。
{"title":"Enhancement of Fischer-Tropsch Synthesis by Periodical Draining of the Wax-Filled Pores of a Cobalt Catalyst by Hydrogenolysis","authors":"Carsten Unglaub, J. Tiessen, A. Jess","doi":"10.21926/cr.2301001","DOIUrl":"https://doi.org/10.21926/cr.2301001","url":null,"abstract":"Fischer-Tropsch reactors operated in a steady state suffer from a low pore effectiveness factor and a high methane selectivity caused by internal mass transfer limitations due to the accumulation of long-chain hydrocarbons inside the catalyst pores. Therefore, an alternating process switching between Fischer-Tropsch synthesis (FTS) and drainage of the pores by hydrogenolysis is proposed. The periodical cracking of the accumulated waxes within the (partially) filled pores, realized by a switch from syngas (H2, CO) to pure hydrogen, results in a higher overall catalyst productivity and a more favorable product distribution. The influence of temperature and time of FTS on drainage time and product distribution was experimentally investigated at typical temperatures of FT fixed bed processes in a range of 210 to 240°C. Alternating drainage of the pores by hydrogenolysis at a hydrogen partial pressure of just 1 bar leads to an improvement of the rate of CO conversion by up to 90% (240°C, 2 h FTS) and an improvement of even 120% concerning the rate of production of non-methane hydrocarbons (240°C, 2 h FTS).","PeriodicalId":178524,"journal":{"name":"Catalysis Research","volume":"6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-01-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114145642","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Linear atomic chain (LAC) gold nanowires (Au-NWs) containing oxygen impurities are materials that could be used as supports to stimulate chemical reactions. Its peculiar structural characteristics, such as abnormal Au-Au bonds, make it interesting to explore the chemical reactions of this material at a theoretical level. This work investigated the chemical reaction of ethanol supported on Au-NW containing two oxygen impurities. Using ab initio molecular dynamics simulations, it was shown that the presence of oxygen impurity in the LAC conditions the minimum energy paths (MEP) that ethanol will follow in its chemical transformation. When the structure of the LAC contains two oxygen impurities, the formation of acetaldehyde and acetic acid as reaction products were observed. Specifically, the presence of two oxygen impurities in the LAC favors the migration of hydrogens of the -CH2- and -OH groups of ethanol towards the LAC. In addition, it was observed that the formation of the C-O bond was favored, which implies an additional reaction intermediate that leads to a total of two different reaction paths in ethanol oxidation.
{"title":"Ethanol Oxidation on Gold Nanowire Containing Oxygen Impurities: A Study by Ab Initio Molecular Dynamics Simulations","authors":"Otto V M Bueno, M. San-Miguel, E. D. da Silva","doi":"10.21926/cr.2204043","DOIUrl":"https://doi.org/10.21926/cr.2204043","url":null,"abstract":"Linear atomic chain (LAC) gold nanowires (Au-NWs) containing oxygen impurities are materials that could be used as supports to stimulate chemical reactions. Its peculiar structural characteristics, such as abnormal Au-Au bonds, make it interesting to explore the chemical reactions of this material at a theoretical level. This work investigated the chemical reaction of ethanol supported on Au-NW containing two oxygen impurities. Using ab initio molecular dynamics simulations, it was shown that the presence of oxygen impurity in the LAC conditions the minimum energy paths (MEP) that ethanol will follow in its chemical transformation. When the structure of the LAC contains two oxygen impurities, the formation of acetaldehyde and acetic acid as reaction products were observed. Specifically, the presence of two oxygen impurities in the LAC favors the migration of hydrogens of the -CH2- and -OH groups of ethanol towards the LAC. In addition, it was observed that the formation of the C-O bond was favored, which implies an additional reaction intermediate that leads to a total of two different reaction paths in ethanol oxidation.","PeriodicalId":178524,"journal":{"name":"Catalysis Research","volume":"77 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-12-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127097910","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Martin Khzouz, B. Fakhim, S. Babaa, Mohammad Ghaleeh, Farooq Sher, E. Gkanas
{"title":"Development and Testing of Ni-Cu Bimetallic Catalysts for Effective Syngas Production via Low-Temperature Methane Steam Reforming","authors":"Martin Khzouz, B. Fakhim, S. Babaa, Mohammad Ghaleeh, Farooq Sher, E. Gkanas","doi":"10.35702/catalres.10004","DOIUrl":"https://doi.org/10.35702/catalres.10004","url":null,"abstract":"","PeriodicalId":178524,"journal":{"name":"Catalysis Research","volume":"40 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-12-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122389075","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Fabrication, arrangement, and controllable composition of ordered organometallic films are critical for designing a highly active catalyst and investigating the catalytic mechanism. In this paper, an organometallic terpyridine Pd(II)/Ni(II) monolayer linked on the silicon substrate surface (denoted as Si-Tpy-Pd1/Ni1) was prepared and characterized using water contact angle, ultraviolet spectra, X-ray diffraction, scanning electron microscopy, and X-ray photoelectron microscopy. Si-Tpy-Pd1/Ni1 exhibited high catalytic activity, substrate applicability, and reusability after 5 runs. During recycling, the deactivation was induced by the aggregation of active Pd/Ni nanoparticles. The catalytic mechanism was heterogeneous and occurred on the Si-Tpy-Pd1/Ni1 monolayer surface; the mechanism was confirmed using hot filtrate, poison test, and a three-phase experiment. The real active center was Pdδ–/Niδ+ and was formed in situ on the organometallic monolayer surface, which acted as a precursor with a synergistic effect between Pd and Ni. The electron density of Pd became more negative because of electron transfer from Ni to Pd, which facilitated the oxidative addition reaction.
{"title":"Fabrication and Catalytic Property of an Ordered Terpyridine Pd(II)/Ni(II) Catalytic Monolayer for Suzuki Coupling Reactions","authors":"Wen Wang, Sa Bi, Huanhuan Li, Tiesheng Li","doi":"10.21926/cr.2204042","DOIUrl":"https://doi.org/10.21926/cr.2204042","url":null,"abstract":"Fabrication, arrangement, and controllable composition of ordered organometallic films are critical for designing a highly active catalyst and investigating the catalytic mechanism. In this paper, an organometallic terpyridine Pd(II)/Ni(II) monolayer linked on the silicon substrate surface (denoted as <strong>Si-Tpy-Pd<sub>1</sub>/Ni<sub>1</sub></strong>) was prepared and characterized using water contact angle, ultraviolet spectra, X-ray diffraction, scanning electron microscopy, and X-ray photoelectron microscopy. <strong>Si-Tpy-Pd<sub>1</sub>/Ni<sub>1</sub></strong> exhibited high catalytic activity, substrate applicability, and reusability after 5 runs. During recycling, the deactivation was induced by the aggregation of active Pd/Ni nanoparticles. The catalytic mechanism was heterogeneous and occurred on the <strong>Si-Tpy-Pd<sub>1</sub>/Ni<sub>1</sub></strong> monolayer surface; the mechanism was confirmed using hot filtrate, poison test, and a three-phase experiment. The real active center was Pd<sup>δ</sup><sup>–</sup>/Ni<sup>δ+</sup> and was formed in situ on the organometallic monolayer surface, which acted as a precursor with a synergistic effect between Pd and Ni. The electron density of Pd became more negative because of electron transfer from Ni to Pd, which facilitated the oxidative addition reaction.","PeriodicalId":178524,"journal":{"name":"Catalysis Research","volume":"129 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-12-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115890552","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
In this study, a PoC (Proof of Concept) of a possible biomass valorization of flax and camelina oilseed press cakes was presented. Biocatalyzed hydrolysis of residual oils and proteins extracted from these wastes was studied. The biotransformation of oils was performed using commercial immobilized lipases, including Amano PS, Amano AK, and Candida Antarctica Lipase B (CALB). Acylglycerols were partially or fully hydrolyzed using Amano PS and AK. Triglycerides were not hydrolyzed by CALB, which behaved differently. Enzymatic hydrolysis of the proteins extracted from these cakes was performed using commercial proteases, including Amano Protease P and Amano Protease M. This was the first study to quantify the amino acids in the reaction products. The results were also compared to the hydrolysates obtained using 6 M HCl. Some differences were observed in the amino acid profiles depending on the enzyme used and the protein sample.
在这项研究中，一个PoC(概念证明)可能的生物质增值亚麻和亚麻荠压榨饼。研究了从这些废物中提取的残油和残蛋白的生物催化水解。油脂的生物转化使用商业固定化脂肪酶进行，包括Amano PS, Amano AK和Candida Antarctica Lipase B (CALB)。用Amano PS和AK对酰基甘油进行部分或完全水解。甘油三酯不被CALB水解，其表现不同。利用商业蛋白酶(包括天野蛋白酶P和天野蛋白酶m)对从这些饼中提取的蛋白质进行酶解。这是第一次对反应产物中的氨基酸进行量化的研究。结果还与使用6 M HCl得到的水解产物进行了比较。在氨基酸谱中观察到一些差异，这取决于所使用的酶和蛋白质样品。
{"title":"Biocatalyzed Hydrolysis of Residual Oils and Proteins from Flax and Camelina Oilseed Press Cakes Using Lipase and Protease","authors":"O. Piccolo, E. Parodi, A. Petri","doi":"10.21926/cr.2204041","DOIUrl":"https://doi.org/10.21926/cr.2204041","url":null,"abstract":"In this study, a PoC (Proof of Concept) of a possible biomass valorization of flax and camelina oilseed press cakes was presented. Biocatalyzed hydrolysis of residual oils and proteins extracted from these wastes was studied. The biotransformation of oils was performed using commercial immobilized lipases, including Amano PS, Amano AK, and Candida Antarctica Lipase B (CALB). Acylglycerols were partially or fully hydrolyzed using Amano PS and AK. Triglycerides were not hydrolyzed by CALB, which behaved differently. Enzymatic hydrolysis of the proteins extracted from these cakes was performed using commercial proteases, including Amano Protease P and Amano Protease M. This was the first study to quantify the amino acids in the reaction products. The results were also compared to the hydrolysates obtained using 6 M HCl. Some differences were observed in the amino acid profiles depending on the enzyme used and the protein sample.","PeriodicalId":178524,"journal":{"name":"Catalysis Research","volume":"34 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-11-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122928867","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Interpreting the relationship between the activity and structure of β-galactosidase is necessary to perceive the impact of the enzyme’s conformation on its catalysis. The current study thoroughly explains the effects of additives such as ethylenediaminetetraacetic acid (EDTA), sodium dodecyl sulfate (SDS), dithiothreitol (DTT), and urea on β-galactosidase activity and structure. β-Galactosidase activity was determined at various ionic strengths and temperatures as a function of time. Structural studies evaluating changes in the secondary and tertiary structures of the enzyme in the presence of the additives were conducted using ultraviolet (UV)-visible and intrinsic fluorescence spectroscopy. The immobilized enzyme showed enhanced stability under different environmental conditions. Activity assays demonstrated concentration-dependent inactivation of β-galactosidase in the presence of SDS and urea, which suggests that hydrophobic and charged residues are present near the active site. In the presence of EDTA, loss in activity was noted, which confirms that β-galactosidase is a metalloenzyme. Enhancement in enzyme activity in the presence of DTT suggests the presence of a cysteine residue near the catalytic center. In UV-visible and intrinsic fluorescence spectroscopy studies, the native enzyme showed significant conformational transitions in the presence of DTT, SDS, and urea and very few changes in the presence of EDTA. However, the immobilized enzyme could resist significant structural changes. In conclusion, this study provides a detailed description of the association between the activity and conformational stability of β-galactosidase.
{"title":"Effect of Different Additives on the Structure and Activity of β-Galactosidase Immobilized on a Concanavalin A–Modified Silica-Coated Titanium Dioxide Nanocomposite","authors":"A. Shafi, Q. Husain","doi":"10.21926/cr.2204040","DOIUrl":"https://doi.org/10.21926/cr.2204040","url":null,"abstract":"Interpreting the relationship between the activity and structure of β-galactosidase is necessary to perceive the impact of the enzyme’s conformation on its catalysis. The current study thoroughly explains the effects of additives such as ethylenediaminetetraacetic acid (EDTA), sodium dodecyl sulfate (SDS), dithiothreitol (DTT), and urea on β-galactosidase activity and structure. β-Galactosidase activity was determined at various ionic strengths and temperatures as a function of time. Structural studies evaluating changes in the secondary and tertiary structures of the enzyme in the presence of the additives were conducted using ultraviolet (UV)-visible and intrinsic fluorescence spectroscopy. The immobilized enzyme showed enhanced stability under different environmental conditions. Activity assays demonstrated concentration-dependent inactivation of β-galactosidase in the presence of SDS and urea, which suggests that hydrophobic and charged residues are present near the active site. In the presence of EDTA, loss in activity was noted, which confirms that β-galactosidase is a metalloenzyme. Enhancement in enzyme activity in the presence of DTT suggests the presence of a cysteine residue near the catalytic center. In UV-visible and intrinsic fluorescence spectroscopy studies, the native enzyme showed significant conformational transitions in the presence of DTT, SDS, and urea and very few changes in the presence of EDTA. However, the immobilized enzyme could resist significant structural changes. In conclusion, this study provides a detailed description of the association between the activity and conformational stability of β-galactosidase.","PeriodicalId":178524,"journal":{"name":"Catalysis Research","volume":"29 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-11-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114497892","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Organic compounds are one of the most severe pollutants occurring in the environment. Hence, it is important to remove these compounds from the environment through remediation processes such as photocatalysis. The present study investigated the photocatalytic degradation of p-nitrophenol (NP) and phenol red (PR) using a cerium oxide-titanium oxide nanocomposite (CeO2-TiO2nc) under UV light. CeO2-TiO2nc was synthesized using the co-precipitation method. An X-ray diffraction (XRD) analysis confirmed the phase purity of the material. A UV-Vis absorption study revealed a broad peak in the 250–310 nm region. The photocatalytic study was performed under three irradiation conditions: no light, visible light (λ > 400 nm), and UV light (λ < 400 nm). The maximum degradation percentage for NP and PR was 97.3% and 99.8%, respectively, with the reaction rate constant (k) of 0.42 and 0.54, respectively. This is the first study to utilize the synergistic effects of TiO2 and CeO2 for degrading NP and PR. Over 97% degradation was achieved for both the compounds in 80 min; this result shows the high photocatalytic activity of CeO2-TiO2nc. Thus, CeO2-TiO2nc can be used as a cost-effective adsorbent with a high capacity to degrade harmful organic compounds.
{"title":"Enhanced Photocatalytic Degradation of p-Nitrophenol and Phenol Red Through Synergistic Effects of a CeO2-TiO2 Nanocomposite","authors":"Pawan S. Rana, P. Solanki, T. Dhiman, A. Ahlawat","doi":"10.21926/cr.2204039","DOIUrl":"https://doi.org/10.21926/cr.2204039","url":null,"abstract":"Organic compounds are one of the most severe pollutants occurring in the environment. Hence, it is important to remove these compounds from the environment through remediation processes such as photocatalysis. The present study investigated the photocatalytic degradation of p-nitrophenol (NP) and phenol red (PR) using a cerium oxide-titanium oxide nanocomposite (CeO2-TiO2nc) under UV light. CeO2-TiO2nc was synthesized using the co-precipitation method. An X-ray diffraction (XRD) analysis confirmed the phase purity of the material. A UV-Vis absorption study revealed a broad peak in the 250–310 nm region. The photocatalytic study was performed under three irradiation conditions: no light, visible light (λ > 400 nm), and UV light (λ < 400 nm). The maximum degradation percentage for NP and PR was 97.3% and 99.8%, respectively, with the reaction rate constant (k) of 0.42 and 0.54, respectively. This is the first study to utilize the synergistic effects of TiO2 and CeO2 for degrading NP and PR. Over 97% degradation was achieved for both the compounds in 80 min; this result shows the high photocatalytic activity of CeO2-TiO2nc. Thus, CeO2-TiO2nc can be used as a cost-effective adsorbent with a high capacity to degrade harmful organic compounds.","PeriodicalId":178524,"journal":{"name":"Catalysis Research","volume":"17 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-11-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125675102","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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