DOI: 10.5061/dryad.kwh70rz9w
title: Data from: Preparation of Pt and bamboo charcoal co-modified TiO2 for formaldehyde sensing at room temperature

description: Anatase TiO2 has evolved to be one of the most attractive materials for
 gas sensing due to its strong oxidation activity and excellent sensing
 properties. In this study, we prepared a Pt and bamboo charcoal
 co-modified nano-TiO2 using one-pot hydrothermal process and applied it
 for detection of formaldehyde. The successful incorporation of precious
 metal Pt and bamboo charcoal onto TiO2 was confirmed by SEM, TEM, EDS,
 XRD, and XPS. These modifiers significantly improved the response of TiO2
 to formaldehyde, e.g., the response signal increased by 4 times, while the
 response time decreased from 91.05 to 67.76 s. The sample with 0.5@Pt and
 0.5@C bamboo charcoal performed the best. Our work showed the potential of
 using biomass-derived carbon to improve the detection of formaldehyde.
description: For electrical and sensing
 characterizations, a small amount of Pt and bamboo charcoal
 co-modified TiO<sub>2</sub> obtained by grinding was mixed
 with distilled water and stirred into a sticky shape, then apply to the
 interdigitated electrode and place in an indoor environment to dry
 naturally. After drying, the electrode was placed in a tube furnace and
 sintered under N<sub>2</sub> protection at 250 °C for 1 h.
 After that, the Pt/TiO<sub>2</sub>/C sensor electrode was
 obtained by waiting for the electrode to cool to room temperature. The
 prepared electrode was placed in formaldehyde gas environment for
 gas-sensitive performance test, and the sensing performance of the
 material was reflected by response strength A: A = (I<sub>a</sub> -
 I<sub>0</sub>)/I<sub>0</sub> Where I<sub>0</sub> is the current of the material in the air environment, and Ia is the current of the material in the formaldehyde environment. A controlled experimental study was conducted to investigate the impact of Pt and bamboo charcoal addition on the sensing performance of Pt/TiO<sub>2</sub>/C. Three types of materials were prepared using the hydrothermal method with the same concentration ratio of TiO<sub>2</sub>, Pt/TiO<sub>2</sub>, and bamboo charcoal-modified TiO<sub>2</sub> (TiO<sub>2</sub>/C). The materials were then fabricated into electrodes, and their sensing performance was compared with that of Pt/TiO<sub>2</sub>/C. To determine the optimal composite ratio, the quantity of Pt added to the Pt/TiO<sub>2</sub>/C with a 10% Pt modified (the molar ratio of Pt and TiO<sub>2</sub> is 0.1:1) was adjusted. Subsequently, the sensing performance of electrodes fabricated from materials with different Pt modified, including 2.5% Pt (0.25@Pt, 0.25 times the original amount), 5.0% Pt (0.5@Pt), 20% Pt (2.0@Pt), and the original 10% Pt modified (1.0@Pt), was compared to determine the optimal composite ratio. After selecting the better material, the composite ratio of 0.1 g bamboo charcoal in Pt/TiO<sub>2</sub>/C was varied. The sensing performance of electrodes fabricated from materials with different bamboo charcoal added, including 0.01 g bamboo charcoal (0.1@C, 0.1 times the original amount), 0.05 g bamboo charcoal (0.5@C), 0.2 g bamboo charcoal (2.0@C), and the original 0.1 g bamboo charcoal (1.0@C), was then compared to determine the optimal composite ratio.
description: # Data from: Preparation of Pt and bamboo charcoal co-modified TiO2 for
 formaldehyde sensing at room temperature
 [https://doi.org/10.5061/dryad.kwh70rz9w](https://doi.org/10.5061/dryad.kwh70rz9w) ## Key information for understanding and reuse of our data Dataset as Excel file The Excel file contains 9 data sheets. I. First six sheets illustrate morphology characterization information of Pt/TiO2/C. 1\. surface EDS-point EDS mapping of Pt/TiO2/C. 2\. XRD patterns of TiO2/C and Pt/TiO2/C. 3-6. XPS spectra of TiO2/C and Pt/TiO2/C. II. The seventh to ninth sheet shows the sensing performance of TiO2 andd Pt/TiO2/C series samples. 7\. The sensing performance of TiO2 series samples. 8\. The performance of Pt/TiO2/C. 9\. The current-time measurements and selectivity of Pt/TiO2/C. DATA-SPECIFIC INFORMATION FOR: surface EDS-point EDS mapping of Pt/TiO2/C. 1\. Number of variables: 2 2\. Number of cases/rows: 4096 3\. Variable List: \* Energy: （kV）the X-ray energy, and the magnitude of this value depends on the characteristic energy released during the energy level transition process. \* intensity: the signal strength, which is the number of X-ray photons detected per unit time. 4\. Missing data codes: None 5\. Specialized formats or other abbreviations used: None DATA-SPECIFIC INFORMATION FOR: XRD patterns of TiO2/C and Pt/TiO2/C. 1\. Number of variables: 7 2\. Number of cases/rows: 3001 3\. Variable List: \* 2θ: 2θ angle, which is twice the incident angle of the X-ray. \* intensity: the signal strength, which is the intensity after diffraction. 4\. Missing data codes: None 5\. Specialized formats or other abbreviations used: None DATA-SPECIFIC INFORMATION FOR: Pt 4f XPS spectra of TiO2/C and Pt/TiO2/C. 1\. Number of variables: 2 2\. Number of cases/rows: 231 3\. Variable List: \* Binding energy: the abscissa represents the binding energy (or kinetic energy) of electrons, measured in electron volts (eV). \* intensity: the intensity or counting rate of photoelectrons, expressed in cps (Counts per second), which is the counting rate per second. 4\. Missing data codes: None 5\. Specialized formats or other abbreviations used: None DATA-SPECIFIC INFORMATION FOR: O 1s XPS spectra of TiO2/C and Pt/TiO2/C. 1\. Number of variables: 6 2\. Number of cases/rows: 201 3\. Variable List: \* Binding energy: the abscissa represents the binding energy (or kinetic energy) of electrons, measured in electron volts (eV). \* intensity: the intensity or counting rate of photoelectrons, expressed in cps (Counts per second), which is the counting rate per second. 4\. Missing data codes: None 5\. Specialized formats or other abbreviations used: None DATA-SPECIFIC INFORMATION FOR: Ti 2p XPS spectra of TiO2/C and Pt/TiO2/C. 1\. Number of variables: 2 2\. Number of cases/rows: 271 3\. Variable List: \* Binding energy: the abscissa represents the binding energy (or kinetic energy) of electrons, measured in electron volts (eV). \* intensity: the intensity or counting rate of photoelectrons, expressed in cps (Counts per second), which is the counting rate per second. 4\. Missing data codes: None 5\. Specialized formats or other abbreviations used: None DATA-SPECIFIC INFORMATION FOR: C 1s XPS spectra of TiO2/C and Pt/TiO2/C. 1\. Number of variables: 4 2\. Number of cases/rows: 191 3\. Variable List: \* Binding energy: the abscissa represents the binding energy (or kinetic energy) of electrons, measured in electron volts (eV). \* intensity: the intensity or counting rate of photoelectrons, expressed in cps (Counts per second), which is the counting rate per second. 4\. Missing data codes: None 5\. Specialized formats or other abbreviations used: None DATA-SPECIFIC INFORMATION FOR: The sensing performance of TiO2 series samples. 1\. Number of variables: 8 2\. Number of cases/rows: 900 3\. Variable List: \* t: time (s). \* A: the sensing performance of the material was reflected by response strength A. 4\. Missing data codes: None 5\. Specialized formats or other abbreviations used: None DATA-SPECIFIC INFORMATION FOR: The performance of Pt/TiO2/C. 1\. Number of variables: 16 2\. Number of cases/rows: 335 3\. Variable List: \* t: time (s). \* A: the sensing performance of the material was reflected by response strength A. 4\. Missing data codes: None 5\. Specialized formats or other abbreviations used: None DATA-SPECIFIC INFORMATION FOR: The current-time measurements and selectivity of Pt/TiO2/C. 1\. Number of variables: 2 2\. Number of cases/rows: 707 3\. Variable List: \* t: time (s). \* A: the sensing performance of the material was reflected by response strength A. 4\. Missing data codes: None 5\. Specialized formats or other abbreviations used: None