by Pan Xie  , Dongdong Du  , Cheng Xue  and Sanshan Shi

Received: 01 April 2022;  Published: 10 May 2022;  doi: 10.21926/cr.2202014

The process of light-induced C-H oxygenation is of high interest as it can be used for the construction of oxygenated compounds. Herein, we report a mild and general method for the efficient synthesis of aromatic ketones following the process of metal-free C-H oxygenation. With air as the oxidant, high functional tolerance was demonstrated, and the desired ketones were obtained in moderate to excellent yields at room temperature (25 oC). Mechanistic studies suggested that the oxidative transformation potentially oc [...]

by Myllena R. Rodrigues dos Santos  , Daniela B. Battaglia Hirata  and Joelise A.F. de Alencar Figueira Angelotti

Received: 16 February 2022;  Published: 07 May 2022;  doi: 10.21926/cr.2202013

Enzymes are extensively used in biotechnological processes in several areas of industry. They are sustainable and safe, and their specificity is another characteristic that improves the performance in the process. Among enzymes, lipase is relevant due to the ability to play different roles in the industry and the possibility of collecting them from microbial sources that are found in industrial residues. This can reduce the costs of enzyme production. In relation to that, lipase immobilization is an interesting pro [...]

by Shangkun Deng  , Yini Lei  , Yiyu Deng  , Yilan Lai  and Xingyuan Gao

Received: 29 January 2022;  Published: 26 April 2022;  doi: 10.21926/cr.2202012

The use of the dry reforming of methane (DRM) to convert the two principal greenhouse gases, methane and carbon dioxide, to syngas (a mixture of H2 and CO) has attracted increasing attention in recent years. However, the DRM reaction suffers from the twin disadvantages of carbon deposition and sintering, so a highly efficient and robust catalyst with superior anti-deactivation properties is required. One way to meet this need is to incorporate active metals into crystalline oxides, such as perovskite. In this paper [...]

by Mouhamad Rachini  , Mira Jaafar  , Fatima Al Ali  , Zahraa Slaiman  , Mohamad Kassem  , Eugene Bychkov  , T. Jean Daou  , Joumana Toufaily  and Tayssir Hamieh

Received: 29 January 2022;  Published: 21 April 2022;  doi: 10.21926/cr.2202011

The use of Pd-Cu bimetallic catalysts in the reduction of aqueous nitrate ions by hydrogen was studied. The catalysts were supported on multi-walled carbon nanotubes (MWCNTs), activated carbon (AC), and Titania, and the influence of the support on the nitrate reduction activity in water was then investigated. The catalysts were characterized before and after use by FT-IR, XRD, SEM, EDX, and Laser Granulometry. It was found that the surface characteristics of the support have an influence on the catalyst activity, w [...]

by Mingyu Wang  , Jie Liu  , Jinpeng Li  and Tiesheng Li

Received: 21 March 2022;  Published: 14 April 2022;  doi: 10.21926/cr.2202010

A new chiral cyclopalladated ferrocenyl imine catalyst (called 4a2) was designed and synthesized, and its self-assembly catalytic polymeric brush supported on silicon (denoted as Si@PB4a2) was also fabricated by surface-initiated atom transfer radical polymerization (ATRP) and characterized. The catalytic properties of monomer 4a2 in homogeneous and Si@PB4a2 in heterogeneous in Heck and Suzuki cross-coupling were investigated, respectively. They exhibited higher catalytic activity in Heck, and Suzuki coupling react [...]

by Anne Galarneau  , Lucie Desmurs  , Cyril Vaulot  , Habiba Nouali  , Benedicte Lebeau  , T. Jean Daou  , Vasile Hulea  , Claudia Cammarano  , Isabelle Batonneau-Gener  and Alexander Sachse

Received: 26 January 2022;  Published: 14 April 2022;  doi: 10.21926/cr.2202009

It is important to elucidate the role of the surface areas and pore volumes of hierarchical zeolites to understand their behavior as catalysts. Micro-and mesopore surface areas and volumes of the hierarchical MFI (Mobil Five zeolites) were assessed following several methods: (i) N2 adsorption at 77 K using classical and corrected t-plot analyses methods, (ii) pre-adsorption of n-nonane was followed by the study of the N2 adsorption at 77 K, and (iii) non-local-density functional theory (NLDFT) analysis using either [...]

by Rui Wang  , Dong Lin  , Minghuan Gao  , Linna Guo  , Tiesheng Li  and Minghua Liu

Received: 29 January 2022;  Published: 07 April 2022;  doi: 10.21926/cr.2202008

A series of novel Bi2MoO6/Ag/Ag2CrO4 heterostructure photocatalysts (denoted as BA-X, X = 1, 3, 5, 10) were synthesized using a coprecipitation method. These photocatalysts were characterized by scanning electron microscopy (SEM), X-ray diffraction (XRD), UV-vis spectroscopy, and X-ray photoelectron spectroscopy (XPS) and their photocatalytic properties were investigated. Compared with pure Bi2MoO6 or Ag2CrO4, BA-5 exhibited a higher photocatalytic property and broader light absorption. In addition, the surface pla [...]

by Thibaut Triquet  , Claire Tendero  , Laure Latapie  , Romain Richard  and Caroline Andriantsiferana

Received: 20 January 2022;  Published: 15 March 2022;  doi: 10.21926/cr.2201007

This work reports the performance of a sequential adsorption/photocatalysis process using activated carbon fibers with deposited TiO2 for the elimination of the antibiotic ciprofloxacin (CIP) in water. A commercial activated carbon fiber (ACF10) was selected as the support, and a TiO2 coating was synthesized using Metal Organic Chemical Vapor Deposition (MOCVD). Experiments were carried out using a photocatalytic reactor irradiated with monochromatic LEDs (365nm). Two different processes have been studied: adsorpti [...]

by Kate M. Waldie  and Sriram Katipamula

Received: 31 December 2021;  Published: 22 February 2022;  doi: 10.21926/cr.2201006

Fuel cells based on renewable synthetic fuels are promising alternatives to fossil fuel combustion for efficient electricity production. Much focus has been placed on hydrogen as a chemical fuel, but being a flammable gas, there are challenges with its safe handling. Formic acid is an attractive liquid fuel for use in direct formic acid or formate fuel cells, and it can in principle be produced from the thermal or electrochemical reduction of carbon dioxide. Over the past ten years, advances have been made in the d [...]

by José C. Conesa

Received: 29 November 2021;  Published: 21 February 2022;  doi: 10.21926/cr.2201005

It is important to understand the band offsets between semiconductors, which are crucial to determine the direction of electron transfer at the interfaces. Two methods are normally used to determine the direction from the first principles: alternating slabs put in contact (without empty spaces between them) and separate calculations for each material surface in the presence of vacuum spaces. The first method may introduce distortions due to insufficient epitaxial match, which may lead to bandgap changes, and the se [...]

by Xiu-Zhi Wei  , Jianguo Liu  and Longlong Ma

Received: 28 December 2021;  Published: 21 February 2022;  doi: 10.21926/cr.2201004

In recent years, research on converting biomass platform compounds into high-value chemicals and pharmaceutical intermediates has garnered huge interest. Nitrile and amide groups are key structures in natural products and biologically active molecules. The direct conversion of biomass platform compounds into nitriles and amides will undoubtedly be an important guide for biomass utilization. In this paper, a facile and efficient triphosgene-assisted one-pot conversion for aldehydes and ketones into nitrile and amide [...]

by Louguangshu Huang  , Hui Liu  , Xiaoxia Xue  , Wuduo Zhao  and Tiesheng Li

Received: 13 December 2021;  Published: 03 February 2022;  doi: 10.21926/cr.2201003

In this article, an approach to generate self-assembly cyclopalladated polythiophene imine monolayers (denoted as ITO@Pd-CPTIMs) is described. The monolayers were fabricated by combining self-assembly (SA), hybrid doping (HD), and electrochemical polymerization (ECP) called SA-HD-ECP. The catalytic activity and stability of the polymerized monolayers in the Suzuki coupling reaction were improved by modulating the structure and morphology in hybrid doping using different thiophene derivatives, concentrations, and sc [...]

by Jéssica A.P. Ponciano  and Marcelo S. Batista

Received: 01 December 2021;  Published: 26 January 2022;  doi: 10.21926/cr.2201002

In this paper, the relationship between activity and structure of Cu2+ in different chemical environments of Cu-BETA, La2CuO4, and CuO nanocatalysts was systematically investigated for acetonitrile combustion. The study revealed that exchanged and octahedral species of Cu2+ coexist in Cu-BETA, while octahedral species are dominant in CuO and La2CuO4. All nanocatalysts achieved high conversion rates of acetonitrile, which rapidly increased with temperature. CuO and La2CuO4 led to the formation of undesired products [...]

by Fabien Drault  , Youssef Snoussi  , Camila P. Palombo Ferraz  , Joelle Thuriot-Roukos  , Svetlana Heyte  , Ivaldo Itabaiana Junior  , Maya Marinova  , Sebastien Paul  and Robert Wojcieszak

Received: 25 October 2021;  Published: 13 January 2022;  doi: 10.21926/cr.2201001

Regardless of their size, supported gold nanoparticles are largely used for liquid-phase oxidation reactions. Small gold nanoparticles exhibit good performance during the reduction of organic compounds. The direct reduction of carboxylic acid to aldehyde is a famous and familiar reaction in the field of organic chemistry and is considered as one of the fundamental chemical transformations. Herein, we present Au/hydrotalcite, Au/MgO, and Au/Al2O3 systems as heterogeneous versatile catalysts to realize the oxidation [...]

by Ludmila Velichkina  , Yakov Barbashin  and Alexander Vosmerikov

Received: 10 October 2021;  Published: 01 December 2021;  doi: 10.21926/cr.2104004

The objective of this research was to analyze the effect of different concentrations of nitric and hydrochloric acids on the structural, acidic, and catalytic properties of a post-synthetic treated ZSM-5 type zeolite at various temperatures. The properties of zeolite catalysts were determined using different methods, such as the Brunauer-Emmett-Teller (BET) method for specific surface area, temperature-programmed desorption (TPD) of ammonia method for acidic properties, and a flow-through unit with fixed bed cataly [...]

by Lin Xie  and Donald Kirk

Received: 09 June 2021;  Published: 16 September 2021;  doi: 10.21926/cr.2103003

Fe-rich alloys have been widely studied as catalyst materials for the cathodic oxygen reduction reaction (ORR) in hydrogen fuel cells, and many have shown high activities. The stability of Fe-rich catalysts has also been researched, and some studies have shown promising results using an accelerated stress test (AST), which uses a potential cycling method. However, for commercial fuel cell applications, such as standby power systems, the catalyst has to tolerate a high potential for a long period, which can not be r [...]

by Minato Nakamura  and Yoshinori Murakami

Received: 17 August 2021;  Published: 13 September 2021;  doi: 10.21926/cr.2103002

The photocatalytic reaction involved in TiO2 photocatalysis was investigated using a microreactor coated with TiO2 film on the glass plate attached on one side of the microreactor. It was confirmed that the effect of H2O2 on the photocatalytic degradation efficiency of azo dyes (acid orange 7, acid red 151, and acid yellow 23) was dependent on the polymorphs (anatase and rutile) of TiO2 coated on the glass plate of the UV-irradiated microreactor. Scavengers of holes (KI) and electrons (p-benzoquinone) were added to [...]

by Shiping Wang  , Georg Bendt  and Stephan Schulz

Received: 24 May 2021;  Published: 16 July 2021;  doi: 10.21926/cr.2103001

One-pot synthesis of mesoporous hybrid material consisting of Mn-Co/CoO nanoparticles encapsulated in an N-doped graphene shell decorated with Mo2C nanoparticles (Mo2C-NC@Mn-Co/CoO) was reported. The Mn and Mo components synergistically refined the graphitized carbons due to the interactions with N and C atoms while promoting the stability of the Co/CoO nanoparticles. These components exhibited a beneficial effect on the dispersion of the active metal/metal oxide nanoparticles and the formation of a mesoporous stru [...]

by Míriam de Fátima Soares  , Frederico Keizo Odan  and Marcos Paulo Gomes Mol

Received: 09 June 2025;  Published: 04 December 2025;  doi: 10.21926/aeer.2504034

The development and utilization of pharmaceuticals, notably antiretrovirals (ARVs), have significantly enhanced both human quality of life and life expectancy. Nevertheless, the excretion of these compounds into aquatic environments, often exacerbated by inadequate sanitation infrastructure, poses considerable risks to biota. This investigation evaluated the environmental impact of 14 ARVs consumed within the municipality of Belo Horizonte (BH), Brazil. The assessment employed the Environmental Risk Assessment (ERA [...]

by Carlos Armenta-Déu

Received: 04 June 2025;  Published: 03 December 2025;  doi: 10.21926/aeer.2504033

The rising pollution levels in congested urban areas pose a serious threat to human health. Many solutions have been proposed to control and reduce gas emissions from road traffic, with results that are not entirely satisfactory. The adoption of new techniques and methodologies for early detection of pollutant emissions may enable effective management and control of road traffic contamination. The proposed method introduces an interactive protocol that facilitates communication between the traffic control center an [...]

by G.-Fivos Sargentis  and Nikolaos Papadodimas

Received: 11 June 2025;  Published: 11 November 2025;  doi: 10.21926/aeer.2504032

This study proposes a novel creative tourism model integrating artistic creation with circular economy principles to foster regional revitalization in North Euboea, Greece. Employing a case study approach, it develops the concept of “Cultural Cells”—dedicated hubs for artists and art students specializing in painting and sculpture—designed to enhance tourism through immersive engagement. The methodology combines qualitative analysis of regional cultural and environmental assets with theoretical estimates of circula [...]

by Isadora Muller de Oliveira  , Letícia Caroline de Oliveira Vital  , Izabela de Siqueira Reis Regueira  and Marcos Paulo Gomes Mol

Received: 02 July 2025;  Published: 11 November 2025;  doi: 10.21926/aeer.2504031

The management of healthcare waste (HCW) presents a significant environmental and public health challenge, aggravated by gaps in current Brazilian federal regulations. This study provides a comprehensive analysis of specific state and municipal legislation on HCW, comparing it with ANVISA Resolution No. 222/2018 and CONAMA Resolution No. 358/2005 to ascertain whether local regulations enhance management practices and can act as supplementary instruments to federal guidelines. The methodology was structured into thr [...]

by Advances in Environmental and Engineering Research Editorial Office

Received: 26 October 2025;  Published: 27 October 2025;  doi: 10.21926/aeer.2504030

by Marta I. Litter

Received: 15 September 2025;  Published: 22 September 2025;  doi: 10.21926/aeer.2503029

by Masoume M. Raeissi  and Rob Knapen

Received: 07 April 2025;  Published: 12 August 2025;  doi: 10.21926/aeer.2503028

Environmental science addresses critical global challenges, including climate change, biodiversity loss, and sustainability. These complex topics generate a vast amount of both structured and unstructured data, from remote sensing output to policy documents, guidelines, and scientific literature. Effectively processing and utilizing this information is essential for advancing research and supporting decision-making. Large Language Models (LLMs) have shown remarkable capabilities in natural language understanding an [...]