Evidence map›Paper›PMID 41772216›Full record

ArticleMikrochimica acta2026

Rapid detection of hexavalent chromium using CuO/CN/LDH as an oxidase mimetic and the construction of a paper-based device.

Shaohui Li, Sijia Hao, Wen Li, Ran Meng, Qiang Wang, Yuqing Wang, Lei Wang, Xinjing Liu, Yuanyuan Zhou, Haitong Wang and 2 more

Abstract read
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In one paragraph

Article in Mikrochimica acta, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.

0numbers the graph read from it
0cells of the map it votes in
0citing papers in PubMed
–field-weighted citation impact
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

0 citing papers in PubMed.

No citing paper in PubMed yet.

4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

12 authors.

Shaohui LiKey Laboratory of Resource Environment and Sustainable Development of Oasis, College of Geography and Environment Science, Northwest Normal University, Lanzhou, 730070, China.
Sijia HaoKey Laboratory of Resource Environment and Sustainable Development of Oasis, College of Geography and Environment Science, Northwest Normal University, Lanzhou, 730070, China.
Wen LiKey Laboratory of Resource Environment and Sustainable Development of Oasis, College of Geography and Environment Science, Northwest Normal University, Lanzhou, 730070, China.
Ran MengKey Laboratory of Resource Environment and Sustainable Development of Oasis, College of Geography and Environment Science, Northwest Normal University, Lanzhou, 730070, China.
Qiang WangKey Laboratory of Resource Environment and Sustainable Development of Oasis, College of Geography and Environment Science, Northwest Normal University, Lanzhou, 730070, China.
Yuqing WangKey Laboratory of Resource Environment and Sustainable Development of Oasis, College of Geography and Environment Science, Northwest Normal University, Lanzhou, 730070, China.
Lei WangKey Laboratory of Resource Environment and Sustainable Development of Oasis, College of Geography and Environment Science, Northwest Normal University, Lanzhou, 730070, China.
Xinjing LiuKey Laboratory of Resource Environment and Sustainable Development of Oasis, College of Geography and Environment Science, Northwest Normal University, Lanzhou, 730070, China.
Yuanyuan ZhouKey Laboratory of Resource Environment and Sustainable Development of Oasis, College of Geography and Environment Science, Northwest Normal University, Lanzhou, 730070, China.
Haitong WangKey Laboratory of Resource Environment and Sustainable Development of Oasis, College of Geography and Environment Science, Northwest Normal University, Lanzhou, 730070, China.
Dongxia ZhangKey Laboratory of Resource Environment and Sustainable Development of Oasis, College of Geography and Environment Science, Northwest Normal University, Lanzhou, 730070, China.
Xibin ZhouKey Laboratory of Resource Environment and Sustainable Development of Oasis, College of Geography and Environment Science, Northwest Normal University, Lanzhou, 730070, China. zhouxb@nwnu.edu.cn.

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

A ternary structure (CuO/CN/LDH) composed of LDH-anchored g-C3N4 nanosheets loaded with CuO nanoparticles was successfully constructed via hydrothermal and co-precipitation methods, and a colorimetric sensing platform for hexavalent chromium (Cr(VI)) detection was proposed. The engineered nanomaterial demonstrates significantly enhanced oxidase-mimetic activity in the presence of Cr(VI), enabling rapid catalytic oxidation of 3,3’,5,5’-tetramethylbenzidine (TMB) with distinct chromogenic response. Mechanistic investigations reveal that Cr(VI) facilitates the conversion of dissolved oxygen into superoxide anions via redox cycling, thereby accelerating TMB oxidation. The sensor exhibits exceptional analytical performance with high accuracy (recoveries of 97.3-103.8%) and sensitivity (detection limit of 25 nM) in aqueous sample analysis. The sensor demonstrated excellent selectivity against common interfering metal ions, as well as high stability (still above 95% for 8 weeks). Notably, an innovative paper-based analytical device was developed in conjunction with smartphone-assisted colorimetric detection, achieving on-site visual quantification of Cr(VI) within 15 min. This integrated system provides a field-deployable solution for environmental monitoring, combining operational simplicity with reliable detection capabilities. This study addresses the main limitations of Cr(VI) sensors, such as their dependence on complex instruments and poor stability of natural enzymes, and demonstrates low detection limits, excellent selectivity, and long-term stability. In addition, the proposed methodology advances current sensing technologies by merging nanomaterial engineering with portable detection platforms, demonstrating significant potential for heavy metal surveillance in water quality management. Based on this, this study also constructed a paper-based colorimetric detection sensor.

Indexed as

Biomimetic MaterialsChromiumColorimetryPaperBenzidinesCopperGraphiteLimit of DetectionNitrogen CompoundsOxidation-ReductionOxidoreductasesSmartphoneWater Pollutants, Chemical3,3',5,5'-tetramethylbenzidineBenzidinesChromiumchromium hexavalent ionCoppercupric oxideGraphitegraphitic carbon nitrideNitrogen CompoundsOxidoreductasesWater Pollutants, ChemicalCr(Ⅵ)CuO nanoparticlesg-C3N4Paper-based sensorSmartphone assisted colorimetric detection

Identifiers

PMID41772216

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Registered trials

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Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.