Article
Materials Science, Ceramics
Zhenghe Zhang, Jing Tan, Lisheng Cheng, Weimin Yang
Summary: This study proposed a facile and efficient approach to enhance the photocatalytic activity of CO2 reduction into CH4 and CO by forming a carbon nano layer on the surface of TiO2. The carbon nano-layer coated TiO2 showed superior production rates compared to unmodified counterparts, making it a promising alternative for large-scale application.
CERAMICS INTERNATIONAL
(2021)
Article
Energy & Fuels
Di Li, Changjian Zhou, Zhongkai Xie, Donghai Chen, Yimeng Zhou, Xiangli Shi, Deli Jiang, Min Chen, Weidong Shi
Summary: By designing a Pd/Cu2O/TiO2 ternary hybrid photocatalyst, high-efficiency and highly selective photocatalytic reduction of CO2 into CH4 is achieved, with a CH4 production rate of 42.8 mu mol g(-1) h(-1) and a selectivity of 99.5%. This is attributed to the consecutive multistep charge transfer between the Cu2O/TiO2 heterojunction and Pd in the hybrid catalyst, leading to a spatially separated electron-enriched surface (Pd) and hole-enriched surface (Cu2O) that contribute to the high conversion rate and selectivity of CH4.
Article
Chemistry, Multidisciplinary
Weina Shi, Ji-Chao Wang, Aimin Chen, Xin Xu, Shuai Wang, Renlong Li, Wanqing Zhang, Yuxia Hou
Summary: In this study, Cu and Cu2O hybrid nanoparticles were synthesized onto the WO3 nanoflake film using a one-step electrodeposition method. The heterojunction consisting of WO3 flakes and Cu2O played a critical role in achieving excellent performance for CO2 photoreduction. The modified Cu nanoparticles significantly increased the selectivity of CH4 and reduced the selectivity of CO. The yields of CH4, H2, and O2 reached high levels after 24 hours of visible light irradiation.
Article
Chemistry, Applied
Marie Duflot, Clement Marchal, Valerie Caps, Vincent Artero, Konstantinos Christoforidis, Valerie Keller
Summary: Here, we optimized NH2-UiO-66/TiO2/Au (ca. 1.5 wt%) composite photocatalysts for gas phase CO2 photocatalytic reduction with water as reducing agent by adjusting NH2-UiO-66/TiO2 ratio and pH during synthesis. It was found that the 10 wt% NH2-UiO-66/TiO2/Au (at pH=7) composite showed the highest cumulated CH4 production rate of 136 mu mol/gcatalyst with 70% electronic selectivity over a 5-hour continuous test. This composite achieved the best compromise between MOF surface area, CO2 adsorption sites, visible light absorption capacity, and a large interface contact area, which facilitated efficient charge carrier transfer from metal(Zr) to metal(Ti). Au deposition by impregnation/chemical reduction was necessary for CO2 photoreduction and may serve as electron traps, co-catalyst, or surface plasmon resonator.
Article
Chemistry, Multidisciplinary
Weixin Zou, Yingyi Cheng, Yu-Xin Ye, Xiaoqian Wei, Qing Tong, Lin Dong, Gangfeng Ouyang
Summary: This study successfully synthesized a metal-free photocatalyst for non-sacrificial photocatalytic CO2 reduction to CH4 and easily separable H2O2. The obtained CH4 product is two orders of magnitude higher than that of previous metal-free photocatalysts. In situ characterizations and calculations revealed a multi-step reaction mechanism.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Article
Chemistry, Multidisciplinary
Hong-ping Zhang, Run Zhang, Chenghua Sun, Yan Jiao, Yaping Zhang
Summary: This study investigates the potential of a single Cu atom doped phosphorene catalyst for CO2 electroreduction and finds that it improves the performance by lowering limiting potential values. Through analysis, it is discovered that CH4 is the most likely product.
Article
Chemistry, Multidisciplinary
Yahui Wu, Chunjun Chen, Xupeng Yan, Ruizhi Wu, Shoujie Liu, Jun Ma, Jianling Zhang, Zhimin Liu, Xueqing Xing, Zhonghua Wu, Buxing Han
Summary: In this study, Cu nanoparticles supported on N-doped carbon were designed for the electroreduction of CO2 to CH4. The catalyst exhibited outstanding performance with high FE and current density, providing a new approach for producing CH4.
Article
Chemistry, Physical
Shiping Li, Najmul Hasan, Fuchun Zhang, Jong-Seong Bae, Chunli Liu
Summary: The self-assembled 2D/2D step-scheme (S-scheme) photocatalyst Bi2MoO6/Zn3V2O8 exhibited efficient interfacial charge transfer and separation. The optimized composition of 30% BMO/ZVO showed enhanced light absorption and carrier separation efficiency. Density functional theory calculations revealed the presence of a built-in electric field at the interface, facilitating the separation of photogenerated electron-hole pairs.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2023)
Article
Chemistry, Multidisciplinary
Abdullahi Adamu, Mark Isaacs, Kamelia Boodhoo, Fernando Russo Abegao
Summary: This work aimed to enhance the photocatalytic activity of TiO2 in CO2 reduction. TiO2 and Cu/TiO2 at 5 wt% copper bulk loading were synthesized using the sol-gel method. Cu was also doped into the commercial TiO2 samples via the incipient wetness method. Low pH and copper inhibited the transformation of anatase to rutile. Copper existed in Cu(I) and Cu(II) states, and the Cu(I) to Cu(II) ratio was closely related to the anatase to rutile ratio. The study demonstrated the synergistic effect of the anatase-rutile mixture, reaction pH, and copper dopant in improving the photocatalytic activity of TiO2.
JOURNAL OF CO2 UTILIZATION
(2023)
Article
Chemistry, Multidisciplinary
Yuke Zheng, Zitao Duan, Ruoxuan Liang, Ruiqi Lv, Chong Wang, Zhaoxia Zhang, Shaolong Wan, Shuai Wang, Haifeng Xiong, Chee Keong Ngaw, Jingdong Lin, Yong Wang
Summary: The photocatalytic conversion of CO2 into solar fuels or chemicals is a sustainable solution to address global warming and the energy crisis. This study investigates the effects of morphological control on a Cu/Cu2O-based photocatalyst for CO2 reduction. The results show that the spherical Cu/Cu2O photocatalyst has higher activity compared to the octahedral one, which can be attributed to the multifaceted structure favoring charge separation and the presence of unfavorable (111) facets in the octahedral Cu/Cu2O.
Article
Engineering, Environmental
Chenlong Yan, Mengyang Xu, Wangye Cao, Qidi Chen, Xianghai Song, Pengwei Huo, Weiqiang Zhou, Huiqin Wang
Summary: This study successfully constructed BiOBr/Cu2O heterojunctions for efficient conversion of CO2 to CH4. Through various characterization methods, it was confirmed that BiOBr/Cu2O had strong photogenerated carrier transfer and separation abilities and the presence of key intermediates favorable for CH4 production was discovered.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2023)
Article
Chemistry, Physical
Yipeng Zhou, Wenyu Jiao, Yu Xie, Fan He, Yun Ling, Qi Yang, Jinsheng Zhao, Hao Ye, Yang Hou
Summary: A novel ZnFe2O4/Bi2MoO6 heterojunction photocatalyst was synthesized, which exhibited improved photocatalytic efficiency for CO2 reduction.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2022)
Article
Engineering, Environmental
Manuel Alejandro Avila-Lopez, Jeannie Z. Y. Tan, E. Luevano-Hipolito, Leticia M. Torres-Martinez, M. Mercedes Maroto-Valer
Summary: CO2 capture and photocatalytic reduction to hydrocarbons is an interesting and challenging area. This study selected copper and nickel oxides as photocatalysts and immobilized them on commercial glass fiber substrates using a simple method. The results showed that copper oxide photocatalysts exhibited high selectivity in both continuous and batch systems, while nickel oxide had lower selectivity and efficiency.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2022)
Article
Materials Science, Multidisciplinary
Lisha Jiang, Yuan Li, Xiaoyong Wu, Gaoke Zhang
Summary: Oxygen vacancy-rich bismuth oxysulfide (Bi2O2S) with a layered structure was prepared as an efficient photocatalyst for CO2 reduction under visible light. The presence of abundant oxygen vacancies in Bi2O2S enhances CO2 adsorption, activation abilities, and carrier separation efficiency. This study provides insights into developing Bi-O-S photocatalysts through defect engineering for photocatalytic CO2 reduction.
SCIENCE CHINA-MATERIALS
(2021)
Article
Chemistry, Physical
Mengmeng Ni, Lihong Wang, Yao Chai, Bing Wang, Dongmiao Li, Jinni Shen, Zizhong Zhang, Xuxu Wang
Summary: This study prepared CsBi2Ta5O16 as a photocatalyst for the first time and investigated its ability to convert CO2 and H2O into value-added products through photocatalysis. NiO-loaded CsBi2Ta5O16 composites showed efficient photocatalytic conversion of CO2 into CH4 and CO, and oxidation of H2O to O-2. The enhanced CO2 photocatalytic conversion was attributed to the adsorption and activation of CO2 on NiO. This work provides a design idea for a photocatalyst that enables the full reaction of CO2 with H2O.
APPLIED SURFACE SCIENCE
(2022)
Article
Green & Sustainable Science & Technology
Ignacio Alvarez-Prada, Daniel Peral, Mary Song, Jose Munoz, Nuria Romero, Lluis Escriche, Amitava Acharjya, Arne Thomas, Reinhard Schomacker, Michael Schwarze, Xavier Sala, Minoo Tasbihi, Jordi Garcia-Anton
Summary: In this study, Ru(0) nanoparticles were stabilized onto different carbon nanomaterials for photocatalytic hydrogen evolution reaction, resulting in significant enhancement of HER activity when mixed with mesoporous graphitic carbon nitride. The hybrid materials showed outstanding performance compared to pristine materials and a detailed investigation on the fate of nanohybrids after catalysis was presented.
Article
Energy & Fuels
Michael Schwarze, Tabea A. Thiel, Minoo Tasbihi, Michael Schroeter, Prashanth W. Menezes, Carsten Walter, Matthias Driess, Reinhard Schomaecker
Summary: In this study, cellulose-supported TiO2 photocatalysts were prepared to produce active films for hydrogen production, which showed comparable activity to traditional drop-coating methods. The aggregation behavior of cellulose was utilized to produce photocatalytically active films, providing a simple and versatile method for different types of (photo)catalysts. However, further improvements are needed to enhance the stability of the films during reaction.
Article
Chemistry, Inorganic & Nuclear
Ignacio Alvarez-Prada, Anh Dung Nguyen, Nuria Romero, Heting Hou, Elisabetta Benazzi, Lluis Escriche, Amitava Acharjya, Arne Thomas, Michael Schwarze, Reinhard Schomaecker, Xavier Sala, Mirco Natali, Jordi Garcia-Anton, Minoo Tasbihi
Summary: Ru or Pt nanoparticles were prepared using the organometallic approach and deposited onto the surface of mesoporous graphitic carbon nitride (mpg-CN). Photocatalytic experiments showed that Pt-decorated mpg-CN exhibited higher hydrogen production and better stability compared to Ru-based samples, due to improved electron transfer kinetics from mpg-CN to the metal nanoparticles.
DALTON TRANSACTIONS
(2022)
Article
Chemistry, Physical
Emilia Alwin, Robert Wojcieszak, Kamila Koci, Miroslava Edelmannova, Michal Zielinski, Agata Suchora, Tomasz Pedzinski, Mariusz Pietrowski
Summary: This study introduced Pt, Ru, and Ir onto the surface of g-C3N4 through the wet impregnation method and induced structural changes through hydrogen reduction. The results showed that the structural changes significantly enhanced the photocatalytic activity, with the enhanced activity mainly attributed to the separation of photogenerated electron-hole pairs on metal nanoparticles and the structural distortions of g-C3N4.
Article
Materials Science, Multidisciplinary
Jan Prech, Ewelina Szaniawska, Kamila Koci, Jiri Cejka, Beatriz Trindade Barrocas, Miroslava Filip Edelmannova
Summary: This study aims to investigate the correlation between the structural properties of mesoporous zeolites and their photocatalytic performance. The results show that titanosilicate photocatalysts exhibit higher selectivity towards CO2 reduction products compared to commercial TiO2, P25. The photocatalysts with unit-cell-thick nanosheets and MFI zeolite topology demonstrate the highest photoreduction quantum efficiency. Additionally, the interaction strength and hydrophilicity of the photocatalysts play significant roles in the photocatalytic CO2 reduction.
APPLIED MATERIALS TODAY
(2022)
Article
Engineering, Environmental
Tomas Prostejovsky, Alena Kulist'akova, Martin Reli, Radim Zebrak, Kamila Koci
Summary: A continuous flow photochemical pilot plant unit was used to remove VOC from waste gas stream. The efficiency of the system was studied by controlling reaction conditions, detecting intermediates, and analyzing reaction products. The conversion of the model substances depends on the initial concentration of the pollutant, the flow rate, and the type of pollutant. The results showed that the highest conversion was achieved at an initial pollutant concentration of 50 ppmv and a flow rate of 100 m3 center dot h-1. The study provides insights into the degradation pathways of VOCs and presents an effective AOPs system for VOC removal.
PROCESS SAFETY AND ENVIRONMENTAL PROTECTION
(2022)
Article
Multidisciplinary Sciences
Petr Praus, Lenka Rehackova, Jakub Cizek, Aneta Smykalova, Martin Kostejn, Jiri Pavlovsky, Miroslava Filip Edelmannova, Kamila Koci
Summary: This study synthesized C3N4 from nitrogen-rich precursors, forming vacancy complexes that are beneficial for hydrogen generation, and the photocatalyst exhibited higher performance than bulk C3N4 synthesized in air.
SCIENTIFIC REPORTS
(2022)
Article
Chemistry, Applied
Miroslava Filip Edelmannova, Martin Reli, Peter Nadrah, Nejc Rozman, Rudolf Ricka, Andrijana Sever Skapin, Miha Nosan, Urska Lavrencic Stangar, Kamila Koci
Summary: This study aims to investigate the correlation between the structural properties of different TiO2 catalysts and their photocatalytic performance and selectivity in CO2 reduction at different pH levels. Two types of TiO2 catalysts were prepared and extensively characterized using various techniques. The prepared catalysts exhibited higher selectivity in CO2 reduction compared to a commercial P25 catalyst. The TiSG catalyst, which had the lowest portion of hydroxyl oxygen species, showed the highest photoreduction efficiency. The study also explored the effect of pH on the efficiency and selectivity of photocatalytic CO2 reduction, revealing different product distributions in acidic and basic environments.
Article
Chemistry, Physical
Helena Drobna, Vendula Meinhardova, Lada Dubnova, Katerina Kozumplikova, Martin Reli, Kamila Koci, Libor Capek
Summary: The study compares the photocatalytic behavior of TiO2, NiO-TiO2, and Ni-NiO-TiO2 photocatalysts in photocatalytic hydrogen production from methanol-water solution. It was found that Ni-NiO-TiO2 photocatalysts exhibited significantly higher hydrogen production than NiO-TiO2 photocatalysts. The study investigated the structural, redox, and optical properties of the prepared photocatalysts using various characterization techniques.
Article
Chemistry, Multidisciplinary
Adeem Ghaffar Rana, Michael Schwarze, Minoo Tasbihi, Xavier Sala, Jordi Garcia-Anton, Mirjana Minceva
Summary: In this study, exfoliated graphitic carbon nitride loaded with non-noble metals was synthesized and tested for hydrogen production. Among the different synthesis methods, the colloidal deposition method showed the best performance for Ni-loaded ex-g-CN with a hydrogen production rate of 43.6 μmol h(-1) g(-1).
Article
Chemistry, Physical
Chakib Alaoui, Mohamed Karmaoui, Ahmed Bekka, Miroslava Filip Edelmannova, Juan Jesus Gallardo, Javier Navas, Wassila Touati, Imene Kadi Allah, Bruno Figueiredo, Joao Antonio Labrincha, Martin Reli, Kamila Koci, David Maria Tobaldi
Summary: Clean energy and air and water pollution have become significant challenges in today's society. Photocatalysis, an advanced oxidation process that utilizes light to activate a semiconductor, provides a potential solution to address these issues. This study found that incorporating graphene nanoplatelets into the TiO2/WO3 heterojunction significantly improved photocatalytic hydrogen generation.
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
(2023)
Article
Biochemistry & Molecular Biology
Tomas Prostejovsky, Alena Kulistakova, Martin Reli, Radim Zebrak, Kamila Koci
Summary: The feasibility of using advanced oxidation processes (AOPs) for abatement of ammonia from livestock buildings was examined. Pilot plant experiments were conducted using a two-step unit containing a dry photolytic reactor (UV185/UV254/O-3) and a photochemical scrubber (UV254/H2O2). The unit efficiency was tested for different concentrations and air flows, and demonstrated high removal rates of ammonia, even at high flow rates. The combination of UV and ozone effectively removed ammonia from the aqueous phase without adjusting the pH. The cost efficiency of the technology was also assessed, showing promising results.
PHOTOCHEMICAL & PHOTOBIOLOGICAL SCIENCES
(2023)
Article
Chemistry, Physical
Marcel Sihor, Muhammad Bilal Hanif, Guru Karthikeyan Thirunavukkarasu, Viktoriia Liapun, Miroslava Filip Edelmannova, Tomas Roch, Leonid Satrapinskyy, Tomas Plecenik, Sajid Rauf, Karol Hensel, Olivier Monfort, Martin Motola
Summary: This study demonstrates the facile and scalable fabrication of large-area TiO2 nanostructures via electrochemical anodization, with excellent photocatalytic activity and hydrogen production. The formation of different TiO2 nanostructures with varied morphology and performance at different applied potentials was observed. The highest caffeine photodegradation and hydrogen production rates were achieved using specific TiO2 nanostructures. This work highlights the potential strategy for the synthesis of large-area anodic TiO2 nanostructures for efficient photocatalysis and hydrogen production.
CATALYSIS SCIENCE & TECHNOLOGY
(2022)
Article
Chemistry, Multidisciplinary
Bostjan Zener, Lev Matoh, Martin Reli, Andrijana Sever Skapin, Romana Cerc Korosec
Summary: This study successfully prepared sulfur and nitrogen co-doped and platinum modified titanium dioxide powders with high photocatalytic activity by controlling the type and amount of acid and dopants used in the synthesis. The changes in surface area and crystallite size were consistent with the photocatalytic activity and photocurrent behavior.
ACTA CHIMICA SLOVENICA
(2022)
Article
Engineering, Environmental
Huiqin Wang, Haopeng Jiang, Pengwei Huo, Miroslava Filip Edelmannova, Libor Capek, Kamila Koci
Summary: Efficient NiO nanoparticles/TiO2 nanorods p-n heterojunction structure photocatalyst was constructed through reasonable design, showing enhanced photoactivity and hydrogen production. The detailed characterization of the photocatalyst's photoelectrochemical properties was conducted, followed by discussion of the photocatalytic reduction mechanism.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2022)
